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catkin 02-21-2011 03:03 AM

How to reduce LVM messages in /var/log/debug?
 
Hello :)

/var/log/debug gets lots of messages any time an LVM snapshot is setup (lvcreate --size ${size}k --snapshot --name "$LVM_snapshot_device" "$LVM_device"). Here is a recent sample.
Code:

Feb 19 22:40:10 CW8 lvm[2163]: Loading config file: /etc/lvm/lvm.conf
Feb 19 22:40:10 CW8 lvm[2163]: Opened /etc/lvm/lvm.conf RO
Feb 19 22:40:10 CW8 lvm[2163]: Closed /etc/lvm/lvm.conf
Feb 19 22:40:10 CW8 lvm[2163]: Setting log/syslog to 1
Feb 19 22:40:10 CW8 lvm[2163]: Setting log/level to 0
Feb 19 22:40:10 CW8 lvm[2163]: Setting log/verbose to 0
Feb 19 22:40:10 CW8 lvm[2163]: Setting log/indent to 1
Feb 19 22:40:10 CW8 lvm[2163]: Setting global/abort_on_internal_errors to 0
Feb 19 22:40:10 CW8 lvm[2163]: Setting log/prefix to 
Feb 19 22:40:10 CW8 lvm[2163]: Setting log/command_names to 0
Feb 19 22:40:10 CW8 lvm[2163]: Setting global/test to 0
Feb 19 22:40:10 CW8 lvm[2163]: Setting log/overwrite to 0
Feb 19 22:40:10 CW8 lvm[2163]: log/activation not found in config: defaulting to 0
Feb 19 22:40:10 CW8 lvm[2163]: Logging initialised at Sat Feb 19 22:40:10 2011
Feb 19 22:40:10 CW8 lvm[2163]: Setting global/umask to 63
Feb 19 22:40:10 CW8 lvm[2163]: Setting devices/dir to /dev
Feb 19 22:40:10 CW8 lvm[2163]: Setting global/proc to /proc
Feb 19 22:40:10 CW8 lvm[2163]: Setting global/activation to 1
Feb 19 22:40:10 CW8 lvm[2163]: global/suffix not found in config: defaulting to 1
Feb 19 22:40:10 CW8 lvm[2163]: Setting global/units to h
Feb 19 22:40:10 CW8 lvm[2163]: Setting activation/readahead to auto
Feb 19 22:40:10 CW8 lvm[2163]: Setting activation/udev_rules to 1
Feb 19 22:40:10 CW8 lvm[2163]: Setting activation/udev_sync to 1
Feb 19 22:40:10 CW8 lvm[2163]: Setting activation/missing_stripe_filler to error
Feb 19 22:40:10 CW8 lvm[2163]: Setting global/si_unit_consistency to 1
Feb 19 22:40:10 CW8 lvm[2163]: devices/preferred_names not found in config file: using built-in preferences
Feb 19 22:40:10 CW8 lvm[2163]: Matcher built with 3 dfa states
Feb 19 22:40:10 CW8 lvm[2163]: Setting devices/ignore_suspended_devices to 0
Feb 19 22:40:10 CW8 lvm[2163]: Setting devices/cache_dir to /etc/lvm/cache
Feb 19 22:40:10 CW8 lvm[2163]: Setting devices/write_cache_state to 1
Feb 19 22:40:10 CW8 lvm[2163]: Opened /etc/lvm/cache/.cache RO
Feb 19 22:40:10 CW8 lvm[2163]: /dev/CW8/home: Added to device cache
Feb 19 22:40:10 CW8 lvm[2163]: /dev/ram11: Added to device cache
Feb 19 22:40:10 CW8 lvm[2163]: /dev/sda11: Added to device cache
Feb 19 22:40:10 CW8 lvm[2163]: /dev/mapper/CW8-var: Added to device cache
Feb 19 22:40:10 CW8 lvm[2163]: /dev/ram10: Added to device cache
Feb 19 22:40:10 CW8 lvm[2163]: /dev/sda10: Added to device cache
Feb 19 22:40:10 CW8 lvm[2163]: /dev/mapper/CW8-home: Aliased to /dev/CW8/home in device cache
