Hi, does the CephFS kernel module (as of kernel version 4.8.8) support parallel reads of file stripes? When an application requests a 500MB block from a file (which is splitted into multiple objects and stripes on different OSDs) at once, does the CephFS kernel client request these blocks in parallel?
My benchmarks suggest it does not (there is no significant difference in throughput whether I'm reading a file in chunks of 64 KB, 500 MB or 1 GB blocks). In the architecture docs [1] under the protocol section data striping and the resulting performance gains are explained - but I'm not sure if this means that this optimization is already implemented in the current CephFS kernel module or not. [1] http://docs.ceph.com/docs/master/architecture/#data-striping Thanks, Andreas _______________________________________________ ceph-users mailing list ceph-users@lists.ceph.com http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com
