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NEC Storage Manager
Data Replication User’s Manual
(Function Guide)
IS015-9E
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© NEC Corporation 2001-2004 No part of the contents of this book may be reproduced or transmitted in any form without permission of NEC Corporation. The contents of this book may be modified without notice in the future.
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Preface This manual describes how to use the data replication function provided by NEC Storage DynamicDataReplication Ver2, NEC Storage RemoteDataReplication Ver2, and NEC Storage ReplicationControl. The data replication function consists of the replication volume creation function provided in a disk array and software to manage and operate it. It utilizes replication volume to make business operation more effective. Refer to the “NEC Storage Manager Manual Guide” (IS901) for the ove
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Description Corresponding Product Data Replication User’s Manual (Disaster NEC Storage Manager Data Replication User’s Manual Recovery System Installation and (Disaster Recovery System Installation and Operation Operation Guide) Guide) (IS027) Snapshot User’s Manual (Function NEC Storage Manager Snapshot User’s Manual (Function Guide) Guide) (IS030) 6. Trademarks and registered trademarks • Microsoft® and Windows® are trademarks or registered trademarks of Microsoft Corporation in the
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Contents Chapter 1 Data Replication Overview...............................................................................................................................1 1.1 Data Replication..........................................................................................................................................................1 1.2 Examples of Applying Data Replication..........................................................................................................
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3.3.1 Pair Setting/Unpair ............................................................................................................................................43 3.3.2 Replicate ............................................................................................................................................................50 3.3.3 Separate ...........................................................................................................................................
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4.7.1 Logical Disk Information Display Command .................................................................................................172 4.7.2 Pair/Unpair Command.....................................................................................................................................175 4.8 Disk Array Operations.............................................................................................................................................178 4.8.1 Command for
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Chapter 1 Data Replication Overview Chapter 1 Data Replication Overview To manage an enormous amount of information accumulated in business in a unified way and promote effective and efficient utilization of the information, a high-throughput, large-capacity, and high-reliability storage system is required. Data Replication provides functions to build and manage such a storage system. This chapter describes overview of Data Replication, hardware configuration, and software configuration.
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Chapter 1 Data Replication Overview 1.2 Examples of Applying Data 1.2 Examples of Applying Data 1.2 Examples of Applying Data Replication Replication Replication When you introduce Data Replication and use replication volumes which can be separated, you can get the following benefits. • The system down time during data backup is largely reduced. Lowered access performance to the business database during data backup in system operation can be prevented. • A test environment using t
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Chapter 1 Data Replication Overview The procedure for backup from a replication volume is described below. (1) During operation, the master volume (MV) and replication volume (RV) are connected. (2) Suspend the production task and separate the replication volume (RV). Resume the task after separation is complete. (3) Use the separated replication volume (RV) to perform backup and the task in parallel. After backup is complete, reconnect the replication volume (RV) (Reconnection takes on
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Chapter 1 Data Replication Overview 1.2.2 Test Environment Setting 1.2.2 Test Environment Setting 1.2.2 Test Environment Setting You can set the same environment as the production task environment easily by creating replication volumes using the Data Replication function. You can evaluate an application program by using data used in the production task, which makes evaluation of application programs more efficient. Furthermore, in building an evaluation environment, operations are suspe
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Chapter 1 Data Replication Overview 1.2.3 Parallel Processing of Search 1.2.3 Parallel Processing of Search 1.2.3 Parallel Processing of Search Operation Operation Operation By creating replication volumes of the master database, you can separate the database and carry out update tasks and search tasks using different volumes. This allows you to carry out database update tasks without affecting database search tasks. Daytime Nighttime Search Task Update Task
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Chapter 1 Data Replication Overview 1.3 System Configuration 1.3 System Configuration 1.3 System Configuration Business Server Backup Server Backup Software ReplicationControl Tape Drive ReplicationControl Management Server DB Replication • AccessControl LAN • DynamicDataReplication Storage Manager • RemoteDataReplication Disk Array Figure 1-6 System Configuration To install and use the Data Replication function, the following hardware devices are required. • D
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Chapter 1 Data Replication Overview • Storage Manager Provides the disk array configuration and state display functions. Installing DynamicDataReplication and/or RemoteDataReplication allows the replication management function (hereinafter, referred to as the Replication Management) incorporated in iSM. The Replication Management provides setting and operating functions such as state display, pair setting, and replication operation for DynamicDataReplication or RemoteDataReplication.
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Chapter 2 Data Replication Chapter 2 Data Replication This chapter describes the types and state transitions of volumes that are necessary to perform operation using the Data Replication function. 2.1 Volume Classification 2.1 Volume Classification 2.1 Volume Classification To create replication volumes using the Data Replication function, you must set the relation between the original volume and the target volume (replication volume) first. In replication control, the original vo
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Chapter 2 Data Replication Disk Array A Disk Array B FC A2 A1 B1 IV IV IV A3 A4 B2 MV RV RV/MV (PV) (rRV) (dRV) Pair Setting Volume A1/A2/B1 : IV Volume A3 : MV (PV) of the pair A3/A4 Volume A4 : RV (dRV) of the pair A3/A4, and MV of the pair A4/B2 Volume B2 : RV (rRV) of the pair A4/B2 Figure 2-1 Example of Volume Classification 9
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Chapter 2 Data Replication 2.2 Replication Operations 2.2 Replication Operations 2.2 Replication Operations The replication operations include Replicate that replicates data from MV to RV, Separate that separates between MV and RV, and Restore that replicates data from RV to MV. 2.2.1 Replicate 2.2.1 Replicate 2.2.1 Replicate This operation copies data from MV to RV. It is performed to replicate the latest data to the replication volume used in a test environment or search tasks
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Chapter 2 Data Replication 2.2.3 Restore 2.2.3 Restore 2.2.3 Restore This operation copies data from RV to MV. It is performed to restore data from the backup volume (RV) when a failure occurs in MV. When Restore is executed, the RV contents at the point of starting Restore are reflected copied into the MV. At this time, you can determine whether to reflect the updated data of the MV into the RV by choosing either of the following: • Restore with RV being updated: Restore(update)
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Chapter 2 Data Replication 2.3 Replication Operations and State 2.3 Replication Operations and State 2.3 Replication Operations and State Transitions Transitions Transitions This section describes the replication operations and state transitions. The pair setting is specified Difference between MV and The pair setting is specified but MV and RV are separated. RV is being reflected. and synchronization has been established. separated sync MV RV Replicate • RV cannot be updated. • U
