View
213
Download
0
Tags:
Embed Size (px)
Citation preview
PRESENTED TO THE SUSSEX BRANCH OF THE BRITISH COMPUTER SOCIETY
16TH. APRIL 2008
Wide Area Data ServicesWDS
Shaun Elliott – kisdata limited
Agenda
Overview of Kisdata LtdWide Area Data Services – what it consists of
and why it is important to youQuestions (and hopefully answers!)
Kisdata brings together technology and business consulting skills to design and deliver solutions which work in the real world to bring competitive advantage.
World class standard accreditations with the world’s major vendors & fully
accredited staff, ensure the consistency & quality of our services.
We have been awarded ISO 9001/9002 and are committed to delivering a
high quality service with integrity.
About Kisdata
The CIO’s dilemma: Business performance or more control?
6
Increasing control of data Data Protection – WAN backup and DR Security – SSL encryption Consolidation – eases cost and
management
Increasing distribution of organizations 88% of employees work outside of
headquarters IT must deliver to users guaranteed
performance Branches are expensive and difficult to
manage
Distributed computing problems are converging
11
File Servers
Mail ServersWeb
Servers
FilersTapeBackup
Storage
WAN
File Servers Mail
Servers Filers
TapeBackup
DATA CENTERBRANCH OFFICE
• Application problems Web, e-mail, FTP, Notes, ERP,
database, etc… Slow response times Apps often not used…too slow
• Storage problems Data sprawl Islands of storage Backup & replication Compliance worries
• Networking problems Need “more bandwidth” Latency is a secret throughput killer Important applications not prioritised
12
Application protocol inefficiencies
Transport protocol chattiness
Not enough bandwidth
If you don’t solve all three, users won’t see performance benefits.
The three root causes of poor wide-area application performance
WDS needs to address all key performance issues
13
Bandwidth LimitationsBandwidth Limitations
Transport Chattiness and
Latency
Transport Chattiness and
Latency
• Enables transparent deployment and central management of WDS appliances
• Reduce bandwidth needs• Prioritises applications’ bandwidth use
• Reduce TCP chattiness and latency• Accelerates SSL encrypted traffic
• Reduce application chattiness and latencyApplication Chattiness and
Latency
Application Chattiness and
Latency
Root Cause
Management StreamliningManagement Streamlining
Data Streamlining
Data Streamlining
Transport Streamlining
Transport Streamlining
Application StreamliningApplication
Streamlining
Technology Solution
Latency and Chattiness: Root Causes of Poor Performance
More Than a Bandwidth Problem
14
WAN
DATA CENTER BRANCH OFFICE
LatencyTime required to traverse the network
ChattinessInteractions required to complete an operation or data transfer
WAN
DATA CENTER BRANCH OFFICE
Wide-area Data Services (WDS) is an integrated approach
15
Networking
Overcome bandwidth and latency constraints
Applications
LAN-like WAN performance
Storage
Consolidate and simplify
The WDS underlying framework
16
Initiate new TCP sessions
1. Accelerate the applications that are most important to your business
• Accelerate all TCP-based applications• Prioritize all applications• Orders of magnitude improvements
Maintain TCP sessions
WANDATA CENTER BRANCH OFFICE
Maintain TCP sessions
2. Make it simple to deploy and manage • Transparent deployment• Auto-discovery, auto-interception• No changes to clients, servers, or applications• No tunnels• Robust central management
Data Streamlining provides multiple bandwidth optimisations
17
• Eliminate redundant data on the WAN
• 60 – 95% reduction in bandwidth utilisationData Reduction
Compression
QoS
• LZ-Compression for “new” data segments
• Useful for data transferred on first pass
• (Optional) Prioritize data on bandwidth and latency
• Compatible with existing QoS implementations
Application streamlining overcomes application protocol limitations
18
Typical application inefficiency
Open
FID
Read 1Read 2
WAN
DATA CENTER BRANCH OFFICE
19
Request
Application streamlining overcomes application protocol limitations
WAN
DATA CENTER
BRANCH OFFICE
Optimized WAN Transfer
The net effect is 65-98% reduction in WAN round trips
Appliance completes transaction locally
Appliance completes transaction locally
Application streamlining overcomes application limitations
20
• Windows File Sharing & Windows-based applications
• Microsoft Exchange
• Web-based applications
• Database driven applications
• Disconnected operations & integrated file sharing
CIFS
MAPI
HTTP
MS-SQL
BACKUP & REPLICATION
PROXY FILE SERVICE
• Simplified replication of remote servers
• Unix File Sharing & Unix-based applicationsNFS
• Secure Web applicationsHTTPS
21
WAN
Transport streamlining overcomes TCP limitations
Make TCP payload bigger
16KB to 100KB+
