Note: "permalinks" may not be as permanent as we would like,
direct links of old sources may well be a few messages off.
On 8/18/11 7:15 AM, Gerald Brandt wrote: > Hi, > > Would it be possible to setup a DRBD system, with the primary being setup now (with heartbeat/pacemaker), and setting up the secondary a few months from now? I have a system running like this - You will need to invest some time (and downtime) to implement the second node in order to have time to test STONITH and other two-node features you can't do much with when you've only got one box. > > I understand there may be a lengthly sync period, but what are the other drawbacks/issues I'll run into? Assuming you have protected disk under DRBD and reliability is not an issue, running stand-alone DRBD is not a big deal - You might want to tweak the configs so when it comes up it does not wait forever for the second node (at least with the RedHat/Centos RPMs I've used, the default timeout is 0). The sync time is not a big deal - Both nodes can access the data while it is syncing, and you can rate limit it so it'll not impact your production IO very much. David