1. Technology Specialist @ Methos IT
Making your PowerShell scripts X times faster… with logical thinking and PowerShell v3
Jeff Wouters
Technology Methos IT

2. Me, myself and I  http://www.jeffwouters.nl http://www.ngn.nl/hyperv

3. DuPSUG

4. Agenda First: Why PowerShell?
Understanding, avoiding and using the pipeline
PoSH vs. ( WMI / CIM / .NET )
Ifs / Loops
Workflows
(Q & A) ?

6. Understanding the pipeline
Object 1
Object 2
Object 3
Object 4
Object 5
Object 6
Object 7
Object 8
Object 9
Object 10
Object 11
Object 12
Object 13
Object 1
Object 2
Object 3
Object 4
Object 5
Object 6
Object 1
Object 2
Understanding: Get-ChildItem –recurse | Where-Object { $_.Name -like "*Microsoft*" }
Avoiding: Get-ChildItem -filter '*Microsoft*‘ -recurse
Using: Get-ChildItem | Where-Object { $_.Name -like "*Microsoft*“ –and ($_.Length –ge "40") -and ($_.Length -le "60000")}
Using: Get-ChildItem –Filter ‘*Microsoft*’ | Where-Object { ($_.Length –ge "40") -and ($_.Length -le "60000")}

7. Using the pipeline
Filter
Pipeline
Query
The right cmdlet

8. PowerShell vs. (...?...)
CIM
PowerShell
.NET
VBS

9. If / Loop If (statement) {ScriptBlock} Else {
Write-Output “Whatever…” }
If ( statement ) { ScriptBlock }
Elseif ( statement ) { ScriptBlock }
Else { Write-Output “Whatever…” }

11. Switch Switch ( Object ) { { Comparison } { ScriptBlock; break }
Default { Write-Output “Whatever…” }

12. Workflow (v3!)
You know, the cool stuff 

13. Workflow (v3!) Actions Time Configure node 1 2 Configure node 2
Mount / format quorum disk 4
Create cluster 1
Create cluster shared volume
Join cluster node 2
Join cluster node 3
Cluster disk 2 (CSV) 10
Cluster disk 3 (CSV)
Cluster disk 4 (CSV)
TOTAL 44
Actions
Time
Configure nodes 2
Mount / format quorum disk 4
Create cluster 1
Create cluster shared volume
Joing cluster nodes
Mount cluster disks 10
Total 11

14. Questions?