----- Original Message ----- From: Gerhard Froehlich <[EMAIL PROTECTED]> To: <[EMAIL PROTECTED]> Sent: Wednesday, December 12, 2001 2:13 PM Subject: RE: [VOTE] adding Jisp based Store persistence to the Scratchpad
> Vadim, > >From: Vadim Gritsenko [mailto:[EMAIL PROTECTED]] > > > > > >What would be the benefits of using B-Tree indexed file vs filesystem > >directory? > > - When you have many files in one directory that can be problematic > for maintainence. > - Some Caching system like Squid split that up into the different > subdirectories, others hold the data in one file. > - With this Implementation we would be able to turn -if wished- > the MRUMemoryStore (or something equal) off and use only the Filesystem > for Storing. Maybe for machines with limited memory,.... For this approach > you need some speedy access for the data on the FS. If you are going to persue this thought process, bear in mind that storing large numbers of files in a single directory has serious performance considerations, unless you are using a specialized file system - I'm thinking of ReiserFS (for Linux) which advertises exceptional performance both for large numbers of files, especially for files <4k in size. Also, my experience with disk-based caching is that it is inherently slower than memory-based, and so should only be used in situations where the data either needs to be guaranteed failsafe (QOS-type requirements), or where it is known in advance that the data will not be required for some time to come. In practice, I expect that it is cheaper and possibly more elegant to upgrade the physical memory, especially at current market prices. Appologies for stepping on toes, Adrian --------------------------------------------------------------------- To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, email: [EMAIL PROTECTED]
