Dan Hecht has posted comments on this change. ( 
http://gerrit.cloudera.org:8080/8966 )

Change subject: IMPALA-4835: Part 3: switch I/O buffers to buffer pool
......................................................................


Patch Set 20:

(1 comment)

http://gerrit.cloudera.org:8080/#/c/8966/20/fe/src/main/java/org/apache/impala/planner/HdfsScanNode.java
File fe/src/main/java/org/apache/impala/planner/HdfsScanNode.java:

http://gerrit.cloudera.org:8080/#/c/8966/20/fe/src/main/java/org/apache/impala/planner/HdfsScanNode.java@177
PS20, Line 177:   // The ideal reservation to process a single input split, >= 
the minimum reservation.
> Let's use consistently use "scan range" instead of "input split" to avoid c
Actually, we were having trouble distinguishing between "frontend" scan ranges 
and scan ranges that would ultimately be operated on by the DiskIoMgr.  And so 
were using "input split" vs "IoMgr scan range" to make that distinction, 
because it's an important distinction for understanding this code.  Do you have 
another suggestion for terminology?



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Gerrit-Project: Impala-ASF
Gerrit-Branch: master
Gerrit-MessageType: comment
Gerrit-Change-Id: Ic09c6196b31e55b301df45cc56d0b72cfece6786
Gerrit-Change-Number: 8966
Gerrit-PatchSet: 20
Gerrit-Owner: Tim Armstrong <tarmstr...@cloudera.com>
Gerrit-Reviewer: Alex Behm <alex.b...@cloudera.com>
Gerrit-Reviewer: Bikramjeet Vig <bikramjeet....@cloudera.com>
Gerrit-Reviewer: Dan Hecht <dhe...@cloudera.com>
Gerrit-Reviewer: Tim Armstrong <tarmstr...@cloudera.com>
Gerrit-Comment-Date: Wed, 21 Feb 2018 23:54:56 +0000
Gerrit-HasComments: Yes

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