Note: "permalinks" may not be as permanent as we would like,
direct links of old sources may well be a few messages off.
On Thu, 2010-04-15 at 16:26 +0200, Stefan Seifert wrote: > On Thursday 15 April 2010 16:00:26 Jiri Vitek wrote: > > > actualy i have drbd configured as: > > master/slave > > meta-disk: internal > > backd blockevice is sw raid.. /dev/md0 > > > > Now everything is working fine, but due to performance issue i need to > > migrate form sw raid6 level to raid5.. > > > > I have no problem with sw raid online resize. But when resize operation > > will finished, then backing device's size will grow up +250GB > > > > There is no chance to resize both nodes simultaneously with finish in > > the same time.. > > > > How will drbd handle this situation? when one backing device will be > > bigger then second one. > > drbd should handle different disk sizes just fine. Just follow the > instructuions in the user's guide for online resize. Do _not_ take a node > offline between RAID resize and drbd resize, as DRBD cannot find it's meta > data anymore in that case. > ok > You should also really, really consider putting your meta data on a RAID 1. > You'll only need a couple of megabytes, so even if you used all available > space on your disks for the RAID 6, there should be some /boot volume which > you can shrink a little. Putting your meta data on a RAID 1 instead of RAID 5 > or 6 alone should give you a nice performance boost. Maybe you could even > continue using RAID 6. good tip, change to external meta-data must be provided offline, right? > > Regards, > Stefan SEifert > _______________________________________________ > drbd-user mailing list > drbd-user at lists.linbit.com > http://lists.linbit.com/mailman/listinfo/drbd-user