2. Investigaciones previas
2.3 Fundamentaciones
For information about the Include/Exclude screen for Virtual Machines, click
here.
If you select Data Files on the Source screen, the Add button opens the Include/Exclude screen. From here, browse for files or directories and select them. To include a file or directory, highlight it and click Include (or double-click it). To exclude a file or directory, highlight it and click Exclude.
You can use the Ctrl and Shift keys to help you make your selections. You must include at least one file in your backup or recovery.
If you choose an entire directory, the Confirm Include screen appears. Select Recursive if you want to include/exclude all subdirectories and files.
Otherwise, filter to specify the files that you want. Use filtering formats similar to the following examples.
Syntax Meaning
sample.txt Include the file called sample.txt
*.txt Include all .txt files
*.* Include all files in the selected directory
If you enter a list of filters, use semicolons to separate them: *.txt;*.exe;*.htm
Note: Wildcard searches do not work for file names that contain semicolons. The Confirm Include and similar screens allow you to apply their settings to some or all of the directories that you have chosen:
After you finish making your Include/Exclude selections, click OK. The Source screen returns. Click Next to continue.
Exclusion Tree Scanning
The selection with the most detail takes precedence. This allows for nesting of multiple inclusions and exclusions. In these cases, the filtering avoids traversing excluded directories.
Folder/Container Wildcards
Wildcards are supported on file folders and MAPI containers, for use during backup only.
* (asterisk) - signifies a wildcard string up to the next separator character. ? (question mark) - signifies a single wildcard character.
. (period) signifies a recursive directory. Examples
*.txt - selects all files that have the txt file type.
C:\.\*.doc - selects all files on drive C that have the doc file type. t*.* - selects all files that begin with the letter t.
Note: Not all Plug-Ins (for example, the VMware ESX Console Plug-In) support multiple wildcards in-line.
In Windows, files or directories that contain reparse points display in red.
File Backup Options
If you select Data Files > Options, you can choose options for file backups. Backup files opened for write
This option allows you to back up files that are open while the backup is in progress. Files that are open for write, and also opened for shared read, can be backed up. However, files open only for exclusive write cannot be backed up. The danger in backing up files that are open is that you are not guaranteed to get a copy of the file at that time. Therefore, an open file might be modified during the backup process, producing inconsistencies in the backup copy. Note: Agents 6.70 and above use VSS (Volume Shadow Copy Services) by default for open file management. The following descriptions of OTM and OFM products are applicable to Agent 6.61 and older. OTM can still be used with older Jobs or in a custom manner, but it is not used by default. See the corresponding Agent guide.
Suppress archive bit processing
When a file is created or modified, an archive attribute (depending on the OS) can sometimes be placed in that file. The archive bit tells some programs that the file requires backup. By default, the application clears the archive bit when it backs up a file.
If you are using other backup programs that rely on archive bits, enable Suppress archive bit processing. This leaves the archive bit intact. NetWare options
Support NetWare file compression
If this option is enabled, the software backs up NetWare files in compressed format. This feature is useful for files that are rarely modified. Note however, that the backup Delta processing feature does not work on compressed files. Each time the compressed file is accessed, the backup sees the entire file as new and must reseed it.
Advantages
• Backing files up in their native compressed form ensures that they will be restored in compressed form, reducing or eliminating the possibility of a disk full situation.
• Backing files up in their native compressed form reduces CPU overhead because it does not require compression/decompression during actual backup/recovery.
Disadvantages
• Files can only be backed up in their native compressed form if the OS supports NetWare compression, and compression is enabled on the volume to which the files are restored.
• When files change from compressed to uncompressed, or from
uncompressed to compressed, the application must back up that file in its entirety. If the compression settings in NetWare are too aggressive
(meaning a lot of compression state changes are occurring) the Delta processing will be inefficient.
• Currently, natively compressed files cannot be restored to an NSS volume.
This option is not enabled by default. NetWare files are backed up in
uncompressed form, enabling full Delta processing and often saving storage costs over the long term. Note, however, that you will require significantly more room on your system for the restored files if your original files were compressed. If you choose to support NetWare compression, you can detect changes during Quick File Scanning. This detects whether or not the data has been converted by the OS from uncompressed to compressed, causing a reseed. Any file streams that are deemed unchanged since the last backup are skipped. The default is to read files in their entirety.
Unix options
If you choose to back up a single instance of the selected hard-linked files, the backup is slower, but smaller, as only the actual data (one copy) and the hard links are backed up. During recovery, the data and all the hard links are restored.
If you do not enable the Backup a single instance option, the backup is faster, but the backup size may be larger. This is because the data and each link are copied separately, and restored separately. The hard links are not re-established in this case.