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Chapter 3 Database System Configuration
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When designing a system by using NEC Storage ReplicationControl SQL Option, it is necessary to
design Microsoft SQL Server 2000's database as well as NEC Storage's data replication relations.
For information on designing the data replication system, refer to the "NEC Storage Manager Data
Replication User's Manual (Installation and Operation Guide for Windows)".
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The concept of using the snapshot backup created by NEC Storage ReplicationControl SQL Option as a
backup to the master operations is described below along with the restoration model for Microsoft SQL
Server 2000 Books Online.
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(1) Snapshot backup
Refers to the type of backup used on the NEC Storage ReplicationControl SQL Option.
Functionally the same as the conventional database's complete backup and file backup, etc., this
type is capable of roll forwarding by using the transaction log backup. In the same manner as
other backups, the snapshot backup and recovery are traced with MSDB.
(2) Database backup
Since the snapshot backup is used, a complete backup of the database is not made.
(3) Database differential backup
Since the snapshot backup is used, a differential backup of the database is basically not made.
(4) Transaction log backup
The database can be restored to the state before the error occurred by combining the transaction
log backup with the snapshot backup.
In order to apply the transaction log after snapshot restoration, specify "norecovery" with the
"-remod" option.
Perform the system database backup or restoration by using the normal backup method or
with NEC Storage ReplicationControl by suspending the business operations of Microsoft SQL Server
2000.
For information on the timing of performing the system database backup, refer to the Microsoft SQL
Server 2000 Books Online.
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