szetszwo opened a new pull request, #5752:
URL: https://github.com/apache/ozone/pull/5752
## What changes were proposed in this pull request?
Today DataNode deserializes request proto at every callback method:
applyTransaction, applyTransaction, writeTransaction, readTransaction.
For a transaction, the deserialzation happens more than 5 times
(readTransaction happens twice for leader)
It's super expensive. We should deserialize only once during
preAppendTransaction() which takes place in parallel.
## What is the link to the Apache JIRA
HDDS-9365
## How was this patch tested?
Existing unit tests.
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