Uwe Schindler created LUCENE-4864:
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Summary: Add AsyncFSDirectory to work around Windows issues with
NIOFS (Lucene 5.0 only)
Key: LUCENE-4864
URL: https://issues.apache.org/jira/browse/LUCENE-4864
Project: Lucene - Core
Issue Type: Improvement
Components: core/store
Reporter: Uwe Schindler
On LUCENE-4848 a new directory implementation was proposed that uses
AsyncFileChannel to make a sync-less directory implementation (only needed for
IndexInput). The problem on Windows is that positional reads are impossible
without overlapping (async I/O), so FileChannel in the JDK has to syncronize
all reads, because they consist of an atomic seek and atomic read.
AsyncFSDirectoty would not have this issue, but has to take care of thread
management.
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