Hitachi Unified Storage VM, Руководство по обзору продукта

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System overview
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Hitachi Unified Storage VM Product Overview Guide
added at any time to meet new application or business needs, or consolidate
disparate storage all with a single point of management, without downtime.
These systems offer a total usable capacity of from 4 to 8 PB under a single
namespace, all easily managed from a central system management
console.
The Hitachi File System is built around the object store, a collection of object
structures referring to data on disks , and a set of rules. These rules govern
the organizational layout and management of objects in the object store.
The techniques behind creating, copying, moving, migrating, and deleting
the objects in the object store make the Hitachi File System extremely
effective and efficient.
Tiered file systems decrease file access times by placing file metadata on
the highest performance storage, while file content is placed on storage with
less performance. A policy-based automatic file migration feature helps
organizations move data among storage and archive tiers whether internal
to the data center, or externally from remote or branch offices. The cluster
namespace functionality provides a single namespace with a directory
structure that is independent of where data actually resides in physical
storage. Virtual servers are used to group server resources to match the
needs of application or organizational requirements. In a clustered
environment, file systems can be quickly relocated among physical servers
for load balancing, and virtual servers automatically migrate in a cluster
failover scenario.
Features
This section describes the key features and benefits of the Unified Storage
VM storage system file module.
Scalability
The Unified Storage VM storage system file module is highly scalable and
can be configured in several ways as needed to meet customer
requirements, without impacting performance.
The Hitachi File System can support billions of files in a single file system
and millions of files in a single directory, while keeping directory search
times to a minimum and sustaining overall system performance. Combined
with cluster namespace, the Hitachi File System can support many
petabytes in a single unified namespace and present it all as a single file
system accessible to many concurrent hosts, through a single mount point
if desired.
The basic configuration is a single rack containing one NAS server and up to
8U of disk storage, as shown in the following figure.