Linux
Ceph - Upgrade feature levels Paid Members Public
Upgrading distributed systems implies running everything so it's compatible. Ceph is using feature maps to ensure compatibility. This article shows how to ugprade the feature level of a ceph cluster.
Linux - i/o monitor and test tools Paid Members Public
This post shows a few tools that are useful to check for i/o issues on linux systems by watching current i/o or testing the subsystem explicitly.
