[DRBD-user] Configuring the scheduler for a DRBD backend

Wiebe Cazemier wiebe at halfgaar.net
Mon Jul 15 16:59:42 CEST 2013

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


As specified here: 


I'd like to tune some params. But, in:

echo deadline > /sys/block/device/queue/scheduler

what is 'device'? I have an LV on RAID as a DRBD back-end. Which of these devices do I change the scheduler of:

/dev/sda and /dev/sdb
/dev/dm-3 (being a link to the LV in question.

And, do they interfere when one is CFQ and another deadline?

Another point is, are those /dev/dm-x devices consistent on reboots?



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