[linux-lvm] Why does every lvm command insist on touching every pv?
Phillip Susi
psusi at cfl.rr.com
Tue Jun 15 20:24:11 UTC 2010
On 6/15/2010 3:17 PM, Takahiro Yasui wrote:
> Everytime lvm command is executed, all PVs are accessed.
>
> This is a known issue and what we should fix. If there are a lot of
> PVs, execution of lvm command could take a long time. The scan also
> affects error recovery time of lvm mirror.
>
> This is an old reference.
>
> Introduce metadata cache feature
> https://www.redhat.com/archives/lvm-devel/2009-April/msg00014.html
This seems to limit the number of metadata copies on pvs that are
accessed to one, but I am seeing even block devices that are not pvs
accessed, like it is scanning for new pvs. This patch seems like it
would help some though, but it is over a year old. Did it never get
applied?
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