copyright ©2003 digitask consultants inc., all rights reserved storage area networks digitask...

Copyright ©2003 Digitask Consultants Inc., All rights reserved

Storage Area Networks Digitask Seminar April 2000

Digitask Consultants, Inc. [email protected]


Storage Area Networks (SAN’s)

• What Is A SAN ?

• What Is The Justification ?

• Why Is Fiber Recommended ?

• Why Is It Needed ?



W AN

Data

Data Data

Data

SAN

GB-TBGB-TB

Storage Arrays

TownLANServers



• SAN Consists Of Connections, Hardware & Software.

• Dedicated Entirely To Storage.

• Uses Fast Fibre Interconnect Technology.



• Obvious Dramatically Better Results In Data Sharing, Consolidation, Accessibility Management, & Security Of Enterprise Resources.

• SANS Give Better Than 20% Average Increase In Storage Utilization Rate.



• SANs Can Allow For A Better Than 50% Reduction In Tape Utilization.

• SAN’s Allow For A Major Increase In Storage Productivity.

• SAN’s Give Better Access To Remote Mirrors & On-line Backups.



Storage Area Network’s

LINUXLINUX

Tru64Tru64

OVMSOVMS

FibreChannelSw itch

Storage ArrayW ith

Dual HSG80's w256 MB Cache


SAN Concepts Storage Array

D isk D rive (9 ,16 ,36,72 G B)

Shelf Power Supp ly

D isk C ontro lle rs (H SG 80's)

o 64 - 512 M B o f C ache

o Supports 72 U ltra SC S ID isks

o 36,000 I/O 's Per Second

o F ibre C hannel R uns 200M B Per Second O n

H SG 80 Pair, eg H SG 82



• Data Replication Manager (DRM)Allows Real-time Copy Of Data On-line To

Local Or Remote LocationsData Replication Performed At Controller

Subsystem Level Without Affecting Host Activity.

DRM Works On Fibre Channel RA8000 and ESA12000.



• Using Data Replication Manager When The Cost Of Unavailable Systems & Data

Loss Over Shadows The Cost Of Duplication Of Systems.

A Need To Recover From An Outage In A Very Short Time Exists.

Business Continuation Necessity.Estimate Downtime Costs Between $15K To

$6.5M Per Hour !


Now, let’s talk about...


Availability Classification

Availability Classification

Uptime Levels (%)

Uptime Levels (%)

Fault TolerantFault Tolerant 99.999999.9999 < 1 minute< 1 minute

Extremely High AvailabilityExtremely High Availability 99.999 99.999 5 minutes5 minutes

Fault Resilient ClustersFault Resilient Clusters 99.9999.99 53 minutes 53 minutes with Failoverwith Failover

High AvailabilityHigh Availability 99.999.9 8.8 hours8.8 hours

Commercial AvailabilityCommercial Availability 99.599.5 43.8 hours43.8 hours

Annual Downtime

Annual Downtime

How much availability do you really need?

Sources: Gartner Group, Transaction Processing Performance Council, Compaq


Source: Gartner Group and Contingency Planning ResearchSource: Gartner Group and Contingency Planning Research

FinancialFinancial Brokerage operationsBrokerage operations ??????????????$ 6,500,000$ 6,500,000

Average Cost per Hour of DowntimeAverage Cost per Hour of Downtime

IndustryIndustry ApplicationApplication

FinancialFinancial Credit Card SalesCredit Card Sales ??????????????

MediaMedia Pay Per ViewPay Per View ??????????????

RetailRetail Home Shopping (TV)Home Shopping (TV) ??????????????

RetailRetail Catalog SalesCatalog Sales ??????????????

TransportationTransportation Airline ReservationsAirline Reservations ??????????????

$ 2,600,000$ 2,600,000

$ 90,000$ 90,000

$ 150,000$ 150,000

$ 113,000$ 113,000

$ 89,500$ 89,500

Cost of Downtime


Backup Issues Backup becomes difficult because

Storage capacities are increasing faster than customers have planned.

