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> I've seen enterprise SSDs that perform worse with sync IO than spinning disks. Can you elaborate on this? Specific brands to avoid? How and why they are wors
by 10000truths 5y ago
> I've seen enterprise SSDs that perform worse with sync IO than spinning disks.
Can you elaborate on this? Specific brands to avoid? How and why they are worse?
- antongribok 5y agoSee this blog post for some data at the end: https://www.sebastien-han.fr/blog/2014/10/10/ceph-how-to-test-if-your-ssd-is-suitable-as-a-journal-device/ https://www.sebastien-han.fr/blog/2014/10/10/ceph-how-to-tes... The post is from 2014, but the performance data was updated for many years after that. As you can see, there is not really 1 brand to single out. That Micron P400e was a pain to swap out in production, and if you use consumer drives there is even worse out there. Note: this post is on something very specific about Ceph, but the idea translates to any other workload that does syncs (including LVM cache scenarios).