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Operating Systems AIX Filesystem reduction size issue Post 302900760 by borek on Thursday 8th of May 2014 01:48:45 PM
Old 05-08-2014
df output looks like that - i want reduce size to +/-300G per filesystem

Code:
# df -g | grep data
/dev/data1    400.00    191.44   53%       43     1% /oracle/data1
/dev/data2    485.00    260.82   47%       29     1% /oracle/data2

iostat output was captured while chfs command was running - during normal operation is not above 30% for sure.

Regarding your questions :

1. NPIV
2-3. System doesn't have performance issue. LUN size depends on storage system and application above. Queue depth is optimal for powerpath devices.
4. What version of OS are you using? AIX 6.1TL8SP1
5. What version of oracle are you using? 11G - no cio option need


Can filesystem defrag be helpful here? Is there a way to match inode/filesystem block to particular LPs? Any other "online" solution?

What about assign one big lun, move all PPs by migratepv and shrink filesystem size (once lv will be on one PV).
 

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gfs2_convert(8) 					      System Manager's Manual						   gfs2_convert(8)

NAME
gfs2_convert - Convert a GFS1 filesystem to GFS2 SYNOPSIS
gfs2_convert [OPTION]... DEVICE DESCRIPTION
gfs2_convert is used to convert a filesystem from GFS1 to GFS2. Do not attempt to convert a GFS1 filesystem which is not clean - the process of conversion will reinitialise the journals. We highly recommend that fsck.gfs is run successfully before attempting to convert a filesystem. Many of the on-disk structures are identical between GFS1 and GFS2, so the conversion process updates the journals, a few items of incompatible metadata (mostly indirect pointers and inodes) and adds the per-node directories required by the gfs2meta filesystem. The conversion process is performed in-place and does not require any extra disk space so that it is possible to successfully convert a GFS1 filesystem that is completely full. Always ensure you have a complete backup of the data on any filesystem before starting the conversion process. OPTIONS
-h Help. This prints out the proper command line usage syntax. -q Quiet. Print less information while running. -n No to all questions. -V Print program Version information only. Print out the current version name. -v Verbose operation. Print more information while running. -y Yes to all questions. By specifying this option, gfs2_convert will not prompt before making changes. EXAMPLE
gfs2_convert /dev/vg0/lvol0 This will convert the Global File System on the block device "/dev/vg0/lvol0" to gfs2 format. gfs2_convert(8)
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