[DRBD-user] PingAck did not arrive in time.

Robert Altnoeder robert.altnoeder at linbit.com
Tue Jun 25 11:20:50 CEST 2019

On 6/25/19 6:00 AM, Oleksiy Evin wrote:
> However, could you please clarify, what are the limitations/drawbacks
> of a single volume use?

Regarding huge volumes, the most obvious one is reaching the size limit,
which is currently 1 PiB.
But there are other limitations as well, e.g.:
- a single huge volume limits the setup to a single DRBD resource, which
limits the setup to a single replication link
- same for disk backends, with multiple DRBD volumes, there can be
multiple independent backends
  (even different storage pools, e.g. a larger/slower/cheaper one for
the long term archive and a smaller/faster/more expensive one for the
currently running jobs)
- if a full sync is required for whatever reason, it takes a very long
time and always affects all data areas (or in this case, projects)
- same for verify

A setup with multiple resources is often more flexible and easier to
maintain than one with a single huge volume in a single resource.


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