[ClusterLabs] DRBD or XtraDB?L
eric.robinson at psmnv.com
Mon Jun 7 09:21:45 EDT 2021
Looking for opinions here.
We've been using DRBD for 15 years successfully, but always on clusters with about 50 instances of MySQL running and 1TB of storage. Soon, we will refresh the environment and deploy much bigger servers with 100+ instances of MySQL and 15TB+ volumes. With DRBB, I'm getting more concerned about the filesystem itself being a SPOF and I'm looking for possible alternatives. What advantages or disadvantages would application layer replication (XtraDB) have versus replication at the block layer (DRBD)? Obviously, XtraDB avoids the problem of the filesystem getting corrupted across all DRBD volumes, but there may also be things that make it less than desirable in a Linux HA setup.
Thoughts, opinions, flames?
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