On Wed, 2009-07-22 at 18:16 -0700, Ian Forde wrote:
On Wed, 2009-07-22 at 11:16 +0200, Coert Waagmeester wrote:
The highest speed I can get through that link with drbd is 11 MB/sec (megabytes)
Not good...
But if I copy a 1 gig file over that link I get 110 MB/sec.
That tells me that the network connection is fine. The issue is at a higher layer...
Why is DRBD so slow?
Let's see...
common { protocol C; syncer { rate 80M; } net { allow-two-primaries; } }
You want allow-two-primaries? That implies that you're using something like ocfs2, but that's probably immaterial to the discussion... Here's a question - do you have another syncer statement in the resource definition that's set to a lower number? That would definitely throttle the sync rate...
-I
I occasionally do migration from one dom0 to the other
I do not have clustered file sytems, so I make sure that two are only primary during the migration.
I have no automation yet, I do it all manually to be sure.
I only have one syncer defenition, and according to the drbd manual that is the rate for full resyncs?
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