[CASSANDRA-8897] Remove FileCacheService, instead pooling the buffers

• Type: Improvement
• Status: Resolved
• Priority: Normal
• Resolution: Fixed
• Fix Version/s: 3.0 alpha 1
• Component/s: Legacy/Local Write-Read Paths
• Assignee: Stefania Alborghetti
• Reporter: Benedict Elliott Smith

Authors

Stefania Alborghetti

Reviewers

Benedict Elliott Smith

• Created: 03/Mar/15 17:01
• Updated: 16/Apr/19 09:31
• Resolved: 09/Jun/15 09:58

Description

After CASSANDRA-8893, a RAR will be a very lightweight object and will not need caching, so we can eliminate this cache entirely. Instead we should have a pool of buffers that are page-aligned.

Issue Links

• depends upon: CASSANDRA-8893 RandomAccessReader should share its FileChannel with all instances (via SegmentedFile)
• is related to: CASSANDRA-8894 Our default buffer size for (uncompressed) buffered reads should be smaller, and based on the expected record size
• relates to: CASSANDRA-8449 Allow zero-copy reads again
• relates to: CASSANDRA-9468 Improvements to BufferPool
• links to: 3.0 patch