Hey everyone, thank your very much for your feedback. Looks like the bottleneck was our test machine. We put the drive in another server and now the numbers look way better:
--numjobs=1 write: IOPS=14.3k, BW=55.9MiB/s (58.7MB/s)(3357MiB/60001msec) --numjobs=4 write: IOPS=26.5k, BW=103MiB/s (108MB/s)(6205MiB/60001msec) Best regards, Kai From: Martin Verges <[email protected]> Sent: Wednesday, 13 March 2019 19:34 To: Kai Wembacher <[email protected]> Cc: [email protected] Subject: Re: [ceph-users] Intel D3-S4610 performance Hello Kai, there are tons of bad SSDs on the market. You cannot buy any brand without having some bad and maybe some good models. Here as an example some performance values from Intel: Intel SSD DC S4600 960GB, 2.5", SATA (SSDSC2KG960G701) jobs=1 - iops=23k jobs=5 - iops=51k Intel SSD D3-S4510 960GB, 2.5", SATA (SSDSC2KB960G801) jobs=1 - iops=10k jobs=5 - iops=22k The Samsung PM863a you mentioned is quite a good SSD for general purpose and cost efficiency, unfortunately Samsung seems to no longer produce this drive and try to sell the PM883 instead. Performance seems to be near the same, and maybe it will be a good choice too. -- Martin Verges Managing director Mobile: +49 174 9335695 E-Mail: [email protected]<mailto:[email protected]> Chat: https://t.me/MartinVerges croit GmbH, Freseniusstr. 31h, 81247 Munich CEO: Martin Verges - VAT-ID: DE310638492 Com. register: Amtsgericht Munich HRB 231263 Web: https://croit.io YouTube: https://goo.gl/PGE1Bx Am Di., 12. März 2019 um 09:14 Uhr schrieb Kai Wembacher <[email protected]<mailto:[email protected]>>: Hi everyone, I have an Intel D3-S4610 SSD with 1.92 TB here for testing and get some pretty bad numbers, when running the fio benchmark suggested by Sébastien Han (http://www.sebastien-han.fr/blog/2014/10/10/ceph-how-to-test-if-your-ssd-is-suitable-as-a-journal-device/): Intel D3-S4610 1.92 TB --numjobs=1 write: IOPS=3860, BW=15.1MiB/s (15.8MB/s)(905MiB/60001msec) --numjobs=2 write: IOPS=7138, BW=27.9MiB/s (29.2MB/s)(1673MiB/60001msec) --numjobs=4 write: IOPS=12.5k, BW=48.7MiB/s (51.0MB/s)(2919MiB/60002msec) Compared to our current Samsung SM863 SSDs the Intel one is about 6x slower. Has someone here tested this SSD and can give me some values for comparison? Many thanks in advance, Kai _______________________________________________ ceph-users mailing list [email protected]<mailto:[email protected]> http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com
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