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Add support for active cache LV.
Handle --cachemode args validation during command line processing.
Rework some lvm2 internal to use lvm2 defined CACHE_MODE enums
indepently on libdm defines and use enum around the code instead
of passing and comparing strings.
When there are duplicate devices for a PV, one device
is preferred and chosen to exist in the VG. The other
devices are not used by lvm, but are displayed by pvs
with a new PV attr "d", indicating that they are
unchosen duplicate PVs.
The "duplicate" reporting field is set to "duplicate"
when the PV is an unchosen duplicate, and that field
is blank for the chosen PV.
Support parsing --chunksize option also when converting.
Now user can use cache pool created with i.e. 32K chunksize,
while in caching user can select 512K blocks.
Tool is supposed to validate cache metadata size is big enough
to support such chunk size. Otherwise error is shown.
Continuing with lvconvert style updates.
Minimize usage of '\:' as zero-width break space, since html renderers
do not handle this groff sign well (some of them seems to even render
':' there).
But since we do not want see badly rendered man pages itself, prefer
the 'man visual' appearence over html page generation (man2html should
be actually fixed).
Start to use 'user input option' with Capitals more consistently.
This command option can be used to trigger a D-Bus
notification independent of the usual notifications
that are sent from other commands as an effect of
changes to PV/VG/LV state. If lvm is not built with
dbus notification support or if notify_dbus is disabled
in the config, this command will exit with an error.
Showing 'u' in the pv_attr reporting field is mostly unnecessary because
most PVs are allocatable, and being allocatable implies it is (u)sed,
and this is already obvious from other fields in the default 'pvs'
output like the VG name.
So move the new (u)sed pv_attr from character position 4 to 1, and only
show it in those rare cases when the PV is not (a)llocatable or the
relevant metadata is missing.
(Scripts should not be using pv_attr, but rather pv_allocatable,
pv_exported, pv_missing, pv_in_use etc.)
W: manual-page-warning /usr/share/man/man8/lvm.8.gz 491: warning: macro `_cdata',' not defined
rpmlint actually notices we had few hidden word in man page.
the line cannot start with apostrophe as it has then a different
meaning.
Just for convenience to display all new configuration settings
introduced since given version (before, there was only --atversion
to display settings introduced in concrete version).
For example:
$ lvmconfig --type new --sinceversion 2.2.120
allocation {
# cache_mode="writethrough"
# cache_settings {
# }
}
global {
use_lvmlockd=0
# lvmlockd_lock_retries=3
# sanlock_lv_extend=256
use_lvmpolld=1
}
activation {
}
# report {
# compact_output_cols=""
# time_format="%Y-%m-%d %T %z"
# }
local {
# host_id=0
}
Correct some things, e.g. set mode and policy on
the cache lv, not the pool, lvm.conf field for
mode changed.
Add smq which was missing.
Make the sections on cache mode and cache policy
consistent in structure and style.
We want most of our units to be started before any local/remote mount
points are mounted - we used {local,remote}-fs.target for this purpose
before, but it was not 100% correct as there's even {local,remote}-fs-pre.target
special systemd unit reserved for this exact purpose.
See also man 7 systemd.special and "local-fs-pre.target"/"remote-fs-pre.target"
description.
Replace the histogram stats subcommand with a --histogram switch
to enable histogram related fields for both list and report output.
To avoid overloading the existing --histogram rename it to --bounds:
this is also a better description of the option.
Make sure that correct 'dmstats create' messages are shown for all
examples and fix LV examples to use correct dmsetup output name
format (vg/lv -> vg-lv).
Improve the names and labels of stats reports columns, ensure that
the minimum field widths allow unambiguos labels to be shown and
update the man page descriptions of these fields.
Add support to dmstats to create and report histograms.
Add a --histogram switch to 'create' that accepts a string
description of bin boundaries and DR_STATS and DR_STATS_META fields
to report bin configuration and absolute and relative histogram
values:
hist_bins
hist_bounds
hist_ranges
hist_count
hist_count_bounds
hist_count_ranges
hist_percent
hist_percent_bounds
hist_percent_ranges
A new 'histogram' subcommand displays a report that emphasizes
histogram data as either counters or percentage values.
When dmstats is run with -v or higher enable a per-area reporting
mode for statistics regions. This will output one row per area
(rather than one row per region) and adds additional fields of use
when viewing areas:
area_id - index within the region assigned by libdm-stats
area_start - the start location of the area in the containing
device.
Add a pair of fields to expose the current per-interval duation
estimate. The 'interval' field provides a real value in units of
seconds and the 'interval_ns' field provides the same quantity
expressed as a whole number of nanoseconds.
The '--force' switch is only used by dmstats to allow either
creation or deletion of one or more regions on all devices.
These operations do not carry any risk: just a possible mess of
region IDs to be cleaned up.
Remove the use of '--force' for stats commands and change current
uses to a new '--alldevices' switch.
Add the libdm-stats module to libdm: this implements a simple interface
for creating, managing and interrogating I/O statistics regions and
areas on device-mapper devices.
The library interface is documented in libdevmapper.h and provides a
'dm_stats' handle that is used to perform statistics operations and
obtain data.
Public methods are provided to create and destroy handles and to list,
create, and destroy statistics regions as well as to obtain and parse
counter data and calculate rate-based metrics.
This commit also adds a 'dmsetup stats' (aka 'dmstats') command with
'clear', 'create', 'delete', 'list', 'print', and 'report' sub-commands.
See the library documentation and the dmstats.8 manual page for detailed
API and command descriptions.
