Mostafa Mokhtar has posted comments on this change. ( http://gerrit.cloudera.org:8080/8235 )
Change subject: IMPALA-5429: Multi threaded block metadata loading ...................................................................... Patch Set 5: (3 comments) http://gerrit.cloudera.org:8080/#/c/8235/5/be/src/catalog/catalog.cc File be/src/catalog/catalog.cc: http://gerrit.cloudera.org:8080/#/c/8235/5/be/src/catalog/catalog.cc@42 PS5, Line 42: DEFINE_int32(max_s3_parts_parallel_load, 10, I would be more aggressive with this parameter and put it at 20. http://gerrit.cloudera.org:8080/#/c/8235/5/fe/src/main/java/org/apache/impala/catalog/HdfsTable.java File fe/src/main/java/org/apache/impala/catalog/HdfsTable.java: http://gerrit.cloudera.org:8080/#/c/8235/5/fe/src/main/java/org/apache/impala/catalog/HdfsTable.java@787 PS5, Line 787: int threadPoolSize = FileSystemUtil.supportsStorageIds(tableFs) ? What is the expected behavior for tables with mixed FSs? As a mix of S3 and HDFS partitions. http://gerrit.cloudera.org:8080/#/c/8235/5/fe/src/main/java/org/apache/impala/catalog/HdfsTable.java@801 PS5, Line 801: getLoadingThreadPoolSize > can different partitions have different number of files? if so, work across Parallelization of metadata loading is done on per partition granularity. -- To view, visit http://gerrit.cloudera.org:8080/8235 To unsubscribe, visit http://gerrit.cloudera.org:8080/settings Gerrit-Project: Impala-ASF Gerrit-Branch: master Gerrit-MessageType: comment Gerrit-Change-Id: I07eaa7151dfc4d56da8db8c2654bd65d8f808481 Gerrit-Change-Number: 8235 Gerrit-PatchSet: 5 Gerrit-Owner: Bharath Vissapragada <bhara...@cloudera.com> Gerrit-Reviewer: Bharath Vissapragada <bhara...@cloudera.com> Gerrit-Reviewer: Dimitris Tsirogiannis <dtsirogian...@cloudera.com> Gerrit-Reviewer: Jim Apple <jbapple-imp...@apache.org> Gerrit-Reviewer: Mostafa Mokhtar <mmokh...@cloudera.com> Gerrit-Reviewer: Vuk Ercegovac <vercego...@cloudera.com> Gerrit-Comment-Date: Thu, 12 Oct 2017 04:51:55 +0000 Gerrit-HasComments: Yes
