Also sending to the devel list to see if they have some insight. On Wed, Feb 25, 2015 at 3:01 PM, Robert LeBlanc <robert@xxxxxxxxxxxxx> wrote: > I tried finding an answer to this on Google, but couldn't find it. > > Since BTRFS can parallel the journal with the write, does it make > sense to have the journal on the SSD (because then we are forcing two > writes instead of one)? > > Our plan is to have a caching tier of SSDs in front of our rotational > HDDs and it sounds like the improvements in Hammer will really help > here. If we can take the journals off the SSDs, that just opens up a > bit more space for caching (albeit not much). It specifically makes > the configuration of the host much simpler and a single SSD doesn't > take out 5 HHDs. > > Thanks, > Robert LeBlanc _______________________________________________ ceph-users mailing list ceph-users@xxxxxxxxxxxxxx http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com
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