[DRBD-user] Configuration DRBD cache, timeouts and locking

Igor Cicimov igorc at encompasscorporation.com
Sun Nov 27 22:08:51 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.

On 28 Nov 2016 6:18 am, <kircheis at mathematik.uni-marburg.de> wrote:
> Hello,
> i don't speak english very well, but i hope to make my request partly
> My task is to look for an opportunity to make an optimization regarding
> the reliabilty of a DRBD-Connection (Version 9) over a LAN between three
> or four mobile devices. The problems at the task with mobile devices is,
> that the devices may lose occasionally (and temporary) their connection to
> each other, but it has to be so that the DRBD alive in a most efficient
> manner.
> The paramount Topic is a comparison of energy efficiency between using
> DRBD and using NFS at the network edge.
> In NFS i found some configuration-tools to try. Especially configurations
> on the subject caching, locking and configuring timeouts may be useful.

DRBD works on block device level so no file system there. This is what you
need to understand and not compare it with nfs.

> Now, i'm looking for similiar configuration tools for DRBD, but i don't
> find very much in the documentation. I find something about disk flushes,
> but i don't see how to configurate here in a finely granular manner. To
> the subject locking, and configuring timeouts i don't find anything
> helpful. Can you give me please a hint, where in the documentation or in
> other stuff i may find further informations?
> many thanks
> best reguard
> Simmr
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