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From Aaron Smuts <asm...@yahoo.com>
Subject Re: disk caching persistence
Date Fri, 16 Mar 2007 00:24:01 GMT
I'm not sure what the question is exactly.  Can you
clarify?

Aaron


--- Thomas Vandahl <tv@apache.org> wrote:

> Eric Wolf wrote:
> > I wanted to know how to "the disk cache can be
> configured to read or delete
> > the index file".  I wanted to set it to read to
> use caching as a way to
> > have my application functional while off-line of
> the databases.  I could not 
> > find how to do this anywhere in the documentation.
>  The "DiskUsagePattern"
> > seems to hint about it if you set it to UPDATE,
> but that only forces things
> > to disk.  It doesn't mention configuring the disk
> cache to read the index
> > file at start up.  Does someone know how to do
> this?
> 
> The code of the IndexedDiskCache suggests that the
> index file is being
> read if it exists and is not corrupted. I can see no
> configuration
> setting for this.
> 
> > Secondary question: How do you make sure of
> shutting down the disk cache
> > properly?
> 
> The IndexedDiskCache registers a Shutdown Hook with
> the runtime. So the
> dispose() method should be run at JVM exit the
> latest. In every other
> case if all managers associated with this cache call
> release(), the
> cache is disposed. During dispose() data files are
> (optionally)
> optimized and the key file is written.
> 
> Bye, Thomas.
> 
>
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