An Introduction to STORAGE NETWORKS

Agenda

Introduction to Storage Overview of DAS, NAS & SAN Communication Model Comparison of storage Networks Core Technologies & Market Players

Introduction-Storage

What is storage? A storage is a bulk system (Disk Array) where we can save / share the data for

centralized access and management

Evaluation of Storage DAS - Direct Attached Storage NAS - Network Attached Storage SAN - Storage Area Network

Advantage of Storage Networks Consolidation of Storage Centralized / flexible Administration High Availability (Improved RAID performance) Mission critical Centralized backup control Avoid Unscheduled Downtime Business Continuity services

Overview of DAS, NAS & SAN

DAS

Interface Technologies – PATA,SATA,SCSI, SAS File System Protocol - NTFS,FAT (16,32), HFS, JFS, UFS , UDF

NAS

Interface Technologies –TCP / IP File System Protocol – NFS, SMB / CIFS & also it can support all file based protocol (Vendor dependant)

SAN

Interface Technologies – Fibre Channel Protocol (FCP), Internet SCSI (iSCSI), Fibre Channel IP (FCIP),InfiniBand

File System Protocol – OS / Application Dependant

Application / SW File system Storage

Application / SW File system StorageN/W

Application / SW StorageFile system FC/GbE

Communication Model

Comparison of Storage Networks

Storage Feature DAS NAS SAN

TerminologyA traditional way of storage systemPhysically connected to a single host machine

Shares network bandwidth

User can access at file level over a LAN, a WAN, or over the Internet

Shares data at block level.

Commonly associated with Fibre Channel networks

Interface TechnologiesIDE (PATA, SATA) SCSI (SCSI, SAS)

TCP / IPFCP, iSCSI, FCoE , FCIP, InfiniBand, HyperSCSI, FICON

File System NTFS, FAT, JFS, HFS, UFS, UDF NFS, SMB / CIFS OS / Application decides

Capacity Limited to ports on the local server Not limited (Expandable) Not limited (Expandable)

Speed of accessing storage

Fast Somewhat slowVery fast (In the speed of Gb’s., Latest one is 10Gb

Ease of adding storageMight require shutting down servers to add storage

Easy (Hot – Swap) Easy (Hot-Swap)

Redundant connectivity No No Yes

Centralized management No No Yes

Ease of expansion Limited to host’s physical ports Allow modest expansion Quick and easy

Suited for databases Yes No Yes

Cost In expensive Moderately expensive Moderately expensive

Distance between server and storage

Must be close under (6 feet) Distance doesn’t matter Distance doesn’t matter

BackupEach volume copied separately from server tape

Each volume copied separately from server tapeCan back up multiple volumes without server interaction

Major Player Seagate Technologies NetApp, EMC CorpBrocade ( SAN Equipments), EMC(Storage Equipments)

Core Technologies & Market Players

Technologies Market Players Product

Networking Solutions Brocade (McData)CiscoQlogic

FC SwitchIP SwitchHBAs, SAN Directors

Storage Solutions EMC, Hitachi Data SystemsHP, IBMLegato Systems Inc

Disk ArraysTerritory storageJBODs

Backup Technologies

Symantec (VERITAS) NetBackup

HP OV Data Protector

IBM Tivoli

SAN Manger

Brocade Fabric OS

IBM Tivoli Storage Manager

HP OV SAN Manger

Symantec (VERITAS) CommandCentral Storage

High Availability / Cluster management

Symantec (VERITAS) Global Cluster Manager

HP OpenVMS, M/C Service Guard

SUN Solaris Cluster

Disaster Recovery Solutions

EMC SRDF

IBM PPRC

HDS TrueCopy

NSI Software's DoubleTake

HP SW BusinessCopy

Storage SIG in Future

Separate sessions on the Storage Networks Strong focus on SAN & Interface technologies Introduction to the emerging technology FAN Detail discussion on HA Clusters & Load sharing Detail discussion on Disaster Recovery Plans Discussion about Fault Tolerant Architecture Discussion on Associate technologies with Virtual training enabled In plant training on SAN designing with SAN Simulator