On 12/11/2014 11:39 AM, ano nym wrote:
>
> there is a ceph pool on a hp dl360g5 with 25 sas 10k (sda-sdy) on a
> msa70 which gives me about 600 MB/s continous write speed with rados
> write bench. tgt on the server with rbd backend uses this pool. mounting
> local(host) with iscsiadm, sdz is the virtual iscsi device. As you can
> see, sdz max out with 100%util at ~55MB/s when writing to it.
>
> I know that tgt-rbd is more a proof-of-concept then production-ready.
>
> Anyway, is someone using it and/or are there any hints to speed it up?
>
Increasing the tgt nr_threads setting helps. Try 64 or 128.
Do you just add this to the targets.conf?
nr_threads 128
I have seen my tgt implementation give me very good performance. Much better than lio and kernel rbd for certain workloads.
_______________________________________________ ceph-users mailing list ceph-users@xxxxxxxxxxxxxx http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com
