hey,<br>I`m planning to setup drbd (8.3) on existing (ext3) paritions in primary-secondary mode.<br>The main problem here for me is - I wanted to avoid initial syncing of data by drbd since I`ve lots of data (~4TB) and we can`t afford more than 30 mins downtime for our services. So, I`m planning to skip this initial sync by drbd and use "rsync" ( which takes about 15 mins) instead to make sure the two servers are in sync and by generating new uuids to fool drbd think that underlying block devices are in sync.<br>
Another catch here is underlying block devices do not have same disk layout.( probably I can set drbd device size to the minimum of those two block device size? ) <br><br>Can I assume this way of avoiding inital sync`ing by drbd and using rsync would guarantee consistent mirroring as seen by drbd? Will I see any problems when I promote my secondary server to primary?<br>
My understanding is that rsync identifies file level changes and syncs though it replicates only blocks modified. <br><br><br>tia,<br>Krishna<br>