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LVMREPORT(7) Miscellaneous Information Manual LVMREPORT(7)
lvmreport — LVM reporting and related features
LVM uses a single reporting infrastructure that sets standard on
LVM command's output and it provides wide range of configuration
settings and command line options to customize report and filter
the report's output.
Categorization based on reporting facility
Based on functionality, commands which make use of the reporting
infrastructure are divided into two groups:
Report-oriented commands
These commands inform about current LVM state and their
primary role is to display this information in a concise
way. To make a distinction, we will name this report as
main report. The set of report-only commands include: pvs,
vgs, lvs, pvdisplay, vgdisplay, lvdisplay, lvm devtypes,
lvm fullreport. For further information about main report,
see Main report specifics.
Processing-oriented commands
These commands are responsible for changing LVM state and
they do not contain any main report as identified for
report-oriented commands, they only perform some kind of
processing. The set of processing-oriented commands
includes: pvcreate, vgcreate, lvcreate, pvchange, vgchange,
lvchange, pvremove, vgremove, lvremove, pvresize, vgextend,
vgreduce, lvextend, lvreduce, lvresize, lvrename, pvscan,
vgscan, lvscan, pvmove, vgcfgbackup, vgck, vgconvert,
vgexport, vgimport, vgmknodes.
If enabled, so-called log report is either displayed solely (for
processing-oriented commands) or in addition to main report (for
report-oriented commands). The log report contains a log of
operations, messages and per-object status with complete object
identification collected during LVM command execution. See Log
report specifics for more information about this report type.
Terms
When describing reporting functionality and features in this text,
we will use terms row and column. By row we mean series of values
reported for a single entity (for example single PV, VG or LV).
Each value from the row then belongs to a column of certain type.
The columns have column headings which are short descriptions for
the columns. The columns are referenced by column names. Please
note that this text is also using term field interchangeably with
the term column. Most of the time the term columns is abbreviated
as col in configuration.
Common report configuration settings and command line options
There are common configuration settings and command line options
which apply to both main report and log report. The following
lists contain all of them, separated into groups based on their
use.
Common configuration settings
Changing report output format, composition and other output
modifiers:
– global/suffix
– global/units
– report/aligned
– report/binary_values_as_numeric
– report/columns_as_rows
– report/compact_output
– report/compact_output_cols
– report/headings
– report/list_item_separator
– report/mark_hidden_devices
– report/output_format
– report/prefixes
– report/quoted
– report/separator
– report/time_format
– report/two_word_unknown_device
Special settings
– report/buffered
This document does not describe these settings in more detail – if
you need detailed information, including values which are accepted
for the settings, please run lvmconfig --type default
--withcomments <setting>. There are more configuration settings
in addition to the common set listed above, but they are specific
to either main report or log report, see main report specifics and
log report specifics for these settings. Besides configuring
reports globally by using configuration settings, there are also
command line options you can use to extend, override or further
specify the report configuration.
Common command line options
Definition of the set of fields to use
-o|--options FieldSet
Field set to use. See main report specifics and log
report specifics for information about field sets
configured with global configuration settings that
this option overrides.
-o|--options +FieldSet
Fields to include in current field set. See main
report specifics and log report specifics for
information about field sets configured with global
configuration settings that this option extends.
-o|--options -FieldSet
Fields to exclude from current field set. See main
report specifics and log report specifics for
information about field sets configured with global
configuration settings that this option reduces.
-o|--options #FieldSet
Compaction of unused fields. Overrides
report/compact_output_cols configuration setting.
Sorting
-O|--sort +FieldSet
Fields to sort by in ascending order. See main
report specifics and log report specifics for
information about field sets configured with global
configuration settings that this option overrides.
-O|--sort -FieldSet
Fields to sort by in descending order. See main
report specifics and log report specifics for
information about field sets configured with global
configuration settings that this option overrides.
Selection
-S|--select Selection
Define selection criteria for report output. For log
report, this also overrides
log/command_log_selection configuration setting, see
also log report specifics.
Changing output format and composition
--reportformat
Overrides report/output_format configuration
setting.
--aligned
Overrides report/aligned configuration setting.
--binary
Overrides report/binary_values_as_numeric
configuration setting.
--headings
Overrides report/headings configuration settings.
--nameprefixes
Overrides report/prefixes configuration setting.
--noheadings
Overrides report/headings configuration setting.
--nosuffix
Overrides global/suffix configuration setting.
--rows Overrides report/columns_as_rows configuration
setting.
--separator
Overrides report/separator configuration setting.
--units
Overrides global/units configuration setting.
--unquoted
Overrides report/quoted configuration setting.
Special options
--configreport ReportName
This defines the ReportName for which any subsequent
-o|--columns, -O|--sort or -S|--select applies to.
See also Main report specifics and Log report
specifics for possible ReportName values.
--logonly
When an LVM command contains both main report and
log report, this option suppresses the main report
output and it causes the log report output to be
displayed only.
--unbuffered
Overrides report/buffered configuration setting.
The FieldSet mentioned in the lists above is a set of field names
where each field name is delimited by "," character. Field set
definition, sorting and selection may be repeated on command line
(-o+/-o- includes/excludes fields to/from current list, for all
the other repeatable options, the last value typed for the option
on the command line is used). The Selection is a string with se‐
lection criteria, see also Selection paragraph below for more in‐
formation about constructing these criteria.
Main report specifics
The main report currently encompasses these distinct subtypes,
referenced by their name – ReportName as listed below. The com‐
mand in parenthesis is representative command that uses the main
report subtype by default. Each subtype has its own configuration
setting for global field set definition as well as sort field def‐
inition (listed below each individual ReportName):
pv representing report about Physical Volumes (pvs)
– report/pvs_cols
– report/pvs_sort
pvseg representing report about Physical Volume Segments
(pvs --segments)
– report/pvseg_cols
– report/pvseg_sort
vg representing report about Volume Groups (vgs)
– report/vgs_cols
– report/vgs_sort
lv representing report about Logical Volumes (lvs)
– report/lvs_cols
– report/lvs_sort
seg representing report about Logical Volume Segments
(lvs --segments)
– report/segs_cols
– report/segs_sort
full representing report combining all of the above as a
whole (lvm fullreport)
– report/pvs_cols_full
– report/pvs_sort_full
– report/pvsegs_cols_full
– report/pvseg_sort_full
– report/vgs_cols_full
– report/vgs_sort_full
– report/lvs_cols_full
– report/lvs_sort_full
– report/segs_cols_full
– report/segs_sort_full
devtype
representing report about device types
(lvm devtypes)
– report/devtypes_cols
– report/devtypes_sort
Use pvs, vgs, lvs -o help or lvm devtypes -o help to get complete
list of fields that you can use for main report. The list of
fields in the help output is separated in groups based on which
report type they belong to. Note that LVM can change final report
type used if fields from different groups are combined together.
