Yu-Wen Lai created IMPALA-10923:
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Summary: Fine grained table refreshing for partition level events
Key: IMPALA-10923
URL: https://issues.apache.org/jira/browse/IMPALA-10923
Project: IMPALA
Issue Type: Improvement
Components: Catalog
Reporter: Yu-Wen Lai
Assignee: Yu-Wen Lai
For ensuring the transactional tables are consistent, we currently take whole
table refreshing even a change is just for a partition only. That is too
expensive and possibly make event processing has a longer delay.
To enable fine-grained table refreshing, there are three main changes in this
proposal.
# maintain validWriteIdList in Catalogd for transactional tables. We will
track write id changes by AllocWriteIdEvents, CommitTxnEvents, and
AbortTxnEvents.
# trigger partition level refreshing for addPartitionEvents,
dropPartitionEvents, and AlterPartitionEvents.
# Introduce a config *incremental_refresh_acid*, which can switch on/off the
fine-grained table refreshing
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