Storage Virtualization with SVC - HC · PDF fileStorage Virtualization with SVC: Simplify Procedures, Reduce Risk, Enhance Usage Klemen Ba ... However, SVC does not currently support

© 2010 IBM Corporation

Storage Virtualization with SVC: Simplify Procedures, Reduce Risk, Enhance Usage

Klemen BačakField Technical Sales Specialist, IBM Slovenija d.o.o. [email protected], GSM:040/456-607

29.09.2010

3 © 2010 IBM [email protected]

Primary CIO Storage Investment Priorities

SVC

SVC

SVC

SVC


Virtualization Everywhere

MiddlewareMiddleware

•Virtual machines

Application

SOA

Grid,Clustered applications

VM (mainframe)VMware, HyperVPowerVM (AIX)

Storage

Virtual file systems


Disk Virtualization Primer


Today's SANs

SAN SAN-attached disks look like local disks to the OS & application


Virtualizationlayer

SANs – with Virtualization

Virtual disks start as images of migrated non-virtual disks.

The 1:1 relation is not mandatory afterwards

SAN


Virtualizationlayer

Become truly flexible !

Virtual disks remain constant during physical infrastructure changes

SAN


Virtualizationlayer

Enable tiered Storage !

Moving virtual disks between storage tiers requires no downtime

SAN


Avoid planned Downtime !

Upgrade

Replacement or upgrade of the virtualization

hardware require no downtime

SAN


In-band Storage Virtualization : Compiled Benefits

Isolation

1. Flat interop. matrix2. Single point administration3. No-cost multipathing

Pooling

1. Higher (pool) utilization2. Cross-pool-striping: IOPS3. Thin Provisioning: free GB

PerformanceCACHE

1. Performance increase2. Hot-spot elimination3. Boost for old SANs

Mirroring Mirroring

×1. License economies2. Cross-vendor mirror3. Favorable TCO

License $$


Migration into Storage Virtualization (and back!)

SAN Volume Controller

SAN

ZONE

This works backwards too (no vendor lock-in)

Virtual disks in transparentImage Mode, before being converted to Full Striped



Dito with redundant SANs

SAN A

ZONE

1:4

SAN B




SAN Volume Controller : Virtualization Device

Single product number

Clustered ×2…8

SVC comes in pairs withmirrored cache (IOgroups)

Multi-use Fibrechannel in & out

Linux bootcode, 100% IBM stack

1 node pair

Acquisition cost:1. Hardware2. per-TB license3. per-TB mirroring license


3 Success Reasons for SAN Volume Controller

1. Continuity

2. Proven scalability & stability

3. Proven TCO benefits

Market leader (Gartner, IDC…)

20.000+

sold in 7 years …4 node pairs

1 node pair

* 20.000 nodes @ 3500 customers (04/2010)


Continuity … 5th Generation

Continuous development

Firmware is backwards compatible(64 bit not for 32 bit Hardware)

Replace while online

SAN Volume Controller CF8 – Firmware v5.1

SVC 4F2 - 4GB cache, 2Gb SAN (Rel.3 / 2006)SVC 8F2 - 8GB cache, 2Gb SAN (ROHS comp.)SVC 8F4 - 8GB cache, 4Gb SAN 155.000 SPC-1™ IOPSSVC 8G4 - +Dual-core Processor 272.500 SPC-1™ IOPSSVC CF8 - 24GB cache, Quad-core 315.043 4-node SPC-1 IOPS

380.483 6-node SPC-1 IOPS

MO

DE

LS

initial Release

:

:


Proven Scalability & Stability

Fleet availability: 99,999 ~ 99,9999%

Full redundancy and cache mirroring

Very low overhead (invisible 60µs)

SVC shows predictable & deterministic characteristicsunder heavy load, due to avoidance of I/O interruptsTechnology = State-loop with adapter polling

SVC v5.1

160.000 IOPS / 2-node 60µs

60µs


TCO Advantage

Isolation

1. Flat interop. matrix2. Single point administration3. No-cost multipathing

Pooling

1. Higher (pool) utilization2. Cross-pool-striping: IOPS3. Thin Provisioning: free GB

PerformanceCACHE

1. Performance increase2. Hot-spot elimination3. Boost for old SANs

Mirroring Mirroring

×1. License economies2. Cross-vendor mirror3. Favorable TCO

License $$

In many cases SVCs had a return on investment within < 18 months due to these characteristics.


