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https://issues.apache.org/jira/browse/FLINK-24918?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17444349#comment-17444349
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Aitozi commented on FLINK-24918:
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ps: I find I can use the \{{-Djava.io.tmpdir=/data/}} to change the root dir .
> Support to specify the data dir for state benchmark
> ----------------------------------------------------
>
> Key: FLINK-24918
> URL: https://issues.apache.org/jira/browse/FLINK-24918
> Project: Flink
> Issue Type: Improvement
> Components: Benchmarks, Runtime / State Backends
> Reporter: Aitozi
> Priority: Minor
>
> {{StateBackendBenchmarkUtils}} use null as the parent dir to create temp dir,
> which will finally use the /tmp as the data dir. It has two downsides:
> 1. the /tmp dir often mount with tmpfs, which may store data in memory. it
> will affect the result of rocksdb benchmark
> 2. It can not support to use benchmark to measure the performance on a new
> device.
> So I purpose to enhance the state benchmark to support specify the default
> data dir. And avoiding to use the {{/tmp}} as default.
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