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	<title>lizongbo at 618119.com &#187; Cluster</title>
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	<description>工作,生活,Android,前端,Linode,Ubuntu,nginx,java,apache,tomcat,Resin,mina,Hessian,XMPP,RPC</description>
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		<title>service集群的快速失败转移策略选择</title>
		<link>http://618119.com/archives/2008/12/28/109.html</link>
		<comments>http://618119.com/archives/2008/12/28/109.html#comments</comments>
		<pubDate>Sat, 27 Dec 2008 18:13:01 +0000</pubDate>
		<dc:creator>lizongbo</dc:creator>
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		<description><![CDATA[前提，Service是多个，数组方式存在，hashcode取模方式负载均衡， 当某个 service出现故障时的快速失败转移策略。 1.N+1模式， N个正常运行的service，1个备份service。 类似心跳检测，当某个service的方法无法调用时， 从数组中将其替换为备份是service，是n对1模式， 优点是替换简便，缺点是始终留一个冷备。 如果同时坏两个的时候不好处理。 还有切换之后待故障service恢复之后的切换回。 可以采取类似浮动ip模式以抢ip的方式来进行切换。 2.rehash N个正常运行的Service.无备份。 类似心跳检测，当某个service的方法无法调用时。 将按qq取模落在该service上的请求，重新hash， 将其分散到另外N-1个Service上。 如果再坏一个，就rehash到剩下的N-2个。 缺点是算法复杂，优点是无需冷备。不浪费资源 Tags: 集群]]></description>
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		<title>Openfire 3.5.0正式发布，Openfire Enterprise也将开源</title>
		<link>http://618119.com/archives/2008/04/08/79.html</link>
		<comments>http://618119.com/archives/2008/04/08/79.html#comments</comments>
		<pubDate>Tue, 08 Apr 2008 04:48:08 +0000</pubDate>
		<dc:creator>lizongbo</dc:creator>
				<category><![CDATA[Cluster]]></category>
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		<category><![CDATA[Spark]]></category>
		<category><![CDATA[XMPP]]></category>
		<category><![CDATA[未分类]]></category>
		<category><![CDATA[coherence]]></category>
		<category><![CDATA[OpenFire]]></category>
		<category><![CDATA[Oracle]]></category>
		<category><![CDATA[spark]]></category>
		<category><![CDATA[集群]]></category>

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		<description><![CDATA[Openfire 3.5.0正式发布，Openfire Enterprise也将开源 openfire 3.5 的 修订日志在： http://www.igniterealtime.org/builds/openfire/docs/latest/changelog.html 相关下载地址： http://www.igniterealtime.org/downloadServlet?filename=openfire/openfire_3_5_0.zip http://www.igniterealtime.org/downloadServlet?filename=openfire/openfire_src_3_5_0.zip Openfire Enterprise下载 http://www.igniterealtime.org/projects/openfire/plugins/enterprise.jar http://www.igniterealtime.org/projects/openfire/plugins/webchat.war 其它插件下载： http://www.igniterealtime.org/projects/openfire/plugins/asterisk-im.jar http://www.igniterealtime.org/projects/openfire/plugins/broadcast.jar http://www.igniterealtime.org/projects/openfire/plugins/contentFilter.jar http://www.igniterealtime.org/projects/openfire/plugins/emailListener.jar http://www.igniterealtime.org/projects/openfire/plugins/gateway.jar http://www.igniterealtime.org/projects/openfire/plugins/motd.jar http://www.igniterealtime.org/projects/openfire/plugins/presence.jar http://www.igniterealtime.org/projects/openfire/plugins/registration.jar http://www.igniterealtime.org/projects/openfire/plugins/search.jar http://www.igniterealtime.org/projects/openfire/plugins/sip.jar http://www.igniterealtime.org/projects/openfire/plugins/subscription.jar http://www.igniterealtime.org/projects/openfire/plugins/userImportExport.jar http://www.igniterealtime.org/projects/openfire/plugins/userservice.jar http://www.igniterealtime.org/projects/openfire/plugins/enterprise.jar Openfire Enterprise以前是作为商业插件提供的，现在也将变成开源。相关文章： http://www.igniterealtime.org/community/blogs/ignite/2008/04/07/openfire-is-lookin-hot http://www.igniterealtime.org/community/blogs/ignite/2008/04/07/openfire-enterprise-is-becoming-open-source http://www.igniterealtime.org/community/blogs/ignite/2008/04/07/turning-openfire-enterprise-into-an-open-source-product 目前在官方网站尚未看到 Openfire Enterprise的代码 http://svn.igniterealtime.org/svn/repos/ 由于Openfire Enterprise是使用了Oracle Coherence来实现集群功能， 而Oracle Coherence是被Oracle收购的Tangosol Coherence，是商业产品。因此Openfire Enterprise的集群功能不会开源。 关于Oracle Coherence，可以参看： http://www.oracle.com/technology/global/cn/products/coherence/index.html Tags: Cluster, coherence, OpenFire, Oracle, spark, [...]]]></description>
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