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Operating Systems AIX Filesystem reduction size issue Post 302900709 by borek on Thursday 8th of May 2014 10:36:54 AM
Old 05-08-2014
Ohh...ok. I always thought that LVM is smart enough and can do space reduction in fly (also if reduced LPs contain data).

Both filesystems are busy in < 50% - but looks like data are fragmented across all disks and LVM "lock" data during shrink process.

Is there an option to check if given LP is free or contain filesystem data?

Is there an option to do it online? Play with defrag command?
 

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vgcfgbackup(1M) 														   vgcfgbackup(1M)

NAME
vgcfgbackup - create or update LVM volume group configuration backup file SYNOPSIS
vg_conf_path] vg_name DESCRIPTION
The command saves the LVM configuration for a volume group in a default or alternate configuration backup file (see the option). By default, runs automatically each time an LVM command changes the LVM configuration. In this case, it always uses the default configura- tion backup file. An existing default configuration backup file is renamed with an extension of Options and Arguments recognizes the following options and arguments: vg_name The path name of a volume group. Save the configuration using an alternate file name specified by vg_conf_path. If is omitted, the default file name is in the form: base_vg_name is the base name of vg_name. For example, if vg_name is specified as base_vg_name is Update the configuration backup file with the latest LVM configuration. Only those physical volumes added since the configuration backup file was last modified need to be online. If is omitted, all physical volumes for vg_name must be online. RETURN VALUE
exits with one of the following values: Successful completion. Failure. Errors occurred when information from the volume group was being accessed. EXTERNAL INFLUENCES
Environment Variables determines the language in which messages are displayed. If is not specified or is null, it defaults to "C" (see lang(5)). If any internationalization variable contains an invalid setting, all internationalization variables default to "C" (see environ(5)). EXAMPLES
Back up LVM configuration information for volume group in the default backup file Update LVM configuration information corresponding to volume group in the default backup file Back up LVM configuration information for volume group in the alternate configuration backup file WARNINGS
It is recommended that any alternate configuration backup file be created in the root file system (as is the case with the default path name). This facilitates easy volume group recovery during maintenance mode, such as after a system crash. AUTHOR
was developed by HP. SEE ALSO
vgcfgrestore(1M). vgcfgbackup(1M)
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