[linux-lvm] pvmove and 100% IO Wait
chrischan at knebb.de
Sat Nov 8 20:35:26 UTC 2008
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I've some issues with pvmove.
It is very likely to appear during a pvmove operation for my server to
spike to 100% IO waits.
If this happens, no IO on the LVs is possible, even the rest of the
server is accessible without any issues.
I can't predict when it happens, but it happens...
pvmove started. Some minutes or hours later the io wait on the server
goes up to 100% (or 3 cores of the quad core are going to 100%).
Running a RedHat EL 5.x (CentOS) with all current updates. The storage
consists of two 3Ware 9500 PCI-X, a USB-SATA drive and three disks
connected to the local SATA controller.
I can't see anything relevant in the logfiles. When the CPU is up, I
have to reset the server as any operation on the LV will never finish :-(
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