Hello Quanlong Huang, Csaba Ringhofer, Impala Public Jenkins,
I'd like you to reexamine a change. Please visit
http://gerrit.cloudera.org:8080/20979
to look at the new patch set (#9).
Change subject: IMPALA-12607: Bump the GBN and fetch events specific to the
db/table from the metastore
......................................................................
IMPALA-12607: Bump the GBN and fetch events specific to the db/table
from the metastore
Bump the GBN to 49623641 to leverage HIVE-27499, so that Impala can
directly fetch the latest events specific to the db/table from the
metastore, instead of fetching the events from metastore and then
filtering in the cache matching the DbName/TableName.
Implementation Details:
Currently when a DDL/DML is performed in Impala, we fetch all the
events from metastore based on current eventId and then filter them in
Impala which can be a bottleneck if the events count is huge. This can
be optimized by including db name and/or table name in the notification
event request object and then filter by event type in impala. This can
provide performance boost on tables that generate a lot of events.
Testing:
1) Did some tests in local cluster
2) Added a test case in MetaStoreEventsProcessorTest
Change-Id: I6aecd5108b31c24e6e2c6f9fba6d4d44a3b00729
---
M bin/impala-config.sh
M
fe/src/main/java/org/apache/impala/catalog/events/MetastoreEventsProcessor.java
M
fe/src/test/java/org/apache/impala/catalog/events/MetastoreEventsProcessorTest.java
M
fe/src/test/java/org/apache/impala/catalog/metastore/CatalogHmsSyncToLatestEventIdTest.java
4 files changed, 194 insertions(+), 33 deletions(-)
git pull ssh://gerrit.cloudera.org:29418/Impala-ASF refs/changes/79/20979/9
--
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Gerrit-Project: Impala-ASF
Gerrit-Branch: master
Gerrit-MessageType: newpatchset
Gerrit-Change-Id: I6aecd5108b31c24e6e2c6f9fba6d4d44a3b00729
Gerrit-Change-Number: 20979
Gerrit-PatchSet: 9
Gerrit-Owner: Sai Hemanth Gantasala <saihema...@cloudera.com>
Gerrit-Reviewer: Csaba Ringhofer <csringho...@cloudera.com>
Gerrit-Reviewer: Impala Public Jenkins <impala-public-jenk...@cloudera.com>
Gerrit-Reviewer: Quanlong Huang <huangquanl...@gmail.com>
Gerrit-Reviewer: Sai Hemanth Gantasala <saihema...@cloudera.com>
