[DRBD-user] Performance issue about DRBD transport

Mark Wu wudx05 at gmail.com
Fri Feb 26 12:56:56 CET 2016

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


After applying the following configurations,  the result of DRBD9 local can
reach 57095 while DRBD9 export can reach 51980.

drbdmanage net-options --max-buffers 80000 --resource vol3
drbdmanage net-options --max-epoch-size 20000 --resource vol3
drbdmanage net-options --sndbuf-size 512000 --resource vol3
drbdmanage disk-options --md-flushes no --resource vol3
drbdmanage disk-options --read-balancing least-pending --resource vol3
drbdmanage disk-options --al-updates no --resource vol3
drbdmanage disk-options --disk-barrier no --resource vol3
drbdmanage disk-options --disk-flushes no --resource vol3
drbdmanage disk-options --al-extents 6481 --resource vol3

The following disk options can't be applied via drbdmanage.  I find if I
manually configure DRBD9 and add all the options for SSD,  it still can get
better.  So how to apply those options with drbdmanage?

 c-plan-ahead 10;
 resync-rate 400M;
 c-max-rate 600M;
 c-min-rate 10M;
 c-fill-target 44K;

Anyway,  I think the result is pretty good.  Thanks a lot for your help!

On Fri, Feb 26, 2016 at 4:52 PM, Roland Kammerer <roland.kammerer at linbit.com
> wrote:

> On Fri, Feb 26, 2016 at 09:38:05AM +0800, Mark Wu wrote:
> > Please note the "DRBD8 Local" is tested with a tuned configuration while
> > all DRBD9 tests are tested with the configurations generated by
> drbdmanage.
> Then start by making the setups as equivalent as possible... You can set
> all the options via drbdmanage:
> drbdmanage list | egrep options
> And some examples:
> http://drbd.linbit.com/users-guide-9.0/s-dm-setupopts.html
> Regards, rck
> _______________________________________________
> drbd-user mailing list
> drbd-user at lists.linbit.com
> http://lists.linbit.com/mailman/listinfo/drbd-user
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