[DRBD-user] Progressive slowdown with DRBD 0.7.22

Marc Cousin mcousin at sigma.fr
Tue Apr 22 10:40:41 CEST 2008

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


Hi, the problem occured again... The write speed went down over time.

Is there anybody who may have an idea where to look at ...

I've done network tests (pings, netcats) and everything is ok (throughput over 
100 MBytes/s), disks tests everywhere (all of them are ok too).



On Thursday 10 April 2008 14:29:54 Marc Cousin wrote:
> Hi,
>
> I'm having a strange problem with a DRBD cluster.
>
> The write speed of all DRBD periphals is progressively slowing down on both
> nodes, until I disconnect and reconnect them...
>
> After about a week of use, write speed is down to about 4,5 MB/s. After
> disconnect/reconnect, it's back to around 30/40 MB/s.
>
> I've not seen it on other similar clusters, so I'm wondering what could be
> wrong with this one.
>
> It's DRBD 0.7.22, on Red Hat EL 3.
>
> I don't know where to look at for this problem...
> If anybody has any clues, thanks for sharing them :)
>
> Cheers
>
> Marc Cousin
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