Feb 19 22:40:10 CW8 lvm[2163]: /dev/ram12: Added to device cache
Feb 19 22:40:10 CW8 lvm[2163]: /dev/ram6: Added to device cache
Feb 19 22:40:10 CW8 lvm[2163]: /dev/sda6: Added to device cache
Feb 19 22:40:10 CW8 lvm[2163]: /dev/ram13: Added to device cache
Feb 19 22:40:10 CW8 lvm[2163]: /dev/ram14: Added to device cache
Feb 19 22:40:10 CW8 lvm[2163]: /dev/CW8/var: Aliased to /dev/mapper/CW8-var in device cache (preferred name)
Feb 19 22:40:10 CW8 lvm[2163]: /dev/ram5: Added to device cache
Feb 19 22:40:10 CW8 lvm[2163]: /dev/sda5: Added to device cache
Feb 19 22:40:10 CW8 lvm[2163]: /dev/sdb5: Added to device cache
Feb 19 22:40:10 CW8 lvm[2163]: /dev/CW8/s_var: Added to device cache
Feb 19 22:40:10 CW8 lvm[2163]: /dev/ram1: Added to device cache
Feb 19 22:40:10 CW8 lvm[2163]: /dev/sda1: Added to device cache
Feb 19 22:40:10 CW8 lvm[2163]: /dev/sdb1: Added to device cache
Feb 19 22:40:10 CW8 lvm[2163]: /dev/CW8/srv: Added to device cache
Feb 19 22:40:10 CW8 lvm[2163]: /dev/mapper/CW8-opt: Added to device cache
Feb 19 22:40:10 CW8 lvm[2163]: /dev/ram0: Added to device cache
Feb 19 22:40:10 CW8 lvm[2163]: /dev/mapper/CW8-srv: Aliased to /dev/CW8/srv in device cache
Feb 19 22:40:10 CW8 lvm[2163]: /dev/mapper/CW8-s_var: Aliased to /dev/CW8/s_var in device cache
Feb 19 22:40:10 CW8 lvm[2163]: /dev/ram2: Added to device cache
Feb 19 22:40:10 CW8 lvm[2163]: /dev/sda2: Added to device cache
Feb 19 22:40:10 CW8 lvm[2163]: /dev/CW8/opt: Aliased to /dev/mapper/CW8-opt in device cache (preferred name)
Feb 19 22:40:10 CW8 lvm[2163]: /dev/ram8: Added to device cache
Feb 19 22:40:10 CW8 lvm[2163]: /dev/sda8: Added to device cache
Feb 19 22:40:10 CW8 lvm[2163]: /dev/ram9: Added to device cache
Feb 19 22:40:10 CW8 lvm[2163]: /dev/sda9: Added to device cache
Feb 19 22:40:10 CW8 lvm[2163]: /dev/ram15: Added to device cache
Feb 19 22:40:10 CW8 lvm[2163]: /dev/ram3: Added to device cache
Feb 19 22:40:10 CW8 lvm[2163]: /dev/sda3: Added to device cache
Feb 19 22:40:10 CW8 lvm[2163]: /dev/ram4: Added to device cache
Feb 19 22:40:10 CW8 lvm[2163]: /dev/ram7: Added to device cache
Feb 19 22:40:10 CW8 lvm[2163]: /dev/sda7: Added to device cache
Feb 19 22:40:10 CW8 lvm[2163]: Loaded persistent filter cache from /etc/lvm/cache/.cache
Feb 19 22:40:10 CW8 lvm[2163]: Closed /etc/lvm/cache/.cache
Feb 19 22:40:10 CW8 lvm[2163]: Setting activation/reserved_stack to 256
Feb 19 22:40:10 CW8 lvm[2163]: Setting activation/reserved_memory to 8192
Feb 19 22:40:10 CW8 lvm[2163]: Setting activation/process_priority to -18
Feb 19 22:40:10 CW8 lvm[2163]: Initialised format: lvm1
Feb 19 22:40:10 CW8 lvm[2163]: Initialised format: pool
Feb 19 22:40:10 CW8 lvm[2163]: Initialised format: lvm2
Feb 19 22:40:10 CW8 lvm[2163]: global/format not found in config: defaulting to lvm2
Feb 19 22:40:10 CW8 lvm[2163]: lvmcache: initialised VG #orphans_lvm1
