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# The persistent cache under Apache Cocoon

## Goal

This document explains how the persistent cache under Cocoon operates.

## Normal filesystem persistence:

When you configure this opportunity, then the Cocoon objects will be ordinarily serialized to a specified directory. This method is okay for a small number of objects and if your OS can handle long filenames. Some Windows OS have problems when the filenames are very long.

## Jisp based persistence:

The aim of the Jisp based persistence is to provide a more scalable persistence. The objects are stored in an indexed file, which uses a B-Tree alghorithm to store the objects. This is a more elegant and fast solution, especially when you need to handle many objects.

## Configuration:

     <persistent-store logger="core.store.persistent">
        <!-- Configuration goes here -->
     </persistent-store>

Please refer to `cocoon.xconf` file for further configuration explanation.

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