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Karthik Ranganathan commented on HBASE-6874: -------------------------------------------- Actually did this analysis and enhancement for an online analytics use-case as well (and search indexing), and most of what you say maps one to one. The only difference I guess is that so far we are not heavily relying on server side filtering much, so decided on punting on the prefetching=n case for now (we actually discussed this). > Implement prefetching for scanners > ---------------------------------- > > Key: HBASE-6874 > URL: https://issues.apache.org/jira/browse/HBASE-6874 > Project: HBase > Issue Type: Sub-task > Reporter: Karthik Ranganathan > Assignee: Karthik Ranganathan > > I did some quick experiments by scanning data that should be completely in > memory and found that adding pre-fetching increases the throughput by about > 50% from 26MB/s to 39MB/s. > The idea is to perform the next in a background thread, and keep the result > ready. When the scanner's next comes in, return the pre-computed result and > issue another background read. -- This message is automatically generated by JIRA. If you think it was sent incorrectly, please contact your JIRA administrators For more information on JIRA, see: http://www.atlassian.com/software/jira