Re: [ceph-users] Remote Journal

2014-10-31 Thread Mark Nelson
Hi Dan, I don't know why NBD wouldn't function, but I also don't think it's the way you should go. Putting the journals on the OSD disks isn't a terrible option, but you will suffer the expected double write penalty . If your system disk is an SSD with fast sequential write throughput capab

[ceph-users] Remote Journal

2014-10-31 Thread Dan Ryder (daryder)
Hi cephers, I'm designing a new "production-like" Ceph cluster, but I've run into an issue. I have 4 nodes with 1 disk for OS, 3 disks for OSDs on each node. However, I only have 2 extra disks for use of OSD journals. My first question is if it is possible to use a remote disk partition (curre