This may be too broad of a topic, or opening a can of worms, but we are
running a CEPH environment and I was wondering if there's any guidance
about this question:
Given that some group would like to store 50-100 TBs of data on CEPH and
use it from a linux environment, are there any advantages or
disadvantages in terms of performance/ease of use/learning curve to
using cephfs vs using a block device thru rbd vs using object storage
thru rgw? Here are my general thoughts:
cephfs - Until recently, you were not allowed to have multiple
filesystems. Not sure about performance.
rbd - Can only be mounted on one system at a time, but I guess that
filesystem could then be served using NFS.
rgw - A different usage model from regular linux file/directory
structure. Are there advantages to forcing people to use this interface?
I'm tempted to set up 3 separate areas and try them and compare the
results, but I'm wondering if somebody has done some similar experiment
in the past.
Thanks for any help you can provide!
Jorge
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