fix(s3stream): fix the network out over-consumed (#2752) #2753
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Consider the following scenario: A Fetch request contains partitions P1 and P2. The data of P1 is in LogCache, while the data of P2 is not. First, a fast read will be attempted. At this time, P1 will return data and consume Network Out, and P2 will return a FastReadException. Due to the FastReadException, the entire Fetch attempts a slow read. At this time, both P1 and P2 return data and consume Network Out. At this point, the Network Out in step 2 is consumed repeatedly. Solution: Move the S3Stream network out consumption to ElasticReplicaManager. Avoid the network out traffic over-consumed, when there are mixin(tail read & catch-up read) partitions reading. Signed-off-by: Robin Han <[email protected]>
superhx
requested review from
Gezi-lzq,
1sonofqiu and
woshigaopp
as code owners
Gezi-lzq
approved these changes
Aug 13, 2025
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cherry-pick #2752