Some of these combinations are not allowed in which case LVM will
issue an error.
For all main report subtypes except full, it's not necessary to
use --configreport ReportName to denote which report any subse‐
quent -o, -O or -S option applies to as they always apply to the
single main report type. Currently, lvm fullreport is the only
command that includes more than one main report subtype. There‐
fore, the --configreport is particularly suitable for the full re‐
port if you need to configure each of its subreports in a differ‐
ent way.
Log report specifics
You can enable log report with log/report_command_log configura‐
tion setting – this functionality is disabled by default. The log
report contains a log collected during LVM command execution and
then the log is displayed just like any other report known from
main report. There is only one log report subtype as shown below
together with related configuration settings for fields, sorting
and selection:
log representing log report
– log/command_log_cols
– log/command_log_sort
– log/command_log_selection
You always need to use --configreport log together with -o|--op‐
tions, -O|--sort or -S|--selection to override configuration set‐
tings directly on command line for log report. When compared to
main report, in addition to usual configuration settings for re‐
port fields and sorting, the log report has also configuration op‐
tion for selection - report/command_log_selection. This configura‐
tion setting is provided for convenience so it's not necessary to
use -S|--select on command line each time an LVM command is exe‐
cuted and we need the same selection criteria to be applied for
log report. Default selection criteria used for log report are
log/command_log_selection="!(log_type=status && message=success)".
This means that, by default, log report doesn't display status
messages about successful operation and it displays only rows with
error, warning, print-type messages and messages about failure
states. To see unfiltered command log, use "all" value for the se‐
lection. For more information, see log report content below.
Log report coverage
Currently, when running LVM commands directly (not in LVM shell),
the log report covers command's processing stage which is the mo‐
ment when LVM entities are iterated and processed one by one. It
does not cover any command initialization nor command finalization
stage. If there is any message issued out of log report's coverage
range, such message goes directly to output, bypassing the log re‐
port. By default, that is standard error output for error and
warning messages and standard output for common print-like mes‐
sages.
When running LVM commands in LVM shell, the log report covers the
whole LVM command's execution, including command's processing as
well as initialization and finalization stage. So from this point
of view, the log report coverage is complete for executed LVM com‐
mands. Note that there are still a few moments when LVM shell
needs to initialize itself before it even enters the main loop in
which it executes LVM commands. Also, there is a moment when LVM
shell needs to prepare log report properly for next command exe‐
cuted in the shell and then, after the command's run, the shell
needs to display the log report for that recently executed com‐
mand. If there is a failure or any other message issued during
this time, the LVM will bypass log report and display messages on
output directly.
For these reasons and for completeness, it's not possible to rely
fully on log report as the only indicator of LVM command's status
and the only place where all messages issued during LVM command
execution are collected. You always need to check whether the
command has not failed out of log report's range by checking the
non-report output too.
To help with this, LVM can separate output which you can then
redirect to any custom file descriptor that you prepare before
running an LVM command or LVM shell and then you make LVM to use
these file descriptors for different kinds of output by defining
environment variables with file descriptor numbers. See also
LVM_OUT_FD, LVM_ERR_FD and LVM_REPORT_FD environment variable de‐
scription in lvm(8) man page.
Also note that, by default, reports use the same file descriptor
as common print-like messages, which is standard output. If you
plan to use log report in your scripts or any external tool, you
should use LVM_OUT_FD, LVM_ERR_FD and LVM_REPORT_FD to separate
all output types to different file descriptors. For example, with
bash, that would be:
LVM_OUT_FD=3 LVM_ERR_FD=4 LVM_REPORT_FD=5 <lvm command>
3>out_file 4>err_file 5>report_file
Where the <lvm_command> is either direct LVM command or LVM shell.
You can collect all three types of output in particular files
then.
Log report content
Each item in the log report consists of these set of fields pro‐
viding various information:
Basic information (mandatory):
log_seq_num
Item sequence number. The sequence number is unique
for each log item and it increases in the order of
the log items as they appeared during LVM command
execution.
log_type
Type of log for the item. Currently, these types are
used:
status for any status information that is logged
print for any common message printed while the log
is collected
error for any error message printed while the log
is collected
warn for any warning message printed while the log
is collected
log_context
Context of the log for the item. Currently, two con‐
texts are identified:
shell for the log collected in the outermost code
before and after executing concrete LVM com‐
mands
processing
for the log collected while processing LVM
entities during LVM command execution
Message (mandatory):
log_message
Any message associated with current item. For status
log type, the message contains either success or
failure denoting current state. For print, error and
warn log types, the message contains the exact mes‐
sage of that type that got issued.
Object information (used only if applicable):
log_object_type field
Type of the object processed. Currently, these ob‐
ject types are recognized:
cmd for command as a whole
orphan for processing group of PVs not in any VG yet
pv for PV processing
label for direct PV label processing (without VG
metadata)
vg for VG processing
lv for LV processing
log_object_name
Name of the object processed.
log_object_id
ID of the object processed.
log_object_group
A group where the processed object belongs to.
log_object_group_id
An ID of a group where the processed object belongs
to.
Numeric status (used only if applicable):
log_errno
Error number associated with current item.
log_ret_code
Return code associated with current item.
You can also run lvm --configreport log -o help to display com‐
plete list of fields that you may use for the log report.
Selection
Selection is used for a report to display only rows that match se‐
lection criteria. All rows are displayed with the additional se‐
lected field (-o selected) displaying 1 if the row matches the Se‐
lection and 0 otherwise. The selection criteria are a set of
statements combined by logical and grouping operators. The state‐
ment consists of a field name for which a set of valid values is
defined using comparison operators. For complete list of fields
names that you can use in selection, see the output of lvm -S
help. The help output also contains type of values that each field
displays enclosed in brackets.
List of operators recognized in selection criteria
Comparison operators (cmp_op)
=~ matching regular expression.
!~ not matching regular expression.
= equal to.
!= not equal to.
>= greater than or equal to.
> greater than
<= less than or equal to.
< less than.
