Quanlong Huang has posted comments on this change. ( 
http://gerrit.cloudera.org:8080/16856 )

Change subject: IMPALA-10375: Lock down which filesystems use the file handle 
cache
......................................................................


Patch Set 1:

(2 comments)

http://gerrit.cloudera.org:8080/#/c/16856/1/be/src/runtime/io/scan-range.cc
File be/src/runtime/io/scan-range.cc:

http://gerrit.cloudera.org:8080/#/c/16856/1/be/src/runtime/io/scan-range.cc@200
PS1, Line 200:   if (is_file_handle_caching_enabled() && 
filesystem_supports_handle_caching(file()) &&
> We might need to be a bit careful about passing from frontend when it comes
Now more places (e.g. spilling to remote fs like s3) depend on the path prefix 
matching. So after we get HDFS-15289, we should change these as well:
https://github.com/apache/impala/blob/1dcd59638c340e2e1d167f7e8b21019e897893a9/be/src/util/hdfs-util.cc#L95-L118


http://gerrit.cloudera.org:8080/#/c/16856/1/be/src/runtime/io/scan-range.cc@201
PS1, Line 201: expected_local_
Can we simply change this to this?

 (expected_local_ && disk_id_ < io_mgr_->num_local_disks())



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Gerrit-Project: Impala-ASF
Gerrit-Branch: master
Gerrit-MessageType: comment
Gerrit-Change-Id: I136c3da9d19590cdbe8623d22480b8dd07192ce3
Gerrit-Change-Number: 16856
Gerrit-PatchSet: 1
Gerrit-Owner: Joe McDonnell <joemcdonn...@cloudera.com>
Gerrit-Reviewer: Impala Public Jenkins <impala-public-jenk...@cloudera.com>
Gerrit-Reviewer: Joe McDonnell <joemcdonn...@cloudera.com>
Gerrit-Reviewer: Quanlong Huang <huangquanl...@gmail.com>
Gerrit-Reviewer: Tim Armstrong <tarmstr...@cloudera.com>
Gerrit-Comment-Date: Mon, 12 Apr 2021 01:43:54 +0000
Gerrit-HasComments: Yes

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