by Pawel | Apr 6, 2018 | ceph, sysadmin
It is not possible to take advantage of NVMe SSD bandwidth with single OSD. 4 is the optimum number of partitions per SSD drive that gives best possible performance.http://tracker.ceph.com/projects/ceph/wiki/Tuning_for_All_Flash_Deployments#NVMe-SSD-partitioning Ceph...
by Pawel | Apr 1, 2018 | ceph, sysadmin
All Ceph cluster administrators have probably already faced some level of disruption caused by deep scrubbing. Deep scrubs are ruining the performance for my clients! Should I disable them? Hold on a minute, let's make sure we understand what a scrub and deep scrub...