Feb 19 22:40:10 CW8 lvm[2163]: lvmcache: initialised VG #orphans_pool
Feb 19 22:40:10 CW8 lvm[2163]: lvmcache: initialised VG #orphans_lvm2
Feb 19 22:40:10 CW8 lvm[2163]: Initialised segtype: striped
Feb 19 22:40:10 CW8 lvm[2163]: Initialised segtype: zero
Feb 19 22:40:10 CW8 lvm[2163]: Initialised segtype: error
Feb 19 22:40:10 CW8 lvm[2163]: Initialised segtype: free
Feb 19 22:40:10 CW8 lvm[2163]: Setting dmeventd/snapshot_library to libdevmapper-event-lvm2snapshot.so
Feb 19 22:40:10 CW8 lvm[2163]: Initialised segtype: snapshot
Feb 19 22:40:10 CW8 lvm[2163]: Initialised segtype: mirror
Feb 19 22:40:10 CW8 lvm[2163]: Setting backup/retain_days to 30
Feb 19 22:40:10 CW8 lvm[2163]: Setting backup/retain_min to 10
Feb 19 22:40:10 CW8 lvm[2163]: Setting backup/archive_dir to /etc/lvm/archive
Feb 19 22:40:10 CW8 lvm[2163]: Setting backup/backup_dir to /etc/lvm/backup
Feb 19 22:40:10 CW8 lvm[2163]: Locking memory
Feb 19 22:40:10 CW8 lvm[2163]: memlock_count_daemon inc to 1
Feb 19 22:46:29 CW8 lvm[2163]: Unlocking memory
Feb 19 22:46:29 CW8 lvm[2163]: memlock_count_daemon dec to 0
Feb 19 22:46:29 CW8 lvm[2163]: Dumping persistent device cache to /etc/lvm/cache/.cache
Feb 19 22:46:29 CW8 lvm[2163]: Locking /etc/lvm/cache/.cache (F_WRLCK, 1)
Feb 19 22:46:29 CW8 lvm[2163]: Opened /etc/lvm/cache/.cache RO
Feb 19 22:46:29 CW8 lvm[2163]: Loaded persistent filter cache from /etc/lvm/cache/.cache
Feb 19 22:46:29 CW8 lvm[2163]: Unlocking fd 8
Feb 19 22:46:29 CW8 lvm[2163]: Closed /etc/lvm/cache/.cache
Feb 19 22:46:29 CW8 lvm[2163]: Wiping internal VG cache
Feb 19 22:53:05 CW8 lvm[2163]: Loading config file: /etc/lvm/lvm.conf
Feb 19 22:53:05 CW8 lvm[2163]: Opened /etc/lvm/lvm.conf RO
Feb 19 22:53:05 CW8 lvm[2163]: Closed /etc/lvm/lvm.conf
Feb 19 22:53:05 CW8 lvm[2163]: Setting log/syslog to 1
Feb 19 22:53:05 CW8 lvm[2163]: Setting log/level to 0
Feb 19 22:53:05 CW8 lvm[2163]: Setting log/verbose to 0
Feb 19 22:53:05 CW8 lvm[2163]: Setting log/indent to 1
Feb 19 22:53:05 CW8 lvm[2163]: Setting global/abort_on_internal_errors to 0
Feb 19 22:53:05 CW8 lvm[2163]: Setting log/prefix to 
Feb 19 22:53:05 CW8 lvm[2163]: Setting log/command_names to 0
Feb 19 22:53:05 CW8 lvm[2163]: Setting global/test to 0
Feb 19 22:53:05 CW8 lvm[2163]: Setting log/overwrite to 0
Feb 19 22:53:05 CW8 lvm[2163]: log/activation not found in config: defaulting to 0
Feb 19 22:53:05 CW8 lvm[2163]: Logging initialised at Sat Feb 19 22:53:05 2011
Feb 19 22:53:05 CW8 lvm[2163]: Setting global/umask to 63
Feb 19 22:53:05 CW8 lvm[2163]: Setting devices/dir to /dev
Feb 19 22:53:05 CW8 lvm[2163]: Setting global/proc to /proc
Feb 19 22:53:05 CW8 lvm[2163]: Setting global/activation to 1
Feb 19 22:53:05 CW8 lvm[2163]: global/suffix not found in config: defaulting to 1
Feb 19 22:53:05 CW8 lvm[2163]: Setting global/units to h