Binary logical operators (log_op)
&& all fields must match
, all fields must match
|| at least one field must match
# at least one field must match
Unary logical operators
! logical negation
Grouping operators
( left parenthesis
) right parenthesis
[ list start
] list end
{ list subset start
} list subset end
Field types and selection operands
Field type restricts the set of operators and values that you may
use with the field when defining selection criteria. You can see
field type for each field if you run lvm -S help where you can
find the type name enclosed in square brackets. Currently, LVM
recognizes these field types in reports:
string for set of characters (for each string field type,
you can use either string or regular expression –
regex for the value used in selection criteria)
string list
for set of strings
number for integer value
size for integer or floating point number with size unit
suffix (see also lvcreate(8) man page and
description for "-L|--size" option for the list of
recognized suffixes)
percent
for floating point number with or without "%" suffix
(e.g. 50 or 50%)
time for time values
When using string list in selection criteria, there are several
ways how LVM can match string list fields from report, depending
on what list grouping operator is used and what item separator is
used within that set of items. Also, note that order of items does
not matter here.
• Matching all items in the string list field:
– and all items from selection, use [ ] with "," (or "&&"),
.e.g. ["a","b","c"],
– and any item from selection, use [ ] with "#" (or "||"),
.e.g. ["a"#"b"#"c"].
• Matching a subset of items in the string list field:
– and all items from selection, use { } with "," (or "&&"),
e.g. {"a","b","c"},
– and any item from selection, use { } with "#" (or "||"),
e.g. {"a"#"b"#"c"}.
When using time in your selection criteria, LVM can recognize
various time formats using standard, absolute or freeform
expressions. For examples demonstrating time expressions in
selection criteria, see EXAMPLES section.
• Standard time format
– date
YYYY-MM-DD
YYYY-MM, auto DD=1
YYYY, auto MM=01 and DD=01
– time
hh:mm:ss
hh:mm, auto ss=0
hh, auto mm=0, auto ss=0
– timezone
+hh:mm or -hh:mm
+hh or -hh
The full date/time specification is YYYY-MM-DD hh:mm:ss. Users
are able to leave date/time parts from right to left. Whenever
these parts are left out, a range is assumed automatically with
second granularity. For example:
"2015-07-07 9:51"
means range of "2015-07-07 9:51:00" –
"2015-07-07 9:51:59"
"2015-07"
means range of "2015-07-01 0:00:00" –
"2015-07-31 23:59:59"
"2015"
means range of "2015-01-01 0:00:00" –
"2015-12-31 23:59:59"
• Absolute time format
Absolute time is defined as number of seconds since the Epoch
(1970:01:01 00:00 +00:00).
– @seconds
• Freeform time format
– weekday names ("Sunday" – "Saturday" or abbreviated as "Sun"
– "Sat")
– labels for points in time ("noon", "midnight")
– labels for a day relative to current day ("today",
"yesterday")
– points back in time with relative offset from today (N is a
number)
"N" "seconds" / "minutes" / "hours" / "days" /
"weeks" / "years" "ago"
"N" "secs" / "mins" / "hrs" ... "ago"
"N" "s" / "m" / "h" ... "ago"
– time specification either in hh:mm:ss format or with AM/PM
suffixes
– month names ("January" – "December" or abbreviated as "Jan"
– "Dec")
Informal grammar specification
– STATEMENT = column cmp_op VALUE | STATEMENT log_op STATEMENT |
(STATEMENT) | !(STATEMENT)
– VALUE = [VALUE log_op VALUE]
For list-based types: string list. Matches all items in list.
The log_op must always be of one type within the whole list
value.
– VALUE = {VALUE log_op VALUE}
For list-based types: string list. Matches a subset of items in
list. The log_op must always be of one type within the whole
list value.
– VALUE = value
For scalar types: number, size, percent, string (or string
regex). Also for list-based types: string list (in this case
the value is a short form of {value}).
Basic usage
We start our examples with default configuration – lvmconfig(8) is
helpful command to display configuration settings which are
currently used, including all configuration related to reporting.
We will use it throughout examples below to display current
configuration.
# lvmconfig --type full global/units global/suffix \
report/output_format report/compact_output \
report/compact_output_cols report/aligned \
report/headings report/separator \
report/list_item_separator report/prefixes \
report/quoted report/columns_as_rows \
report/binary_values_as_numeric report/time_format \
report/mark_hidden_devices report/two_word_unknown_device \
report/buffered
units="h"
suffix=1
output_format="basic"
compact_output=0
compact_output_cols=""
aligned=1
headings=1
separator=" "
list_item_separator=","
prefixes=0
quoted=1
columns_as_rows=0
binary_values_as_numeric=0
time_format="%Y-%m-%d %T %z"
mark_hidden_devices=1
two_word_unknown_device=0
buffered=1
Also, we start with simple LVM layout with two PVs (/dev/sda,
/dev/sdb), VG (vg) and two LVs (lvol0 and lvol1) in the VG. We
display all possible reports as single commands here, see also
pvs(8), vgs(8), lvs(8) man pages for more information. The field
set for each report type is configured with configuration settings
as we already mentioned in main report specifics section in this
man page.
# lvmconfig --type full report/pvs_cols report/pvs_sort \
report/pvsegs_cols report/pvsegs_sort report/vgs_cols \
report/vgs_sort report/lvs_cols report/lvs_sort \
report/segs_cols report/segs_sort
pvs_cols="pv_name,vg_name,pv_fmt,pv_attr,pv_size,pv_free"
pvs_sort="pv_name"
pvsegs_cols="pv_name,vg_name,pv_fmt,pv_attr,pv_size,pv_free,
pvseg_start,pvseg_size"
pvsegs_sort="pv_name,pvseg_start"
vgs_cols="vg_name,pv_count,lv_count,snap_count,vg_attr,vg_size,vg_free"
vgs_sort="vg_name"
lvs_cols="lv_name,vg_name,lv_attr,lv_size,pool_lv,origin,move_pv,
mirror_log,copy_percent,convert_lv"
lvs_sort="vg_name,lv_name"
segs_cols="lv_name,vg_name,lv_attr,stripes,segtype,seg_size"
segs_sort="vg_name,lv_name,seg_start"
# pvs
PV VG Fmt Attr PSize PFree
/dev/sda vg lvm2 a-- 100.00m 88.00m
/dev/sdb vg lvm2 a-- 100.00m 92.00m
# pvs --segments
PV VG Fmt Attr PSize PFree Start SSize
/dev/sda vg lvm2 a-- 100.00m 88.00m 0 1
/dev/sda vg lvm2 a-- 100.00m 88.00m 1 1
/dev/sda vg lvm2 a-- 100.00m 88.00m 2 1
/dev/sda vg lvm2 a-- 100.00m 88.00m 3 22
/dev/sdb vg lvm2 a-- 100.00m 92.00m 0 1
/dev/sdb vg lvm2 a-- 100.00m 92.00m 1 1
/dev/sdb vg lvm2 a-- 100.00m 92.00m 2 23
# vgs
VG #PV #LV #SN Attr VSize VFree
vg 2 2 0 wz--n- 200.00m 180.00m
# lvs
LV VG Attr LSize Pool Origin Move Log Cpy%Sync Convert
lvol0 vg -wi-a----- 4.00m
lvol1 vg rwi-a-r--- 4.00m 100.00
# lvs --segments
LV VG Attr #Str Type SSize
lvol0 vg -wi-a----- 1 linear 4.00m
lvol1 vg rwi-a-r--- 2 raid1 4.00m
We will use report/lvs_cols and report/lvs_sort configuration
settings to define our own list of fields to use and to sort by
that is different from defaults. You can do this for other reports
in same manner with report/{pvs,pvseg,vgs,seg}_{cols,sort}
configuration settings. Also note that in the example below, we
don't display the "lv_time" field even though we're using it for
sorting – this is allowed.
