Alex Behm has uploaded a new change for review. http://gerrit.cloudera.org:8080/5743
Change subject: IMPALA-4789: Fix slow metadata loading due to inconsistent paths. ...................................................................... IMPALA-4789: Fix slow metadata loading due to inconsistent paths. The fix for IMPALA-4172/IMPALA-3653 introduced a performance regression for loading tables that have many partitions with: 1. inconsistent HDFS path qualification or 2. a custom location (not under the table root dir) For the first issue consider a table whose root path is at 'hdfs://localhost:8020/warehouse/tbl/'. A partition with an unqualified location '/warehouse/tbl/p=1' will not be recognized as being a descendant of the table root dir by FileSystemUtil.isDescendentPath() because of how Path.equals() behaves, even if 'hdfs://localhost:8020' is the default filesystem. Such partitions are incorrectly recognized as having a custom location and are treated specially. The treatment of such partitions is very inefficient. This patch fixes the detection of partitions with custom locations, and improves the speed of loading partitions with custom locations. Change-Id: I8c881b7cb155032b82fba0e29350ca31de388d55 --- M fe/src/main/java/org/apache/impala/catalog/HdfsTable.java M fe/src/main/java/org/apache/impala/common/FileSystemUtil.java 2 files changed, 35 insertions(+), 9 deletions(-) git pull ssh://gerrit.cloudera.org:29418/Impala-ASF refs/changes/43/5743/1 -- To view, visit http://gerrit.cloudera.org:8080/5743 To unsubscribe, visit http://gerrit.cloudera.org:8080/settings Gerrit-MessageType: newchange Gerrit-Change-Id: I8c881b7cb155032b82fba0e29350ca31de388d55 Gerrit-PatchSet: 1 Gerrit-Project: Impala-ASF Gerrit-Branch: master Gerrit-Owner: Alex Behm <[email protected]>
