4 ms·
In my experience, on most SSDs/NVMEs, the firmware GC destroys performance under a heavy read/write load to the point of being no better than a mechanical HD of
by twiddlebits 6y ago
In my experience, on most SSDs/NVMEs, the firmware GC destroys performance under a heavy read/write load to the point of being no better than a mechanical HD of yore. Except Samsung and Intel. But Intel SSDs have bricked on me a lot. So now I just use Samsung NVMEs exclusively.
- PragmaticPulp 6y agoThis article tests that. Read down to the "Sequential Drive Fill" section.
- Jon_Lowtek 6y agoI would love to see some test how SLC caches interact with dmcrypt / mdadm / lvm - there are a lot of old rumors i believe are outdated by now
- the8472 6y agoProbably depends on whether you configure your storage layers to pass through TRIM commands.
- Jon_Lowtek 6y agoyes, that would be my guess, too
- mandis 6y agointeresting. Can you elaborate a bit on the problem? Perf downgrade to the level of HDD is crazy
- numpad0 6y agoThe version of explanation I have read is that it's SLC cache getting saturated(same deal as CMR cache region in DM-SMR except read/write can parallelize), and that it won't happen with enough cache amount and fast, parallel writes, so explanation differs but solution sounds right