Hi,
I read here in the documentation:
http://docs.ceph.com/docs/master/architecture/#erasure-coding
"In an erasure coded pool, the primary OSD in the up set receives all
write operations. "
I dont' find what happens with read operations. Does the client contact
the primary and does this OSD collect the object, or does the client
decode the data of the ecpool itself?
Another question: When using cephfs with it, we have to use a cache pool
on top of it. But this forms a huge bottleneck for read-only operations.
Is it possible to use the ec pool directly and bypass the cache for
read-only mounts/ scenarios ?
One such a use case would be to read out cephfs snapshots.
Another question about using caches with erasure code: Is it
configurable to have some kind of affinity between the Primary OSD of
the ecpool and the cache OSD. This to limit network traffic when
flushing data from the cache.
Many thanks !!
Kenneth
_______________________________________________
ceph-users mailing list
ceph-users@xxxxxxxxxxxxxx
http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com
