[jira] [Closed] (IOTDB-98) Batch insertion in Server

["Jialin Qiao (Jira)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/IOTDB-98?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Jialin Qiao closed IOTDB-98.
----------------------------
    Resolution: Done

> 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
>            Priority: Minor
>
> 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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