Feb 19 22:53:05 CW8 lvm[2163]: Setting activation/readahead to auto
Feb 19 22:53:05 CW8 lvm[2163]: Setting activation/udev_rules to 1
Feb 19 22:53:05 CW8 lvm[2163]: Setting activation/udev_sync to 1
Feb 19 22:53:05 CW8 lvm[2163]: Setting activation/missing_stripe_filler to error
Feb 19 22:53:05 CW8 lvm[2163]: Setting global/si_unit_consistency to 1
Feb 19 22:53:05 CW8 lvm[2163]: devices/preferred_names not found in config file: using built-in preferences
Feb 19 22:53:05 CW8 lvm[2163]: Matcher built with 3 dfa states
Feb 19 22:53:05 CW8 lvm[2163]: Setting devices/ignore_suspended_devices to 0
Feb 19 22:53:05 CW8 lvm[2163]: Setting devices/cache_dir to /etc/lvm/cache
Feb 19 22:53:05 CW8 lvm[2163]: Setting devices/write_cache_state to 1
Feb 19 22:53:05 CW8 lvm[2163]: Opened /etc/lvm/cache/.cache RO
Feb 19 22:53:05 CW8 lvm[2163]: /dev/CW8/home: Added to device cache
Feb 19 22:53:05 CW8 lvm[2163]: /dev/ram11: Added to device cache
Feb 19 22:53:05 CW8 lvm[2163]: /dev/sda11: Added to device cache
Feb 19 22:53:05 CW8 lvm[2163]: /dev/mapper/CW8-var: Added to device cache
Feb 19 22:53:05 CW8 lvm[2163]: /dev/ram10: Added to device cache
Feb 19 22:53:05 CW8 lvm[2163]: /dev/sda10: Added to device cache
Feb 19 22:53:05 CW8 lvm[2163]: /dev/mapper/CW8-home: Aliased to /dev/CW8/home in device cache
Feb 19 22:53:05 CW8 lvm[2163]: /dev/ram12: Added to device cache
Feb 19 22:53:05 CW8 lvm[2163]: /dev/ram6: Added to device cache
Feb 19 22:53:05 CW8 lvm[2163]: /dev/sda6: Added to device cache
Feb 19 22:53:05 CW8 lvm[2163]: /dev/ram13: Added to device cache
Feb 19 22:53:05 CW8 lvm[2163]: /dev/ram14: Added to device cache
Feb 19 22:53:05 CW8 lvm[2163]: /dev/CW8/var: Aliased to /dev/mapper/CW8-var in device cache (preferred name)
Feb 19 22:53:05 CW8 lvm[2163]: /dev/ram5: Added to device cache
Feb 19 22:53:05 CW8 lvm[2163]: /dev/sda5: Added to device cache
Feb 19 22:53:05 CW8 lvm[2163]: /dev/sdb5: Added to device cache
Feb 19 22:53:05 CW8 lvm[2163]: /dev/CW8/s_var: Added to device cache
Feb 19 22:53:05 CW8 lvm[2163]: /dev/ram1: Added to device cache
Feb 19 22:53:05 CW8 lvm[2163]: /dev/sda1: Added to device cache
Feb 19 22:53:05 CW8 lvm[2163]: /dev/sdb1: Added to device cache
Feb 19 22:53:05 CW8 lvm[2163]: /dev/CW8/srv: Added to device cache
Feb 19 22:53:05 CW8 lvm[2163]: /dev/mapper/CW8-opt: Added to device cache
Feb 19 22:53:05 CW8 lvm[2163]: /dev/ram0: Added to device cache
Feb 19 22:53:05 CW8 lvm[2163]: /dev/mapper/CW8-srv: Aliased to /dev/CW8/srv in device cache
Feb 19 22:53:05 CW8 lvm[2163]: /dev/mapper/CW8-s_var: Aliased to /dev/CW8/s_var in device cache
Feb 19 22:53:05 CW8 lvm[2163]: /dev/ram2: Added to device cache
Feb 19 22:53:05 CW8 lvm[2163]: /dev/sda2: Added to device cache
Feb 19 22:53:05 CW8 lvm[2163]: /dev/CW8/opt: Aliased to /dev/mapper/CW8-opt in device cache (preferred name)
Feb 19 22:53:05 CW8 lvm[2163]: /dev/ram8: Added to device cache
