Руководство Пользователя для Spectra Logic spectra t120
Chapter 2. Architecture Overview
14
Partitions
Partitions divide the library logically, so that the partitioned Spectra T950 library looks
to the enterprise environment like one or more physical libraries—one library per
configured partition. The Spectra T950 library is partitioned using Shared Library
Services (SLS) technology that simplifies storage consolidation through the creation of
virtual libraries, each with its own drives and media. With this, no external software or
hardware is needed to manage mixed media within the library.
to the enterprise environment like one or more physical libraries—one library per
configured partition. The Spectra T950 library is partitioned using Shared Library
Services (SLS) technology that simplifies storage consolidation through the creation of
virtual libraries, each with its own drives and media. With this, no external software or
hardware is needed to manage mixed media within the library.
The library can be configured as a single partition or in multiple partitions. When the
library is configured into more than one partition, each partition exclusively controls
the drives and slots assigned to it. The Spectra T950 library requires, at a minimum,
one partition. Some of the advantages to running the library as a single partition
include:
library is configured into more than one partition, each partition exclusively controls
the drives and slots assigned to it. The Spectra T950 library requires, at a minimum,
one partition. 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 all backup
processes. For example, if a library has 10 drives and one partition, data can be
shared across all drives, speeding data backup. If the same library has been 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.
shared across all drives, speeding data backup. If the same library has been 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.
In some environments, partitioning into multiple virtual libraries is crucial to data
center efficiency and growth. For example, multiple partitions are extremely useful in
the following situations:
center efficiency and growth. For example, multiple partitions are extremely useful in
the following situations:
• If the environment uses multiple 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 T950
library with multiple partitions, in which each partition appears to the software as a
dedicated library.
libraries—one per backup package—the data center can use a single Spectra T950
library with multiple partitions, in which each partition appears to the software as a
dedicated library.
• If a company uses multiple databases, partitioning the library preserves the backup
processes associated with each type of database. If departments within a company
must keep their data segregated, partitioning supplies this segregation as well as
the subsequent integrity of the data set. Each partition has access only to its own
dedicated drives and media locations, and doesn’t mix media from other partitions
into its inventory.
must keep their data segregated, partitioning supplies this segregation as well as
the subsequent integrity of the data set. Each partition has access only to its own
dedicated drives and media locations, and doesn’t mix media from other partitions
into its inventory.
• If multiple protocols are running, such as Fibre Channel and iSCSI, then each
protocol attaches to its own library partition in the same physical library.
• If a site is using multiple types of media, such as LTO and SAIT, or such as LTO and
RXT media disk, then each media type must have its own partition in the same
physical library.
physical library.