| |
|
 |
|
 |
|
|
|
| |
|
|
xen-users
Re: [Xen-users] High IOWAIT
Maarten Vanraes wrote:
I must say that we have great problems with extremely high IOWAIT, possibly
due to the raid card not being fully hardware raid (allthough we had
requested it).
We even used the tap:aio, but it made no difference.
tap:aio could be part of your problems as well.
Its my understanding that under heavier workloads tap:aio which is still
file based does not perform as well as a direct disk or lvm.
And on the storage thing, Yes it is kind of a pain that you need many
disks to get faster speeds, and it seems like all they make is large
disks anymore. I suppose just look at the extra storage as good backup
locations :)
How many disk are in your raid set? What hardware raid card did you order?
I would highly recommend a BBU on that raid card. I know for 3ware cards
specifically there is up to 10% performance increase with BBU present.
--
Nick Anderson <nick@xxxxxxxxxxxx>
http://www.cmdln.org
http://www.anders0n.net
nick.vcf
Description: Vcard
_______________________________________________
Xen-users mailing list
Xen-users@xxxxxxxxxxxxxxxxxxx
http://lists.xensource.com/xen-users
|
|
|
| |
|
Home