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Mikhail Bautin updated HBASE-5010: ---------------------------------- Description: In ScanWildcardColumnTracker we have {code:java} this.oldestStamp = EnvironmentEdgeManager.currentTimeMillis() - ttl; ... private boolean isExpired(long timestamp) { return timestamp < oldestStamp; } {code} but this time range filtering does not participate in HFile selection. In one real case this caused next() calls to time out because all KVs in a table got expired, but next() had to iterate over the whole table to find that out. We should be able to filter out those HFiles right away. I think a reasonable approach is to add a "default timerange filter" to every scan for a CF with a finite TTL and utilize existing filtering in StoreFile.Reader.passesTimerangeFilter. was: In ScanWildcardColumnTracker we have { this.oldestStamp = EnvironmentEdgeManager.currentTimeMillis() - ttl; ... private boolean isExpired(long timestamp) { return timestamp < oldestStamp; } } but this time range filtering does not participate in HFile selection. In one real case this caused next() calls to time out because all KVs in a table got expired, but next() had to iterate over the whole table to find that out. We should be able to filter out those HFiles right away. I think a reasonable approach is to add a "default timerange filter" to every scan for a CF with a finite TTL and utilize existing filtering in StoreFile.Reader.passesTimerangeFilter. > Filter HFiles based on TTL > -------------------------- > > Key: HBASE-5010 > URL: https://issues.apache.org/jira/browse/HBASE-5010 > Project: HBase > Issue Type: Bug > Reporter: Mikhail Bautin > Assignee: Mikhail Bautin > > In ScanWildcardColumnTracker we have > {code:java} > > this.oldestStamp = EnvironmentEdgeManager.currentTimeMillis() - ttl; > ... > private boolean isExpired(long timestamp) { > return timestamp < oldestStamp; > } > {code} > but this time range filtering does not participate in HFile selection. In one > real case this caused next() calls to time out because all KVs in a table got > expired, but next() had to iterate over the whole table to find that out. We > should be able to filter out those HFiles right away. I think a reasonable > approach is to add a "default timerange filter" to every scan for a CF with a > finite TTL and utilize existing filtering in > StoreFile.Reader.passesTimerangeFilter. -- This message is automatically generated by JIRA. If you think it was sent incorrectly, please contact your JIRA administrators: https://issues.apache.org/jira/secure/ContactAdministrators!default.jspa For more information on JIRA, see: http://www.atlassian.com/software/jira