[DRBD-user] drbd8 vs drbd9 performance over 10Gbit link

Dr. Volker Jaenisch volker.jaenisch at inqbus.de
Thu Feb 9 02:45:21 CET 2017

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


I have two pairs of servers over the same 10 Gbit link:

1) Pair A is replicating a 1TB Sata Disk using drbd8 (Debian Jessie 8.6).

2) Pair B is replicating a 0.8TB Volume with an unterlying hardware Raid
10 consisting out of 6 SAS Disks, Stripe 16k utilizing drbd9 (Kernel 4.4

The server pair B should beat server pair A by at least by a factor of 3.

In case of a sync:

* Pair A delivers a sync rate of 20 Mb/sec.

* Pair B delivers a sync rate of 1 MB/sec

Any ideas?

Any help appreciated


   inqbus Scientific Computing    Dr.  Volker Jaenisch
   Richard-Strauss-Straße 1       +49(08861) 690 474 0
   86956 Schongau-West            http://www.inqbus.de

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