[linux-lvm] LVM2 resync speed problems
Leonard Smith
lrsmith at gmail.com
Wed Jun 13 01:52:54 UTC 2007
I am running CentOS4.4 on two "black" box systems that are
identically configured. Both have 500 GB internal drives, ( same type)
and were installed using the same kickstart configuration. The drives
are being mirrored using LVM.
When I check the first system it is re-syncing and the resync time and speed are
finish=18559.6min speed=355K/sec
On the second system the time and speed are
finish=89.5min speed=68170K/sec
I can't figure out why the speeds are different between the two. I
checked /proc/sys/dev/raid/speed_limit_ and they are the same. The
priority of the md proceses are they same.
I tweaked the setting of the speel_limit_min and increase the nice
priority of the resync process, on the first box, but I could never
get it better than
finish=4551.8min speed=1445K/sec
I've googled and I haven't found much more useful information that to
adjust those settings. Besides those setting what else dictates the
speed used?
Thanks,
Len
More information about the linux-lvm
mailing list