Re: [ceph-devel] Scalability

2010-02-22 Thread Sage Weil
Hi Avishay, On Sun, 21 Feb 2010, Gregory Farnum wrote: > It's been a while since we've expressly tested scalability in Ceph, > because doing so is pretty hard -- it takes a lot of nodes. The most > recent figures I'm aware of come from an early version of the code > (2007) and are described in

Re: [ceph-devel] Scalability

2010-02-21 Thread Gregory Farnum
Avishay: It's been a while since we've expressly tested scalability in Ceph, because doing so is pretty hard -- it takes a lot of nodes. The most recent figures I'm aware of come from an early version of the code (2007) and are described in Sage's thesis (available at ceph.newdream.net), in which p

[ceph-devel] Scalability

2010-02-21 Thread Avishay Traeger
Hi, I was wondering if there was a limit to Ceph's scalability in terms of number of nodes (both MDS and OSD). What is the largest cluster that has been tested, and how well did performance scale? In addition, is there a rule of thumb for the size of the MDS cluster vs. the size of the OSD cluste