[DRBD-user] drbd performance issue on SATA

Eduardo Diaz - Gmail ediazrod at gmail.com
Thu Jan 5 10:45:21 CET 2012

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


The cost of one PCI-E 1Gb card is for 10€, if you want use a Intel
good card, you cand speed 30€....

Change to 1G, this is you problem...

On Thu, Jan 5, 2012 at 1:07 AM, Arnold Krille <arnold at arnoldarts.de> wrote:
> On Wednesday 04 January 2012 13:18:32 François Delpierre wrote:
>> I noticed I did not reply to the list. So, here is the copy :
>>
>>
>> Hi Eduardo,
>>
>>
>> When I had these horrible performances I was not in a good situations :
>> - One 2GB disk SSD 7200RPM per node.
>> - DRBD 8.3, Protocol C, Active-Active
>> - 2 Network interfaces on a 100Mbits network switch.
>
> That will give you 12MB/s for drbd-io. Maybe 24 if trunked/bonded and your
> switch does its job right (my hp-switch at home doesn't(*)).
> Better not set your hopes to high with the ssd... Altough I never heard of an
> ssd with revolutions-per-minute.
>
> If you encounter low io performance (and you will unless your disks are way
> old and PATA without DMA), invest that ~50€ and give each server a gigabit
> card.
>
> Have fun,
>
> Arnold
>
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