IBM eServer zSeries 890：技术特性与优势解析

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"IBM eServer zSeries 890问题解答手册" IBM eServer zSeries 890（简称z890）是一款基于IBM z/Architecture技术的服务器，它在2004年4月发布，旨在为用户提供类似于更高级别的System z服务器的功能，但以更低的入门级容量。这款服务器设计时考虑了灵活性和扩展性，通过提供新的粒度增长选项，使得企业可以根据需求逐步升级硬件资源。 z890的一个显著特点是引入了System z Application Assist Processor (zAAP)，这是一种专为Java应用程序优化的执行环境，目的是提高性能并降低成本。zAAP允许企业更经济高效地运行Java工作负载，从而提升整体性价比。该服务器还支持专业引擎来灵活部署Linux工作负载，同时内置Parallel Sysplex耦合设施，以增强系统间的协同工作能力。Parallel Sysplex技术允许多台IBM大型机通过高速通信链接形成一个逻辑上的单一系统，提高了处理能力和可用性。在安全方面，z890对加密密钥进行了增强，确保数据在传输和存储过程中的安全性。此外，服务器还支持多种操作系统，包括z/OS、z/VSE和z/VM V5，显示了其强大的虚拟化能力。z/OS是IBM的旗舰操作系统，提供高级服务和管理功能，而z/VSE和z/VM则为不同规模的企业提供了不同的操作环境选择。 IBM z890在硬件和软件定价方面都有明确的策略，包括针对不同工作负载的定制解决方案。硬件升级和网络I/O的改进也体现了IBM对提高系统性能和连接性的关注。例如，光纤布线的优化提升了zSeries系统的数据传输速度。对于想要利用IBM z890的客户，IBM Global Financing (IGF) 提供了财务解决方案，帮助企业轻松获取和管理这些高端服务器。此外，文档中还提到了WebSphere Application Server的相关信息，表明z890可以支持企业级应用的部署和管理。 IBM eServer zSeries 890是一款集可靠、可用、可扩展、集群化、虚拟化和优质服务于一体的服务器，通过其创新的技术如zAAP、Parallel Sysplex和Linux支持，为企业提供了强大且灵活的IT基础设施选择。

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Networking and I/O Enhancements

Tell me more about FICON Express performance improvement.

Question

What do I need to do to realize performance improvements on FICON Express?

Answer

On the z890, the new channel code for is part of the System level driver, which is 'Driver-55'.

Question

What environments can realize the FICON Express performance improvements?

Answer

This improvement apply to environments doing large numbers of small block (such as 4K)

FICON Express I/O operations. This might apply, for example, for database accesses in an

Online Transaction Processing environment. Little improvement is expected for environments

with predominantly large block I/O operations, such as might be found during off-shift batch and

backup work.

Question

Are the FICON Express performance improvements available on any zSeries server other than

the z890?

Answer

The improvements apply specifically to z890 and z990 servers only.

Question

Do I need to be at a specific level of z/OS or other operating system level to realize the FICON

Express performance improvement?

Answer

The improvements are for FICON Express channels running in (native) FICON mode, and will

apply when used with any operating system which runs on z890 and supports FICON Express,

and are thus independent of Operating System.

Tell me more about the channels that can be spanned.

Question

What does channel spanning mean to me, a client?

Answer

These channels can be shared between LPARs in different LCSSs. Prior to this they could only

be shared within a single LCSS.

Take the example of FICON channels. Whereas we had up to 15 LPARs previously using MIF

which allowed us to share channels between each LPAR, now with the z890 (and z990), we take

this concept to a new level. With the invention of Logical Channel SubSystems (LCSSs) and

spanning, we have the capability of defining up to 15 LPAR images per added LCSS. Spanning

of FICON channels allows up to two (2) LCSSs (four on the z990) to communicate through one

FICON Channel.

Question

Can channel spanning help me to simplify and reduce my zSeries infrastructure?

Answer

It can, if the load placed on the shared FICON can meet your performance requirements.

Channel spanning brings a higher level of FICON sharing to z890, allowing multiple LPARs

associated with different LCSS to attach to and share a common FICON Express port. This can

reduce the number of additional FICON channels that might be required to attach multiple

LPARs without the spanning capability.

