Cisco WAAS & WAFS –When Network and Storage meet

Ariel Touson, SABynet Data Communications ltd.

:תוכ ן

א תגרים בניהול סביבות מ חשוב מבוזרות ••When Network and Storage meet?

Application Delivery - בנוגע ל Ciscoתפיס תה של חברת ••Cisco WAAS/WAFS – מבנה הפתרון Cisco WAN Application Engine (WAE) -מבט על החומרה •סיכום•

נתונים ואתגרים–ס בי בות מחשוב מבוזרות

ריבוי מערכות עסקיות מבו ס סות מחשוב

צורך בש ירותי מחשוב א תר \מתקדמים ב כל סניף

נתונים ר בים יותר הדורשיםאחסון וגיבוי, טיפול

המשך-נתונים ואתגרים

ריבוי אתרים מקומיים ובינלא ומיים

-אם ב כלל -חלון קטן יותרלתחזוקת המערכות

תחזוקה וניהול, רכישה של מערכות מ חשוב נ פרדות

המשך-נתונים ואתגרים

דרישות גבוהות לשרידות ויכולת המשכיות עסקית

צורך בטכ נולוגיות מתקדמות

DRPפתרונות לשחזור נתונים ,בין אתרים ערים או

,אחסון מרכזיאפילו ארצות פ תרון גיבוי ושחזור

! הכרחי–מר כזי

When Network and Storage meet?

VMWare

Central StorageCentral BackupCentral Management

Branch OfficesData-center

Network Traffics!

The Consolidation Vision

Data Center

Consolidate Resources

Branch

• Consolidation of application and service infrastructure• Centralized management, deployment, and protection• Single, protected copies of data• No compromise to branch user performance

Backup

ApplicationServers

IPNetwork

Tape Drivesand Libraries

Disk Arrays

Client Workstations

PrinterOptimize Access

Core Router ISR

NAS

Applications are designed for LAN environments

High bandwidthLow latencyReliability

WAN characteristics hinder consolidation

Already congestedLow bandwidthLatencyPacket Loss

The WAN Is A Barrier To Consolidation

Round Trip Time (RTT) ~ 0mS

Client

LAN Switch

Server

Round Trip Time (RTT) ~ many many milliseconds

ServerClient

LAN Switch

LAN Switch

Routed Network

WAN - שיפור התעבורה על גבי תשתית ה –הפתרון

LAN-Like Performance

IPNetwork

ClientWorkstation LAN Switch

LAN Switch

Origin FileServerCellera

Edge WAECore WAE

A BFull Preservation of IP and TCP Header Information

Data CenterScalability

Transport and Flow OptimizationsData Redundancy Elimination Accelerates ALL TCP Traffic

Robust ApplicationAdapters to Offload

WAN and Data CenterLocal Services

Firewall Firewall

WAAS Design

WAN Router WAN Router

Cisco WAAS – what’s behind the name:

• Components:Cisco WAAS Transport Flow Optimization (TFO)Cisco WAAS Data Redundancy Elimination (DRE)Persistent Lempel-Ziv (LZ) compressionApplication Traffic Policy (ATP)Cisco Wide Area File Services Software (WAFS)

• Facilitators:Network transparencyExtensible application platformDeployment flexibility and availability

WAN

TFO (Transport Flow Optimization)

Improves Application Performance

Overcomes TCP and WAN bottlenecks by shielding nodes connections from WAN conditionsClients experience fast acknowledgementMinimize perceived packet lossEliminate need to use inefficient congestion handling

LAN TCPBehavior

LAN TCPBehavior

Window ScalingLarge Initial Windows

Congestion MgmtImproved Retransmit

Standard TCP Throughput “Saw-tooth”

Time (RTT)Slow start Congestion avoidance

Packet loss Packet loss Packet loss

cwnd

Packet loss TCP

Return to maximumthroughput could take

a very long time!

