LVM Stripping

[Joe415]

Hello

I want to create a volume group with 1 logical volume. We are running HP 11.23 and have an XP24K for storage. I have 20 luns each are 50GB in size and I want a stripe size of 1024KB.What is the best way to do this? Should I do the stipping when I create the volume group or when I create the logical volume? Also is this stripe size too large?

Thanks for any help

Joe

[Torsten.]

I don't know if this makes much sense, because the XP will stripe the data anyway.

Stripes are configured on LVOL level, see

http://docs.hp.com/en/B2355-60105/lvcreate.1M.html

[Geoff Wild]

You stripe at the lvol level

lvcreate -i 20 -I 1024 -L SIZE -n NAME /dev/vgXX

For my sapdata lvols, I striped at 128 across 7 x 72GB luns

Rgds...Geoff

[Torsten.]

IMHO you can do the most of performance tuning on the XP side of the line, if you stripe or not will only have a minor effect.

But it depends on many items and background conditions, so with that less information there is almost nothing to advise except talking to your storage network folks.

[Steven E. Protter]

Shalom Joe,

It has been proven over the years that configuring RAID on the hardware side provides better overall performance than software striping.

Better to use the CPU and bandwidth on the XP device than LVM.

SEP

[Geoff Wild · Accepted solution]

Yes - hardware striping is better - but we found that "double striping" sometimes gives you another performance gain on large databases...

Rgds...Geoff

[Joe415]

Thanks All!!