Deneche A. Hakim
Ramana Inukonda Nagaraj
Abdel Hakim Deneche
Sean Hsuan-Yi Chu
Julien Le Dem
Hsuan Yi Chu
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[DRILL-4891] Use field width when available for computing estimated memory costing
...Drill currently uses an average field width (in addition to other parameters) for computing estimated memory cost for hash and sort based operations. The assumption is that the field i...
, 2016-09-14, 17:55
[DRILL-4857] When no partition pruning occurs with metadata caching there's a performance regression
...After DRILL-4530, we see the (expected) performance improvements in planning time with metadata cache for cases where partition pruning got applied. However, in cases where it did not ...
, 2016-09-13, 18:20
[DRILL-4846] Eliminate extra operations during metadata cache pruning
...While doing performance testing for DRILL-4530 using a new data set and queries, we found two potential performance issues: (a) the metadata cache was being read twice in some cases and (b) ...
, 2016-09-13, 18:19
Re: [DISCUSS] - Design Docs
- [mail # dev]
...+1 on using a design doc template for features that are of moderate orhigher complexity. Many of the sections are optional, so it shouldhopefully be considered 'lightweight' enough to...
, 2016-09-07, 06:13
[DRILL-4833] Union-All with a small cardinality input on one side does not get parallelized
...When a Union-All has an input that is a LIMIT 1 (or some small value relative to the slice_target), and that input is accessing Parquet files, Drill does an optimization where a single Parqu...
, 2016-08-29, 17:30
Re: [VOTE] Release Apache Drill 1.8.0 - rc1
- [mail # dev]
...+1 (binding)Downloaded source and binary tarballs.Verified git.properties and README.On Linux VM: Built from source and ran unit tests.On Mac: Installed binary release and ran in embed...
, 2016-08-26, 15:58
[DRILL-4861] Revisit the 'entries' stored as part of ParquetGroupScan
...The ParquetGroupScan stores a list of ReadEntryWithPath in the form of 'entries' field as well as a hash set of file names in the 'fileSet' field.The underlying data stored by both is ...
, 2016-08-24, 01:12
[DRILL-4794] Regression: Wrong result for query with disjunctive partition filters
...For a query that contains certain types of disjunctive filter conditions such as 'dir0=x OR dir1=y' we get wrong result when metadata caching is used. This is a regression due to...
, 2016-08-22, 20:37
[DRILL-4786] Improve metadata cache performance for queries with multiple partitions
...Consider queries of the following type run against Parquet data with metadata caching: SELECT col FROM `A` WHERE dir0 = 'B`' AND dir1 IN ('1', '2', '3')For such queries, Drill w...
, 2016-08-18, 17:32
[DRILL-4530] Improve metadata cache performance for queries with single partition
...Consider two types of queries which are run with Parquet metadata caching: query 1:SELECT col FROM `A/B/C`;query 2:SELECT col FROM `A` WHERE dir0 = 'B' AND dir1 = 'C';For a certain dat...
, 2016-08-17, 20:42
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