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Pavel Yaskevich commented on CASSANDRA-2731:
--------------------------------------------
Sorry, I misunderstand that. I previously read that Windows also has a
possibility to run async I/O but I still need to investigate that deeper,
anyway I was planing to check a platform using #ifdef's and act properly.
> Impelement in-house file caching.
> ---------------------------------
>
> Key: CASSANDRA-2731
> URL: https://issues.apache.org/jira/browse/CASSANDRA-2731
> Project: Cassandra
> Issue Type: New Feature
> Components: Core
> Affects Versions: 1.0
> Reporter: Pavel Yaskevich
> Assignee: Pavel Yaskevich
>
> Implement FileCache, CachedRandomAccessFile (to replace
> BufferedRandomAccessFile) and RadixTree (to play role of the backend cache
> storage) classes.
> FileCache class with be responsible for storing/retrieving data from Radix
> Tree and also flushing of the dirty pages to the disk, page management such
> as adding new pages, utilizing old/unused pages.
> CRAF Linux only features (via JNI):
> 1). O_DIRECT for both read/write operations.
> 2). AIO's lio_listio write operation batching.
> Provide possibility to migrate hot data directly from Memtable to CRAF cache
> to keep live-reads data always hot in memory. To minimise compaction effects
> CRAF should provide a way to by-pass a caching data if it does not already
> exists.
> Provide a way to make pointers in the cache which will be useful to minimize
> impact on performance when a single column is distributed among multiple
> SSTable files (except counter columns).
> Use jemalloc (http://www.canonware.com/jemalloc/) for cache memory management.
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