“1) The swap wants reasonably fast disk”
With 500 vms I’d hope you have a decent amount of spindles
to play with (it is certainly justified), if the swap needs to be really fast
why not carve a dedicated aggregate for them and FC attach them. I don’t
see how putting the swap luns in a different volume on the same aggregate will
make the swap any faster, other than removing ASIS from the equation.
- Hadrian
From:
owner-toasters@mathworks.com [mailto:owner-toasters@mathworks.com] On Behalf
Of Page, Jeremy
Sent: Thursday, February 21, 2008 5:04 AM
To: Toasters
Subject: Mulling over virtual disk layout
We are in the preliminary stages of moving our 500 VM system to
NFS (from fibre). The goal is to SnapVault everything off site, and I’d
like to use A-SIS on our production volumes if at all possible (our VMs are
almost identical and 95% reads so this should give us a great level of
compression). My question to you is this:
Should I put the swap file on a different VMDK and put that in a
different volume? The reasoning behind this is that 1) The swap wants
reasonably fast disk and 2) I think that the swap file will not “play
nicely” with A-SIS, at least not as nicely as normal data and 3) There is
no need to actually waste bandwidth snapping the swap file offsite since
it’s not needed to recover the machines (as long as in a DR standpoint we
create the drive that contained the swap windows will create it at boot).
Thoughts or experiences welcome.
Jeremy M. Page____________________
Systems Architect
* email:Jeremy.Page@gilbarco.com - ( phone: 336.547.5399 - 6 fax: 336.547.5163 - ( cell: 336.601.7274
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