Feb 19 22:53:05 CW8 lvm[2163]: /dev/sda8: Added to device cache
Feb 19 22:53:05 CW8 lvm[2163]: /dev/ram9: Added to device cache
Feb 19 22:53:05 CW8 lvm[2163]: /dev/sda9: Added to device cache
Feb 19 22:53:05 CW8 lvm[2163]: /dev/ram15: Added to device cache
Feb 19 22:53:05 CW8 lvm[2163]: /dev/ram3: Added to device cache
Feb 19 22:53:05 CW8 lvm[2163]: /dev/sda3: Added to device cache
Feb 19 22:53:05 CW8 lvm[2163]: /dev/ram4: Added to device cache
Feb 19 22:53:05 CW8 lvm[2163]: /dev/ram7: Added to device cache
Feb 19 22:53:05 CW8 lvm[2163]: /dev/sda7: Added to device cache
Feb 19 22:53:05 CW8 lvm[2163]: Loaded persistent filter cache from /etc/lvm/cache/.cache
Feb 19 22:53:05 CW8 lvm[2163]: Closed /etc/lvm/cache/.cache
Feb 19 22:53:05 CW8 lvm[2163]: Setting activation/reserved_stack to 256
Feb 19 22:53:05 CW8 lvm[2163]: Setting activation/reserved_memory to 8192
Feb 19 22:53:05 CW8 lvm[2163]: Setting activation/process_priority to -18
Feb 19 22:53:05 CW8 lvm[2163]: Initialised format: lvm1
Feb 19 22:53:05 CW8 lvm[2163]: Initialised format: pool
Feb 19 22:53:05 CW8 lvm[2163]: Initialised format: lvm2
Feb 19 22:53:05 CW8 lvm[2163]: global/format not found in config: defaulting to lvm2
Feb 19 22:53:05 CW8 lvm[2163]: lvmcache: initialised VG #orphans_lvm1
Feb 19 22:53:05 CW8 lvm[2163]: lvmcache: initialised VG #orphans_pool
Feb 19 22:53:05 CW8 lvm[2163]: lvmcache: initialised VG #orphans_lvm2
Feb 19 22:53:05 CW8 lvm[2163]: Initialised segtype: striped
Feb 19 22:53:05 CW8 lvm[2163]: Initialised segtype: zero
Feb 19 22:53:05 CW8 lvm[2163]: Initialised segtype: error
Feb 19 22:53:05 CW8 lvm[2163]: Initialised segtype: free
Feb 19 22:53:05 CW8 lvm[2163]: Setting dmeventd/snapshot_library to libdevmapper-event-lvm2snapshot.so
Feb 19 22:53:05 CW8 lvm[2163]: Initialised segtype: snapshot
Feb 19 22:53:05 CW8 lvm[2163]: Initialised segtype: mirror
Feb 19 22:53:05 CW8 lvm[2163]: Setting backup/retain_days to 30
Feb 19 22:53:05 CW8 lvm[2163]: Setting backup/retain_min to 10
Feb 19 22:53:05 CW8 lvm[2163]: Setting backup/archive_dir to /etc/lvm/archive
Feb 19 22:53:05 CW8 lvm[2163]: Setting backup/backup_dir to /etc/lvm/backup
Feb 19 22:53:05 CW8 lvm[2163]: Locking memory
Feb 19 22:53:05 CW8 lvm[2163]: memlock_count_daemon inc to 1
Feb 19 23:08:32 CW8 lvm[2163]: Unlocking memory
Feb 19 23:08:32 CW8 lvm[2163]: memlock_count_daemon dec to 0
Feb 19 23:08:32 CW8 lvm[2163]: Dumping persistent device cache to /etc/lvm/cache/.cache
Feb 19 23:08:32 CW8 lvm[2163]: Locking /etc/lvm/cache/.cache (F_WRLCK, 1)
Feb 19 23:08:32 CW8 lvm[2163]: Opened /etc/lvm/cache/.cache RO
Feb 19 23:08:32 CW8 lvm[2163]: Loaded persistent filter cache from /etc/lvm/cache/.cache
Feb 19 23:08:32 CW8 lvm[2163]: Unlocking fd 8
Feb 19 23:08:32 CW8 lvm[2163]: Closed /etc/lvm/cache/.cache
Feb 19 23:08:32 CW8 lvm[2163]: Wiping internal VG cache

