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Posted to issues@flink.apache.org by "ASF GitHub Bot (JIRA)" <ji...@apache.org> on 2019/01/07 12:47:00 UTC
[jira] [Updated] (FLINK-11167) Optimize RocksDBList#put for no
empty input
[ https://issues.apache.org/jira/browse/FLINK-11167?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
ASF GitHub Bot updated FLINK-11167:
-----------------------------------
Labels: pull-request-available (was: )
> Optimize RocksDBList#put for no empty input
> -------------------------------------------
>
> Key: FLINK-11167
> URL: https://issues.apache.org/jira/browse/FLINK-11167
> Project: Flink
> Issue Type: Improvement
> Components: State Backends, Checkpointing
> Reporter: Congxian Qiu
> Assignee: Congxian Qiu
> Priority: Major
> Labels: pull-request-available
>
> In `RocksDBListState.putInternal` we will first remove the current state and then add the new list if needed(list is no empty) such as below.
> I think if the list is not empty, we could {color:#FF0000}skip the remove operation{color}.
>
> {code:java}
> public void updateInternal(List<V> values) {
> Preconditions.checkNotNull(values, "List of values to add cannot be null.");
> clear();
> if (!values.isEmpty()) {
> try {
> writeCurrentKeyWithGroupAndNamespace();
> byte[] key = dataOutputView.getCopyOfBuffer();
> byte[] premerge = getPreMergedValue(values, elementSerializer, dataOutputView);
> backend.db.put(columnFamily, writeOptions, key, premerge);
> } catch (IOException | RocksDBException e) {
> throw new FlinkRuntimeException("Error while updating data to RocksDB", e);
> }
> }
> }
> {code}
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