Attractive Entry Price : SVC "lite"

SAN Volume Controller Entry Edition

"Lite" hardware e.g. single core

Attractive price pointapprox. 60% performance for 60% cost

Licensed for up to 250 virtualized spindles (unlimited capacity)

Optional mirroring license* is spindle-based (unlimited capacity)

FlashCopy and Multipathing for all clients included in base license

SVC Entry Edition


Attaching the Midmarket

FCiSCSI


Free SVC Features


SVC adds fine-grained "thin provisioning" to any storage

The smallestSVC grain size is 32kB

Maximizes the use of your storage

Thin Provisioning and integrated Flash Memory*

SVC

IBM non-IBM

Flash*700µs

* automated "easy tiering"to become available soon


Free Campus Failover for VMs


Symmetric Disk Mirroring with "stretched" SVC

VMHost

VMHost

SVC 1 node A SVC 1 node B

High availability + protectionfor virtual machines

VM VM

LUN1 LUN1'FC longwave Distance (x km)

One storage system. Two locations.

VM VM

VM VM


Planned & unplanned Failover Scenario

VMHost

VMHost

SVC 1 node A

VM

LUN1 LUN1'

SVC 1 node B

VMVM

VMotion, Partition Mobility, …

No LUNrescan

required

VM

VM

SVC IO group must be interconnected over 1 switch hop (no ISL)

FC FC

DR failover works w/o

training

Quorum =consistency

guaranteeSplit-brain Tiebreaker

Quorum


Solid State (Flash) Memory


333,00083,00019,000Mixed 4KB IOPs(70/30)

800,000+200,000+35,000+Read 4KB IOPs

4672GB1168GB146GBRaw Capacity

Per Cluster (Mirrored SSDs)

Per IO Group(Mirrored SSDs)

Per SSD

SVC 5 (Model CF8) with Flash SSD Option

Boost any storage with SSD drives – at the heart of the SAN

8×


New Chip-Memory

FC 15KSAS 15K

SAN Volume Controller QoS Virtualization

SATA

Flash

Applications

SVC R5 since 2009+Integrated Flash tier

SVC R5.x – 2010+Easy Tier Automation

SVC

Preview

Dynamic Assignment

(QoS-based data placement)


Copy Services Enhancements






Multicluster Mirroring "any-to-any"




Datacenter1 Datacenter 2

Datacenter 4

Datacenter 3





Multiple Flashcopies with individual "Flashback"


Saved state 12:00

Saved state 13:00

Saved state 14:00

Saved state 15:00:

×256

Reverse Flashcopy is instant. Earlier and later copies stay consistent.

Virus

t0



MS Exchange / MS SQL Data Protection / Backup


Saved state 12:00(space efficient)

Saved state 13:00(space efficient)

t0

TSM for Copy Services in conjunction with SVC's Space Efficient FlashCopy function can provide multiple, incrementally updated backups for MS Exchange and MS SQL Server.When the VSS provider for SVC 4.3 or later is configured to use Space Efficient (SE) target volumes in the pool used to satisfy VSS snapshot requests (and the background copy rate is set to 0), TSM will be able to perform frequent snapshot backups of Exchange and SQL server data volumes where each snapshot contains only the changed blocks since the prior VSS snapshot backup. There is no background copy of the full source volumes in this case so snapshots can be created at a high frequency because there is no need to wait for a background copy to finish. Thus, use of SE target volumes on SVC enables frequent, block level incremental backups to be created through VSS snapshots where multiple backup versions can be retained. However, SVC does not currently support FlashCopy restore from SE target volumes so the TSM instant restore feature is not available when SE target volumes are used. TSM fast restore (file copy) can be done from the VSS snapshot backups. These VSS backups can also (optionally) be sent to TSM server storage (tape or disk) as usual.

Since SE target volumes depend on the source volumes for any unchanged data, we recommend use of mirrored RAID configurations to protect against physical disk failures.

Check out IBM FlashCopy Manager

MS Exchange MS SQL

VSS VSS

t0

:


Open Software Interfaces


SVC Third-Party Mgmt Software available*SVC Third-Party Mgmt Software available*

Large, Gold-class VDiskswith low average load.

Drag'n'drop onto suitable storage tier, using BVQ*

SVC will manage the migration w/o disruption.

