On Mon, 26 Jan 2015, Blinick, Stephen L wrote: > I noticed that the spec file for building RPM's defaults to building with libnss, instead of libcrypto++. Since the measurements I'd done so far were from those RPM's I rebuilt with libcrypto++.. so FWIW here is the difference between those two on my system, memstore backend with a single OSD, and single client. > > Dual socket Xeon E5 2620v3, 64GB Memory, RHEL7 > Kernel: 3.10.0-123.13.2.el7 > > 100% 4K Writes, 1xOSD w/ Rados Bench > libnss | Cryptopp > # QD IOPS Latency(ms) | IOPS Latency(ms) IOPS Improvement % > 16 14432.57 1.11 | 18896.60 0.85 30.93% > > 100% 4K Reads, 1xOSD w/ Rados Bench > libnss | Cryptopp # QD IOPS Latency(ms) | IOPS Latency(ms) IOPS > Improvement % 16 19532.53 0.82 | 25708.70 0.62 31.62% Yikes, 30%! I think this definitely worth some effort. We switched to libnss because it has the weird government certfiications that everyone wants and is more prevalent. crypto++ is also not packaged for Red Hat distros at all (presumably for that reason). I suspect that most of the overhead is in the encryption context setup and can be avoided with a bit of effort.. sage > > > Thanks, > > Stephen > > -----Original Message----- > From: ceph-devel-owner@xxxxxxxxxxxxxxx [mailto:ceph-devel-owner@xxxxxxxxxxxxxxx] On Behalf Of Sage Weil > Sent: Thursday, January 22, 2015 4:56 PM > To: andreas.bluemle@xxxxxxxxxxx > Cc: ceph-devel@xxxxxxxxxxxxxxx > Subject: wip-auth > > Hi Andreas, > > I took a look at the wip-auth I mentioned in the security call last week... and the patch didn't work at all. Sorry if you wasted any time trying it. > > Anyway, I fixed it up so that it actually worked and made one other optimization. It would be great to hear what latencies you measure with the changes in place. > > Also, it might be worth trying --with-cryptopp (or --with-nss if you built cryptopp by default) to see if there is a difference. There is a ton of boilerplate setting up encryption contexts and key structures and so on that I suspect could be cached (perhaps stashed in the CryptoKey struct?) with a bit of effort. See > > https://github.com/ceph/ceph/blob/master/src/auth/Crypto.cc#L99-L213 > > sage > -- > To unsubscribe from this list: send the line "unsubscribe ceph-devel" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html > > -- To unsubscribe from this list: send the line "unsubscribe ceph-devel" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
