Thanks to Jason Nash’s article I managed to finally get TRIM enabled for my SSD on my MAC. The procedure works great, however when you have a dual SSD setup like I have (booting on a 120GB Intel and running my VMs on a 256GB Kingston) it doesn’t work as replacing the identifier leaves you with 1 SSD without TRIM [...]
This week I had a call with a new and exciting company called Tintri. Tintri has been flying under the radar for the last couple of years and has worked really hard to develop a new product. Tintri was founded by some of the smartest kids on the block one of which is their current CEO and former EVP of [...]
Today I was fooling around with my new Lab environment when I noticed my Path Selection Policy (PSP) was set to fixed while the array (Clariion CX4-120) most definitely supports Round Robin (RR). I wrote about it in the past(1, 2) but as with vSphere 4.1 the commands slightly changed I figured it wouldn’t hurt to write it down again: [...]
I’ve seen this myth floating around from time to time and as I never publicly wrote about it I figured it was time to write an article to debunk this myth. The question that is often posed is if thin disks will hurt performance due to fragmentation of the blocks allocated on the VMFS volume. I guess we need to [...]
Well depending on what type of queues we are talking about of course, but in general no one likes queues. We are however confronted with queues on a daily basis, especially in compute environments. I was having a discussing with an engineer around storage queues and he sent me the following which I thought was worth sharing as it gives [...]
I was just answering some questions on the VMTN forum when someone asked the following question: Should I upgrade our VMFS luns from 3.21 (some in 3.31) to 3.46 ? What benefits will we get? This person was referred to an article by Frank Brix Pedersen who states the following: Ever since ESX3.0 we have used the VMFS3 filesystem and [...]
Last week I wrote about the different datamovers being used when a Storage vMotion is initiated and the destination VMFS volume has a different blocksize as the source VMFS volume. Not only will it make a difference in terms of reclaiming zero space, but as mentioned it also makes a different in performance. The question that always arises is how [...]
