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https://issues.apache.org/jira/browse/HDDS-13975?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Tsz-wo Sze updated HDDS-13975:
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Description:
In HDDS-13973, the client sends a single stream read block request and the
datanode will reply the entire block in multiple responses. However, the
client may read only a part of the block or read slowly. In such cases, the
datanode will queue up all the block data in the gRPC layer.
In this JIRA,
- add required length L to the request and then the datanode only replies L
bytes of data;
- support multiple checksums in a single response;
- support pre-read;
- change the datanode to open and close the block file only once per gRPC
stream.
was:
In HDDS-13973, the client sends a single stream read block request and the
datanode will reply the entire block in multiple responses. However, the
client may read only a part of the block or read slowly. In such cases, the
datanode will queue up all the block data in the gRPC layer.
In this JIRA,
- add required length L to the request and then the datanode only replies L
bytes of data;
- change a single response to support multiple checksums;
- support pre-read;
- change the datanode to open and close the block file only once per a gRPC
stream.
> Limit the number of responses in stream read block
> --------------------------------------------------
>
> Key: HDDS-13975
> URL: https://issues.apache.org/jira/browse/HDDS-13975
> Project: Apache Ozone
> Issue Type: Sub-task
> Components: Ozone Client, Ozone Datanode
> Reporter: Tsz-wo Sze
> Assignee: Tsz-wo Sze
> Priority: Major
>
> In HDDS-13973, the client sends a single stream read block request and the
> datanode will reply the entire block in multiple responses. However, the
> client may read only a part of the block or read slowly. In such cases, the
> datanode will queue up all the block data in the gRPC layer.
> In this JIRA,
> - add required length L to the request and then the datanode only replies L
> bytes of data;
> - support multiple checksums in a single response;
> - support pre-read;
> - change the datanode to open and close the block file only once per gRPC
> stream.
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