SSD on Vmware ESXI 4 (TRIM? Good Idea?)

Posted by nextgenneo on Server Fault See other posts from Server Fault or by nextgenneo
Published on 2011-02-05T21:55:05Z Indexed on 2011/02/05 23:27 UTC
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vmware

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vmware-esxi

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ssd

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trim

Hi,

I just posted about finding bottle necks and have narrowed it down to having way too many VMs on my machine on one 15K SAS drive. I have plenty of cores and plenty of ram.

So I am planning on putting 6 VMs on one drive (so 5 drives for 30 VMs). I am thinking of using a 60GB Vertex 2 SSD. Each of my VMs will only need about 6GB of HDD space so this isn't a big deal.

My questions are:

does ESXI support Trim and do I really need it if I leave 25% of the drive as free space? If I need it should I get a diff drive that handles garbage collection differently?
I have a RAID controller w/ write caching. I will still benefit from this? Will this effect my setup differently?
Is there anything I need to consider regarding SSD's in virtualized environments.

Thanks for any and all help!

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