Post on 07-Mar-2018
transcript
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
• 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