[HBASE-4422] Move block cache parameters and references into single CacheConf class

• Type: Improvement
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 0.92.0
• Component/s: io
• Hadoop Flags: Reviewed
• Release Note: Relocates all cache configuration options and constants into a new CacheConfig class. Modifies lots of constructors from Store/StoreFile down to HFile.
• Assignee: Jonathan Gray
• Reporter: Jonathan Gray
• Created: 16/Sep/11 20:31
• Updated: 20/Nov/15 11:54
• Resolved: 12/Oct/11 04:18

Description

From StoreFile down to HFile, we currently use a boolean argument for each of the various block cache configuration parameters that exist. The number of parameters is going to continue to increase as we look at compressed cache, delta encoding, and more specific L1/L2 configuration. Every new config currently requires changing many constructors because it introduces a new boolean.

We should move everything into a single class so that modifications are much less disruptive.

Issue Links

• relates to: HBASE-4496 HFile V2 does not honor setCacheBlocks when scanning.