Note: "permalinks" may not be as permanent as we would like,
direct links of old sources may well be a few messages off.
Ben wrote: > For what it's worth, I'm doing exactly what you're looking to do right now > with a whopping 7 DRBD devices. My write performance stinks - I can only > sync at 4MB/sec before a CPU core becomes entirely busy in IO wait - but I > suspect that's due to some misconfiguration, and haven't had much time to > look into it. Thanks for the bit of information. 4MB/sec initial re-sync? Or 4MB/sec write performance in dom0 or in domU? If its write performance in domU, you should look into scheduling configuration. See for example this thread: http://lists.xensource.com/archives/html/xen-users/2006-04/msg00115.html Doing something like the mentioned 'xm sched-sedf 0 0 0 0 1 1' could help. > Other than the write performance, using DRBD and xen with heartbeat is > really, really cool. Did you also try with less drbd devices and measure performance? Best Regards, Michael Paesold