Jinzhong Li created FLINK-34981:
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Summary: FLIP-426: Grouping Remote State Access
Key: FLINK-34981
URL: https://issues.apache.org/jira/browse/FLINK-34981
Project: Flink
Issue Type: New Feature
Components: Runtime / State Backends
Reporter: Jinzhong Li
Fix For: 2.0.0
This is a sub-FLIP for the disaggregated state management and its related work,
please read the [FLIP-423|https://cwiki.apache.org/confluence/x/R4p3EQ] first
to know the whole story.
I/O speed and latency are critical for overall data throughput, particularly in
jobs that manage large states. Implementing multiple asynchronous I/O
operations is a proven strategy to enhance throughput by increasing parallelism
of I/O execution. However, simply expanding I/O parallelism can quickly hit a
ceiling due to finite I/O bandwidth. Additionally, when it comes to remote
storage access, the time taken for RPC round trips significantly outweighs the
impact of I/O size on individual I/O performance. So a promising optimization
is to merge adjacent I/O requests into a single operation and fetch multiple
keys with one I/O call. This approach requires a pre-prepared batch of keys for
the query and the identification of I/O operations that can be combined. In
this FLIP, we focus on the implementation details for batching state requests
and processing them in batches.
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