[
https://issues.apache.org/jira/browse/PHOENIX-7229?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Viraj Jasani updated PHOENIX-7229:
----------------------------------
Fix Version/s: 5.2.0
> Leverage bloom filters for single key point lookups
> ---------------------------------------------------
>
> Key: PHOENIX-7229
> URL: https://issues.apache.org/jira/browse/PHOENIX-7229
> Project: Phoenix
> Issue Type: Improvement
> Affects Versions: 5.1.3
> Reporter: Tanuj Khurana
> Assignee: Tanuj Khurana
> Priority: Major
> Fix For: 5.2.0
>
>
> PHOENIX-6710 enabled bloom filters by default when Phoenix tables are
> created. However, we were not making use of it because Phoenix translates
> point lookups to scans with the scan range [startkey, stopkey) where startkey
> is inclusive and is equal to the row key and stopkey is exclusive and is the
> next key after the row key.
> This fails the check inside the hbase code in
> [StoreFileReader#passesBloomFilter|https://github.com/apache/hbase/blob/master/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/StoreFileReader.java#L245-L250]
> because it applies bloom filter only to scans which are gets and a scan is a
> GET only if startkey = stopkey and both are inclusive. This is defined here
> [Scan#isGetScan|https://github.com/apache/hbase/blob/master/hbase-client/src/main/java/org/apache/hadoop/hbase/client/Scan.java#L253-L255]
> We recently have some customers whose use case involves doing point lookups
> where the row key is not going to be present in the table. Bloom filters are
> ideal for those use cases.
> We can change our scan range for point lookups to leverage Bloom filters.
--
This message was sent by Atlassian Jira
(v8.20.10#820010)
