Release Note для Spectra Logic spectra t120
Partitions
December 2008
Spectra T950 Library
43
Data Partitions
Data partitions divide the library logically, so that the partitioned library
looks to the enterprise environment like one or more physical libraries—
one library per configured data partition. The library is partitioned using
Shared Library Services
looks to the enterprise environment like one or more physical libraries—
one library per configured data partition. The library is partitioned using
Shared Library Services
™
(SLS) virtualization technology that simplifies
storage consolidation through the creation of virtual libraries, each with its
own drives and media.
own drives and media.
When partitions are enabled, no external software or hardware tools are
required to manage mixed media within the library. Instead, the library
can be configured into separate partitions for each type of media. Each
partition has exclusive access to the drives and chambers assigned to it. In
addition, each partition can control the transporter to move media within
the partition. The library requires, at a minimum, one partition.
required to manage mixed media within the library. Instead, the library
can be configured into separate partitions for each type of media. Each
partition has exclusive access to the drives and chambers assigned to it. In
addition, each partition can control the transporter to move media within
the partition. The library requires, at a minimum, one partition.
In some environments, partitioning the library into multiple virtual
libraries is crucial to data center efficiency and growth. For example,
multiple partitions are extremely useful in the following situations:
If groups within your company use different backup software
libraries is crucial to data center efficiency and growth. For example,
multiple partitions are extremely useful in the following situations:
If groups within your company use different backup software
packages, each software package requires its own dedicated library.
Instead of maintaining multiple physical libraries—one per backup
package—the data center can use a single Spectra Logic library with
multiple partitions, in which each partition appears to the software as a
dedicated library.
Instead of maintaining multiple physical libraries—one per backup
package—the data center can use a single Spectra Logic library with
multiple partitions, in which each partition appears to the software as a
dedicated library.
If your company use multiple databases, partitioning the library
preserves the backup processes associated with each type of database.
For example, if each department in the company must keep their data
segregated, partitioning the library supplies this segregation, as well as
the subsequent integrity of the data set. Each partition can only access
the drives and cartridge locations assigned to it. Data from other
partitions cannot become intermixed with the data stored on the media
in the partition’s inventory.
For example, if each department in the company must keep their data
segregated, partitioning the library supplies this segregation, as well as
the subsequent integrity of the data set. Each partition can only access
the drives and cartridge locations assigned to it. Data from other
partitions cannot become intermixed with the data stored on the media
in the partition’s inventory.
If your company uses multiple protocols, such as Fibre Channel and
Gigabit Ethernet, then each protocol is assigned to its own partition
within the same physical library.
within the same physical library.
If your data center uses multiple types of media, such as LTO and RXT
media packs, then each media type must have its own partition, each
with its own drives.
with its own drives.
Some of the advantages to running the library as a single partition include:
Increased drive availability due to the fact that all drives are available to
Increased drive availability due to the fact that all drives are available to
all backup processes. For example, if a library has six drives and one
partition, data can be shared across all drives, speeding data backup. If
the same library is split into two partitions, some drives may be left idle
in one partition, while the others are used for a backup process running
in another partition.
partition, data can be shared across all drives, speeding data backup. If
the same library is split into two partitions, some drives may be left idle
in one partition, while the others are used for a backup process running
in another partition.
No extra costs incurred by software licensing, server requirements, or
cabling complexities.