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  • Softek AdvancedCopy Manager Operator's Guide

    for cluster environment

    MC/ServiceGuard

    10.2

    for HP-UX

  • Preface ++Purpose

    This manual explains the installation, customization, and operation of Softek AdvancedCopy Manager when it is used in a cluster system.

    ++Audience

    This manual is intended for system managers responsible for managing storage with Softek AdvancedCopy Manager in a cluster system.

    ++Organization

    This manual consists of the following six chapters:

    +Chapter 1 Overview

    This chapter provides an overview of cluster systems.

    +Chapter 2 Installation of Agent function of Softek AdvancedCopy Manager

    This chapter explains how to install Agent function of Softek AdvancedCopy Manager.

    +Chapter 3 Customization of Storage Server Transactions

    This chapter explains how to customize Storage server transactions.

    +Chapter 4 Starting and Stopping a Daemon

    This chapter explains how to start and stop a daemon.

    +Chapter 5 Operation

    This chapter explains the operation of Softek AdvancedCopy Manager when it is used in a cluster system.

    +Chapter 6 Deleting a Cluster Environment

    This chapter explains how to delete a cluster environment.

    ++Positioning of This Manual

    This manual is a separate volume provided to only users who use Softek AdvancedCopy Manager in a cluster system environment. Before reading this manual, first read the following Softek AdvancedCopy Manager manuals and to gain an overall understanding of Softek AdvancedCopy Manager:

    - Softek AdvancedCopy Manager Installation Guide

    This manual explains how to install Softek AdvancedCopy Manager.

    - Softek AdvancedCopy Manager Operator's Guide

    This manual explains the operation of Softek AdvancedCopy Manager.

    - Softek AdvancedCopy Manager Messages

    This manual explains the messages output by Softek AdvancedCopy Manager and the action that the operator should take in response to them.

    ++Conventions for Product Names

    - Microsoft(R) Windows NT(R) Server network operating system Version 4.0 and Microsoft(R) Windows NT(R) Workstation network operating system Version 4.0 are referred to as Windows NT.

    - The Microsoft(R) Windows(R) 95 operating system is referred to as Windows 95.

    - The Microsoft(R) Windows(R) 98 operating system is referred to as Windows 98.

    - Microsoft(R) Windows(R) 2000 Professional, Microsoft(R) Windows(R) 2000 Server, and Microsoft(R) Windows(R) 2000 Advanced Server are referred to as Windows 2000.

    - Microsoft(R) Windows(R) Millennium Edition is referred to as Windows ME.

    - Microsoft(R) Windows(R) XP Professional, and Microsoft(R) Windows(R) XP Home Edition are abbreviated as Windows XP.

    - Solaris (TM) Operating Environment is referred to as Solaris OE.

    - Softek AdvancedCopy Manager running on Solaris OE is referred to as the Solaris OE version of Softek AdvancedCopy Manager.

    i

  • ii

    - Softek AdvancedCopy Manager running on Windows is referred to as the Windows version of Softek AdvancedCopy Manager.

    - Softek AdvancedCopy Manager running on Linux is referred to as the Linux version of Softek AdvancedCopy Manager.

    - Manager function of Softek AdvancedCopy Manager is referred to as Manager function of AdvancedCopy Manager.

    - Agent function of Softek AdvancedCopy Manager is referred to as Agent function of AdvancedCopy Manager.

    ++Trademarks

    Windows, Windows NT, SQL Server, Internet Explorer, and Microsoft Cluster Server are the registered trademarks of Microsoft Corporation in the U.S.A. and other countries.

    Netscape logos and Netscape product and service names are the trademarks or registered trademarks of Netscape Communications Corporation in the U.S.A. and other countries.

    Sun, Sun Microsystems, the Sun Logo, Solaris and all Solaris based marks and logos are trademarks of Sun Microsystems, Inc. in the United States and other countries, and are used under license.

    UNIX is the registered trademark exclusively licensed by X/Open Company Limited in the U.S.A. and other countries.

    ORACLE is a registered trademark of Oracle Corporation.

