The ca_backup -diskstage command contains miscellaneous options that are used to define basic policies and parameters for Arcserve Backup to use during a disk staging backup job.
The ca_backup -diskstage command includes the following miscellaneous options:
ca_backup -diskstage <groupname>
[-maxstreams <Max # Streams(1-32)>] [-chunksize <size in MB(1-16)>] [-purgefailedsessions] [-purgecancelledsessions] [-makeupjobtotape] [-createDMJMakeupJobOnHold] [-leaveCatalogsOnDisk] [-consolidate
[-consolidate_mediaprefix <media prefix>] [-consolidate_mediapoolprefix <mediapool prefix>] [-consolidate_copymethod <append|overwrite>]]
Specifies that the backup job will use staging functionality and the name of the disk staging device group.
Specifies how many streams Arcserve Backup will use as it runs the backup job to the staging device.
The default number of streams is 4 and the supported range is between 1 and 32.
During a staging backup, directs Arcserve Backup to divide the data into smaller chunks (or sub jobs) to be written to the disk. You must specify the maximum size or amount of data (in MB) contained in each chunk.
The default chunk size is 1MB and the supported range is between 1 and 16MB.
If a session fails during the backup to disk (staging) process, directs Arcserve Backup to mark this session for deletion (purged from disk) immediately. This helps to reclaim disk space as soon as possible.
If a session is cancelled during the backup to disk (staging) process, directs Arcserve Backup to mark this session for deletion (purged from disk) immediately. This helps to reclaim disk space as soon as possible.
During the backup to disk (staging) process, if an error occurs because the disk is full, directs a makeup job to be created, which when run will directly back up to the final destination media (tape). This increases the chances of a successful backup even though the disk is full.
During a data migration job (DMJ), if a media or a tape drive error occurs, a makeup job would automatically be created on Hold. As a result, you do not have to create a tapecopy job. After fixing the drive or media error, you would then just need to change the status of the makeup job from Hold to Ready to execute the migration process (disk to tape).
Directs Arcserve Backup to leave the catalog files on the disk. Use this option to store the catalog files on the staging device in the CATALOG.DB directory.
Sets the migration password and directs Arcserve Backup to encrypt the data during the migration (copy) process. To enable secure migration, you must specify a password.
Note: If the data was encrypted during the backup process for the job, Arcserve Backup will not attempt to encrypt the data again during the migration process for the job.
Enables consolidation of data from different backup jobs to one tape during the migration (copy) process. This allows you to optimize the use of space on the tape as the data is copied.
You can specify subordinate parameter switches to control the data consolidation. For data to be consolidated, you must select at least one of these parameters, but you can specify more than one to further control the data consolidation. However, if you do include multiple parameters, then all of the specified parameters must be satisfied for the jobs to be consolidated. If you do not include any subordinate parameters, the data will not be consolidated at all.
In addition, if you want to consolidate data across multiple jobs to the same tape, the backup jobs should be run on the same machine.
Note: This option cannot be used if the -DO NOT COPY is included.
Consolidates data based on the specified prefix of the media that you want to use for migration. This allows you to specify a group of media (based on prefix) that Arcserve Backup can choose from to consolidate during the migration process. If any of the media prefixes are different than the specified media prefix, the data from those jobs will not be consolidated.
Consolidates data based on the specified media pool that you want to use for migration. This allows you to specify a group of media (based on media pool prefix) that Arcserve Backup can choose from to consolidate during the migration process. If any of the media pool prefix are different than the specified media pool prefix, the data from those jobs will not be consolidated.
Specifies whether Arcserve Backup will append the consolidated data to the destination tape or overwrite the destination tape.
If you specify append, the consolidated data will be added to the existing tape that was formatted on the first day of the backup cycle.
If you specify overwrite, a new tape would be formatted daily and the consolidated data would then be added to that tape. This method is recommended when you are backing up large data on a daily basis.
The advantage of specifying the overwrite method is that a new tape would be used each day and you could ship the previous tape offsite.
If you do not specify a method for consolidation, the append method will be selected by default.
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