Liyin Tang created HBASE-9102:
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Summary: HFile block pre-loading for large sequential scan
Key: HBASE-9102
URL: https://issues.apache.org/jira/browse/HBASE-9102
Project: HBase
Issue Type: Improvement
Affects Versions: 0.89-fb
Reporter: Liyin Tang
Assignee: Liyin Tang
The current HBase scan model cannot take full advantage of the aggrediate disk
throughput, especially for the large sequential scan cases. And for the large
sequential scan, it is easy to predict what the next block to read in advance
so that it can pre-load and decompress/decoded these data blocks from HDFS into
block cache right before the current read point.
Therefore, this jira is to optimized the large sequential scan performance by
pre-loading the HFile blocks into the block cache in a stream fashion so that
the scan query can read from the cache directly.
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