# lvmconfig --type full report/lvs_cols report/lvs_sort
lvs_cols="lv_name,lv_size,origin,pool_lv,copy_percent"
lvs_sort="-lv_time"
# lvs
LV LSize Origin Pool Cpy%Sync
lvol1 4.00m 100.00
lvol0 4.00m
You can use -o|--options command line option to override current
configuration directly on command line.
# lvs -o lv_name,lv_size
LV LSize
lvol1 4.00m
lvol0 4.00m
# lvs -o+lv_layout
LV LSize Origin Pool Cpy%Sync Layout
lvol1 4.00m 100.00 raid,raid1
lvol0 4.00m linear
# lvs -o-origin
LV LSize Pool Cpy%Sync
lvol1 4.00m 100.00
lvol0 4.00m
# lvs -o lv_name,lv_size,origin -o+lv_layout -o-origin -O lv_name
LV LSize Layout
lvol0 4.00m linear
lvol1 4.00m raid,raid1
You can obtain the same information with single command where all
the information about PVs, PV segments, LVs and LV segments are
obtained per VG under a single VG lock for consistency, see also
lvm fullreport(8) man page for more information. The fullreport
has its own configuration settings to define field sets to use,
similar to individual reports as displayed above, but
configuration settings have "_full" suffix now. This way, it's
possible to configure different sets of fields to display and to
sort by for individual reports as well as the full report.
# lvmconfig --type full report/pvs_cols_full \
report/pvs_sort_full report/pvsegs_cols_full \
report/pvsegs_sort_full report/vgs_cols_full \
report/vgs_sort_full report/lvs_cols_full \
report/lvs_sort_full report/segs_cols_full \
report/segs_sort_full
pvs_cols_full="pv_name,vg_name"
pvs_sort_full="pv_name"
pvsegs_cols_full="pv_name,pvseg_start,pvseg_size"
pvsegs_sort_full="pv_uuid,pvseg_start"
vgs_cols_full="vg_name"
vgs_sort_full="vg_name"
lvs_cols_full="lv_name,vg_name"
lvs_sort_full="vg_name,lv_name"
segs_cols_full="lv_name,seg_start,seg_size"
segs_sort_full="lv_uuid,seg_start"
# lvm fullreport
VG
vg
PV VG
/dev/sda vg
/dev/sdb vg
LV VG
lvol0 vg
lvol1 vg
PV Start SSize
/dev/sda 0 1
/dev/sda 1 1
/dev/sda 2 1
/dev/sda 3 22
/dev/sdb 0 1
/dev/sdb 1 1
/dev/sdb 2 23
LV Start SSize
lvol0 0 4.00m
lvol1 0 4.00m
Automatic output compaction
If you look at the lvs output above, you can see that the report
also contains fields for which there is no information to display
(e.g. the columns under "Origin" and "Pool" heading – the "origin"
and "pool_lv" fields). LVM can automatically compact report output
so such fields are not included in final output. To enable this
feature and to compact all fields, use report/compact_output=1 in
your configuration.
# lvmconfig --type full report/compact_output
compact_output=1
# lvs
LV LSize Cpy%Sync
lvol1 4.00m 100.00
lvol0 4.00m
# lvs vg/lvol0
LV LSize
lvol0 4.00m
Alternatively, you can define which fields should be compacted by
configuring report/compact_output_cols configuration setting (or
-o|--options # command line option).
# lvmconfig --type full report/compact_output report/compact_output_cols
compact_output=0
compact_output_cols="origin"
# lvs
LV LSize Pool Cpy%Sync
lvol1 4.00m 100.00
lvol0 4.00m
# lvs vg/lvol0
LV LSize Pool
lvol0 4.00m
# lvs -o#pool_lv
LV LSize Origin Cpy%Sync
lvol1 4.00m 100.00
lvol0 4.00m
We will use report/compact_output=1 for subsequent examples.
Further formatting options
By default, LVM displays sizes in reports in human-readable form
which means that the most suitable unit is used so it's easy to
read. You can use report/units configuration setting (or --units
option directly on command line) and report/suffix configuration
setting (or --nosuffix command line option) to change this.
# lvs --units b --nosuffix
LV LSize Cpy%Sync
lvol1 4194304 100.00
lvol0 4194304
If you want to configure whether report headings are displayed or
not, use report/headings configuration settings (or --noheadings
command line option).
# lvs --noheadings
lvol1 4.00m 100.00
lvol0 4.00m
In some cases, it may be useful to display report content as
key=value pairs where key here is actually the field name. Use
report/prefixes configuration setting (or --nameprefixes command
line option) to switch between standard output and the key=value
output. The key=value pair is the output that is suitable for use
in scripts and for other tools to parse easily. Usually, you also
don't want to display headings with the output that has these
key=value pairs.
# lvs --noheadings --nameprefixes
LVM2_LV_NAME='lvol1' LVM2_LV_SIZE='4.00m' LVM2_COPY_PERCENT='100.00'
LVM2_LV_NAME='lvol0' LVM2_LV_SIZE='4.00m' LVM2_COPY_PERCENT=''
To define whether quotation marks in key=value pairs should be
used or not, use report/quoted configuration setting (or
--unquoted command line option).
# lvs --noheadings --nameprefixes --unquoted
LVM2_LV_NAME=lvol1 LVM2_LV_SIZE=4.00m LVM2_COPY_PERCENT=100.00
LVM2_LV_NAME=lvol0 LVM2_LV_SIZE=4.00m LVM2_COPY_PERCENT=
For easier parsing, you can even transpose the report so each
column now becomes a row in the output. This is done with
report/output_as_rows configuration setting (or --rows command
line option).
# lvs --noheadings --nameprefixes --unquoted --rows
LVM2_LV_NAME=lvol1 LVM2_LV_NAME=lvol0
LVM2_LV_SIZE=4.00m LVM2_LV_SIZE=4.00m
LVM2_COPY_PERCENT=100.00 LVM2_COPY_PERCENT=
Use report/separator configuration setting (or --separator command
line option) to define your own field separator to use.
