Hi folks,
I am testing the replication performance of ceph-0.26 with
libceph, write 1G data in with ceph_write() and read it out with
ceph_read(),
rep_size 1 2
3 4
write： 78.8 MB/s 39.38 MB/s 27.7 MB/s
20.90 MB/s
read： 85.3 MB/s 85.33 MB/s 78.77MB/s
78.77MB/s
I think if the replication strategy is splay or primary copy, not the
chain, as the thesis said, writing speed for 3, 4 or even more
replication will be a little worse than 2 replication, should be near
with 39.38 MB/s.
But the write performance I got is affect so much by size of replication.
What is the replication strategy in ceph-0.26, not splay? If splay,
why not near with 39.38 MB/s?
There is 5 OSDs in 2 hosts, 2 in one and 3 int the other.
Thx!
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