Domino Server类型

   安装Domino的时候，有一步是让你选择要安装的Server类型，有Domino Utility Server，DominoMessaging Server和Domino Enterprise Server三个类型。从描述上看，Domino UtilityServer只提供Application services，不提供Messaging Services；Domino MessagingServer只提供Messaging Service，不提供Application Service和Cluster；DominoEnterprise Server则既提高Application Service也提供MessagingSerivce。这个说法很笼统，Application Services和MessagingServices又具体指什么呢？很有有人能说清楚。今天看到一个台湾的哥们写的关于Domino的书，说Domino UtilityServer不包含Cluster。这种说法其实是错误的。
    以Domino 8.0.1为例，Domino Utility Server提供了一下功能（来源于IBM网站的Domino产品介绍）：

• Access to non-mail collaborative applications (Use of individual mail files is not allowed by the license.)
• Lotus Domino partitioning - the capability to run more than oneinstance of Lotus Domino on the same machine using one copy of theLotus Domino code
• Lotus Domino clustering for high availability (failover and load balancing)
• Limited use entitlement to IBM WebSphere® Application Server software
• Entitlement to IBM Lotus Domino Document Manager and IBM Lotus Workflow™ software
• Integrated administration and systems management tools
• Database compression which significantly reduces the storage size of Domino databases
• Lotus Domino 64 bit native support option for Microsoft Windows2003 and IBM AIX® platforms. 64 bit support enables Lotus Domino toaddress more memory on the server than prior releases of Lotus Domino

   所以，Domino Utility Server不仅包含Cluster支持，还包含了使用Domino Document Manager和Workflow的权利，功能还是非常的强大吆（加入你不打算使用Mail和Calender的功能）。
 
    那么，Messaging Server又包含什么功能呢。还是以Domino 8.0.1为例，

• E-mail, calendar and scheduling.
• Personal information management (PIM) functions, including personal directory and personal journal.
• Discussion databases.
• Reference databases with basic workflow for document review.
• Blog template for access by Lotus Notes and Web browser users.
• RSS feed generation template.
• Lotus Domino partitioning (the capability to run more than one instanceof Lotus Domino on the same machine using one copy of the Lotus Dominocode).
• Integrated administration and systems management tools.
• Database compression which significantly reduces the storage size of Domino databases.
• LotusDomino 64 bit native support option for Microsoft Windows 2003 and IBMAIX® platforms. 64 bit support enables Lotus Domino to address morememory on the server than prior releases of Lotus Domino.
• Support for Federal Information Processing Standards (FIPS) 140-2 standards encryption for Lotus Notes email.

    我们可以看到MessagingServer不包含Cluster功能。而Cluster对于大的企业用户又是一个很重要的功能，因为负载均衡和备份对于是非常关键的。所以大客户只能买Domino Enterprise Server了，它提供了Utility Server和Messaging Server的所有功能。