# lvs --noheadings --nameprefixes --unquoted --separator " | "
LVM2_LV_NAME=lvol1 | LVM2_LV_SIZE=4.00m | LVM2_COPY_PERCENT=100.00
LVM2_LV_NAME=lvol0 | LVM2_LV_SIZE=4.00m | LVM2_COPY_PERCENT=
If you are using your own separator, the columns in the output are
not aligned by default. Use report/aligned configuration setting
(or --aligned command line option) for LVM to add extra spaces in
report to align the output properly.
# lvs --separator " | "
LV | LSize | Cpy%Sync
lvol1 | 4.00m | 100.00
lvol0 | 4.00m |
# lvs --separator " | " --aligned
LV | LSize | Cpy%Sync
lvol1 | 4.00m | 100.00
lvol0 | 4.00m |
Let's display one more field in addition ("lv_tags" in this
example) for the lvs report output.
# lvs -o+lv_tags
LV LSize Cpy%Sync LV Tags
lvol1 4.00m 100.00
lvol0 4.00m tagA,tagB
The "LV Tags" column in the example above displays two list
values, separated by "," character for LV lvol0. If you need
different list item separator, use report/list_item_separator
configuration setting its definition.
# lvmconfig --type full report/list_item_separator
list_item_separator=";"
# lvs -o+tags
LV LSize Cpy%Sync LV Tags
lvol1 4.00m 100.00
lvol0 4.00m tagA;tagB
But let's still use the original "," character for
list_item_separator for subsequent examples.
Format for any of time values displayed in reports can be
configured with report/time_format configuration setting. By
default complete date and time is displayed, including timezone.
# lvmconfig --type full report/time_format
time_format="%Y-%m-%d %T %z"
# lvs -o+time
LV LSize Cpy%Sync CTime
lvol1 4.00m 100.00 2016-08-29 12:53:36 +0200
lvol0 4.00m 2016-08-29 10:15:17 +0200
We can change time format in similar way as we do when using
date(1) command or strftime(3) function (lvmconfig --type default
--withcomments report/time_format will give you complete list of
available formatting options). In the example below, we decided to
use %s for number of seconds since Epoch (1970-01-01 UTC).
# lvmconfig --type full report/time_format
time_format="%s"
# lvs
LV Attr LSize Cpy%Sync LV Tags CTime
lvol1 rwi-a-r--- 4.00m 100.00 1472468016
lvol0 -wi-a----- 4.00m tagA,tagB 1472458517
The lvs does not display hidden LVs by default – to include these
LVs in the output, you need to use -a|--all command line option.
Names for these hidden LVs are displayed within square brackets.
# lvs -a
LV LSize Cpy%Sync
lvol1 4.00m 100.00
[lvol1_rimage_0] 4.00m
[lvol1_rmeta_0] 4.00m
[lvol1_rimage_1] 4.00m
[lvol1_rmeta_1] 4.00m
lvol0 4.00m
You can configure LVM to display the square brackets for hidden
LVs or not with report/mark_hidden_devices configuration setting.
# lvmconfig --type full report/mark_hidden_devices
mark_hidden_devices=0
# lvs -a
LV LSize Cpy%Sync
lvol1 4.00m 100.00
lvol1_rimage_0 4.00m
lvol1_rmeta_0 4.00m
lvol1_rimage_1 4.00m
lvol1_rmeta_1 4.00m
lvol0 4.00m
It's not recommended to use LV marks for hidden devices to decide
whether the LV is the one to use by end users or not. Please, use
"lv_role" field instead which can report whether the LV is
"public" or "private". The private LVs are used by LVM only and
they should not be accessed directly by end users.
# lvs -a -o+lv_role
LV LSize Cpy%Sync Role
lvol1 4.00m 100.00 public
lvol1_rimage_0 4.00m private,raid,image
lvol1_rmeta_0 4.00m private,raid,metadata
lvol1_rimage_1 4.00m private,raid,image
lvol1_rmeta_1 4.00m private,raid,metadata
lvol0 4.00m public
Some of the reporting fields that LVM reports are of binary
nature. For such fields, it's either possible to display word
representation of the value (this is used by default) or numeric
value (0/1 or -1 in case the value is undefined).
# lvs -o+lv_active_locally
LV LSize Cpy%Sync ActLocal
lvol1 4.00m 100.00 active locally
lvol0 4.00m active locally
We can change the way how these binary values are displayed with
report/binary_values_as_numeric configuration setting.
# lvmconfig --type full report/binary_values_as_numeric
binary_values_as_numeric=1
# lvs -o+lv_active_locally
LV LSize Cpy%Sync ActLocal
lvol1 4.00m 100.00 1
lvol0 4.00m 1
In certain cases, you may find it more useful to report full
column names instead of abbreviated column names in report
headings. To do this, use report/headings=2 configuration setting
(or --headings full or --headings 2 command line option). The full
column names are the exact names that you also use in FieldSet for
-o|--options. These names are unambiguous, without spaces (one
word only) and they also make it easier to match the output with
requested FieldSet:
# lvs -o+seg_start,seg_start_pe
LV VG LSize Cpy%Sync Start Start
lvol0 vg 4.00m 0 0
lvol1 vg 4.00m 100.00 0 0
# lvs --headings full -o+seg_start,seg_start_pe
lv_name vg_name lv_size copy_percent seg_start seg_start_pe
lvol0 vg 4.00m 0 0
lvol1 vg 4.00m 100.00 0 0
Changing output format
LVM can output reports in different formats – use
report/output_format configuration setting (or --reportformat
command line option) to switch the report output format.
Currently, LVM supports these output formats:
– "basic" (all the examples we used above used this
format),
– "json",
– "json_std".
For example:
# lvs -o lv_name,lv_size --reportformat json
{
"report": [
{
"lv": [
{"lv_name":"lvol1", "lv_size":"4.00m"},
{"lv_name":"lvol0", "lv_size":"4.00m"}
]
}
]
}
The json_std output format is more compliant with JSON standard
and compared to the original json format:
– it does not use double quotes around numeric values,
– numeric values are always expressed as numbers, not reserved
strings representing them (this also means that
report/binary_values_as_numeric=1 setting is forced)
– it uses 'null' for undefined numeric values,
– it prints string list as proper JSON array of strings instead of
a single string.
Note that some configuration settings and command line options
have no effect with certain report formats. For example, with json
or json_std output, it doesn't have any meaning to use
report/aligned (--aligned), report/noheadings (--noheadings),
report/columns_as_rows (--rows) or report/buffered (--unbuffered).
All these configuration settings and command line options are
ignored if using the json or json_std report output format.
