From: Green, Simon (SGreen@KRAFTEUROPE.COM)
Date: Fri Oct 11 2002 - 06:29:54 EDT
I'd use mklvcopy to make a copy on both hdisk3 and hdisk4, then drop the
first copy and use migratepv to move stuff off hdisk4 to hdisdk2. You still
have to copy some of the partitions twice, but I don't think that can be
helped. Provided there's free space in the right place on hdisk2 migratepv
should be OK.
reorgvg might work, as suggested, but I've always found it to be very slow.
Another option would be to delete the filesystem, recreate it where you want
it and restore from a backup. Depending on your environment this might be
quicker than using mklvcopy/migratepv, but obviously the filesystem would be
unavailable.
Simon Green
Philip Morris ITSC Europe
AIX-L Archive at http://marc.theaimsgroup.com/?l=aix-l
<http://marc.theaimsgroup.com/?l=aix-l&r=1&w=2> &r=1&w=2
AIX FAQ at http://www.faqs.org/faqs/aix-faq/
<http://www.faqs.org/faqs/aix-faq/>
N.B. Unsolicited email from vendors will seldom be appreciated.
-----Original Message-----
From: Holger.VanKoll@SWISSCOM.COM [mailto:Holger.VanKoll@SWISSCOM.COM]
Sent: 07 October 2002 19:34
To: aix-l@Princeton.EDU
Subject: migrating a filesystem/lv from one disk to two disks
Hello,
I got a fs (say) called my_fs on lv my_lv thats on hdisk2, 20 LPs, no
mirroring.
hdisk2 is overloaded, especially with this fs. So I want to migrate 10 of
the 20 LPs to another disk.
hdisk3 and hdisk4 are in the same vg, both have 11 LP free. hdisk4 has also
much load, so I only want to "stripe" my_fs on hdisk2 and hdisk3.
I cant use migratepv -l my_lv, it always migrates the whole lv.
I could use chlv to set intrapolicy to max and do an reorgvg. That however
would distribute my_lv on hdisk2 and hdisk3 and hdisk4.
To prevent this, I could use "chpv -a n hdisk4" to prevent further
pp-allocations to hdisk4.
That could work, but did anyone ever do this? I am worrying about
performance. reorgvg needs one free pp (man reorgvg). Does that mean it will
temporarily mirror every pp on this free pp (11 LP free - 10 PP to get
allocated) ?
I could also use mklvcopy to make a lv copy on hdisk4. Then remove the
"original" copy on hdisk2. Then mklvcopy -m
map_file_containing_hdisk2_and_hdisk3 and rmlvcopy my_lv hdisk4. That should
also work, however, then the whole lv will be copied twice. And all I need
to do is moving some PP from hdisk2 to hdisk3...
This archive was generated by hypermail 2.1.7 : Wed Apr 09 2008 - 22:16:15 EDT