Question

Can you give me an example of reducing my zSeries infrastructure with channel spanning?

Answer

If you configure your z890/z990 for multiple LCSSs, and you have a requirement to share

resources (I/O devices, networks, CFs) between LPARs in those LCSSs, you can now share the

channels between those LCSSs. This can help reduce the total number of needed physical

channels, switch ports, etc.

Or, consider the example of two different z900 servers with maximum partitions in each. In the

past, each z900 server would have its own set of FICON channels. These channels now can

possibly be consolidated, depending upon performance constraints.

Prior to spanning, we had to maintain an infrastructure for both sets of channels. Now, assuming

performance and bandwidth considerations are accounted for, we can consolidate by placing

each z900 server I/O into its own LCSS, within the same z890/z990 server.

Question

What channels can not be spanned?

Answer

ESCON, FICON Bridge (CHPID type FCV), and ISC-3 receiver (CHPID type CFR).

Question

Can you give me an example how spanning OSA-Express adapters can help my environment?

Answer

Channel spanning brings a higher level of OSA-Express MIF sharing to z890, allowing multiple

LPARs associated with different LCSS to attach to and share a common OSA-Express port. Each

port can be separately configured to provide either QDIO, non-QDIO or new OSC (OSA-ICC)

support. This can help reduce the number of separate or additional OSA-Express channels that

might be required for connecting to multiple LPARs without the spanning capability.

Question

Can you give me an example how OSA-Express Integrated Console Controller (OSA-ICC) can

help my current environment?

Answer

Each port of the OSA-Express 1000BASE-T Ethernet feature configured for OSA-ICC is

designed to support up to one hundred and twenty (120) IPL and operating systems console

sessions in z/OS, z/OS.e, z/VM, VSE/ESA and TPF environments. This console session

attachment capacity is a significant increase over prior IBM 2074 (Model 3 attachment

maximum of 96) and 3174 (one console per LPAR per controller) capabilities and is designed to

provide the capacity spanning both medium and large enterprise requirements.

Using the OSA-Express as the base feature means the OSA-ICC function enjoys many of the

same benefits as the OSA-Express itself such as spanned channel support, up to gigabit ethernet

speed, and hot plug replacement of existing feature (sessions will be lost). Since OSA-ICC is

enabled by using the new CHPID type definition of OSC, a specific OSA-Express 1000BASE-T

port can also be reconfigured to support either QDIO, non-QDIO and now OSC, thereby

providing configuration flexibility for the pool of OSA-Express features. The same

OSA-Express 1000BASE-T Ethernet can simultaneously be used for 10/100/1000 mega bits per

second ethernet connection for TCP/IP traffic on one port and support up to 120 console session

connections on the second port, eliminating the need for a dedicated external console controller.

The total cost of ownership for the OSA-ICC would include the cost of one port of the

OSA-Express 1000BASE-T Ethernet feature and the integrated zSeries Licensed Internal Code;

whereas the comparable cost for using an external controller such as the IBM 2074 would

include the 2074 and its integrated software, the optional ESCON adapter(s), the

keyboard/display, and the zSeries ESCON ports.

Question

Can the OSA-ICC connect to multiple separate z890 servers?

Answer

No. Since the OSA-ICC is a function operating on a port of the OSA-Express 1000BASE-T

Ethernet feature which is installed into the frame of a single z890, a single OSA-ICC port can

only support the mainframe to which it is attached. This means you would need a separate

OSA-ICC port on each individual z890 machine. This differs from the IBM 2074 Console

Support Controller which can support up to two external ESCON channel connections and is

external to any particular mainframe, and thus could be connected via an ESCON director to

multiple zSeries machines or to two specific zSeries via the two 2074 ESCON attachments.

Question

What desktop or laptop 3270 emulator does the OSA-ICC support?

Answer

IBM has tested the eNetwork Personal Communications V5.6 emulator running under Microsoft

Windows XP for compatibility, however there is no reason to believe that other RFC 2355

compatible emulators will not work. Please contact the emulator product vendor directly for

terms, conditions, prices and other product details related to such vendor's emulator. Errors in

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