Timothy Sipples wrote:
Yet another reason for Linux on zSeries is that it can have workload
benefits for z/OS, z/VSE, z/TPF, and z/VM (CMS) applications.
Specifically, Linux on zSeries enjoys Hipersockets (high speed in-memory
connectivity) across LPARs to other mainframe subsystems and applications,
such as DB2 UDB for z/OS. If any of the Linux applications require such
backend services then "proximity" makes a lot of sense. Sometimes you
also get benefits with the more complex multi-server enterprise
applications -- in-memory connections are quite helpful (such as with
EJBs).
[...]
Good point.
That's really good argument pro IFL.
There's also the security aspect. I'm running into many cases where
encryption is now mandatory for any physical network hop, including those
within a datacenter. That's hard to pull off when you've got more than a
couple distributed servers to lash together.
Do they also encipher IQD traffic ? <vbg>
But seriously: there is no reason (*) to encipher traffic within server
room, especially if you can use fiber optic as connection medium.
By definition we consider only machines in one room, otherwise CPC with
IFL couldn't be used instead.
(*) Internal regulation or security policy is *not* a reason in
technical meaning. I mean *why* someone decided to do so. Policy is
consequence of some reasons or just "because I said so".
--
Radoslaw Skorupka
Lodz, Poland
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