[ http://issues.apache.org/jira/browse/LUCENE-753?page=comments#action_12460289 ] Yonik Seeley commented on LUCENE-753: -------------------------------------
> The Javadoc says that transferTo can be more efficient because the OS can > transfer bytes > directly from the filesystem cache to the target channel without actually > copying them. Unfortunately, only for DirectByteBuffers and other FileChannels, not for HeapByteBuffers. Sounds like we just need to do some benchmarking, but I have a bad feeling that all the checking overhead Sun added to NIO will cause it to be slower in the single threaded case. > Use NIO positional read to avoid synchronization in FSIndexInput > ---------------------------------------------------------------- > > Key: LUCENE-753 > URL: http://issues.apache.org/jira/browse/LUCENE-753 > Project: Lucene - Java > Issue Type: New Feature > Components: Store > Reporter: Yonik Seeley > Attachments: FSIndexInput.patch, FSIndexInput.patch > > > As suggested by Doug, we could use NIO pread to avoid synchronization on the > underlying file. > This could mitigate any MT performance drop caused by reducing the number of > files in the index format. -- This message is automatically generated by JIRA. - If you think it was sent incorrectly contact one of the administrators: http://issues.apache.org/jira/secure/Administrators.jspa - For more information on JIRA, see: http://www.atlassian.com/software/jira --------------------------------------------------------------------- To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
