2. Agenda
Introduction to Storage
Overview of DAS, NAS & SAN
Communication Model
Comparison of storage Networks
Core Technologies & Market Players
3. 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
4. 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
6. Comparison of Storage Networks
Storage Feature DAS NAS SAN
Terminology
A traditional way of storage system
Physically 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 Technologies
IDE (PATA, SATA) SCSI (SCSI,
SAS)
TCP / IP
FCP, 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 slow
Very fast (In the speed of Gb’s., Latest
one is 10Gb
Ease of adding storage
Might 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
Backup
Each volume copied separately from
server tape
Each volume copied separately from server tape
Can back up multiple volumes without
server interaction
Major Player Seagate Technologies NetApp, EMC Corp
Brocade ( SAN Equipments),
EMC(Storage Equipments)
7. Core Technologies & Market Players
Technologies Market Players Product
Networking Solutions
Brocade (McData)
Cisco
Qlogic
FC Switch
IP Switch
HBAs, SAN Directors
Storage Solutions
EMC, Hitachi Data Systems
HP, IBM
Legato Systems Inc
Disk Arrays
Territory storage
JBODs
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
8. 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
Notas do Editor
A storage is a bulk system where we can save / share the data for centralized access and management. This can be widely known as Storage Array / Tertiary storage. Consists of Disk array What is disk array? Set of high performance storage disks that can store several terabytes of data. Single disk array can support multiple points of connection to the network. purpose of disk array? Probability of unavailability of data stored on the disk array due to single point failure is totally eliminated
Why DAS? Simple and affordable storage devices ideal for localized file sharing in environment with a single or multiple servers. DAS allows you to quickly add storage capacity without the planning expense. Vendors offers DAS in USB / eSATA / SCSI / SAS interfaces Why NAS? NAS offers file-level data sharing across the network, and is the ideal for company looking for a simple and cost-effective way to achieve data access and sharing for multiple clients within the network. NAS systems can integrate into any environment and serve files across all operating platforms. With added features like RAID and hot swappable drives, Why SAN? SAN box that shares data at block level can be quickly integrated to your existing SAN infrastructure. Abbrevations: PATA – Parallel Advance Technology Attached SATA Serial ATA SCSI – Small Computer System Interface SAS - Serial Attached SCSI NTFS – New Technology File System FAT – File Allocation Table HFS- High Performance File System JFS – Journal File System UFS – Universal File System UDF - Universal Disk Format NFS – Network File System SMB – Server Message Block CIFS – Common Internet File System
SMB – Server message Block, CIFS - Common Internet File System FCP - mapping of SCSI over FC iSCSI - mapping of SCSI over TCP/IP (Emerging Technology & Comparatively slow ) FICON – Used with mainframe FCoE – Fibre channel over Ethernet HyperSCSI - mapping of SCSI over Ethernet,