Posts

Mirrored SAN vs. DRBD

Every now and then we get asked “why not simply use a mirrored SAN instead of DRBD”? This post shows some important differences. Read more

Trust, but verify

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[1. attributed either to Lenin or Kennedy] it might be a good idea to periodically test whether the nodes really have identical data, similar to the checks that are[1. or at least can be] done for RAID sets. Read more