Cisco WAAS & WAFS When Network and Storage meet. Ariel Touson, SA Bynet Data Communications ltd.

Transcription

1 Cisco WAAS & WAFS When Network and Storage meet Ariel Touson, SA Bynet Data Communications ltd.

2 תוכ ן: א תגרים בניהול סביבות מ חשוב מבוזרות When Network and Storage meet? תפיסתה של חברת Cisco בנוגע ל - Delivery Application Cisco WAAS/WAFS מבנה הפתרון מבט על החומרה - (WAE) Cisco WAN Application Engine סיכום

3 ס בי בות מחשוב מבוזרות נתונים ואתגרים ריבוי מערכות עסקיות מבו ס סות מחשוב צורך בש ירותי מחשוב מתקדמים ב כל סניף\א תר נתונים ר בים יותר הדורשים טיפול, אחסון וגיבוי

4 נתונים ואתגרים - המשך ריבוי אתרים מקומיים ובינלא ומיים חלון קטן יותר - אם בכלל - לתחזוקת המערכות רכישה, תחזוקה וניהול של מערכות מ חשוב נ פרדות

5 נתונים ואתגרים - המשך דרישות גבוהות לשרידות ויכולת המשכיות עסקית צורך בטכ נולוגיות מתקדמות לשחזור נתונים פתרונות DRP בין אתרים, ערים או אפילו ארצות אחסון מרכזי, פ תרון גיבוי ושחזור מר כזי הכרחי!

6 When Network and Storage meet? Branch Offices Data-center VMWare Central Storage Central Backup Central Management Network Traffics!

7 The Consolidation Vision Consolidation of application and service infrastructure Centralized management, deployment, and protection Single, protected copies of data No compromise to branch user performance Tape Drives and Libraries Backup Consolidate Resources Client Workstations NAS Disk Arrays Application Servers Core Router IP Network ISR Optimize Access Printer Data Center Branch

8 The WAN Is A Barrier To Consolidation Applications are designed for LAN environments High bandwidth Low latency Reliability WAN characteristics hinder consolidation Already congested Low bandwidth Latency Packet Loss Client Round Trip Time (RTT) ~ 0mS Client LAN Switch Server Round Trip Time (RTT) ~ many many milliseconds LAN Switch Routed Network LAN Switch Server

9 הפתרון שיפור התעבורה על גבי תשתית ה - WAN LAN-Like Performance

10 WAAS Design A Full Preservation of IP and TCP Header Information B Client Workstation LAN Switch Firewall WAN Router IP Network WAN Router Firewall LAN Switch Origin File Server Cellera Edge WAE Core WAE Robust Application Adapters to Offload WAN and Data Center Local Services Transport and Flow Optimizations Data Redundancy Elimination Accelerates ALL TCP Traffic Data Center Scalability

11 Cisco WAAS what s behind the name: Components: Cisco WAAS Transport Flow Optimization (TFO) Cisco WAAS Data Redundancy Elimination (DRE) Persistent Lempel-Ziv (LZ) compression Application Traffic Policy (ATP) Cisco Wide Area File Services Software (WAFS) Facilitators: Network transparency Extensible application platform Deployment flexibility and availability

12 TFO (Transport Flow Optimization) Improves Application Performance Overcomes TCP and WAN bottlenecks by shielding nodes connections from WAN conditions Clients experience fast acknowledgement Minimize perceived packet loss Eliminate need to use inefficient congestion handling WAN LAN TCP Behavior Window Scaling Large Initial Windows Congestion Mgmt Improved Retransmit LAN TCP Behavior

13 Standard TCP Throughput Saw-tooth Return to maximum throughput could take a very long time! cwnd Packet loss Packet loss Packet loss Packet loss TCP Slow start Congestion avoidance Time (RTT)

14 WAAS Throughput and Congestion Avoidance Adaptive Increase to cwnd cwnd = cwnd + f(cwnd, history) Cwnd decreased by 1/8 on packet loss vs 1/2 with TCP Packet Packet loss loss Packet Packet loss loss Packet Packet loss loss Packet Packet loss loss cwnd Cisco Cisco WAAS WAAS TFO TFO Slow start Congestion avoidance Time (RTT) Standard Standard TCP TCP

15 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) FILE.DOC WAN DRE CACHE DRE CACHE FILE.DOC LZ LZ

16 Cisco WAFS Optimizations Intelligent Message Suppression Data Distribution and Caching Link and Throughput Optimization Data Integrity Protocol proxy to handle non-critical messages Operation batching and message bundling Decouple the user experience from the WAN Validate and serve information locally Prepopulate via preposition and on-demand Asynchronous writes to mask large transfers Transfer only changed segments during writes Compress all messages Pipeline multiple segments into a common window Multiplex over many sockets if necessary Maintain data integrity at all costs Never compromise security of the data Guarantee support for all protocol semantics

17 Network transparency - Seamless Transparent Integration Seamless integration with the packet network with high availability, loadbalancing, 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, Shaping Security - Firewall policies, Access Control Lists Reporting - NetFlow, monitoring Src Mac AAA Dst Mac BBB Src IP Dst IP Src TCP Dst TCP 80 APP DATA Src Mac BBB Dst Mac AAA Src IP Dst IP Src TCP Dst TCP 80 optimized

18 Extensible application platform Application Protocol Typical Improvement File Sharing Windows (CIFS) Internet and Intranet Data Transfer Software Distribution Database Applications UNIX (NFS) Exchange (MAPI) SMTP/POP3, IMAP Notes HTTP, WebDAV FTP SMS Altiris SQL Oracle Notes Data Protection Backup Applications Replication Applications 5X-500X 2X-100X 2X-100X 2X-100X 2X-100X 2X-100X 2X-20X 2X-20X Other Any TCP-based Application 2X-20X

19 סיכום אתגרים מול פתרונות Source Need Technology Latency Reduced number of network roundtrips from chatty application protocols Intelligent Protocol Proxies Bandwidth Utilization Improve application response time on congested links by reducing the amount of data sent across the WAN Application Caching Data Redundancy Elimination (DRE) Link Throughput Limitations Improve network throughput (total # of data) by reducing TCP-related errors Transport Flow Optimizations (TFO) Network Integration Integration into network devices Compliance with network functions Router modules, linecards QoS, NetFlow, Firewalls Local Services Replacement for services that branch office servers provide Centrally managed remote services interface

20 מבט על החומרה Family Cisco WAE Enterprise Data Center ACE Performance Regional Office or Small Data Center WAE-612 WAE-7326 Branch or Remote Office WAE-512 NME-WAE-302 NME-WAE-502 Scalability

21 WAE Appliance Family WAE-512 Remote Office Appliance WAE-612 Regional Hub and Data Center Appliance The WAE-512 appliance: Single processor, 1 or 2GB of memory Supports up to 20Mbps WAN connections and up to 1500 optimized TCP connections Supports 250GB RAID-1 disk capacity The WAE-612 appliance: Dual-core processor, 2 or 4GB of memory Supports up to 155Mbps WAN connections and up to 6000 optimized TCP connections 300GB RAID-1 SAS disk capacity The WAE-7326 appliance: Dual processor, 4GB of memory Supports up to 310Mbps WAN connections and up to 7500 optimized TCP connections 900GB RAID-1 SCSI disk capacity WAE-7326 Enterprise Data Center Appliance

22 Thank You! Ariel Touson: Bynet Data Communications