Minimum I/O to Volumes Associated with FILE Device Class

In Tivoli Storage Manager Version 5.3, the minimum I/O to a volume

associated with a FILE device class is 256 KB, regardless how much data is

being written to the volume. For example, if you are backing up one

500-byte object, it will take 256 KB of I/O to store it on the volume. In

terms of performance, the size of the I/O for a volume associated with a

FILE device class has the greatest impact when backing up or archiving a

large number of small objects (for example, small files or small directories).

To reduce the potential for performance degradation, you can increase the

size of aggregates created by the server. (An aggregate is an object that

contains multiple logical files that are backed up or archived from a client

in a single transaction.) To increase the size of aggregates, increase the

value of the TXNGROUPMAX option in the server options file

(dsmserv.opt) or increase the value of the TXNGROUPMAX parameter on

the REGISTER NODE or UPDATE NODE server commands. In addition to

increasing the TXNGROUPMAX value, you might also need to increase the

values for the following options:

v The client option TXNBYTELIMIT in the client options file (dsm.opt)

v The server options MOVEBATCHSIZE and MOVESIZETHRESH

For details about the server options and commands, refer to the

Administrator’s Reference. For details about the client option

TXNBYTELIMIT, refer to the Backup-Archive Clients Installation and User’s

Guide.

Note: For certain tasks (for example, using content-management products,

using the DIRMC client option to store directory information, or

migrating very small files using the hierarchical space management

(HSM) client), you can minimize wasted space on storage volumes

in a FILE-type storage pool by specifying the NONBLOCK data

format when defining the storage pool. In most situations, however,

the NATIVE format is preferred.

Changes for IBM Tivoli Storage Manager Version 5 Release 2—January 2004

The following changes have been made to the product for this edition:

General Updates

Updates based on the input of users have been made throughout the book. A new section for automating the storage agent startup has also been added. See “Automating the Storage Agent Startup” on page 43 for more information.

Changes for IBM Tivoli Storage Manager Version 5 Release 2—June 2003

The following changes have been made to the product for this edition:

LAN-free for z/OS

Tivoli Storage Manager now supports LAN-free data movement in storage area network (SAN) environments on the z/OS® and OS/390® operating systems. The z/OS or OS/390 server acts as the data manager for a client that uses a storage agent See Chapter 2, “Planning,” on page 5 for an

xivIBM Tivoli Storage Manager for SAN for AIX: Storage Agent User’s Guide

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IBM SC32-0129-00 manual Minimum I/O to Volumes Associated with File Device Class, LAN-free for z/OS
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SC32-0129-00 specifications

The IBM SC32-0129-00 is a sophisticated component that plays a vital role in the realm of enterprise computing. Primarily designed for IBM's mid-range systems, it is known for its robust performance and reliability, serving as a critical part of data processing and storage architectures.

One of the main features of the SC32-0129-00 is its advanced input/output capabilities. This component supports a variety of connectivity options, enabling seamless integration within existing IT infrastructures. Its compatibility with multiple IBM systems ensures that organizations can enhance their current setups without needing to overhaul their entire technology stack.

The SC32-0129-00 utilizes cutting-edge technology to optimize data flow and accessibility. With its high-throughput design, it allows for rapid data transfer, facilitating efficient processing and retrieval. This is especially crucial in environments where large amounts of data are generated and need to be analyzed in real-time.

In terms of characteristics, the SC32-0129-00 is built with durability in mind. Its construction adheres to stringent quality standards, which means it can withstand the demands of high-volume operations. This resilience makes it a favored choice among businesses looking to maintain uptime and minimize disruptions.

Additionally, the SC32-0129-00 is designed with scalability in mind. As organizations grow and their data needs expand, this component can easily adapt to accommodate increased workloads. This flexibility is essential for businesses that must evolve with changing market conditions and technological advancements.

Another noteworthy aspect of the SC32-0129-00 is its energy efficiency. In an era where sustainability is paramount, efficient power consumption helps organizations reduce their carbon footprint while lowering operational costs. This aligns with IBM's commitment to creating environmentally friendly solutions.

In summary, the IBM SC32-0129-00 is a critical asset for businesses seeking to enhance their data processing capabilities. With its robust input/output features, high throughput, durability, scalability, and energy efficiency, it is engineered to serve the complex demands of today’s digital landscape. Investing in this component could lead to significant improvements in productivity and performance, making it a valuable addition to any enterprise system.
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