Note: "permalinks" may not be as permanent as we would like,
direct links of old sources may well be a few messages off.
Jason Gray schrieb:
> I'm looking at creating a multi-clustered array server network for our
> production environment. Is it possible to have 5,6,7..n servers clustered
> together (kind of like a token ring) to act as redundant arrays for each
> other?
DRBD is a two node cluster.
You can have something like this:
Node1 Node2 Node3
----- ----- -----
drbd1 Primary Secondary
drbd2 Secondary Primary
drbd3 Primary Secondary
drbd4 Secondary Primary
> So, instead of having a Primary array I would have 5,6 or 7 "Primary" arrays
> that mirror each other across an isolated network (10.0.0.0 say).
Not each to each.
You can build a "chain":
Situation 1:
Node1 Node2 Node3
----- ----- -----
drbd1 Primary Secondary stopped
Then switch to Situation 2:
Node1 Node2 Node3
----- ----- -----
drbd1 stopped Primary Secondary
This sort of switchover will take time, because Node3 needs to sync with
Node2. In case of a full sync of e.g. 100 GB this will need _hours_.
Helmut Wollmersdorfer