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© 2011 IBM Corporation

Storwize V7000


IBM Storage Systems

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The Storwize V7000 uses basic storage units called managed disks and collects them into one or more storage pools

These storage pools then provide the physical capacity to create volumes for use by hosts

Volumes

Storage Pool

Managed Disks (MDisks)

Logical Building Blocks


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Managed Disks

The basic unit of storage in the Storwize V7000 is the managed disk or MDisk for short

A managed disk must be protected by RAID to prevent loss of the entire storage pool

In Storwize V7000 we can have two different types:– Internal Array MDisk

• The internal RAID implementation inside the system takes drives and builds a RAID array with protection against drive failures

– External SAN attached MDisk• An external storage system provides the RAID function and presents

a Logical Unit (LU) to the Storwize V7000


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Storage Pool A storage pool is a collection of managed disks

The primary property of a storage pool is the extent size which by default using the GUI is 256MB– This extent size is the smallest unit of allocation from the pool

When you add managed disks to a pool they should have similar performance characteristics:– Same RAID level – Roughly the same number of drives per array– Same drive type (SAS, NL SAS, SSD except if using Easy Tier)– Similar performance characteristics for external storage system

MDisks

This is because data from each volume will be spread across all MDisks in the pool, so the volume will perform approximately at the speed of the slowest MDisk in the pool– The exception to this rule is that if using Easy Tier you can have 2

different tiers of storage in the same pool – but the MDisks within the tiers should still have the same performance characteristics


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Whenever you create a new volume you must pick a single storage pool to provide the physical capacity

By default the created volume will stripe all of it’s data across all the managed disks in the storage pool as shown on the left diagram

Thin provisioned volumes consume extents only as actual data is written to disk

A2

A6

B1

B5

A3

A7

B2

B6

A4

A8

B3

B7

A1

A5

A9

B4

B8

A1 A2 A3 A4 A5 A6 A7 A8

B1 B2 B3 B4 B5 B6 B7 B8

A9 Volume A

Volume B

Volumes

Managed Disks

Volumes

Thin ProvisionedVolume CC1 C2 C3 C4 C5 C6 C7 C8

C1

Storage Pool


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What is the Storwize V7000 Physically the Storwize V7000 system is

comprised of…

One Control Enclosure containing...– Two node canisters– Two PSUs (Power Supply Units) – 24 x 2.5” disk drives or 12 x 3.5” disk drives

Optionally up to nine Expansion Enclosures per one controller enclosure, containing...– Two expansion canisters– Two PSUs (Power Supply Units) – 24 x 2.5” disk drives or 12 x 3.5” disk drives

These expansion enclosures may be freely inter-mixed in a single storage system

Disk drives: – 15 K RPM SAS– 10 K RPM SAS– SSD– Nearline

Clusters of up to 4 Control Enclosures / 8 nodes

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Canister Details

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Node Canister– Intel CPU running at 2.1GHz– 32GB internal flash drive– 8GB Cache – Four 2/4/8 Gbps Fibre Channel ports

• Usage optional, for external storage and/or for server attachment

– Two USB 2.0 ports

– Two 10/100/1000 Mbps Ethernet ports • Port 1 usage required • Port 2 usage optional

– Two 6 Gbps SAS ports • Usage optional for expansion enclosures

– The four ports on the bottom right will be blanked out• May be used in the future

Expansion Canister

Two 6 Gbps SAS ports– Usage of port 1 is mandatory– Use of port 2 is optional for

adding additional expansion enclosures


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Control Enclosure Rear View2076-112/124

Expansion Enclosure Rear View2076-212/224

SAS Ports and Cabling

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SAS Ports and Cabling


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Storwize V7000 Advanced Functions Thin Provisioning – Included

– Allows for storage optimization by consuming real capacity only when data is written

FlashCopy – Included– Allows use of FlashCopy function with internal Storwize V7000 volumes as

well as external storage under Storwize V7000 management– FlashCopy Manager optionally available to help manage

Easy Tier – Included– Allows for management of hotspots automatically by migrating extents

from spinning drives to solid state drives as needed for higher performance– TPC for Disk Midrange Edition optionally available to help manage

Metro and/or Global Mirror – Optional– Allows you to replicate data synchronously or asynchronously between

Storwize V7000 systems– TPC for Replication optionally available to help manage

External Virtualization – Optional– Allows you to bring external fibre channel disk systems under Storwize

