Accidentally sent the last message to the wrong list. I just checked in a rough file disk cache loosely based on JCS-58.
Aaron --- On Wed, 6/17/09, Tore Halset <hal...@pvv.ntnu.no> wrote: > From: Tore Halset <hal...@pvv.ntnu.no> > Subject: Re: Indexed Disk Cache safe copying of files > To: "JCS Users List" <jcs-users@jakarta.apache.org> > Date: Wednesday, June 17, 2009, 1:35 PM > Hello. > > I do this in my jcs cache. The items in the cache is 0-30MB > each. The total volume is ~20GB. Instead of the standard > indexed disc cache, I use a file based cache. The key is > converted to a filename and each item is stored as a > separate file. Several jvms can share the same cache and the > cache can be rsynced between nodes while running the > application. > > This setup might be slow for caches with lots of small > objects, but it works very well with my setup. > > The source code is attached to this issue: > https://issues.apache.org/jira/browse/JCS-58 > > To be able to hold as many objects as possible in ram > without getting OutOfMemoryException, I use this cache with > a soft reference cache. > https://issues.apache.org/jira/browse/JCS-54 > > Regards, > - Tore. > > On Jun 17, 2009, at 10:23, Silvano wrote: > > > Since we have a large cache that needs significant > time to be populated, we need to be able to copy the files > of the regions configured as Indexed Disk Cache between > different installations. > > We believe this can be done safely if we turn off the > jvm, but we would need to copy safely the files while the > jvm is running. However it seems that the key files are > written only when you turn off the jvm (at least the size > changes when we turn off the jvm, so we suspect that they > are not synchronized to disk in normal operations). > > > > We can make sure at application level that nobody > writes in the cache during the file copy process, but is > this sufficient? > > > > Can anybody recommend a solution to this issue? > > > > Best regards, > > Silvano. > > > > > --------------------------------------------------------------------- > > To unsubscribe, e-mail: jcs-users-unsubscr...@jakarta.apache.org > > For additional commands, e-mail: jcs-users-h...@jakarta.apache.org > > > > > > > --------------------------------------------------------------------- > To unsubscribe, e-mail: jcs-users-unsubscr...@jakarta.apache.org > For additional commands, e-mail: jcs-users-h...@jakarta.apache.org > > --------------------------------------------------------------------- To unsubscribe, e-mail: jcs-users-unsubscr...@jakarta.apache.org For additional commands, e-mail: jcs-users-h...@jakarta.apache.org
