You are viewing a plain text version of this content. The canonical link for it is here.
Posted to dev@lucene.apache.org by "Varun Thacker (JIRA)" <ji...@apache.org> on 2011/05/29 20:25:47 UTC
[jira] [Updated] (LUCENE-2793) Directory createOutput and openInput
should take an IOContext
[ https://issues.apache.org/jira/browse/LUCENE-2793?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Varun Thacker updated LUCENE-2793:
----------------------------------
Attachment: LUCENE-2793.patch
I have made a class IOContext and added a IOContext object to the Directory createOutput and openInput method parameters.
If this is the right way to go ?
> Directory createOutput and openInput should take an IOContext
> -------------------------------------------------------------
>
> Key: LUCENE-2793
> URL: https://issues.apache.org/jira/browse/LUCENE-2793
> Project: Lucene - Java
> Issue Type: Improvement
> Components: core/store
> Reporter: Michael McCandless
> Assignee: Simon Willnauer
> Labels: gsoc2011, lucene-gsoc-11, mentor
> Attachments: LUCENE-2793.patch, LUCENE-2793.patch
>
>
> Today for merging we pass down a larger readBufferSize than for searching because we get better performance.
> I think we should generalize this to a class (IOContext), which would hold the buffer size, but then could hold other flags like DIRECT (bypass OS's buffer cache), SEQUENTIAL, etc.
> Then, we can make the DirectIOLinuxDirectory fully usable because we would only use DIRECT/SEQUENTIAL during merging.
> This will require fixing how IW pools readers, so that a reader opened for merging is not then used for searching, and vice/versa. Really, it's only all the open file handles that need to be different -- we could in theory share del docs, norms, etc, if that were somehow possible.
--
This message is automatically generated by JIRA.
For more information on JIRA, see: http://www.atlassian.com/software/jira
---------------------------------------------------------------------
To unsubscribe, e-mail: dev-unsubscribe@lucene.apache.org
For additional commands, e-mail: dev-help@lucene.apache.org