SAN

1
Agenda

• SAN
• Business and Management Drivers
• Trends
• Evolution
• SAN Implementation for backup
• Backup Software
• Automation
• DAT/DLT/LTO
• Autoloaders
• Libraries
• Customer Experiences
• Demonstration

Bijan Assaee Lynx Technologies Bijan_at_lynxtech.com.
au Tel [phone] Fax [phone]
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The Amount Of Storage ...
300
250
Average ServerGB
200
150
HDD
100
B/UP
50
0
1997
1998
1999
2000
2001
2002
2003
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Server Storage Architecture TODAY !!

• Current Server Storage Architecture is based on
  parallel SCSI, which has served us well for
  more than a decade.
• SCSI is not intended for networking
• Present and future storage requirement would pose
  a big challenge to the current Server/Storage
  Architecture due to - Distance limitation (3m
  for SE, 25m for Diff) - Performance limitation
  (160MB/s) - Connection limitation (max 16
  devices including hosts)
• LAN limitations for backup

4
Storage Area NetworksAllow Storage devices to
reside on a dedicated fibre channel network and
be shared across multiple servers

• Scaleable capacity
• Modular and adaptive architecture
• High Availability Architecture
• Cross platform solution
• High I/O performance throughput
• Ability for data and device sharing
• Geographical coverage of up-to 10 km
• Management tools and centralised
  administration of storage

5
Storage Area Networks Trends

• All System and Storage Vendors provide SAN
  technology as the dominant server to storage
  connectivity
• Customers trends indicate that SANs will be the
  dominant connectivity method for servers to
  storage devices

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SAN Industry Adoption
Systems
Storage
Systems
Storage
Software
7
Storage Revenue
Annual Vendor Revenue
Source Dataquest 12/99
By 2003 SANs will represent over 40 of the
market
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SAN Management Drivers
Source Enterprise Management Associates 2/2000
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SAN Business Drivers
Source Enterprise Management Associates 2/2000
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SAN Cost Savings
Source Forrester Research, Inc. Vol. 16, 1
11/98
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Storage Area Network Topology - Loop (FC-AL)

• Uses a loop topology to create the logical point
  to point between ports.
• Bandwidth of the loop is shared by all ports
• Typically implemented using a Fibre Channel Hub
  for ease of connectivity
• allow sharing of storage resources (not
  necessarily data)

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Storage Area Network Topology - Fabric/Switched

• work like a telephone system.
• allows multiple pairs of nodes to communicate
  simultaneously at 100MB/s
• cost more as it requires transceivers, cross
  point switching function and the intelligence
  to make the connection

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SAN Market Evolution
Homogeneous (Same Operating System) SANs to
Heterogeneous
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SAN Market Evolution
Applications and Management
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SAN Fabric Elements

• Server Nodes
• Connected via Host Bus Adapters (HBA)
• Storage Nodes
• Enabled via SCSI over Fibre Channel
• Fabric Interconnect
• Fibre Channel Arbitrated Loop Hubs
• Fibre Channel Switches

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SAN Fabric Management

• FC Switches and (some) Hubs have management tools
• Accessed through out-of-band Ethernet ports or
  in-band FC
• Can be integrated via SNMP management
• Can typically start, stop, and manage FC
  communications
• Can be used to troubleshoot failed network
  components

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SAN - Zoning
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Single Server Backup

• Ease of operation
• Scheduling
• Automation
• Disaster recovery
• On-line backup of open files, databases and
  applications
• Backup within available window

• High performance
• Choice of software packages
• Manageable Operations
• Improvement through automation

19
Backup Software

• Platforms
• NT, NW, UNIX
• Backup Agent vs Client
• Online Backup feature
• SQL, Oracle, Sybase, Informix
• Open Files
• Exchange, Lotus Notes, GroupWise, SAP
• Disaster Recovery
• Other features
• Library Support
• Storage Area Network Support
• RAID option
• Multi-Host library connection
• High availability systems support

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Backup Questions

• For Each Server
• Operating System
• Capacity expected growth
• Database or Applications
• Time available to backup?
• Centralised, automation
• Tape duplication?
• Network protocol/bandwidth
• Backup methodology
• Full/Incremental/differential
• Tape management daily/weekly etc

Clients
DAT DLT DAT/DLT Autoloader
NT or NW or UNIX
SCSI
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Typical customer environment
Clients
NetWare
UNIX
NT
SCSI

• Multiple servers, sometimes different platforms
• Different software for backup
• Diverse hardware technologies
• Management and operation issues / costs

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Use of Autoloaders for Automation
Clients
SCSI

• Simplified operation
• Autoloader connected to the largest server
• Other servers are backed up through the Network
• Network constraints
• 50-100GB total capacity (about 3 servers)

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Use of Tape Libraries for Automation
Tape Library

• Automated centralised backup
• Easy to operate and manage tapes
• Consistency in backup strategy
• Tape duplication for off-site storage
• Capacity from 100 GB and above

• Performance Considerations
• Main Issue - LAN Performance
• Disk
• File system
• Operating System
• SCSI card