The net effect is a 60-98% reduction in round trips
DATA CENTER
BRANCH OFFICE
Repack payload with references
From 100KB+ to Virtual 1MB+
References
New dataData
Transport streamlining provides many more TCP optimisations
22
• “Fill the pipe” for OC12 and larger connections• Works with clean or lossy links (HS-TCP and MX-TCP)
• Ensure priority handling for packet resends
Advanced TCP Acceleration
Connection pooling
Adaptive congestionwindows
Limited and fastretransmits
• Eliminate 50% of overhead for small, short-lived connections
• Adapt transfer parameters based on network characteristics
• Supports end-to-end acceleration of secure traffic• Maintains the preferred trust modelSSL Acceleration
MX-TCP: Making WAN-based backup, replication, and transfers even faster
Time
Ban
dwid
th /
Thr
ough
put
High-Speed TCP Regular TCPMX-TCP
HS-TCP
• High-Speed TCP avoids slow start, but will still back off in congestion
• Applies to all optimized traffic• HS-TCP available on some WDS
appliances
MX-TCPMX-TCP
• Uses 100% of its allocated bandwidth with no slowdown due to loss• Granular control: Enabled per QoS class• Uses QoS per class bandwidth limits to set sending rate
Works well for lossy environments and satellite WANs too
WDS appliances should be designed for easy network integration
• Wide range of models for data centers down to small offices• Up to 1,000,000 concurrent connections• Up to 4Gbps optimized bandwidth
• Serial clustering• Parallel clustering• Hot backups
• Fail-to-wire Ethernet cards• Multiple power supplies• RAID
Scalability
Software-based Redundancy
Hardware-basedRedundancy
• Numerous 10/100/1000 in-path interfaces• TCP connection forwarding• Diverse in-path and out-of-path deployment options
Deployment Flexibility
26
Secure application acceleration that maintains the preferred trust model
WAN
DATA CENTER
BRANCH OFFICE
1. SSL Certificates and private keys copied to server-side appliance (no certificate faking in branch offices)
2. Appliances use their own identity certificates to establish a secure connection (proactive or on-demand)
3. On secure data request, client handshake with server is intercepted by server-side Appliance. Server-side Appliance SSL connection with origin server.
4. Server-side Appliance establishes SSL connection with client.
5. Temporary session key is migrated from server-side Appliance to client-side Appliance, moving client’s SSL connection to client-side Appliance.
6. Transfers are accelerated via all OS streamlining mechanisms
RequestOptimized WAN transfer over SSL
SSL session setupTemporary Session Key
Secured connection
Legend
Secured connection
TemporarySession Key
SSL Certificate
27
Enhanced Auto-Discovery
Simplifies deployments for complex environments Automatically finds and optimizes between most distant
Appliance pair Eliminates the need for manual peering rules Requires no additional configuration Supports unlimited Appliances in transit between Client
Appliance and Server Appliance
Improves performance finds optimal Appliance pairing for maximum optimization
BRANCH OFFICE
DATA CENTER
WDS vs. application front end (AFE) devices
28
Backup
WAN
DATA CENTERBRANCH OFFICE
Web
FilesEmail
DB
CustomAppsWDS
File, Email, Filer, Web, SMS, etc…
Accelerate all applicationsData reductionTCP optimizationApplication layer optimization
60 – 95% bandwidth savings QoS
DATA CENTER
Application Front End (AFE)
BRANCH OFFICE
Web Server
Web
Web only Single sided (no advanced data reduction) Allows internet & branch connections
WAN
INTERNET USER
HTTPS
29
Infrastructure Cost Savings
Accelerated Business Processes
Bandwidth Savings
More Secure Data
“66% reduction in Exchange servers & the associated cost.”
– Greenhill Investments
“All our architects – around the world – work as if they were in the same office.”
– Gensler Architecture
“$500,000 in MONTHLY bandwidth savings. A payback period of 5 months, even before we factor in productivity gains.”
– LG Electronics
“Our WAN backup windows went from 4 hours to 5 minutes. Protecting a day’s data is worth $200,000 to us.”
– Little Diversified Consulting
Making the business case for WDS in your company
4 Months
Payback Period
1 Month
5 Months
6 Months
Niche Players Visionaries
Completeness of vision
Exinda Networks
Certeon Stampede Technologies
Intelligent Compression Technologies
Silver Peak Systems
Streamcore Systems
Ipanema Technologies
Converged AccessCitrix
Blue Coat systems
F5 Networks
Cisco Systems
Packeteer
Expand Networks
Juniper Networks
Riverbed
Challengers Leaders
Source: Gartner September 2006
Gartner Magic Quadrant – WAN Optimisation Controllers
31
In summary, WDS Appliances will accelerate your business
Reduces bandwidth utilization by 60% to 95%
Accelerates all key applications by up to 100x over the WAN
WAN
Tens of thousands of appliances in production
Enables successful IT consolidation