Sessions about to start – Get your rig on!

Monitor Virtualisation in System Centre5 things you must knowBen Adamson@BWAdamson

DCI308

“The task of the right eye is to peer into the telescope, while the left eye peers into the microscope.”

• Leonora Carrington

Session Objectives

• Understand useful metrics• Get the best from System Center• Other tips

Agenda

Options for virtualisation monitoring

Why use System Centre?

Context

Key metrics

Trending and Analysis

Capacity Planning

Knowledge/Automation

5

Monitoring options

• vCenter• Agent in the VM• SNMP• Syslog• VMware Web Service SDK (API)

• VMM • Agent in the VM • SNMP • Local tools • Task manager – Perf Counters -

Logman

• SCOM

VMware Hyper-V

System Center Operations Manager

Management Packs inject intelligence

Single Tool for Centralized Monitoring• Monitor with the

entire stack in mind• Key Benefits• Single View Across Platforms• Available Knowledge Base• Monitoring End-to-End• Determining Root Cause

Free Stuff

top5

Do something to join the dots#1

5 key concepts for monitoring virtualization1. You need a map• Track relationships & dependencies

2. Visualize as you virtualize• Dashboards & Reports. Context is key

3. Everybody has to share • Understand resource sharing and over-commitment

4. Look to the future• Use forecasting, trending, modelling

5. Knowledge is power• KB guidance is essential for lower time-to-resolution

Key events: Availability and configuration• Availability and Status • VMs

• Hosts• Storage • Network• Hardware

Demo

Maps in System Center

Visualize Key Metrics#2

Image Source: http://www.humcaff.org

5 Key concepts for monitoring virtualization1. You need a map

• Track relationships & dependencies

2. Visualize as you virtualize• Dashboards & Reports. Context is key

3. Everybody has to share • Understand resource sharing and over-commitment

4. Look to the future• Use forecasting, trending, modelling

5. Knowledge is power• KB guidance is essential for lower time-to-resolution

Demo

Visualisation in SCOM

Monitoring Hyper-V CPU Performance

• Measure guest operating system processor utilization [Hyper-V Hypervisor Logical Processor(_Total)\% Total Run Time] [\Hyper-V Hypervisor Virtual Processor(*)\%Guest Run Time]

• Less than 60% consumed = Healthy• 60% - 89% consumed = Monitor or Caution• 90% - 100% consumed = Critical, performance will be adversely affected

Task Manager?

Root Partition Child Partition Child Partition

HypervisorDevices Processors Memory

Server

IO stac

k

VSCs

VMbus

Child Partition

Server

IO stac

k

VSCs

VMbus

IO stac

k

Drivers

VSPs

VMbus

Why monitoring Host CPU counters are inaccurate?

Shared memory

Hyper-V Task Manager

Demo

Free Tool

Wee tip – CPU HotAdd in Hyper-V

%

Magical CPU HotAdd

Using reservations and limitsDemo

Monitoring Network Performance / Capacity• Test Network Latency – Ping• Test Packet Loss – pathping• Test Network File Transfers – Copy• Network Utilization Monitoring: \Network Interface(*)\Bytes

Total/sec• Less than 40% = Healthy

• 41%-64% = Monitor or Caution

• 65-100% = Critical, performance will be adversely affected

• Bottlenecks: \Network Interface(*)\Output Queue Length • 0 = Healthy

• 1-2 = Monitor or Caution

• Greater than 2 = Critical, performance will be adversely affected.

• MTU settings must be the same for ALL

Demo

Pathping Task

Memory monitoring• Dynamic memory• Aim high and hit low

• Numa vs Dynamic Memory

• Memory Balloon, <50% • Can cause high disk I/O in-VM due to

paging • Memory Swapping, = 0!

• Swapfile use is last resort for the Host

Key metrics : Storage• Storage space • Disk Pressure is a factor!

• Minimum free space >100 MB• At this point VM corruption will occur

• Track ‘garbage/unknown’ files• Also track Snapshots/Checkpoints• Relate VMs to Storage

Key metrics : Storage• Storage space• Storage Latency

• Kernel Latency within Host ~0ms• Device Latency on backend <20ms• Find the hotspots of high I/O

• Relate VMs to Datastores

StorageReporting

Demo

Wee Bonus Tip –

Rebrand reports

Everyone shares the hot-tub

#3

Image Source: http://www.moviebreak.de/

5 Key concepts for monitoring virtualization1. You need a map

• Track relationships & dependencies

2. Visualize as you virtualize• Dashboards & Reports. Context is key

3. Everybody has to share • Understand resource sharing and over-commitment

4. Look to the future• Use forecasting, trending, modelling

5. Knowledge is power• KB guidance is essential for lower time-to-resolution

Key metrics : Over-commitment

• CPU Pressure • # of running VM vCPU per Host Core• High ratio can impact vSphere CPU Scheduler• Absolute maximum = 25• Best practice 4 - 8

Key metrics : Over-commitment

• CPU Pressure• Memory Pressure

• Memory allocated versus physical RAM available• vSphere shares very efficiently (TPS) – but:• High values can cause ballooning, or even swapping

Key metrics : Over-commitment

• CPU Pressure• Memory Pressure• Disk Pressure

• Disk space allocated versus capacity• No real performance impact – but:• If VMs start to use their allocation – physical capacity can fill quickly

Demo

Hot Tub

A crystal-ball is awfully handy#4

Image Source: http://www.memecenter.com

5 Key concepts for monitoring virtualization1. You need a map

• Track relationships & dependencies

2. Visualize as you virtualize• Dashboards & Reports. Context is key

3. Everybody has to share • Understand resource sharing and over-commitment

4. Look to the future• Use forecasting, trending, modelling

5. Knowledge is power• KB guidance is essential for lower time-to-resolution

Key Factors• Pressure metrics• Capacity• Alert trending• ‘What if’ and ‘where’?

Demo

Capacity planning and forecasting

Knowledgeis Power#5

Image Source: http://yuegroup.ust.hk

5 Key concepts for monitoring virtualization1. You need a map

• Track relationships & dependencies

2. Visualize as you virtualize• Dashboards & Reports. Context is key

3. Everybody has to share • Understand resource sharing and over-commitment

4. Look to the future• Use forecasting, trending, modelling

5. Knowledge is power• KB guidance is essential for lower time-to-resolution

Knowledge is power

• SCOM kb guidance is vital• Mean-time-to-resolution• Proactive automated management

Demo

Knowledge Base

Wee Bonus Tip

VMware Orchestration

Q&A

5

Veeam Management Pack for System Center

veeam.com/mp

Learning

Microsoft Certification & Training Resources

www.microsoft.com/learning

TechNet

Resources

Sessions on Demand

http://channel9.msdn.com/Events/TechEd

Resources for IT Professionals

http://microsoft.com/technet

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