Selection
If you need to select only specific rows from report, you can use
LVM's report selection feature. If you call lvm -S help, you'll
get quick help on selection. The help contains list of all fields
that LVM can use in reports together with its type enclosed in
square brackets. The example below contains a line from lvs -S
help.
# lvs -S help
...
lv_size - Size of LV in current units. [size]
...
This line tells you that the "lv_size" field is of "size" type. If
you look at the bottom of the help output, you can see section
about "Selection operators" and its "Comparison operators".
# lvs -S help
...
Selection operators
-------------------
Comparison operators:
=~ - Matching regular expression. [regex]
!~ - Not matching regular expression. [regex]
= - Equal to. [number, size, percent, string, string list, time]
!= - Not equal to. [number, size, percent, string, string_list, time]
>= - Greater than or equal to. [number, size, percent, time]
> - Greater than. [number, size, percent, time]
<= - Less than or equal to. [number, size, percent, time]
< - Less than. [number, size, percent, time]
since - Since specified time (same as '>='). [time]
after - After specified time (same as '>'). [time]
until - Until specified time (same as '<='). [time]
before - Before specified time (same as '<'). [time]
...
Here you can match comparison operators that you may use with the
"lv_size" field which is of type "size" – it's =, !=, >=, >, <=
and <. You can find applicable comparison operators for other
fields and other field types the same way.
To demonstrate selection functionality in LVM, we will create more
LVs in addition to lvol0 and lvol1 we used in our previous
examples.
# lvs -o name,size,origin,snap_percent,tags,time
LV LSize Origin Snap% LV Tags CTime
lvol4 4.00m lvol2 24.61 2016-09-09 16:57:44 +0200
lvol3 4.00m lvol2 5.08 2016-09-09 16:56:48 +0200
lvol2 8.00m tagA,tagC,tagD 2016-09-09 16:55:12 +0200
lvol1 4.00m 2016-08-29 12:53:36 +0200
lvol0 4.00m tagA,tagB 2016-08-29 10:15:17 +0200
When selecting size and percent fields, we don't need to use
units. For sizes, default "m" (for MiB) is used – this is the
same behaviour as already used for LVM commands when specifying
sizes (e.g. lvcreate -L). For percent fields, "%" is assumed
automatically if it's not specified. The example below also
demonstrates how several criteria can be combined together.
# lvs -o name,size,snap_percent -S 'size=8m'
LV LSize
lvol2 8.00m
# lvs -o name,size,snap_percent -S 'size=8'
LV LSize
lvol2 8.00m
# lvs -o name,size,snap_percent -S 'size < 5000k'
LV LSize Snap%
lvol4 4.00m 24.61
lvol3 4.00m 5.08
lvol1 4.00m
lvol0 4.00m
# lvs -o name,size,snap_percent -S 'size < 5000k && snap_percent > 20'
LV LSize Snap%
lvol4 4.00m 24.61
# lvs -o name,size,snap_percent \
-S '(size < 5000k && snap_percent > 20%) || name=lvol2'
LV LSize Snap%
lvol4 4.00m 24.61
lvol2 8.00m
You can also use selection together with processing-oriented
commands.
# lvchange --addtag test -S 'size < 5000k'
Logical volume vg/lvol1 changed.
Logical volume vg/lvol0 changed.
Logical volume vg/lvol3 changed.
Logical volume vg/lvol4 changed.
# lvchange --deltag test -S 'tags = test'
Logical volume vg/lvol1 changed.
Logical volume vg/lvol0 changed.
Logical volume vg/lvol3 changed.
Logical volume vg/lvol4 changed.
LVM can recognize more complex values used in selection criteria
for string list and time field types. For string lists, you can
match whole list strictly, its subset or intersection. Let's take
"lv_tags" field as an example – we select only rows which contain
"tagA" within tags field. We're using { } to denote that we're
interested in subset that matches. If the subset has only one
item, we can leave out { }.
# lvs -o name,tags -S 'tags={tagA}'
LV LV Tags
lvol2 tagA,tagC,tagD
lvol0 tagA,tagB
# lvs -o name,tags -S 'tags=tagA'
LV LV Tags
lvol2 tagA,tagC,tagD
lvol0 tagA,tagB
For string list values, we can either match all items in the
string list value (by using [ ]) or only a subset of items in the
string list value (by using { }). Further, we can either match if
all items in the string list selection criterion match (by using
"," or "&&" as item delimiter) or if only a subset of items in the
string list selection criterion match (by using "#" or "||" as
item delimiter).
# lvs -o name,tags -S 'tags={tagA}'
LV LV Tags
lvol0 tagA,tagB
lvol2 tagA,tagC,tagD
# lvs -o name,tags -S 'tags={tagA || tagB}'
LV LV Tags
lvol0 tagA,tagB
lvol2 tagA,tagC,tagD
# lvs -o name,tags -S 'tags={tagA && tagB}'
LV LV Tags
lvol0 tagA,tagB
# lvs -o name,tags -S 'tags={tagA || tagB || tagC}'
LV LV Tags
lvol0 tagA,tagB
lvol2 tagA,tagC,tagD
# lvs -o name,tags -S 'tags={tagA && tagB && tagC}'
# lvs -o name,tags -S 'tags=[tagA]'
# lvs -o name,tags -S 'tags=[tagA || tagB]'
LV LV Tags
lvol0 tagA,tagB
# lvs -o name,tags -S 'tags=[tagA && tagB]'
LV LV Tags
lvol0 tagA,tagB
# lvs -o name,tags -S 'tags=[tagA || tagB || tagC]'
LV LV Tags
lvol0 tagA,tagB
# lvs -o name,tags -S 'tags=[tagA && tagB && tagC]'
You can also use regular expressions instead of simple strings
inside the string list selection criteria. In that case, the "=~"
operator is used instead of "=". The string list grouping
operators { } and [ ] are also recognized.
# lvs -o name,tags -S 'tags=~^t.*[ACD]$'
LV LV Tags
lvol0 tagA,tagB
lvol2 tagA,tagC,tagD
# lvs -o name,tags -S 'tags=~{"^t.*[ACD]$"}'
LV LV Tags
lvol0 tagA,tagB
lvol2 tagA,tagC,tagD
# lvs -o name,tags -S 'tags=~["^t.*[ACD]$"]'
LV LV Tags
lvol2 tagA,tagC,tagD
# lvs -o name,tags -S 'tags=~{"^t.*[AC]$" || "^tag[D]$" }'
LV LV Tags
lvol0 tagA,tagB
lvol2 tagA,tagC,tagD
# lvs -o name,tags -S 'tags=~["^t.*[AC]$" || "^tag[D]$" ]'
LV LV Tags
lvol2 tagA,tagC,tagD
# lvs -o name,tags -S 'tags=~["^t.*A$" && "^t.*B$" ]'
LV LV Tags
lvol0 tagA,tagB
# lvs -o name,tags -S 'tags!~["^t.*A$" && "^t.*B$" ]'
LV LV Tags
lvol1
lvol2 tagA,tagC,tagD
lvol3
lvol4
To match a set with no items, use "" to denote this (note that we
have output compaction enabled so the "LV Tags" column is not
displayed in the example below because it's blank and so it gets
compacted).
