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 Post subject: SSD Disk Requirement for Adaptive Optimize
PostPosted: Wed Sep 06, 2017 9:28 pm 

Joined: Thu Nov 20, 2014 1:36 am
Posts: 4
Hi all,
i'm new on 3PAR, and i have a 3PAR 8200 with 10TB RAW, and i want to buy SSD to configure AO for my 3PAR,
pls suggest me minimum requirement SSD disk for configure AO on 3PAR.

Thanks & Best Regards,


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 Post subject: Re: SSD Disk Requirement for Adaptive Optimize
PostPosted: Thu Sep 07, 2017 5:34 am 

Joined: Wed Nov 19, 2014 5:14 am
Posts: 451
For a net new SSD tier supporting AO or volumes the minimum would be 6 x 400GB, optimal would be 8 x 400GB disks.

Although from a performance perspective if you only have 10TB raw in SAS you might be as well building the existing tier out, otherwise you'll have a very large performance imbalance between the two tiers.

Since it's a relatively small configuration you could also consider using fewer SSD's (2) and Adaptive Flash Cache and use some of the remaining budget to add to the SAS tier, that way you can always build the SSD tier out in the future to support AO as required.

You can also combine the two approaches AO and AFC but you'd need to deploy the larger of the two minimum (AO minimum).

Take a look at this it will help with AO and AFC. https://www.hpe.com/h20195/v2/getpdf.aspx/4AA5-5731ENW.pdf?ver=3.0


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 Post subject: Re: SSD Disk Requirement for Adaptive Optimize
PostPosted: Fri Nov 10, 2017 8:41 am 

Joined: Thu Oct 26, 2017 1:21 am
Posts: 16
I have a similar configuration. would it make any changes in performance to use adaptive optimization, considering that we have only FC disks?


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 Post subject: Re: SSD Disk Requirement for Adaptive Optimize
PostPosted: Mon Nov 13, 2017 7:38 am 
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Joined: Tue Oct 07, 2014 8:34 am
Posts: 124
Yes it will have a big Impact on Performance.
With around 10% SSD capacity, normaly you will have 80% of IOPS with SSD Speed.

If my Customers add SDD Tiering, they lower Response Time by 8 - 10x.
(It depends, on many factors)
But it have nearly no Impact for Backup, for this an AFA is better.

Flash Cache is good for Multiple Read (Databases) and no Write.


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