On Oct 12, 2010, at 3:34 PM, Robinson, Eric wrote: > I'm happy with the performance of our DRBD clusters. They have scaled very > well. One of our older drbd 8.0.14 clusters is pretty busy these days > servicing about 130 separate instances of MySQL and is seeing bursts of > 10-30% iowait, sometimes more, for maybe 3-4 seconds at a time. Someone told > me I could increase performance and reduce iowait by mounting the ext3 > filesystem with the "noatime" option. Are there any dangers to be concerned > about when mounting a drbd device using the noatime option?
No more than any other kind of block device. If you're ok using noatime (and for a database you probably are) then using it with DRBD doesn't make a difference.
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