Hello Cephers, We used to have a Ceph cluster and setup our data pool as 3 replicas, we estimated the number of files (given disk size and object size) for each PG was around 8K, we disabled folder splitting which mean all files located at the root PG folder. Our testing showed a good performance with such setup. Right now we are evaluating erasure coding, which split the object into a number of chunks and increase the number of files several times, although XFS claims a good support for large directories [1], some testing also showed that we may expect performance degradation for large directories. I would like to check with your experience on top of this for your Ceph cluster if you are using XFS. Thanks. [1] http://www.scs.stanford.edu/nyu/02fa/sched/xfs.pdf Thanks, Guang-- 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
