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Ice 是 Internet Communications Engine 的简称,出自ZeroC名门之下。
Ice 是一种面向对象的中间件平台。从根本上说,这意味着Ice 为构建面向对象的客户-服务器应用提供了工具、API 和库支持。Ice 应用适合于异构平台环境中使用:客户和服务器可以采用不同的编程语言,可以运行在不同的操作系统和机器架构上,并且可以使用多种网络技术进行通信。无论部署环境如何,这些应用的源码都是可移植的。

其采用C/S 模式结构,支持同步调用方式和异步调用方式,异步派发调用方式。支持跨语言的对象调用。多种语言之间采用共同的Slice(Specification Language for Ice)进行沟通。支持ice到C,JAVA,C#,VB,Python,Ruby,PHP等多种语言的映射。

Ice源代码发布包包含一系列的第三方产品:
• Berkeley DB, developed by Oracle (http://www.oracle.com)

• bzip2/libbzip2, developed by Julian R. Seward (http://sources.redhat.com/bzip2)

• The OpenSSL Toolkit, developed by the OpenSSL Project (http://www.openssl.org)

• SSLeay, developed by Eric Young (mailto:eay@cryptsoft.com)

• Expat, developed by James Clark (http://www.libexpat.org)

• STLport, developed by the STLport Standard Library Project (http://www.stlport.org)

• mcpp, developed by Kiyoshi Matsui (http://mcpp.sourceforge.net)
See the Ice source distribution for the license agreements for each of these products.

if cron of drupal can not re-run

in the log :Attempting to re-run cron while it is already running.

what to do?

1) connect to your database
2) execute: delete from variable where name=’cron_semaphore’ or name=’cron_last’;
3) execute: delete from cache;