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From Bryan Call <>
Subject Re: ATS - Performance Related Questions - High
Date Fri, 08 Nov 2013 21:12:31 GMT
The performance is *much* better on ATS.  It really depends on your traffic patterns to determine
how much better it will be.  Also, the CPU usage is much lower on ATS.

Some groups use RAID10 for ease of operation, but performance will be less then using the
disk devices directly.

You can email internal mailing lists and I will give you more details.  Don't compile your
own version of ATS and use the packages on dist.


On Nov 8, 2013, at 1:31 AM, Karthick S <> wrote:

> Hi Team,
> I would like to know few performance related information. We have capacity
> planning meeting for setting up a new cluster with AT. So your input will
> be a great value add in our capacity planning.
> Questions:
> 1)  YTS(Yahoo Traffic Server) has some performance optimization which
> utilizes the RAID-10 level for effective cache lookup. Does this ATS also
> holds the similar type of feature which will gel well with RAID 10 level.
> If not we will go ahead with RAID 0 to save more disk space for larger
> cache. Currently we have 300GB cache on each ATS nodes.
> 2)    How does ATS scales with respect to CPU , Memory, Disk? We have our
> current production running with YTS and 16GB ram. Will ATS scale its
> performance If I am getting 24GB ram ? How ATS will scale with respect to
> hardware. Can you please give some insight about it.
> 3) What is the QPS of current ATS?
> PS: Please treat this email as high priority, all your inputs will be
> valuable to me.
> Regards,
> Karthick

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