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Use of Tape Libraries for Automation

• Reduce Network Constraints
• Improved performance
• Directly attach high capacity servers
• Centralised Management
• Ethernet still a limitation
• SCSI length limitations
• Only a few backup software support this
  configuration

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Use of Tape Libraries for Automation
Primary Client Network
Backup Client NT file server
Backup Client NT file server
Backup Client NT file server
Each backup client has a 2nd network card for the
dedicated backup network
Network Switch (100baseT)
4 network connections to backup server (100baseT)
DEDICATED BACKUP NETWORK

• DLT Library
• HP SureStore DLT Library 20-slot
• With 2 DLT 8000 tape drives

• Backup Server
• HP NetServer LPr
• 2 450-MHz PII processors
• 128 Mbyte RAM
• 2 dual-port 100baseT NICs
• 2 SCSI HBAs

2 SCSI HBAs (one per drive)
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Storage Area NetworkLAN-Less Backup
Storage
Storage

• Geographical coverage of up-to 10km
• High performance (100 Mbytes per second)
• Enables centralised management of storage
• Large expensive storage devices can be
  shared across multiple / all the servers

Tape Library
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Storage Area NetworkServer-Less Backup
Tape Library
Storage
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Storage Area Network - Component
1
SAN
2
3
4
7
Fibre Channel Arbitrated Loop
7
5
- Software component, such as backup software,
device drivers - Hardware components 1)
Adapter/Interface Cards 2) Cables 3)
Media converter (GBIC) 4) Bridges/Routers
5) Hubs 6) Switches/Fabrics 7)
Storage devices, such as Raid, Jukebox,
Tape Library, etc
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6
SAN
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SAN Tape on Switch

• LAN

Up-to 9 servers to be Connected to switch
Use of 16 port switch for SAN for backup only
Two 60 slot 6 DLT 8000 drive libraries, each with
3 SAN connection
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SAN Tape and Disk

• LAN

Each server with dual connection to switch
Disk subsystem with multi-path connection to 2
switches
Tape libraries with cross connection to 2
switches to provide access to all media in event
that one switch is not available
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Backup Software

• Veritas Backup Exec v8.0
• Shared Storage for each server
• One copy of B/E Server or Advanced for each
  server
• Library Expansion option for each additional
  drive in tape library
• Agent Accelerator for other servers not directly
  on SAN
• For NetWare in a mixed environment
• 1 Server SSO and B/E for NW for each NW server
• Computer Associate ARCserveIT
• NT or NetWare
• Enterprise Tape Library Option for each server
• ARCserveIT Advanced/Enterprise Edition for each
  server
• HP OmniBack
• NT, NetWare, Solaris, AIX, SCO OpenServer, HP/UX
• Operating System Support of SAN

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BackupExec SAN - How To

• Ensure Hardware is installed and has been powered
  on in the correct sequence.
• Determine which server participating in the SAN
  will be the database server.
• Install BackupExec NT/2000 Server or Advanced
  Server.

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BackupExec SAN - How To

• Check Shared Storage Option, Tape Device Drivers
  and BackupExec boxes.
• Check any other options that are required.

Note The Autoloader option comes included with
the Shared Storage Option.
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BackupExec SAN - How To

• Configure the Shared Storage Option as the first
  server.
• Configure Tape Device drivers accepting defaults.
• You will then be required to perform a reboot.
• You then need to apply the latest patches
  available. These can be found at
  http//support.veritas.com

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SAN Components, Tips

• HUB
• How many ports are needed?
• Number of servers
• Connections to library (one per every two DLT
  drives)
• Ports for cascading
• Spare port for redundancy
• Cables
• Use Copper cable for up-to 10 meters
• Use Optical cable for longer distances
• Host Bus Adapters
• Check availability of drivers
• Use hard addressing

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Storage Area Network - Benefits

• Improves network performance on LAN and data
  intensive operation
• Allows investment flexibility through a high
  level of scalability.
• High availability and fault tolerance through
  hot plugging, ability to do remote mirroring,
  etc
• Wide geographical coverage, up to 10km node to
  node
• Support multiple existing protocols such as IP,
  SCSI, HIPPI, IPI-3, etc which offer high
  investment protection
• Broad cabling option allows twisted pair cable to
  be used as a more economical alternative to
  fibre cable for short distance (up to 30m)
• SAN is ideal for server-storage clustering
  application
  gt Lower Total Cost of Ownership

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Practical Approach to Implementation

• High Acceptance for automated backup
• (CSR, Toshiba, Lion Nathan, New Hope, Dep of
  Family Community Services, Nomad, AMP, Lucent,
  NetStar, Optus, Telstra, Coffs Harbor Council,
  Museum of Victoria, Hazelwood Power, Defense Dep,
  Bendigo Senior College, Hamb Systems, ANI)
• Veritas, Computer Associates, HPs OmniBack
• End to End Implementation Support
• Test and certification before each implementation
• HW and SW Installation
• Backup set-up and testing
• On-site education
• Ongoing support as necessary