morningman opened a new pull request, #22634:
URL: https://github.com/apache/doris/pull/22634
## Proposed changes
In some cases, the high load of HDFS may lead to a long time to read the
data on HDFS,
thereby slowing down the overall query efficiency. HDFS Client provides
Hedged Read.
This function can start another read thread to read the same data when a
read request
exceeds a certain threshold and is not returned, and whichever is returned
first will use the result.
eg:
```
create catalog regression properties (
'type'='hms',
'hive.metastore.uris' = 'thrift://172.21.16.47:7004',
'dfs.client.hedged.read.threadpool.size' = '128',
'dfs.client.hedged.read.threshold.millis' = "500"
);
```
## Further comments
If this is a relatively large or complex change, kick off the discussion at
[[email protected]](mailto:[email protected]) by explaining why you
chose the solution you did and what alternatives you considered, etc...
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