    HP-UX is a registered trademark of Hewlett-Packard Company.

    Linux is a trademark or registered trademark of Mr. Linus Torvalds in the United States and other countries.

  • Chapter 1 Overview This chapter provides an overview of cluster systems.

    1.1 What Is a Cluster System? A cluster system uses two or more server machines as a single virtual server machine to provide high level of availability.

    In single-server machine operation, if the server machine or an application running on the server machine stops, the machine or the application must be restarted. During this time, operation stops.

    A cluster system, however, uses two or more server machines. If a failure occurs on one server machine or an application running on the server machine, the transaction can be resumed immediately by restarting the application on the other server machine. As a result, transaction down time is reduced. The switching a transaction from a server with a problem to another server that is operating normally is referred to as failover.

    In the cluster system, the server machines are collectively called a cluster, and each server machine in the cluster is called a node.

    For more information, refer to the cluster software manuals.

    1.2 Support Softek AdvancedCopy Manager runs on the following operating systems: · HP-UX 11.00, 11i Softek AdvancedCopy Manager cluster operation is supported by the following packages: · Softek AdvancedCopy Manager 10.2 Softek AdvancedCopy Manager supports only the following cluster systems: · Supported product

    MC/ServiceGuard A.11.13 · Supported type

    Failover · Volume manager

    LVM Softek AdvancedCopy Manager does not support the SYSTEM_MULTI_NODE.

    · In HP-UX, since Manager function of Softek AdvancedCopy Manager cannot be introduced, it cannot operate

    Storage management server transaction.

    1.3 Types of Operation This chapter explains the ways in which Softek AdvancedCopy Manager operates in a cluster system.

    1.3.1 Package and transaction With a MC/ServiceGuard cluster, the host system called node is packed into one group on a network. Application service is summarized in the group as a package. The composition unit of a cluster system is called package. Moreover, the composition unit of a package is called package resource. With a package resource, a disk, an IP address, application, etc. which can be used by the cluster system are mentioned. The following figure shows the concept of cluster and transactions in a cluster system.

    1

  • Cluster operation in Softek AdvancedCopy Manager means to make AdvancedCopy Manager functions available to transactions in a Package by incorporating them into the Package. In a Package, Softek AdvancedCopy Manager itself is also treated as a transaction. In particular, a transaction that is performed by a storage server is called a Storage server transaction.

    · In Softek AdvancedCopy Manager, some transactions operate on a physical node and are therefore not

    supported for cluster operation. Transactions of this type are called local Storage transactions.

    1.3.2 AdvancedCopy Manager server types and server transaction types In Softek AdvancedCopy Manager, a system in which Agent function of Softek AdvancedCopy Manager is installed is called a storage server. Server type refers to this classification. In Softek AdvancedCopy Manager cluster operation, a transaction performed by a storage server is called a Storage server transaction (see Chapter 1.3.1, "Package and transaction "). Server transaction type refers to this classification.

    In HP-UX, since Manager function of Softek AdvancedCopy Manager cannot be introduced, it cannot operate Storage management server transaction.

    A Storage server transaction can be incorporated into multiple packages in a cluster system. Consequently, storage server functions can be used in each package. Since whether a system is a cluster system or not makes no difference in a network, multiple storage servers appear to exist even though a cluster system is physically just a single system.

    1.3.3 Logical servers and node types When AdvancedCopy Manager transactions are performed in multiple package of a cluster system, an IP address can be set for each package. This type of IP address, called a logical IP address, makes the server corresponding to a

    2

  • AdvancedCopy Manager transaction appear to exist in the network. This type of server is called a logical server or logical node. The following figure shows an example of a storage server in a cluster system.

    A cluster system consists of two physical nodes. In a cluster system, the node on which a transaction operates is generally called the primary node and the standby node is called the secondary node. Node type refers to this classification. In a MC/ServiceGuard cluster system, on the other hand, the concept of the primary node/secondary node is different in each package because the nodes for active/standby can be selected in each package. In the above figure, for example, the primary node for transaction A and the secondary node for transaction B are physically the same.

    1.3.4 Transaction types of applications The transa