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VMware related material

Do you want to backup Exchange on W2008?

I don’t usually get this passionate but recent BS spread by one of our competitors which include straight out lies,  claiming Veeam Backup cannot perform the most simplest of tasks like restoring to an earlier point.

So I wanna fight lies with truths and straight out facts:

  • Their backup product doesn’t have CBT….so sloowwww
  • Their backup product cannot backup Exchange, SQL or AD transaction consistently in a Windows 2008 VM because they piggy back on the VMware tools VSS component. Confirmation found > Here <
  • Their products cannot restore or replicate to ESXi
  • Their products doesn’t have an Enterprise Manager to manage multiple backups servers at the same time.
  • They sell the future – I have seen their roadmap from 2006 and guess what, it’s exactly the same in 2010…nothing changed there then.
  • And so on and so on

Of course that vendor will say: ” we will have all these features soon”

My advice to you is don’t believe everything you read on blogs try it out for yourself… TestDev & POC is always the best advice.


Some years ago me and Mike Laverick talked about creating the ultimate VI admin tool. A VI Client but with the stuff missing. So the ability to perform configuration actions in bulk amongst others.  I decided to resurrect this idea and I was going to call it vCompanion but after reviewing domain registrations I thought it might be a good idea for a name change. I have used the naming convention VPname for other apps so I think I will stick with that – VPCompanion

I’m gonna start by morphing the apps I already have into VPCompanion and then keep adding to it.

If you have any idea’s I will be glad to hear them out.

Replication Bandwidth Calculator


How many times do you get asked “how do I work out if VM Replication will work with my internet link” Well I wanted to demonstrate some way of providing a calculator without working it out in my head every time. So I made a Replication Calculation tool.  It is assumed that you provide it with 3 values:

  1. Average Rate of Change.
  2. The Link speed – this value should reflect the upload speed at the source site or the download speed at the target if this is less. So for example if the upload at the source is 6Mbs and 10Mbs download at the target then go for 6Mbs
  3. Bandwidth % – which is the amount of bandwidth as % which achievable from the link speed specified.


So how do you work out of the “Average Rate of Change” Well if you are using products like Veeam Backup you can monitor a local backup or replication for a period of time which will give you a good indicator of Rate of Change.

If we look at the properties of a completed backup job:


You can monitor the size of the delta’s (.vbr files) and work out the average.


As you can see from this example the average rate of change is 7.63GB or 7813.12MB

So let’s use a scenario as an example:

The line speed is 6Mb/s and we questimate that we will get 70% of the bandwidth…

Next download and install ReplicaCalc from here >  ReplicaCalc (9664 downloads)


If you cannot perform a local backup/replication to ascertain the average rate of change then you could always use the RateOfChange RuleOfThumb or RCRT which states that overtime on average the rate of change will be ~10%. So if your source full snapshots equate to 1TB then the rate of change will 100Gb. Of course this is BS as every user has different results but it’s a good starting point if you have nothing else to reference.

Note this tool only gives you an approximation. Too many factors can change the actual outcome.

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