Jialin Qiao created IOTDB-98:
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Summary: Batch insertion in Server
Key: IOTDB-98
URL: https://issues.apache.org/jira/browse/IOTDB-98
Project: Apache IoTDB
Issue Type: Improvement
Reporter: Jialin Qiao
Currently, when the client sends a batch of statements (insert/delete) to the
server, the server will get each statement from the batch and execute one by
one. For each statement, the corresponding FileNodeProcessor (for a storage
group) will get a write lock and then execute the statement, which causes
unnecessary lock contention.
It can be improved by getting a write lock once and executing a batch of
statements. We can first consider the scenario that the statements in a batch
are all insertions.
The new process mainly contains 3 steps:
(1) Group the insert statement by storage group while retaining the original
order in the batch.
(2) For each storage group, get the write lock and execute all statements
belong to it.
(3) Set the return code of each statement to the origin position in the batch.
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