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Re: Paid support for DSS?

There was a recent comparison test of current Linux kernel
versus current OS X on the same Apple hardware. OS X came out
very poorly as the load increased (several factors worth). Problem seems to be the OS X kernel is not well designed re
granularity of kernel locks so a heavily threaded (i.e. web/db
app with lots of users beating on it) situation beats OS X up,
at least in comparison w/ Linux. Current OS X improves the
multitasking ability of OS X over Panther, but still cannot begin
to compete with Linux kernel.

I may have seen a variation of this in that a 450 mhz Pentium III
laptop running Windows 2K Pro can display an embedded QuickTime
movie in a Firefox frame while my 1ghz eMac struggles to do the
same with Panther failing and Tiger just barely managing it.
That surprised me because the cpu design in the eMac is supposed
to provide more crunch per cycle than the old Pentium, so I
would have expected the 1ghz eMac to be 3 times faster (or more)
than my old Pentium III laptop, instead of struggling to match it.

Odd side note is that Safari and IE both fail to handle the mix
of embedded QuickTime in a frame and I have to give them a
super simple web page for the embedded QT player otherwise
they both break.  While Firefox didn't seem to have a problem.




Not yet, and I'm very curious about this too.  (It's not that I /don't/ want
to use Apple hardware, but I have to do due diligence.)

I've found firms that offer load testing services, but I haven't found any
tools that I can use myself.

-- Charles


-----Original Message-----
From: streaming-server-users-bounces+lists06=email@hidden
[mailto:streaming-server-users-bounces+lists06=email@hidden]
On Behalf Of email@hidden
Sent: Thursday, December 22, 2005 4:37 AM
To: email@hidden
Subject: Re: Paid support for DSS?

Charles,

Have you done any actual comparison testing on the hardware end?  If so,
I'd be curious to know the relative performance of a dual 2.3ghz XServe
w/QTSS for streaming when compared to a recent vintage dual processor
Xeon/Opteron blade server running Linux + DSS.  I am in much the same boat
as you are.  The Xserves are tempting because of the "it just works out
of the box" aspect, the relative ease of maintenance with applecare.
However, recent articles I've seen haven't been very encouraging with
OSX's scalability on heavily loaded servers.  Also, 1RU dual Xeon/Opteron
hardware solutions are so much cheaper in comparison.  Times umpteen
servers, it really starts to add up.




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