Hp XP P9500 Storage Bedienungsanleitung PDF herunterladen (Seite 20)

With Thin ProvisioningWithout Thin ProvisioningAdvantages

Some file systems take up little pool space. For

more details, see “Operating system and file

system capacity” (page 67).

When physical capacity becomes insufficient,

you can add pool capacity without service

interruption.

You must stop the disk array to reconfigure it.Reduces

management costs

In addition, with Smart Tiers you can configure

pool storage consisting of multiple types of data

drives, including SSD, SAS, SATA, and external

volumes. This eliminates unnecessary costs.

P9500 product licenses are based on used

capacity.

As the expected physical disk capacity is

purchased, the unused capacity of the storage

Reduces

management labor

You do not need to use LUSE because you can

allocate volumes of up to 60 TB regardless of

physical disk capacity.

system also needs to be managed on the

storage system and on licensed P9500

products.

and increases

availability of

storage volumes for

replication

Smart Tiers allows you to use storage efficiently

by automatically migrating data to the most

suitable data drive.

Effectively combines many applications’ I/O

patterns and evenly spreads the I/O activity

Because physical disk capacity is initially

purchased and installed to meet expected

Increases the

efficiency of the data

drive across available physical resources, preventingfuture needs, part of the data drive may not

parity group performance bottlenecks.be used. Stress of concentrating I/O loads on

Configuring the volumes from multiple parityjust a subset of the storage may decrease

performance. groups improves parity group performance. This

also increases storage use while reducing power

and pooling requirements (total cost of

ownership).

Thin Provisioning advantage example

To illustrate the merits of a Thin Provisioning environment, assume you have 12 LDEVs from 12

RAID 1 (2D+2D) array groups assigned to a THP pool. All 48 disks contribute their IOPS and

throughput power to all THP volumes assigned to that pool. If more random read IOPS horsepower

is desired for a pool, then it can be created with 32 LDEVs from 32 RAID 5 (3D+1P) array groups,

thus providing 128 disks of IOPS power to that pool. Because up to 1024 LDEVs may be assigned

to a single pool, this represents a considerable amount of I/O power under (possibly) just a few

THP volumes.

This type of aggregation of disks was possible previously only by using expensive and somewhat

complex host-based volume managers on the servers. Another alternative was to use the LUSE

option to configure greater capacity.

Thin Provisioning example

The following figure illustrates the difference between storage purchases made before and after

installing Thin Provisioning software.

20 Introduction to provisioning

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