Github user keith-turner commented on the pull request:
https://github.com/apache/accumulo/pull/75#issuecomment-189376744
I think this change will result in a RPC per thread using the batch writer.
If 3 threads add mutations for the same tablet server, then it will no
longer send all of those in one RPC. If 100 threads add mutations for 100
tablets server, the batch writer will make ~10,000 RPCs instead of ~100.
I have some idea on how to improve the batch writer based on what I learned
while writing the conditional writer, I will try to write those up. It may or
may not be useful.
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