[Bugs] [Bug 1309462] Upgrade from 3.7.6 to 3.7.8 causes massive drop in write performance. Fresh install of 3.7.8 also has low write performance

[bugzilla at redhat.com]

https://bugzilla.redhat.com/show_bug.cgi?id=1309462

Oleksandr Natalenko <oleksandr at natalenko.name> changed:

           What    |Removed                     |Added
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                 CC|                            |oleksandr at natalenko.name



--- Comment #2 from Oleksandr Natalenko <oleksandr at natalenko.name> ---
I confirm the issue with 3.7.8 client working with replicated volume. However,
if the volume is not replicated, the issue does not rise.

Testing freshly created pure distributed volume shows 60–90 MB/s. Adding brick
for replica 2 with add-brick lowers throughput to 1–6 MB/s. Removing replica
brick with remove-brick brings throughput to 60–90 MB/s again.

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