[DRBD-user] DRBD deadly slow

Stefan Seifert nine at detonation.org
Thu Nov 13 16:48:25 CET 2008

Note: "permalinks" may not be as permanent as we would like,
direct links of old sources may well be a few messages off.

On Thursday, 13. November 2008, Felix Zachlod wrote:
> The
> Systems are each running on a q-core Xeon processor, 4GB memory and have a
> 16 channel icp raid controller with BBWC and are configured with raid 60
> underlying. Trying to write to a sample partition /dev/sdbX on each of the
> machines will reach about 120MByte/s write performance which seems is poor
> for a raid of 16 1TB SATA drives but okay that is not the point here.

Just a wild guess: where do you store your drbd meta data? AFAIK RAID 5 is no 
good option for meta data due to it's write latency. I'd guess that for RAID 
6 this is even more so.

Maybe putting meta data on a RAID 1 is worth a try for you.


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