Showing posts from April 27, 2008

How we Understand a Cluster

This is the good one I found on one of the MVP blog:Clustering terms made easy
Clusters are Highly Available and should never be considered Fault Tolerant.Highly Available = is when I come anytime my wife calls me.Fault Tolerant = Marriage.You don't want to be married to you SQL/Exchange Cluster :) You do want it around whenever you need it though.
Active/Active = when your cluster is too busy for its own good.Active/Passive = one worker, one manager, you decide which is which.Node = Clustered computer, could also be the worker who sits in a cube, not to be confused with Dude.Virtual Server = this is kind of like be on a telecom at work, only you are calling in from Hawaii and nobody knows.Quorum = Cluster=Quorum, Quorum=Clustering.Failover = the only time at work that you can fail and still be a hero.Failback = great way to get fired, let your server failover without you controlling it (Don't confuse with the above term).Cluster = when it fails, also known as a Cluster Fork, on…

Script for Windows System Information

Last week for a small project to pull system info from 500 server, I used the following vbs script (found on google search as I not good in writing scripts) to pull WMI info for OS version, SP, Processor, Memory:On Error Resume Next
Const ForReading = 1
Set objFSO = CreateObject("Scripting.FileSystemObject")
Set objTextFile = objFSO.OpenTextFile("c:\computers.txt", ForReading) 'Check the location of the file.
strComputers = objTextFile.ReadAll
arrComputers = Split(strComputers, vbCrLf)
Set objShell = CreateObject("WScript.Shell")
For Each strComputer In arrComputers
strComputer = arrComputers
Set objWMIService = GetObject("winmgmts:" _
& "{impersonationLevel=impersonate}!\\" & strComputer & "\root\cimv2")
Set colSettings = objWMIService.ExecQuery _
("SELECT * FROM Win32_OperatingSystem")
For Each objOperatingSystem in colSettings
Wscript.Echo "OS Name: " & objOperatingSystem.Name

Installed Exchange 2007 today

Yesterday I install Exchange 2007 for a single domain and got an experience to a truly new messaging and colloboration solution. The administration and configuration doesn't match with Exchange 2003. I shall say its really different.
There are lot of features which are new or enahanced to give a better messaging solution.

This enable Mobile, desktop, remote, web, intranet and Internet users to colloborate and share message and emails in a well secure (Forefront securety come with Exchange 2007) manner.

This was a long project initiated by one of my friend where he was not able to configure Exchange 2007. He called me for the help and I pulled out some time to reach him. I found few mistakes which he was doing in configuring SMTP traffic on his router and then creating send and receive rules in Exchange hub transport configuration.

Overall I found it easy and installed and configured the product in less them 2 hrs of time.

Nice experience again with a well built product by Microsoft!!!