Hi Ceph community, I’d like to get a feel for some of the problems that CephFS users are encountering with single MDS deployments. There were requests for stable distributed metadata/MDS services [1] and I’m guessing its because your workloads exhibit many, many metadata operations. Some of you mentioned opening many files in a directory for checkpointing, recursive stats on a directory, etc. [2] and I’d like more details, such as: - workloads/applications that stress the MDS service that would cause you to call for multi-MDS support - use cases for the Ceph file system (I’m not really too interested in users using CephFS to host VMs, since many of these use cases are migrating to RBD) I’m just trying to get an idea of what’s out there and the problems CephFS users encounter as a result of a bottlenecked MDS (single node or cluster). Thanks! Michael [1] CephFS MDS Status Discussion, http://ceph.com/dev-notes/cephfs-mds-status-discussion/ [2] CephFS First Product Release Discussion, http://thread.gmane.org/gmane.comp.file-systems.ceph.devel/13524 -- To unsubscribe from this list: send the line "unsubscribe ceph-devel" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
