[DRBD-user] drbd write performance across WAN
Luciano Miguel Ferreira Rocha
strange at nsk.no-ip.org
Wed Aug 16 17:53:04 CEST 2006
On Wed, Aug 16, 2006 at 08:20:46AM -0700, khaja mohideen wrote:
> I am using drbd 0.7.20 in debian 3.1. I have setup
> drbd in such that Primary Server(host A) is located in
> our office. Secondary Server(host B) i.e., that the
> backup is located in remote office. It's connected
> via VPN.
> The write performance is heavily degraded. I have
> used Protocol A & sndbuf-size 512k . Still the same
> results. am I missing anything. Pls advice/guide me
> to tweak the write performance.
Write performance will always be limited by network performance.
Protocol A will only give an advantage if you have short write bursts.
Otherwise, your system's memory will get full very fast.
> Also can drbd support a single backup/mirror server
> for multiple primary servers. i.e., Multiple
> Partitions from multiple servers(host1, host2) need to
> replicate to mulitiple paritions on a single secondary
> server(Host B).
Yes, the peers are defined for each resource. You're not limited to the
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