You are viewing a plain text version of this content. The canonical link for it is here.
Posted to commits@cassandra.apache.org by "Carlos Abad (JIRA)" <ji...@apache.org> on 2017/08/18 18:19:01 UTC
[jira] [Created] (CASSANDRA-13778) Enable Direct I/O for non-system
SStables operations
Carlos Abad created CASSANDRA-13778:
---------------------------------------
Summary: Enable Direct I/O for non-system SStables operations
Key: CASSANDRA-13778
URL: https://issues.apache.org/jira/browse/CASSANDRA-13778
Project: Cassandra
Issue Type: Improvement
Components: Local Write-Read Paths
Reporter: Carlos Abad
Fix For: 4.x
Following the line of other databases (like RocksDB) enable Cassandra to bypass the Linux Page Cache by using Direct I/O. By enabling this functionality in the 4 main data paths (read/write un/compressed) our internal testing at Intel shows that using Direct I/O increased performance (latency and throughput) considerably.
In this implementation not all disk accesses bypass the OS Page Cache, only the ones targeting a non-system SStable data files do. Disk access to SStables metadata files -index, crc, system tables, etc- still benefit from the OS Page Cache.
--
This message was sent by Atlassian JIRA
(v6.4.14#64029)
---------------------------------------------------------------------
To unsubscribe, e-mail: commits-unsubscribe@cassandra.apache.org
For additional commands, e-mail: commits-help@cassandra.apache.org