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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:
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:
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
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.
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.
Examples
Command: dsmc Incremental
Command: dsmc i b9\sys: b9\data: b9\bind:
Command: dsmc inc vol:system/*
Command: dsmc inc -incrbydate
Command: dsmc inc nds:
Command: dsmc inc b9\sys:
Command: dsmc inc nds:.o=ann.*