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[HIVE-12515] Clean the SparkCounters related code after remove counter based stats collection[Spark Branch] - Hive - [issue]
...As SparkCounters is only used to collection stats, after HIVE-12411, we does not need it anymore....
http://issues.apache.org/jira/browse/HIVE-12515    Author: Chengxiang Li, 2015-11-27, 09:48
[HIVE-10238] Loop optimization for SIMD in IfExprColumnColumn.txt - Hive - [issue]
...The ?: operator as following could not be vectorized in loop, we may transfer it into mathematical expression.for(int j = 0; j != n; j++) {      int i = sel[j];    &...
http://issues.apache.org/jira/browse/HIVE-10238    Author: Chengxiang Li, 2015-09-24, 06:17
[HIVE-10179] Optimization for SIMD instructions in Hive - Hive - [issue]
...SIMD instuctions could be found in most of current CPUs, such as Intel's SSE2, SSE3, SSE4.x, AVX and AVX2, and it would help Hive to outperform if we can vectorize the mathematical manipulat...
http://issues.apache.org/jira/browse/HIVE-10179    Author: Chengxiang Li, 2015-08-11, 10:31
[HIVE-11204] Research on recent failed qtests[Spark Branch] - Hive - [issue]
...Found some strange failed qtests in HIVE-11053 Hive QA, as it's pretty sure that failed qtests are not related to HIVE-11053 patch, so just reproduce and research it here.Failed tests:org.ap...
http://issues.apache.org/jira/browse/HIVE-11204    Author: Chengxiang Li, 2015-08-05, 01:13
[HIVE-11082] Support multi edge between nodes in SparkPlan[Spark Branch] - Hive - [issue]
...For Dynamic RDD caching optimization, we found SparkPlan::connect throw exception while we try to combine 2 works with same child, support multi edge between nodes in SparkPlan would help to...
http://issues.apache.org/jira/browse/HIVE-11082    Author: Chengxiang Li, 2015-08-02, 04:39
[HIVE-11053] Add more tests for HIVE-10844[Spark Branch] - Hive - [issue]
...Add some test cases for self union, self-join, CWE, and repeated sub-queries to verify the job of combining quivalent works in HIVE-10844....
http://issues.apache.org/jira/browse/HIVE-11053    Author: Chengxiang Li, 2015-08-02, 04:34
[HIVE-10844] Combine equivalent Works for HoS[Spark Branch] - Hive - [issue]
...Some Hive queries(like TPCDS Q39) may share the same subquery, which translated into sperate, but equivalent Works in SparkWork, combining these equivalent Works into a single one would help...
http://issues.apache.org/jira/browse/HIVE-10844    Author: Chengxiang Li, 2015-08-02, 04:24
[HIVE-9449] Push YARN configuration to Spark while deply Spark on YARN [Spark Branch] - Hive - [issue]
...We only push Spark configuration and RSC configuration to Spark while launch Spark cluster now, for Spark on YARN mode, Spark need extra YARN configuration to launch Spark cluster. Besides t...
http://issues.apache.org/jira/browse/HIVE-9449    Author: Chengxiang Li, 2015-07-18, 20:25
[HIVE-11267] Combine equavilent leaf works in SparkWork[Spark Branch] - Hive - [issue]
...There could be multi leaf works in SparkWork, like self-union query. If the subqueries are same with each other, we may combine the subqueries, and just execute once, then fetch twice in Fet...
http://issues.apache.org/jira/browse/HIVE-11267    Author: Chengxiang Li, 2015-07-16, 03:13
[HIVE-10550] Dynamic RDD caching optimization for HoS.[Spark Branch] - Hive - [issue]
...A Hive query may try to scan the same table multi times, like self-join, self-union, or even share the same subquery, TPC-DS Q39 is an example. As you may know that, Spark support cache RDD ...
http://issues.apache.org/jira/browse/HIVE-10550    Author: Chengxiang Li, 2015-06-01, 22:16
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elasticsearch, apache solr, apache hbase, hadoop, redis, casssandra, amazon cloudwatch, mysql, memcached, apache kafka, apache zookeeper, apache storm, ubuntu, centOS, red hat, debian, puppet labs, java, senseiDB