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Posted to dev@lucy.apache.org by "Marvin Humphrey (JIRA)" <ji...@apache.org> on 2009/10/26 05:09:02 UTC
[jira] Created: (LUCY-61) RAMFile
RAMFile
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Key: LUCY-61
URL: https://issues.apache.org/jira/browse/LUCY-61
Project: Lucy
Issue Type: Sub-task
Reporter: Marvin Humphrey
Assignee: Marvin Humphrey
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[jira] Updated: (LUCY-61) RAMFile
Posted by "Marvin Humphrey (JIRA)" <ji...@apache.org>.
[ https://issues.apache.org/jira/browse/LUCY-61?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Marvin Humphrey updated LUCY-61:
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Attachment: RAMFile.c
RAMFile.bp
The Lucene implementation of RAMFile is backed by an array of buffers; in
contrast, this implementation uses a single buffer. This probably makes it
less efficient when writing large files, because reallocating a single buffer
as the file grows is less efficient than adding new, small buffers.
However, to simulate memory mapping of the entire file, we need to have a
single, unified buffer at read-time.
It is possible to improve on this implementation by adding a multi-buffer set
up for use during write-time, which then would be consolidated into a single
buffer some time between the finish of writing and the first read. For now,
though, the present, simple implementation will do.
> RAMFile
> -------
>
> Key: LUCY-61
> URL: https://issues.apache.org/jira/browse/LUCY-61
> Project: Lucy
> Issue Type: Sub-task
> Reporter: Marvin Humphrey
> Assignee: Marvin Humphrey
> Attachments: RAMFile.bp, RAMFile.c
>
>
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[jira] Resolved: (LUCY-61) RAMFile
Posted by "Marvin Humphrey (JIRA)" <ji...@apache.org>.
[ https://issues.apache.org/jira/browse/LUCY-61?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Marvin Humphrey resolved LUCY-61.
---------------------------------
Resolution: Fixed
Committed as r830062.
> RAMFile
> -------
>
> Key: LUCY-61
> URL: https://issues.apache.org/jira/browse/LUCY-61
> Project: Lucy
> Issue Type: Sub-task
> Reporter: Marvin Humphrey
> Assignee: Marvin Humphrey
> Attachments: RAMFile.bp, RAMFile.c
>
>
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