On-line applications require no “unavailability” time due to 24x7 operations

Product costs are far less than management costs and “unavailability” costs

Performance is hard to model because components work serially and the solution is only as good as the slowest component

Customers realize their “true risks & costs” only when a restoration is needed

No tape standards exist and there is no single ISV that supports all operating systems


Network BackupNetwork Backup Direct BackupDirect Backup

Drive or LibraryDrive or Library Many Drives or LibrariesMany Drives or Libraries

Traditional Backup Methods

Benefits:• Minimal Hardware/software • Centralized Administration • Broad Connectivity

Drawbacks:• Network can be very slow

Benefits:• High Performance Rates

Drawbacks:• Maximum Hardware/software • No Centralized Administration • No Broad Connectivity


Puts Tape storage on a high-speed, independent Fibre Channel (100MB/sec) dedicated data backbone

Leverages current high performance DLT and Library technology including scalable Compaq DLT Mini-Library model

Provides a centralized, automated backup solution for multiple servers

Offers greater performance with less hardware than traditional LAN-based data management

Eliminates data traffic associated with a network backup Functions with standard backup software if needed

Digitask’sAlternativeEnterprise Backup Solution - Fibre Channel

Backup & Restore



• Data Replication Manager (DRM) FeaturesNo Single Point Of Failure (NSPOF).Host Independent Copy Operation.Data Protection Over 10KM to 40KM.Fibre Channel Data Xfers At 100MB/sec.Supports RAID Configurations (0,1,0+1,3/5).Bi-directional Remote Copy.


Storage Area Networks (DRM)

FibreChannelSw itch


Multi-Site SAN With EBS & DRM

StorageW orksCommand Console

StorageW orksC om m and C onsole

TL895DLT Library

FibreChannel

TapeController

Fibre Channel StorageArray ESA12000

Fibre Channel Switches

ProductionSite A

ProductionSite B


SANworks Strategy• Open SAN accessibility• Storage virtualization

– Enable flexible storage pooling for unprecedented scalability, granularity, availability, and serviceability

• Data protection and replication for fast recovery– Replace traditional backups with virtual snapshots and

physical clones that can be recovered quickly– Make distance transparent to remote replication


Enterprise Backup & Virtual Replicator (WNT & Win 2000)

Ethernet

V irtualD isk

V irtualD isk

D isks A ppear A s Loca lD rives

Snap Shots To Tape

Pool

Pool

Pool

GB-TBGB-TB

Automated Tape Array

F

Fibre Channel FabricSw itch

Storage Pools

VirtualD isk

DiskBlock

Mapping

VirtualDisks

Fibre Channel tapeController II

W NT ClusterW NT Server

W NT Server


Next Step in the ENSA Evolution: Next Step in the ENSA Evolution: Open SANsOpen SANs

Homogeneous Homogeneous SANsSANs

Shipping TodayShipping Today

The Next StepThe Next StepHeterogeneous Heterogeneous SANsSANs

Open SANsOpen SANs


Cluster Storage Server(Network Attached Storage)

Ethernet

Hub

M em ory C hannel H ub

A lpha ServerA lpha Server

Enterprise S torage A rray

Minicom puter

Com puter


Wide Area Cluster Concepts

• Definition of Wide Area Cluster (WAC)

> Some Nodes Separated from Others

> Implies Separate Computer Facility

> Distance Varies


Types Of WAC

• Remote Cluster Node• Multi-site Cluster• Disaster Tolerant Cluster

> Duplication Of Hardware


Wide Area Cluster

ALPRD3(A lpha 4100)

sys.disk

datadisk

datadisk

ALPRD1(A lpha 4100)

ALPRD2(A lpha 4100)

D isk ControllersD isk Drives

Robotic TapeBackup

Subsystem(3 TZ89Tapes)

M ultip le ConnectionsBetween Controllers &

Star Couplers

E thernet

N ew York C ity F inancia lD istrict

Ethernet


WAC Shadow Data Move

ALPRD3(Alpha 4100)

ALPRD1(Alpha 4100)

ALPRD2(Alpha 4100)

RoboticTape

BackupSubsyst

em(3 TZ89Tapes)

Multiple ConnectionsBetween Controllers &

Star Couplers

Ethernet

N ew York C ity F inancia lD istric t

Ethernet

Data Data DataShadSet

ShadVol

Data DataData

Data Data DataShadVol


Questions ?????

• Digitask Consultants• 212-682-6652/WWW.DIGITASK.COM

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