João Eduardo Luís <jecluis <at> gmail.com> writes: > > On 03/13/2012 10:39 AM, madhusudhana wrote: > > Hi all, > > Can someone PLEASE help me to understand why data copying (simple cp > > or rsync) is SO slow in CEPH ? And delete command (\rm -rf) for removing > > a small (175M) directory is taking so much of time. Because of this, > > i am not able to complete evaluation of ceph using my actual workload. > > > > I am hereby requesting all to help me in finding out the reason for > > slow write/delete in my ceph cluster. I am really trying hard to > > complete the evaluation with actual workload but not able to copy the > > data whats required for evaluation to ceph cluster bcz of slow copy. > > > > I really appreciate any help on this. > > > > Thanks in advance > > Madhusudhan > > > > Hi Madhusudhan, > > Are you using Btrfs? And are you taking snapshots while you're > performing those operations? > Joao, Yes. all my OSD's are running on btrfs. I am not doing anything special except running 'cp' or 'rsync' command. can you please let me know how i can find if am taking snapshots while I do 'cp' or 'rsync' commands ? 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. Thanks -- To unsubscribe from this list: send the line "unsubscribe ceph-devel" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