WAAS Throughput and Congestion Avoidance

Time (RTT)Slow start Congestion avoidance

Packet lossPacket loss Packet lossPacket loss Packet lossPacket loss

cwnd

Packet lossPacket loss

Adaptive Increase to cwndcwnd = cwnd + f(cwnd, history)

Cwnd decreased by 1/8 on packet loss vs 1/2 with TCP

StandardTCP

StandardTCP

CiscoWAAS TFO

CiscoWAAS TFO

DRE – Data Redundancy Elimination - and LZ

Manage Bandwidth Utilization:

Data Redundancy Elimination (DRE) - provides network traffic caching to eliminate redundancy and compress TCP traffic – up to 100X compression and works across different protocols

LZ compression - provides generic compression for all traffic (even traffic with redundancy removed)

WAN

FILE.DOC

FILE.DOCDRE CACHE DRE CACHE

LZ LZ

IntelligentMessage Suppression

•Protocol proxy to handle non-critical messages•Operation batching and message bundling•Decouple the user experience from the WAN

Data Integrity • Maintain data integrity at all costs• Never compromise security of the data• Guarantee support for all protocol semantics

Data Distributionand Caching

•Validate and serve information locally•Prepopulate via preposition and on-demand•Asynchronous writes to mask large transfers•Transfer only changed segments during writes

Link and ThroughputOptimization

•Compress all messages•Pipeline multiple segments into a common window•Multiplex over many sockets if necessary

Cisco WAFS Optimizations

Network transparency - Seamless Transparent Integration

Seamless integration with the packet network with high availability, load-balancing, and failover

WCCPv2 Policy-Based Routing

Full preservation of L3/L4 packet header information (IP/TCP)

Compliance with network value-added features

Classification - QoS, NBAR, Queuing, Policing, ShapingSecurity - Firewall policies, Access Control ListsReporting - NetFlow, monitoring

Src Mac AAADst Mac BBB

Src IP 1.1.1.10Dst IP 2.2.2.10

Src TCP 15131Dst TCP 80 APP DATA

Src Mac BBBDst Mac AAA

Src IP 1.1.1.10Dst IP 2.2.2.10

Src TCP 15131Dst TCP 80 optimized

Extensible application platform

Application Protocol Typical ImprovementFile Sharing • Windows (CIFS)

• UNIX (NFS)

• Exchange (MAPI)• SMTP/POP3, IMAP• Notes

• HTTP, WebDAV

• FTP

• SMS• Altiris

Database Applications

• SQL• Oracle• Notes

• 2X-20X

Data Protection • Backup Applications• Replication Applications

• 2X-20X

Other • Any TCP-based Application • 2X-20X

Email

• 5X-500X• 2X-100X

• 2X-100X

• 2X-100X

• 2X-100X

Internet and Intranet

Data Transfer

Software Distribution

• 2X-100X

אתגרים מול פתרונות–סיכום

Source Need Technology

Latency• Reduced number of network

roundtrips from chatty application protocols

• Improve application response time on congested links by reducing the amount of data sent across the WAN

• Improve network throughput (total # of data) by reducing TCP-related errors

• Integration into network devices• Compliance with network functions

Local Services • Replacement for services that branch office servers provide

• Centrally managed remote services interface

Bandwidth Utilization

• Intelligent Protocol Proxies

• Application Caching• Data Redundancy Elimination

(DRE)

• Transport Flow Optimizations (TFO)

Link Throughput Limitations

Network Integration

• Router modules, linecards• QoS, NetFlow, Firewalls

Cisco WAE Family – מבט על החומרה

NME-WAE-302

NME-WAE-502

WAE-512

WAE-612

WAE-7326

ACE

RegionalOffice or Small

Data Center

EnterpriseData Center

Branch or RemoteOffice

Perf

orm

ance

Scalability

WAE Appliance Family

The WAE-512 appliance:Single processor, 1 or 2GB of memorySupports up to 20Mbps WAN connections and up to 1500 optimized TCP connectionsSupports 250GB RAID-1 disk capacity

The WAE-612 appliance:Dual-core processor, 2 or 4GB of memorySupports up to 155Mbps WAN connections and up to 6000 optimized TCP connections300GB RAID-1 SAS disk capacity

The WAE-7326 appliance:Dual processor, 4GB of memorySupports up to 310Mbps WAN connections and up to 7500 optimized TCP connections900GB RAID-1 SCSI disk capacity

WAE-512Remote Office Appliance

WAE-612Regional Hub and Data Center Appliance

WAE-7326Enterprise Data Center Appliance

Thank You!Thank You!

Ariel Touson: 052-552 9003Bynet Data Communications