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https://issues.apache.org/jira/browse/HDDS-3630?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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runzhiwang updated HDDS-3630:
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Attachment: Merge RocksDB in Datanode-v2.pdf
> Merge rocksdb in datanode
> -------------------------
>
> Key: HDDS-3630
> URL: https://issues.apache.org/jira/browse/HDDS-3630
> Project: Hadoop Distributed Data Store
> Issue Type: Sub-task
> Reporter: runzhiwang
> Assignee: runzhiwang
> Priority: Major
> Attachments: Merge RocksDB in Datanode-v1.pdf, Merge RocksDB in
> Datanode-v2.pdf
>
>
> Currently, one rocksdb for one container. one container has 5GB capacity.
> 10TB data need more than 2000 rocksdb in one datanode. It's difficult to
> limit the memory of 2000 rocksdb. So maybe we should limited instance of
> rocksdb for each disk.
> The design of improvement is in the follow link, but still is a draft.
> TODO:
> 1. compatibility with current logic i.e. one rocksdb for each container
> 2. measure the memory usage before and after improvement
> 3. effect on efficiency of read and write.
> https://docs.google.com/document/d/18Ybg-NjyU602c-MYXaJHP6yrg-dVMZKGyoK5C_pp1mM/edit#
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