[DRBD-user] Transfer rates

Bernd Schubert bernd-schubert at web.de
Thu Jun 24 18:13:17 CEST 2004

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

Hello Daniel,

> I have a gigabit connection but I am not sure if my transfer rates are
> reasonable.
> Could someone provide some figures which real troughput can be expected
> with drbd and 1000Mbit.
> drbd shows
> version: 0.6.12 (api:64/proto:62)
> 0: cs:SyncingAll st:Primary/Secondary ns:20803700 nr:0 dw:0 dr:20803860
> pe:15 ua:0
>          [>...................] sync'ed:  3.8% (305724/317546)M
>          finish: 2:59:12h speed: 29,274 (28,962) K/sec

depending on the speed of the disk of our failover server (it only has one 
250MB ide disk) we get transfer rates between 40 and 60MB/s. 

> NFS gives me only 120Mbit if I test with dd.
> So something might be wrong here....

Did you already try to enable nfs over tcp? We got around 800MBit in our 

Also, the network cards might be important. Our computer center suggested to 
use Syskonnect cards and we are very pleased with the SK-9821 cards.


Bernd Schubert
Physikalisch Chemisches Institut / Theoretische Chemie
Universität Heidelberg
INF 229
69120 Heidelberg
e-mail: bernd.schubert at pci.uni-heidelberg.de

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