On 3/31/21 2:32 AM, Michael Hierweck wrote:
Hi all,
with DRBD 9.0.25 we experience problem with the syncer rate.
Using default settings our IO system gets overloaded, especially when
multiple resources are be resynced in parallel.
It's possible to configure "serialized resyncs" by setting the
"resync-after" disk option.
For example, to suspend r1's resync until r0 has completed it's resync,
you would set the following:
----
resource r1 {
disk {
resync-after r0;
}
...
}
----
Neither
drbdadm peer-device-options --c-plan-ahead=X --c-max-sync-rate=Y <res>
The setting to limit the maximum rate of resync is 'c-max-rate', not
'c-max-sync-rate'. Maybe that helps, or is just a typo in your email.
drbdadm peer-device-options --c-plan-ahead=0 --resync-rate=Y <res>
<snip>
If I recall correcly, since DRBD 8.4.0 the 'resync-rate' is used as a
"starting point" for the dynamic resync controller, so I'm not sure
setting that will have a meaningful effect.
--
Matt Kereczman – Solutions Architect
+1 503 573-1262 x205
m...@linbit.com
LINBIT | Keeping the Digital World Running
DRBD – Corosync – Pacemaker
DRBD® and LINBIT® are registered trademarks of LINBIT, Austria.
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