# lvs -o name,tags -S 'tags=""'
LV
lvol4
lvol3
lvol1
# lvs -o name,tags -S 'tags!=""'
LV LV Tags
lvol2 tagA,tagC,tagD
lvol0 tagA,tagB
When doing selection based on time fields, we can use either
standard, absolute or freeform time expressions in selection
criteria. Examples below are using standard forms.
# lvs -o name,time
LV CTime
lvol4 2016-09-09 16:57:44 +0200
lvol3 2016-09-09 16:56:48 +0200
lvol2 2016-09-09 16:55:12 +0200
lvol1 2016-08-29 12:53:36 +0200
lvol0 2016-08-29 10:15:17 +0200
# lvs -o name,time -S 'time since "2016-09-01"'
LV CTime
lvol4 2016-09-09 16:57:44 +0200
lvol3 2016-09-09 16:56:48 +0200
lvol2 2016-09-09 16:55:12 +0200
# lvs -o name,time -S 'time since "2016-09-09 16:56"'
LV CTime
lvol4 2016-09-09 16:57:44 +0200
lvol3 2016-09-09 16:56:48 +0200
# lvs -o name,time -S 'time since "2016-09-09 16:57:30"'
LV CTime
lvol4 2016-09-09 16:57:44 +0200
# lvs -o name,time \
-S 'time since "2016-08-29" && time until "2016-09-09 16:55:12"'
LV CTime
lvol2 2016-09-09 16:55:12 +0200
lvol1 2016-08-29 12:53:36 +0200
lvol0 2016-08-29 10:15:17 +0200
# lvs -o name,time \
-S 'time since "2016-08-29" && time before "2016-09-09 16:55:12"'
LV CTime
lvol1 2016-08-29 12:53:36 +0200
lvol0 2016-08-29 10:15:17 +0200
Time operators have synonyms: ">=" for since, "<=" for until, ">"
for "after" and "<" for "before".
# lvs -o name,time \
-S 'time >= "2016-08-29" && time <= "2016-09-09 16:55:30"'
LV CTime
lvol2 2016-09-09 16:55:12 +0200
lvol1 2016-08-29 12:53:36 +0200
lvol0 2016-08-29 10:15:17 +0200
# lvs -o name,time \
-S 'time since "2016-08-29" && time < "2016-09-09 16:55:12"'
LV CTime
lvol1 2016-08-29 12:53:36 +0200
lvol0 2016-08-29 10:15:17 +0200
Example below demonstrates using absolute time expression.
# lvs -o name,time --config report/time_format="%s"
LV CTime
lvol4 1473433064
lvol3 1473433008
lvol2 1473432912
lvol1 1472468016
lvol0 1472458517
# lvs -o name,time -S 'time since @1473433008'
LV CTime
lvol4 2016-09-09 16:57:44 +0200
lvol3 2016-09-09 16:56:48 +0200
Examples below demonstrates using freeform time expressions.
# lvs -o name,time -S 'time since "2 weeks ago"'
LV CTime
lvol4 2016-09-09 16:57:44 +0200
lvol3 2016-09-09 16:56:48 +0200
lvol2 2016-09-09 16:55:12 +0200
lvol1 2016-08-29 12:53:36 +0200
lvol0 2016-08-29 10:15:17 +0200
# lvs -o name,time -S 'time since "1 week ago"'
LV CTime
lvol4 2016-09-09 16:57:44 +0200
lvol3 2016-09-09 16:56:48 +0200
lvol2 2016-09-09 16:55:12 +0200
# lvs -o name,time -S 'time since "2 weeks ago"'
LV CTime
lvol1 2016-08-29 12:53:36 +0200
lvol0 2016-08-29 10:15:17 +0200
# lvs -o name,time -S 'time before "1 week ago"'
LV CTime
lvol1 2016-08-29 12:53:36 +0200
lvol0 2016-08-29 10:15:17 +0200
# lvs -o name,time -S 'time since "68 hours ago"'
LV CTime
lvol4 2016-09-09 16:57:44 +0200
lvol3 2016-09-09 16:56:48 +0200
lvol2 2016-09-09 16:55:12 +0200
# lvs -o name,time -S 'time since "1 year 3 months ago"'
LV CTime
lvol4 2016-09-09 16:57:44 +0200
lvol3 2016-09-09 16:56:48 +0200
lvol2 2016-09-09 16:55:12 +0200
lvol1 2016-08-29 12:53:36 +0200
lvol0 2016-08-29 10:15:17 +0200
Command log reporting
As described in categorization based on reporting facility section
at the beginning of this document, both report-oriented and
processing-oriented LVM commands can report the command log if
this is enabled with log/report_command_log configuration setting.
Just like any other report, we can set the set of fields to
display (log/command_log_cols) and to sort by
(log/command_log_sort) for this report.
# lvmconfig --type full log/report_command_log log/command_log_cols \
log/command_log_sort log/command_log_selection
report_command_log=1
command_log_cols="log_seq_num,log_type,log_context,log_object_type,
log_object_name,log_object_group,log_message,
log_errno,log_ret_code"
command_log_sort="log_seq_num"
command_log_selection="!(log_type=status && message=success)"
# lvs
Logical Volume
==============
LV LSize Cpy%Sync
lvol1 4.00m 100.00
lvol0 4.00m
Command Log
===========
Seq LogType Context ObjType ObjName ObjGrp Msg Errno RetCode
As you can see, the command log is empty (it contains only field
names). By default, LVM uses selection on the command log report
and this case no row matched the selection criteria, see also log
report specifics section in this document for more information.
We're displaying complete log report in the example below where we
can see that both LVs lvol0 and lvol1 were successfully processed
as well as the VG vg they are part of.
# lvmconfig --type full log/command_log_selection
command_log_selection="all"
# lvs
Logical Volume
==============
LV LSize Cpy%Sync
lvol1 4.00m 100.00
lvol0 4.00m
Command Log
===========
Seq LogType Context ObjType ObjName ObjGrp Msg Errno RetCode
1 status processing lv lvol0 vg success 0 1
2 status processing lv lvol1 vg success 0 1
3 status processing vg vg success 0 1
# lvchange -an vg/lvol1
Command Log
===========
Seq LogType Context ObjType ObjName ObjGrp Msg Errno RetCode
1 status processing lv lvol1 vg success 0 1
2 status processing vg vg success 0 1
Handling multiple reports per single command
To configure the log report directly on command line, we need to
use --configreport option before we start any -o|--options,
-O|--sort or -S|--select that is targeted for log report.
