> I am yet to fully understand Ceph's behavior, thus you should not take my > word on it, but I believe Ceph will > automatically take snapshots as a checkpointing mechanism. So, until someone (*looks at Sage*) > declares I am completely and utterly wrong, I'm going with that assumption. > > Also, I am not sure if the slowdown you're suffering is Btrfs-related, but just in case... > > > > > One more concern is 'rm' command is also TOO slow. I am a newbie here and > > i don't know to much about ceph working. I configured it in a simple way. > > Install ceph and run mkcephfs and start ceph in all the servers in the > > cluster. > > > > I want to understand why basic operations like 'cp' and 'rm' are slow bcz > > my actual workload does a lot of copy and delete operation. If I find the > > reason for the slowness and get a fix, then I think i can better compare > > and > > complete my ceph evaluation. > > My follow up questions: > > - Are you copying into Ceph? From within Ceph, into Ceph? Or are you simply copying from Ceph to somewhere else? Am copying data from a linux machine to ceph. Bot cp and rsync are really really slow > > - Under which conditions do these slowdowns happen? Are you performing *a > lot* of cp's / rm's in a short > amount of time? Its doesn't matter whether i am doing cp/rm in a short. Whenever i run those commands they run really slow. > > Cheers, > Joao
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