Large, Gold-class VDiskswith low average load.

Drag'n'drop onto suitable storage tier, using BVQ*

SVC will manage the migration w/o disruption.

*BVQ, Business Volume Qualicision®, from IBM Partner SVA


Free "Community" Software Tools for SVC

http://www.alphaworks.ibm.com/tech/svctools/faq

An interface and scripting tools using Perl for

automating tasks in SAN Volume

Controller


Managed Disk Group

Cluster: All nodes participating in a logical SVC instance and ‘knowing’ the virtual layout.

SAN Volume Controllers nodes

Managed Disks: Hidden beneath SVC. Static. Typically grouped in pools of LUNs from each storage device, RAID level, or rpm speed.

SAN Volume Controller Naming Scheme

I/O Group I/O Group

Virtual Disks:May have ‘any’ size, independent from underlying storage layout.

IO group: Two nodes keeping write cache consistency. An IO is acknowledged when both caches accept the write operation.

Managed Disk Group


Available Virtual Disk Modes in SVC

Virtual Disks

MDG1

MDG2

MDG3

Image Mode:Pass thru; Virtual Disk = Physical LUN

Sequential Mode:Virtual Disk mapped sequentially to a portion of a managed disk

Striped Mode:Virtual Disk stripedacross multiple managed disks (=preferred mode)

A

A

B

B

C

CC


SVC Integration in Fabrics


No need to change theSAN layout!

SVC Drop-in Installation in single or dual fabrics

8 ports per Node-pair

4 ports

4 ports

Simple or redundant

SAN fabrics supported

Free MultipathingMPIO

SAN1 SAN2


Simplified Zoning / Masking


Simplified Zoning with SAN Volume Controller

Static Device Zone:Devices are zoned only to the SAN Volume Controller.

This does never change.(except for subsystems replacement)

Static Host Zones:Hosts are zoned only to SAN Volume Controller.

This does never change.

SAN Volume Controllernode pair


Traditional Zoning X-to-Y Complexity

Traditionally, host systems are zoned to

the disks they are allowed to ‘talk’ to.

Zoning administration is “duplicate work” and needs to always match LUN mapping.


TESTED & Approved Compatibility


SAN Volume Controller – Ever growing Support Matrix

Current Version on ibm.com/storage/svc under “Interoperability”.

SANVolume Controller

SAN with 4Gbps fabric

HPMA, EMA, MSA

EVA 4/6/8400XP 24000/20000

HitachiLightningThunder

TagmaStoreAMS, WMS, USP

EMCCLARiiONSymmetrix

MicrosoftWindowsHyper-V

IBM AIXIBM i 6.1

SunSolaris

HP-UX 11iTru64

OpenVMS

Linux(Intel/Power/zLinux)

RHELSUSE

IBMBladeCenter

SAN

SANVolume Controller

Continuous CopyMetro MirrorGlobal Mirror

(log file enhanced)

VMware

Point-in-time CopyFull volume, Copy on write

256 targets, Incremental, Cascaded

Space-Efficient

NovellNetWare

SunStorageTek

IBMDS

DS4000DS5000DS6000DS8000

IBMESS,

FAStT

1024Hosts

iSCSI to hostsVia Cisco IPS

(native iSCSI in R5)

IBMN series

NetAppFAS

SGI IRIX

IBM N series& Netapp Gateway

IBM TS7650G

BullStoreWay

FujitsuEternus

NECiStorage

Space-Efficient Virtual DisksEntry Edition software

Virtual Disk Mirroring

AppleMac OS

PillarAxiom300, 500

600

IBMXIV

IBMz/VSE


Summary


– Simplified administration, including copy services: 1 same process

– Online re-planning is now possible due to great migration flexibility

– Storage effectiveness (ongoing optimization) can be maintained over time

– Move applications up one tier as required, or down one tier when stale

– Don't care about data placement on RAID arrays, just define striped pools

Summary : When to consider Disk Virtualization?

1. Low capacity utilization

2. Compatibility chaos

3. Too high migration effort

4. Unhappy with storage performance

5. Too complex site failover process

6. Need to realize quick ROISVC


Documents

Storage Virtualization with SVC - HC · PDF fileStorage Virtualization with SVC: Simplify Procedures, Reduce Risk, Enhance Usage Klemen Ba ... However, SVC does not currently support