Re: [ceph-users] Separate hosts for osd and its journal

Thanks for all the help on this! Regards, Mavis On Wed, Feb 10, 2016 at 6:00 PM, Bill Sanders wrote: > Going in a tiny bit more detail to what Michał said, one of the key > reasons for having the journal (in particular, to use SSD's) is to > reduce latency on writes

[ceph-users] Separate hosts for osd and its journal

Dear list, we have a cluster with 2 nodes, one have ssd and the other do not (host 1 has ssd and host 2 does not have), is there any possibility that host 2 can still use the ssd from host 1 for journaling? I see that we can change journal path in ceph.conf, but this is a path when journal and

Re: [ceph-users] Separate hosts for osd and its journal

"Remote journal"? No, don't do it even if it'd be possible via NFS or any kind of network-FS. You could always keep the journal on HDD (yes, I know it's not what You wanted to achieve, but I don't think that setting journal on remote machine would be a good idea in any way) Regards Michał

Re: [ceph-users] Separate hosts for osd and its journal

Going in a tiny bit more detail to what Michał said, one of the key reasons for having the journal (in particular, to use SSD's) is to reduce latency on writes (the other being a replay in the event of a crash). Even if the functionality existed, adding a network trip to this would be detrimental