[DRBD-user] 99% IO usage with drbd/gfs2

Lee Riemer lriemer at bestline.net
Tue Sep 28 15:46:27 CEST 2010

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

  What RAID backend are you using?  If it's RAID 5, then I would search 
the web on how to lower iowait for that card.

The 3ware (LSI) 9550SX card is notorious for high IOWAIT when using RAID 5.

On 9/27/2010 2:37 PM, Christoffer Andersson wrote:
> I have big problems with high IO; gfs2_logd and pdflush uses 99% IO 
> every 2 minutes, and this makes everything freeze for ~15 seconds.
> Both servers are in the same hall and connected via 100Mbit.
> I'm attaching a screenshot of 'iotop' and my drbd.conf
> Anybody got ideas what might be wrong?
> Best regards
> Christoffer
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