V7000 control providing access to all the functions of the virtualization software


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Easy Tier SSDs (Solid State Drives)

– Very high performance but expensive per GB– To get the most value from SSD investment it is

important to use SSDs efficiently

Although Volumes that require higher performance can be identified, in general only a portion of a Volume really requires or benefits from the extra performance that an SSD provides– It is desirable then to have only a portion of the Volume

reside on the SSD freeing up the space on the SSD that is “wasted” on this Volume for other Volumes to utilize


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Easy Tier

Initial implementation will have two tiers:– generic SSD which is tier 0– generic HDD which is tier 1

Internal MDisks will have tier chosen automatically

External MDisks will have tier assigned by the user– Will default to generic HDD

Easy Tier is designed to work with either Storwize V7000 internal SSDs or SAN based external SSDs

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Easy Tier – STAT Summary Output


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Easy Tier – Volume Heatmap View


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Data Migration by Volume and Sub-Volume

SSD Storage Pool HDD Storage Pool

Hybrid Storage Pool (SSD & HDD)

Easy TierEnabled in Hybrid Pool

Existing Volume Based Data Migration

Easy Tier Automated Data Migration


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Easy Tier – Automated Data RelocationHost Volume Hybrid Storage Pool

MDisk from SSD Array

MDisks from HDD Arrays

Extent Virtualization

Hot Extents Migrate Up

Cold Extents Migrate Down


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Internal Storage – RAID

The Storwize V7000 setup will contain a number of internal drive objects, but these drives cannot be directly added to storage pools

The drives need to be included in a Redundant Array of Independent Disks (RAID) to provide protection against the failure of individual drives

Storwize V7000 will support the following RAID levels:– RAID 0 (striping, no redundancy)– RAID 1 (mirroring between 2 drives)– RAID 5 (striping, can survive one drive fault)– RAID 6 (striping, can survive two drive faults)– RAID 10 (RAID 0 on top of RAID 1)

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RAID Setup

One click GUI RAID setup

A one click GUI setup exists to configure all drives into RAID arrays– Automatically create spares and optimize for capacity – meaning utilize

all drives

Select preset Select the drive class

Select the preset from the list shown– The list provided will depend upon the drive class selected

Decide whether to create spares

Choose the creation policy– Optimize for performance or capacity

Chose the number of drives to provision


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Visual task flow guidance

Integrated videoinstruction

System statusalways available

Systemrecommendations

Link to more information if

needed

Fresh New User InterfaceBased on the well-received XIV interface


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New Easy-to-Use User Interface

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Browser-based can be accessed from any platform

Relevant visuals One click Presets available to

simplify administration Advanced options available

along with full CLI control Easier navigation between

screens guides users to next step

See command-lines that are being executed when you perform actions in the UI

Provision a volume in as few as six clicks; setup system in as few as ten clicks


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Storwize Command Line Interface (CLI)

A flexible tool for system management

Setup of CLI for Storwize on windows– Generate encryption keys– Establish secure connection


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Presets “Templates” of commonly used and recommended input

parameters for:– RAID Array Creation– Volume Creation– FlashCopy Creation

Only applicable on create– Preset defaults can be overridden using advanced settings

option in GUI or changed after creation via the GUI or CLI• Example: Mirrored volume preset is chosen with default

sync rate of 2MB/s and to increase use GUI or CLI to change to something higher


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VIOS

VIOS

IBM i

Storwize V7000 Connection to IBM i

Managed Disks

Volumes in SVC (Virtual Disks)

Storage Pools

Hdisks in VIOS

VTSCSI

IBM i disk drivesvscsi

FC conneciton


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Recommeded configuration for IBM iBased on best practice with IBM i and midrange storage

146 GB 15 K RPM disk drives

300 GB 15 K RPM disk drives

General recommendation is RAID-10–Recommended RAID level depends on the workload

characteristics

Create Vdisks in stripped mode

Extent size 256 MB

Size of LIUNs: 70 GB or 140 GB

Multipath with 2 * VIOS

Sufficient respources in VIOS

Check that Queue-depth in VIOS is set to 32 or higher


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PowerHA SystemMirror for i and SVC / V7000


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Screenshots of Storwize configuration for IBM i

© 2011 ibm corporation storwize v7000. © 2011 ibm corporation ibm storage systems 2 the storwize...

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