On Wed, Jan 16, 2019 at 1:21 AM Marvin Zhang <fanzier@xxxxxxxxx> wrote: > Hi CephFS experts, > From document, I know multi-fs within a cluster is still experiment feature. > 1. Is there any estimation about stability and performance for this feature? Remaining blockers [1] need completed. No developer has yet taken on this task. Perhaps by O release. > 2. It seems that each FS will consume at least 1 active MDS and > different FS can't share MDS. Suppose I want to create 10 FS , I need > at least 10 MDS. Is it right? Is ther any limit number for MDS within > a cluster? No limit on number of MDS but there is a limit on the number of actives (multimds). In the not-to-distant future, container orchestration platforms (e.g. Rook) underneath Ceph would provide a way to dynamically spin up new MDSs in response to the creation of a file system. [1] http://tracker.ceph.com/issues/22477 -- Patrick Donnelly
