Tag Archives: esxcli

Space Reclamation in vSphere 5.5 with Nimble Storage

Several customers have inquired about space reclamation in vSphere environment – let’s dive into this interesting topic for a bit.

unmap

 

 

 

 

 

 

Why does space reclamation matter?

Reason is fairly straightforward, after a VM gets deleted or storage vMotion from one datastore to another, it’d be a good idea to free up the space on the storage array so they could get used by others.

How does one perform space reclamation and keep track of the status?
Continue reading Space Reclamation in vSphere 5.5 with Nimble Storage

Storage Performance 102 – 100,000 IOPS with 0.1 ms latency?!?! PROVE IT!

No, this post is not about how to get 100,000 IOPS with sub-millisecond latency from your storage solution.  Instead, I will show you some tips on how to make sure your storage vendor lives up to their performance claims.  We had discussed the fundamental concepts of storage performance in the part 1 post, it’s time to dig deeper into storage IO performance monitoring and measurement.  Knowing this will help making sure whatever you end up buying is actually better than the legacy crap you are replacing.  Isn’t that the whole point anyway? :) NOTE: Physical server measurement technique is out of scope for this post – we are only focusing on VMware ESX server in this post.

The million bucks question is —- how do I get a rough idea of how many IOPS my ESX server is running?  And what is the average latency?

Continue reading Storage Performance 102 – 100,000 IOPS with 0.1 ms latency?!?! PROVE IT!