Hi,
RBD mount
ceph v0.94.5
6 OSD with 9 HDD each
10 GBit/s public and private networks
3 MON nodes 1Gbit/s network
A rbd mounted with btrfs filesystem format performs really badly when
reading. Tried readahead in all combinations but that does not help in
any way.
Write rates are very good in excess of 600 MB/s up to 1200 MB/s, average
800 MB/s
Read rates on the same mounted rbd are about 10-30 MB/s !?
Of course, both writes and reads are from a single client machine with a
single write/read command. So I am looking at single threaded performance.
Actually, I was hoping to see at least 200-300 MB/s when reading, but I
am seeing 10% of that at best.
Thanks for your help.
Mike
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