A question we see over and over again is
umount so slow? Why does it take so long?
Part of the answer was already given in an earlier blog post; here’s some more explanation. Continue reading
For the people who don’t already have DRBD 8.4.3 deployed: here’s another good reason — Performance. Continue reading
DRBD tries to ensure data integrity across different computers, and it’s quite good at it.
But, as per the old saying Trust, But Verify it might be a good idea to periodically test whether the nodes really have identical data, similar to the checks that are done for RAID sets. Continue reading
There is quite a bit of confusion about the DRBD configuration value
al-extents (activity log extents), so here’s another shot at explaining it. Continue reading
Similar to the recent post about setting the
vm.min_free_kbytes value there’s another sysctl that might improve the behaviour: the dirty ratio. Continue reading