Note: "permalinks" may not be as permanent as we would like,
direct links of old sources may well be a few messages off.
Hi, On 09/26/2013 05:23 PM, Matthias Teege wrote: > - no fancy drbd tunables set (e.g. "rate") heh, "fancy"? If you didn't touch any tuning parameters, low performance isn't all that miraculous. > - local logical volume -> local logical volume: FAST writing speeds > - local LVM2 logical volume -> local drbd device: SLOW writing speeds > > Any ideas what could eat up our performance while writing to a local > drbd device? Look at this: http://www.drbd.org/users-guide/ch-throughput.html I think the activity log may be especially promising for your scenario. If you have battery or flash backup for your RAID, definitely look at flush and drain options. HTH, Felix