Will Berkeley has posted comments on this change.

Change subject: KUDU-1755 Part 2: Improve tablet on-disk size metric
......................................................................


Patch Set 19:

(1 comment)

http://gerrit.cloudera.org:8080/#/c/6968/19/src/kudu/tablet/diskrowset.h
File src/kudu/tablet/diskrowset.h:

PS19, Line 348:   // A rowset's space-occupying components are as follows:
              :   // - cfile set
              :   //   - base data
              :   //   - bloom file
              :   //   - ad hoc index
              :   // - delta files
              :   //   - UNDO deltas
              :   //   - REDO deltas
              : 
              :   // Return the size on-disk of this rowset, in bytes.
              :   uint64_t OnDiskSize() const OVERRIDE;
              : 
              :   // Return the on-disk size of this rowset's cfile set, in 
bytes.
              :   uint64_t CFileSetOnDiskSize() const;
              : 
              :   // Return the size on-disk of the base data (no deltas) in 
this rowset's cfile set, in bytes.
              :   uint64_t OnDiskDataSize() const OVERRIDE;
              : 
              :   // Return the size on-disk of this rowset's REDO deltas, in 
bytes.
              :   uint64_t RedoDeltaOnDiskSize() const;
              : 
              :   // Return the size on-disk of this rowset's cfile set's base 
data and this rowset's REDO deltas.
              :   uint64_t OnDiskDataSizeNoUndos() const OVERRIDE;
              : 
              :   size_t DeltaMemStoreSize() const OVERRIDE;
> a possible alternative would be to have individual methods for each of the 
I added a struct as you suggested. I think it simplifies things a lot-- there's 
now only three on disk size methods in rowset.h, one for the disk size metric, 
one for the data-only disk size metric, and one used in compaction scoring; the 
struct can be used internally to the disk row set to compute whatever other 
permutation of space usage might be needed. Thanks for the suggestion!


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Gerrit-MessageType: comment
Gerrit-Change-Id: Ia83f8aae0a544abbd19f5a34520b4828b89b6315
Gerrit-PatchSet: 19
Gerrit-Project: kudu
Gerrit-Branch: master
Gerrit-Owner: Will Berkeley <wdberke...@gmail.com>
Gerrit-Reviewer: Adar Dembo <a...@cloudera.com>
Gerrit-Reviewer: Alexey Serbin <aser...@cloudera.com>
Gerrit-Reviewer: Andrew Wong <aw...@cloudera.com>
Gerrit-Reviewer: David Ribeiro Alves <davidral...@gmail.com>
Gerrit-Reviewer: Kudu Jenkins
Gerrit-Reviewer: Mike Percy <mpe...@apache.org>
Gerrit-Reviewer: Tidy Bot
Gerrit-Reviewer: Todd Lipcon <t...@apache.org>
Gerrit-Reviewer: Will Berkeley <wdberke...@gmail.com>
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