Snapopc+ Outline; Preparations For The Advanced Copy Function - Fujitsu Eternus DX100 S3 User Manual

Chapter 4 Copy Function Settings and Display
4.1 Advanced Copy Management
Manage the Advanced Copy function by performing copy operations, and checking and deleting copy sessions
after preparing the Advanced Copy function.
4.1.1

SnapOPC+ Outline

SnapOPC+ is a function that, to the server, appears to copy a volume (the copy source) in an ETERNUS DX to a
different volume (the copy destination) in the same ETERNUS DX at a specific point in time. Only a logical
copy is performed initially, following which the SnapOPC+ records changes as the data is updated.
Access to changed areas is then referenced via the SnapOPC+ record, while access to the unchanged areas is
transparently passed back to the original data (in the copy source area).
The expected amount of updates must be considered when deciding the size of the copy destination area.
By its nature, SnapOPC+ is best used for the temporary backup to tape of file server files and other low
modification rate data, as provision against operating failures and software errors.
Allows generational
management of data
updates (providing
diff history information)
4.1.2

Preparations for the Advanced Copy Function

4.1.2.1 Basic Settings
■ License registration
Register a license for using the Advanced Copy function.
If a license is not registered, the Advanced Copy function cannot be used.
[Example]
Registering a license key "1928569802345721"
CLI> set advanced-copy-license -key 1928569802345721
■ License registration status check
Check the status of the Advanced Copy license registration.
[Example]
CLI> show advanced-copy-license
Seen by server to have
the same capacity as
the original volume
In actually, only the
changes to original data
are copied and kept
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ETERNUS CLI User's Guide
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