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[HIVE-6179] OOM occurs when query spans to a large number of partitions - Hive - [issue]
...When executing a query against a large number of partitions, such as "select count from table", OOM error may occur because Hive fetches the metadata for all partitions involved and tries to...
http://issues.apache.org/jira/browse/HIVE-6179    Author: Xuefu Zhang, 2014-09-01, 06:57
[HIVE-7438] Counters, statistics, and metrics [Spark Branch] - Hive - [issue]
...Hive makes use of MapReduce counters for statistics and possibly for other purposes. For Hive on Spark, we should achieve the same functionality using Spark's accumulators.Hive also collects...
http://issues.apache.org/jira/browse/HIVE-7438    Author: Xuefu Zhang, 2014-08-27, 15:56
[HIVE-7439] Spark job monitoring and error reporting [Spark Branch] - Hive - [issue]
...After Hive submits a job to Spark cluster, we need to report to user the job progress, such as the percentage done, to the user. This is especially important for long running queries. Moreov...
http://issues.apache.org/jira/browse/HIVE-7439    Author: Xuefu Zhang, 2014-08-25, 21:58
[HIVE-7384] Research into reduce-side join [Spark Branch] - Hive - [issue]
...Hive's join operator is very sophisticated, especially for reduce-side join. While we expect that other types of join, such as map-side join and SMB map-side join, will work out of the box w...
http://issues.apache.org/jira/browse/HIVE-7384    Author: Xuefu Zhang, 2014-08-22, 22:54
[HIVE-7593] Instantiate SparkClient per user session [Spark Branch] - Hive - [issue]
...SparkContext is the main class via which Hive talk to Spark cluster. SparkClient encapsulates a SparkContext instance. Currently all user sessions share a single SparkClient instance in Hive...
http://issues.apache.org/jira/browse/HIVE-7593    Author: Xuefu Zhang, 2014-08-22, 10:07
Hive on Spark - Apache Hive - Apache Software Foundation - Hive - [wiki]
...                    show comment                    hide comment   &nb...
https://cwiki.apache.org/confluence/display/Hive/Hive+on+Spark    Author: Xuefu Zhang, 2014-08-22, 00:00
[HIVE-7373] Hive should not remove trailing zeros for decimal numbers - Hive - [issue]
...Currently Hive blindly removes trailing zeros of a decimal input number as sort of standardization. This is questionable in theory and problematic in practice.1. In decimal context,  nu...
http://issues.apache.org/jira/browse/HIVE-7373    Author: Xuefu Zhang, 2014-08-21, 22:11
[HIVE-7334] Create SparkShuffler, shuffling data between map-side data processing and reduce-side processing [Spark Branch] - Hive - [issue]
...Please refer to the design spec....
http://issues.apache.org/jira/browse/HIVE-7334    Author: Xuefu Zhang, 2014-08-19, 04:28
[HIVE-7528] Support cluster by and distributed by [Spark Branch] - Hive - [issue]
...clustered by = distributed by + sort by, so this is related to HIVE-7527. If sort by is in place, the assumption is that we don't need to do anything about distributed by or clustered by. St...
http://issues.apache.org/jira/browse/HIVE-7528    Author: Xuefu Zhang, 2014-08-19, 04:10
[HIVE-7527] Support order by and sort by on Spark [Spark Branch] - Hive - [issue]
...Currently Hive depends completely on MapReduce's sorting as part of shuffling to achieve order by (global sort, one reducer) and sort by (local sort).Spark has a sort by transformation in di...
http://issues.apache.org/jira/browse/HIVE-7527    Author: Xuefu Zhang, 2014-08-19, 02:42
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