Dell PowerVault 720N, Command Reference Manual, Page: 272 / 606

10-2 Dell PowerVault 720N, 740N, and 760N System Administrator and Command Reference Guide
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You can use qtrees in the following two ways:
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Group files that have the same security style and oplocks setting, such as files
related to a particular activity, for example, a project, without having to create a
separate volume for them.
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Perform quick and easy backups.
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One way to group files is to set up a qtree for a project, such as one maintaining a
database. Setting up a qtree for a project enables you to do the following actions:
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Set the security style of the project without affecting the security style of other
projects.
For example, you use NTFS-style security if the members of the project use Win-
dows files and applications. Another project in another qtree can use UNIX files
and applications, while yet another project can use both Windows and UNIX files.
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Set oplocks (if the project uses Windows) as appropriate to the project without
affecting other projects.
For example, if one project uses a database that requires no oplocks, you can turn
oplocks Off on that project’s qtree. If another project uses oplocks, it can be in
another qtree that has oplocks set to On.
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Limit the disk space and number of files available to a project so that it does not
use up resources that other projects and users need. As the needs of the
projects and available resources change, you can easily change the limits on the
qtree. For instructions about managing space using qtrees, see Chapter 11,
“Quotas and Maximum Number of Files.”
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You can back up individual qtrees. You would do so to
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add flexibility to backup schedules
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modularize backups
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keep the size of each backup to one tape
For details, see Chapter 12, “data backup.”
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Volumes and qtrees have the default values shown in Table 10-1.