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From bugzi...@apache.org
Subject DO NOT REPLY [Bug 39380] - mod_disk_cache eats memory, has no LFS support, etc
Date Wed, 17 Jan 2007 09:56:35 GMT
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http://issues.apache.org/bugzilla/show_bug.cgi?id=39380


nikke@acc.umu.se changed:

           What    |Removed                     |Added
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  Attachment #18860|0                           |1
        is obsolete|                            |




------- Additional Comments From nikke@acc.umu.se  2007-01-17 01:56 -------
Created an attachment (id=19418)
 --> (http://issues.apache.org/bugzilla/attachment.cgi?id=19418&action=view)
httpd 2.2.4 - mod_disk_cache jumbo patch - lfs/diskformat/read-while-caching
etc.

This is an update of the mod_disk_cache jumbo patch.

It's been running for a couple of months on ftp.acc.umu.se now, so it's fairly
stable.

Highlights from previous patch:
* Reverted to separate files for header and data, there were too many corner
cases and having the data file separate allows us to reuse the cached data for
other purposes (for example rsync).
* Fixed on disk headers to be stored in easily machine parseable format which
allows for error checking instead human readable form that doesn't.
* Attaching the background thread to the connection instead of request pool
allows for restarts to work, the thing doesn't crash when you do apachectl
graceful anymore :)
* Lots of error handling fixes and corner cases, we triggered most of them when
our backend went bezerk-go-slow-mode.
* Deletes cached files when cache decides that the object is stale for real,
previously it only NULL:ed the data structure in memory causing other requests
oto read headers etc.

Known issues:
* htcacheclean builds but is broken.

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