There is at least one benefit, you can go more dense. In our testing of real workloads, you can get a 12:1 OSD to Journal drive ratio (or even higher) using the P3700. This assumes you are willing to accept the impact of losing 12 OSDs when a journal croaks.
On Tue, Jul 7, 2015 at 8:33 AM, Andrew Thrift <[email protected]> wrote: > We are running NVMe Intel P3700's as journals for about 8 months now. > 1x P3700 per 6x OSD. > > So far they have been reliable. > > We are using S3700, S3710 and P3700 as journals and there is _currently_ > no real benefit of the P3700 over the SATA units as journals for Ceph. > > > Regards, > > > > > -- David Burley NOC Manager, Sr. Systems Programmer/Analyst Slashdot Media e: [email protected]
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