I don't know when these started appearing. /etc/lvm/lvm.conf is as-installed so should not be the cause. In the kernel configuration "Device Drivers" -> "Multiple devices driver support (RAID and LVM)", "Device mapper debugging support" is cleared so should not be the cause. Which leaves me with no idea what may be causing it :confused:

The distro is Slackware64 13.1.

Best

Charles

cin_ 02-21-2011 03:30 AM

man lvm()
 
From the lvm() man page...
Quote:

# man lvm
...
Options
The following options are available for many of the commands. They are implemented generically and documented here rather than repeated on individual manual pages.

-h | --help -- Display the help text.
--version -- Display version information.
-v | --verbose -- Set verbose level.
Repeat from 1 to 3 times to increase the detail of messages sent to stdout and stderr. Overrides config file setting.
-d | --debug -- Set debug level.
Repeat from 1 to 6 times to increase the detail of messages sent to the log file and/or syslog (if configured). Overrides config file setting.
--quiet -- Suppress output and log messages.
Overrides -d and -v.
...
#
I believe lvcreate() is one of these `many of the commands`.

catkin 02-21-2011 04:00 AM

Thanks cin_ :)

"gramm'err" :D

I am confident that my script is not using lvcreate's -d or --debug options and am reluctant to use --quiet in case it suppresses error messages.

cin_ 02-22-2011 04:57 AM

-d
 
I saw from your post that your command was --debug'less, but I was suggesting you try adding it, at variable levels, 1-6, to see what kind of message volume you receive from each.

I'm glad the `gramm'err` pun'age garnered enough regard as to require the teeth to come out. I am always reluctant to use puns. I feel they are jokes that create a certain level of exclusion. If you are unfamiliar with a language then the joke is lost on you. But this one seemed to be tech'based enough to allow to overcome the pun's inherent exclusivity.

catkin 02-22-2011 05:20 AM

Quote:

Originally Posted by cin_ (Post 4267110)
I saw from your post that your command was --debug'less, but I was suggesting you try adding it, at variable levels, 1-6, to see what kind of message volume you receive from each.

OK. Will try it.

catkin 07-27-2011 02:46 PM

Same output with three debugs ...


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