Virtualisation: Th The need to know whats going on d t k h t i - - PDF document

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Virtualisation: Th The need to know whats going on d t k h t i - - PDF document

Jun 26, 2023 152 likes •340 views

4/13/2011 Virtualisation: Th The need to know whats going on d t k h t i Tim Chaffe, Enterprise Architecture EDUCAUSE 2011 The Future is Cloudy IT Services IT Services 1 4/13/2011 End users are interested in Functionality P f

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Virtualisation: Th d t k h t’ i The need to know what’s going on

Tim Chaffe, Enterprise Architecture EDUCAUSE 2011

The Future is Cloudy

IT Services IT Services

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4/13/2011 2

End users are interested in

Functionality P f Performance

Performance = Latency

ΔT= the time it takes the entire page to get back

IT Service IT Service

ΔT

the entire page to get back

Cloud Cloud

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What is the ideal ΔT ?

4 sec 10 sec 1 sec

ΔT Participants

Virtualised Datacentre

Storage Compute Application Services Network Services

Campus Network

Client

Internet Wireles s

PC Mac iPhone

Mobile Network Wired

iPad Android TV

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Virtual on Latency ? Measuring ΔT ?

Packet I Packet E Client Server

Load Balancer

Probe Ingres Egress

A l /

Probe

Analyzer/ BI Engine

SQL

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For the Technical folk

Source: Vantage Admin Guide

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Business Benefits

  • We can talk to users about performance
  • We can talk to users about performance

problems

  • We can establish baselines for application

performance for ALL web pages

  • We can identify where applications have

problems

  • We can measure SLA’s against user groups
  • Load Testing is reliable and repeatable

Exam ples

  • User Experience Monitoring
  • User Experience Monitoring
  • Assistance with Development processes
  • Problem Resolution
  • We can show we have made things better
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USER EXPERI ENCE MONI TORI NG

User Experience Monitoring

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User Experience Monitoring Service Level Monitoring

SLA = 80% of content delivered in 2-4 seconds

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BASELI NI NG

Norm ality

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Netw ork - Regions Netw ork - I nternet

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PROBLEM SOLVI NG 1

Google Mini’s running slow

Before Tuning One Legged Dog After Tuning

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Google Mini - Baseline

Before Tuning After Tuning

PROBLEM SOLVI NG 2

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Debugging a realtime event At 4:00 we had a slow down on the main university web site u ve s ty web s te Digging deeper there seems to be problems with redirects Correlation

There’s a peak of requests against one of h k l h i i the network elements. But what is causing them?

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User Activity

Load Test 1 & 2 are pretty active

LoadTesting minor indiscretion

~1m hits against the pre-prod Campus Solutions 1 million hits against the pre-prod Campus Solutions in a day

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PROBLEM SOLVI NG 3

Packet loss – Why ?

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Packet Loss – Why ? UniSat Access – TV Programming

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Summary

  • Virtualization means that applications share resources
  • Virtualization means that applications share resources
  • One change affects everybody
  • Application Performance Monitoring lets you know what

your customer is experiencing in terms of latency

  • Application Performance Monitoring lets you make

performance changes with confidence

  • And if something is going wrong you stand a chance of

being able to find out why

Trust But Verify !

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