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Tivoli Storage Manager for NetWare Backup-Archive Client Installation and User's Guide

Incremental

The incremental command backs up all new or changed files or directories in the default client domain or from NetWare volumes you specify, unless you exclude them from backup services. Tivoli Storage Manager also backs up file system trustee rights along with file data. It is not possible to restore only the trustee rights; they are restored as part of the file restore process.

You can incrementally back up an entire file space (domain) or just a single file. If you specify only the file space name, the entire directory tree is traversed. If you specify a directory, only that directory is backed up, unless you set the subdir option to yes. This is considered a partial incremental back up.

The following attributes in the management class assigned to the file or directory affect whether the data is actually backed up:

Frequency
The number of days that must elapse between successive backups for the file. Use this attribute during a full incremental backup.

Mode
Permits you to back up only files that changed since the last backup (modified). Also permits you to back up the files whether they changed or not (absolute).

Serialization
Permits or denies backup of files or directories according to the following values:

For more information on management classes, see Chapter 8, "Understanding Storage Management Policies".

Using the include option in an include-exclude list, you can assign the default management class to a file. You can also assign a specific management class to a file.

You can perform either a full incremental backup or an incremental by date backup. The default is a full incremental backup.

You can also use the selective command to perform a selective backup that backs up only the files, directories or empty directories that you specify. For more information, see Selective.

A full incremental backs up all files or directories that are new or have changed since the last incremental backup. During a full incremental backup, the client queries the server to determine the exact condition of your storage. Tivoli Storage Manager uses this information to:

Incremental-by-Date

An incremental-by-date backup backs up new and changed files with a modification date later than the date of the last incremental backup stored at the server, unless the files are excluded from backup by an exclude statement.

If an incremental-by-date is performed on only part of a file system, the date of the last full incremental is not updated, and the next incremental-by-date will back up these files again. Use the query filespace command to determine the date and time of the last incremental backup of the entire file system.

To perform an incremental-by-date backup, use the incrbydate option with the incremental command.

Unlike a full incremental, an incremental-by-date does not maintain current server storage of all your NetWare server files because:

For these reasons, if you have limited time during the week to perform backups, but extra time on the weekends, you can perform an incremental-by-date backup on weekdays and a full incremental backup on weekends to maintain current server storage of your NetWare server files.

If you are running NetWare Btrieve on your NetWare server (or any other server-based database), stop the database application before backing up the files associated with the database. Many database applications place locks on files that can prevent Tivoli Storage Manager from backing them up. Because Tivoli Storage Manager is a Storage Management Services (SMS) backup application, it supports database Target Service Agents (TSAs) as soon as they are available. This allows Tivoli Storage Manager to maintain database integrity without manual interaction.

If Tivoli Storage Manager refuses to back up a file, check to see if it is marked for execute only or it is opened and locked by another user.

If the incremental command is retried because of a communication failure or session loss, the transfer statistics will display the number of bytes Tivoli Storage Manager attempted to transfer during all command attempts. Therefore, the statistics for bytes transferred may not match the file statistics, such as those for file size.

For information about backing up server specific information, see Tivoli Storage Manager NetWare Backup and Recovery Guide.

Syntax

                              .-------------------.
                              V                   |
>>-Incremental--+----------+----+---------------+-+------------><
                '- options-'    +-filespec------+
                                '-filespacename-'
 
 

Parameters

options
You can use these command line options with the incremental command: dirsonly, filelist, filesonly, incrbydate, volinformation. For more information, see Chapter 10, "Using Options with Commands".

You can use these common options with the incremental command: changingretries, domain, , memoryefficientbackup, subdir, , tapeprompt. For information about these options, see Chapter 9, Using Processing Options.

filespec
Specifies the path and file name that you want to back up. Use wildcards to select a group of files, all the files in a directory, all objects in a directory branch, or all objects in a volume. You can also enter up to 20 file specifications in a command by separating the file specifications with a space. If you do not specify a file specification, the default domain or the domain specified as an option is backed up. See Maximum File Size for Operations for the maximum file size for back up processing.

If you specify a volume, all new and changed files are backed up. In addition, the last incremental date for the file space is updated on the server. If you specify a file or directory, the last incremental date is not updated. This means the file or directory might be backed up again if a later backup is performed using the incrbydate option.

If you specify a volume, specify the volume without a trailing slash.

filespacename
Specifies the file space name on the server that contains the files you want to back up.

Examples

Task
Run an incremental backup of the default client domain specified in your client options file (dsm.opt).

Command: dsmc Incremental

Task
Run a full incremental backup for the sys: volume, the data: volume on server b9.

Command: dsmc i b9\sys: b9\data: b9\bind:

Task
Run a partial incremental backup.

Command: dsmc inc vol:system/*

Task
Run a partial incremental backup by date using the incrbydate option.

Command: dsmc inc -incrbydate

Task
Incrementally back up the NDS.

Command: dsmc inc nds:

Task
Run an incremental backup remotely for the sys: volume on server b9.

Command: dsmc inc b9\sys:

Task
Run a partial incremental backup of the NDS.

Command: dsmc inc nds:.o=ann.*


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