blob: 957cc425b23ccf61d96877be070d15af244eca8a [file] [log] [blame]
<?xml version="1.0"?>
Licensed to the Apache Software Foundation (ASF) under one
or more contributor license agreements. See the NOTICE file
distributed with this work for additional information
regarding copyright ownership. The ASF licenses this file
to you under the Apache License, Version 2.0 (the
"License"); you may not use this file except in compliance
with the License. You may obtain a copy of the License at
Unless required by applicable law or agreed to in writing,
software distributed under the License is distributed on an
KIND, either express or implied. See the License for the
specific language governing permissions and limitations
under the License.
<title>Java Caching System</title>
<author email="">Pete Kazmier</author>
<author email="">Aaron Smuts</author>
<section name="Java Caching System">
JCS is a distributed caching system written in java. It is intended to speed up
applications by providing a means to manage cached
data of various dynamic natures. Like any caching system, the
JCS is most useful for high read, low put applications. Dynamic
content and reporting systems can benefit most. However, any
site that repeatedly constructs pages, dropdowns, or common
search results from a database that is updated at intervals
(rather than across categories continuously) can improve
performance and scalability by implementing caching. Latency
times drop sharply and bottlenecks move away from the database
in an effectively cached system.
The JCS goes beyond simply caching objects in memory. It
provides several important features, necessary for any
Enterprise level caching system:
<li>Memory management</li>
<li>Disk overflow (and defragmentation)</li>
<li>Thread pool controls</li>
<li>Element grouping</li>
<li>Quick nested categorical removal</li>
<li>Data expiration (idle time and max life)</li>
<li>Extensible framework</li>
<li>Fully configurable runtime parameters</li>
<li>Region data separation and configuration</li>
<li>Fine grained element configuration options</li>
<li>Remote synchronization</li>
<li>Remote store recovery</li>
<li>Non-blocking "zombie" (balking facade) pattern</li>
<li>Lateral distribution of elements via HTTP, TCP, or
<li>UDP Discovery of other caches</li>
<li>Element event handling</li>
<li>Remote server chaining (or clustering) and failover</li>