pvmove question

BFCsaus · 04-26-2012, 03:18 AM

Hi,

I am moving a 3TB LUN to a LUN which has been presented to the OS and added to the VG. This will obviously take a while.

The pvmove itself is no problem but I was wondering where new data (for example Oracle archive logs) was written to. Im presuming the logs will be written to the new LUN but am not 100% certain so any clarification would be appreciated.

Last thing I would want is for the LUN's to be 'out of sync' after the pvmove.

Thanks.

syg00 · 04-26-2012, 04:19 AM

I would have thought the manpage covered this in sufficient detail.
If it mirrors the data (in segments), you should have no concerns. It won't matter to you where it gets writ - that's what the metadata is tracking. At the completion, it'll all be at the target destination.
Hopefully ....

IMHO there is no way in the world pvmove could be considered usable if it allowed even the possibility of out of sync images.

BFCsaus · 04-27-2012, 02:14 AM

Thanks for the reply.

I did read the man pages and also googled but as this is part of a clustered production system wanted to be 100% certain..

Cheers..

syg00 · 04-27-2012, 02:31 AM

Cluster in what sense ?. What type of filesystem are you talking about ?.
I might reconsider my answer if you have a multi-node distributed filesystem on that. Might not matter theoretically, but I might not want to expose my private parts to a meat cleaver in that sort of environment either.