drbd-user March 2013 archive
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drbd-user: [DRBD-user] [Solved] Low drbd performance, ~50% of ra

[DRBD-user] [Solved] Low drbd performance, ~50% of raw disk

From: <bd_at_nospam>
Date: Fri Mar 01 2013 - 12:10:30 GMT
To: drbd-user@lists.linbit.com

On Tue, Jan 29, 2013 at 12:59:05PM +0100, bd@bc-bd.org wrote:
> Hello,
> I am trying to setup a 2 node, drbd, kvm cluster to host a couple virtual
> machines. However the IO performance I get is quite low, both inside the guest
> and on the host when directly writing to the drbd device, compared to what I
> get on the disk directly.

As sugested we bought a BBU and enabled WriteBack on the Controller. I am now
able to max out at ~450 MB/s when writing and using 3 VMs :)

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