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backup: --ratelimit
doesn't work as intended
#1007
Comments
The documentation states that
So we either fix TiKV or the doc. |
If we set |
it is solved only if the ranges are distributed evenly, otherwise we'll get a slow long-tail. |
Then how about we set |
v4.0.14 |
Please answer these questions before submitting your issue. Thanks!
What did you do?
If possible, provide a recipe for reproducing the error.
Backup with
--ratelimit 8
in a cluster with one TiKV.What did you expect to see?
The speed should less than 8MB/s.
What did you see instead?
The speed is 28.30MB/s. And the table below shows the relation among ratelimit, concurrency and real speed.
Workload: TPCC 10 warehouses(about 1GB).
tiup v5.0.0
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