# lvs -o lv_name,lv_size --configreport log -o log_object_type, \
log_object_name,log_message,log_ret_code
Logical Volume
==============
LV LSize
lvol1 4.00m
lvol0 4.00m
Command Log
===========
ObjType ObjName Msg RetCode
lv lvol0 success 1
lv lvol1 success 1
vg vg success 1
The lvm fullreport, with or without log report, consists of
several reports – the --configreport is also used to target
particular subreport here.
Below is an extended example with lvm fullreport to illustrate
combination of various options. The report output is in JSON
format. Also, we configure "vg", "pvseg", "seg" and "log"
subreport to contain only specified fields. For the "pvseg"
subreport, we're interested only in PV names having "sda" in their
name. For the "log" subreport we're interested only in log lines
related to either "lvol0" object or object having "sda" in its
name. Also, for the log subreport we define ordering to be based
on "log_object_type" field.
# lvm fullreport --reportformat json \
--configreport vg -o vg_name,vg_size \
--configreport pvseg -o pv_name,pvseg_start \
-S 'pv_name=~sda' \
--configreport seg -o lv_name,seg_start \
--configreport log -o log_object_type,log_object_name \
-O log_object_type \
-S 'log_object_name=lvol0 || \
log_object_name=~sda'
{
"report": [
{
"vg": [
{"vg_name":"vg", "vg_size":"200.00m"}
]
,
"pv": [
{"pv_name":"/dev/sda", "vg_name":"vg"},
{"pv_name":"/dev/sdb", "vg_name":"vg"}
]
,
"lv": [
{"lv_name":"lvol0", "vg_name":"vg"},
{"lv_name":"lvol1", "vg_name":"vg"}
]
,
"pvseg": [
{"pv_name":"/dev/sda", "pvseg_start":"0"},
{"pv_name":"/dev/sda", "pvseg_start":"1"},
{"pv_name":"/dev/sda", "pvseg_start":"2"},
{"pv_name":"/dev/sda", "pvseg_start":"3"}
]
,
"seg": [
{"lv_name":"lvol0", "seg_start":"0 "},
{"lv_name":"lvol1", "seg_start":"0 "}
]
}
]
,
"log": [
{"log_object_type":"lv", "log_object_name":"lvol0"},
{"log_object_type":"lv", "log_object_name":"lvol0"},
{"log_object_type":"pv", "log_object_name":"/dev/sda"},
{"log_object_type":"pv", "log_object_name":"/dev/sda"},
]
}
Report extensions for LVM shell
As already stated in log report coverage paragraph under log
report specifics in this documentation, when using LVM shell the
log report coverage is wider. There's also special command
designed to query last command's log report in the LVM shell - the
lastlog command.
The example below illustrates a situation where we called lvs
command. After that, we inspected the log report with the
lastlog, without any selection so all the log report is displayed
on output. Then we called lastlog further, giving various
selection criteria. Then we ran unknown LVM command "abc" for
which the log report displays appropriate failure state.
# lvm
lvm> lvs
Logical Volume
==============
LV LSize Cpy%Sync
lvol1 4.00m 100.00
lvol0 4.00m
Command Log
===========
Seq LogType Context ObjType ObjName ObjGrp Msg Errno RetCode
1 status processing lv lvol0 vg success 0 1
2 status processing lv lvol1 vg success 0 1
3 status processing vg vg success 0 1
4 status shell cmd lvs success 0 1
lvm> lastlog
Command Log
===========
Seq LogType Context ObjType ObjName ObjGrp Msg Errno RetCode
1 status processing lv lvol0 vg success 0 1
2 status processing lv lvol1 vg success 0 1
3 status processing vg vg success 0 1
4 status shell cmd lvs success 0 1
lvm> lastlog -S log_object_type=lv
Command Log
===========
Seq LogType Context ObjType ObjName ObjGrp Msg Errno RetCode
1 status processing lv lvol0 vg success 0 1
2 status processing lv lvol1 vg success 0 1
lvm> lastlog -S log_context=shell
Command Log
===========
Seq LogType Context ObjType ObjName ObjGrp Msg Errno RetCode
4 status shell cmd lvs success 0 1
lvm> abc
Command Log
===========
Seq LogType Context ObjType ObjName ObjGrp Msg →
1 error shell cmd abc No such command 'abc'. Try 'help'.
2 status shell cmd abc failure
→ Errno RetCode
-1 0
-1 2
lvm(8), lvmconfig(8), lvm fullreport(8), lvcreate(8),
lvs(8), pvs(8), vgs(8),
date(1), strftime(3)
This page is part of the lvm2 (Logical Volume Manager 2) project.
Information about the project can be found at
⟨http://www.sourceware.org/lvm2/⟩. If you have a bug report for
this manual page, see ⟨https://github.com/lvmteam/lvm2/issues⟩.
This page was obtained from the project's upstream Git repository
⟨git://sourceware.org/git/lvm2.git⟩ on 2025-08-11. (At that time,
the date of the most recent commit that was found in the
repository was 2025-08-08.) If you discover any rendering
problems in this HTML version of the page, or you believe there is
a better or more up-to-date source for the page, or you have
corrections or improvements to the information in this COLOPHON
(which is not part of the original manual page), send a mail to
[email protected]
Red Hat, Inc. LVM TOOLS 2.03.35(2)-git (2025-07-30) LVMREPORT(7)
Pages that refer to this page: lvchange(8), lvconvert(8), lvcreate(8), lvdisplay(8), lvextend(8), lvm(8), lvmconfig(8), lvmdevices(8), lvmdiskscan(8), lvm-fullreport(8), lvm-lvpoll(8), lvreduce(8), lvremove(8), lvrename(8), lvresize(8), lvs(8), lvscan(8), pvchange(8), pvck(8), pvcreate(8), pvdisplay(8), pvmove(8), pvremove(8), pvresize(8), pvs(8), pvscan(8), vgcfgbackup(8), vgcfgrestore(8), vgchange(8), vgck(8), vgconvert(8), vgcreate(8), vgdisplay(8), vgexport(8), vgextend(8), vgimport(8), vgimportclone(8), vgimportdevices(8), vgmerge(8), vgmknodes(8), vgreduce(8), vgremove(8), vgrename(8), vgs(8), vgscan(8), vgsplit(8)
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