CloudBridge and Storage Solutions

The killer app

Gopinath Durairaj

Director, Product Management, Citrix Cloud Networking Group

Cedric Courteix

Technical Alliance Manager, NetApp Global Alliances

Citrix + NetApp joint solutions

© 2013 Citrix | Confidential – Do Not Distribute

Data Center

Data Center (Backup)

Storage Replication

• Synchronous Replication limited by latency

• Asynchronous Replication Periodic updates

• NetApp SnapMirror

• Uses multiple connections

• Up to two per volume

• Full volume or incremental replicates

• Typical Replication Options

• Nightly – finish within the assigned window

• Continuous – co-exist with critical flows

Storage

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Replication Performance over WAN

Latency • TCP sender transmits data upto the

window size and waits for Ack

• Round-trip time impacts utilization even

if bandwidth is plenty

Packet Loss • TCP dramatically reduces the window

size when packets get lost

• Slow ramp up back to the original

window size

Standard TCP Behavior

© 2013 Citrix | Confidential – Do Not Distribute

CloudBridge Optimization Technologies

TCP Flow

Control Compression

Protocol

Accelerators QoS

AutoOptimizer™ Engine

Application

Mix

Network

Conditions

Improve

inefficient

protocols

Data

compression /

De-duplication

Overcome

loss/latency

penalties

Prioritize

critical

traffic

© 2013 Citrix | Confidential – Do Not Distribute

TCP Flow Control

Slow Start Slow Ramp

Without CloudBridge

Average

Utilization

Throughput

Time

With CloudBridge

Average

Utilization

Throughput

Time

Link Speed

Tight RPO Less data loss with failures

Adjusts for both latency and packet loss

© 2013 Citrix | Confidential – Do Not Distribute

QoS

NetApp SnapMirror

Bulk Transfers

WAN Application Traffic

Without CloudBridge

60%

20%

20%

Bulk Transfers

Application Traffic NetApp SnapMirror

With Cloudbridge

Application level granularity

Deep classification, prioritization and shaping

Run SnapMirror in shared links

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CloudBridge with SnapMirror

Issue SnapMirror SnapMirror + CloudBridge

Low WAN utilization – due to latency, packet loss

Increase window size to address latency

Optimized window size + congestion behavior to increase WAN utilization

Limited WAN throughput Native compression Offload compression to CloudBridge increased file serving capacity

Shared link with other critical traffic

N/A Preferential treatment for high priority traffic and bandwidth allocation. Enable link sharing, running SnapMirror in background

Test Results

© 2013 Citrix | Confidential – Do Not Distribute

NetApp SnapMirror Testing

NetApp SnapMirror Async

CloudBridge 5000 CloudBridge 5000

NetApp Storage NetApp Storage

Database Server Database Server

DC1 DC2

FAS 3270 FAS 3270

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SnapMirror Replication times

Greater benefits under high latency or lossy WAN conditions

Using 50ms RTT WAN latency and 0.01% loss

Results depend on WAN condition and data compressibility

119

578

52 59

0

100

200

300

400

500

600

700

0% Loss 0.01% Loss

Re

plic

atio

n t

ime

, Se

con

ds

Baseline Optimized

1180

376

95 37

0

200

400

600

800

1000

1200

1400

No de-dup De-dup

Re

plic

atio

n t

ime

, Se

con

ds

Baseline Optimized

© 2013 Citrix | Confidential – Do Not Distribute

References

Citrix Sales Knowledge Base Joint Citrix and NetApp White paper http://www.citrix.com/skb/articles/RDY9621 Deployment Guide http://www.citrix.com/skb/articles/RDY9506

NetApp Technical Report SnapMirror Async Overview and Best Practices Guide www.netapp.com/us/library/technical-reports/tr-3446.html

Work better. Live better. Work better. Live better.