RE: Running .Net Natively on IBMi -- MIDRANGE-L

The IFS as a file server is slow.

The IFS as an application server where the files are read and executed on
the platform are as fast as or faster than any other platform.

The difference is the interface used. The CIFS/SMB interface is the
bottleneck in File serving. There is no translation and/or middleware that
gets in the way of PACE execution speeds. Running some very rudimentary
tests between my AIX partition and PACE yields no difference in speed.

--
Jim Oberholtzer
Agile Technology Architects

-----Original Message-----
From: MIDRANGE-L [mailto:midrange-l-bounces@xxxxxxxxxxxx] On Behalf Of john
erps
Sent: Saturday, January 13, 2018 2:56 AM
To: Midrange Systems Technical Discussion <midrange-l@xxxxxxxxxxxx>
Subject: Re: Running .Net Natively on IBMi

I have a question regarding IBM i / PASE and streamfiles.

In my understanding using streamfiles on IBM i / PASE is a great deal less
performant than using streamfiles on other platforms such as Unix.
Because a streamfile on Unix is really a streamfile on disk, and the disk
really stores a HFS.
Instead, the native storage mechanism used on IBM i is completely different
(MI objects, SLS) and the HFS is just a logical presentation.
Therefore e.g. MySQL cannot be used on IBM i for production use because it's
database is implemented using streamfiles.
Instead, the DB2 storage engine must be used for it to have acceptable
performance.

Is this understanding correct?

On Sat, Jan 13, 2018 at 7:06 AM, Richard Schoen <
Richard.Schoen@xxxxxxxxxxxxxxx> wrote:

I'm not really smart enough to know if your definition of native is
better than mine, but with all your technical points I'll give you the

edge.

I just know that Python, PHP, Node and many other things PASE run
smokin fast on the box and are pretty easy to integrate to traditional
RPG and CL workloads as needed.

And I like to integrate so it keeps things fun.

Oh and back to the native .Net running in PASE. If it happens awesome,
but if not I'll use what's native to IBMi when needed and .Net for
everything else.

You might say I'm a universal connector...................

Regards,
Richard Schoen
Director of Document Management
e. richard.schoen@xxxxxxxxxxxxxxx
p. 952.486.6802
w. helpsystems.com
------------------------------

message: 4
date: Fri, 12 Jan 2018 16:20:49 -0700
from: Nathan Andelin <nandelin@xxxxxxxxx>
subject: Re: Running .Net Natively on IBMi

On Fri, Jan 12, 2018 at 3:27 PM, Justin Taylor <JUSTIN@xxxxxxxxxxxxx>
wrote:

IMO, if "x" runs as an active job on IBMi, it's native.

My definition of "native" has additional qualifications. I'll try to
explain why. If you and others do not agree with my perspective, or my
rationale, then that unfortunately leaves us without a common

understanding.

PASE is quite literally a subset of AIX. PASE applications are quite
literally AIX applications:

- PASE doesn't run on top of the technology independent machine interface.
It rather uses a "syscall" interface.
- PASE doesn't utilize single level store.
- PASE objects are little more (if anything) than stream files.
- PASE is an operating environment that is essentially separate from
IBM i.
- PASE runs in Power PC mode rather than Amazon 64-bit mode.
- PASE uses a memory address space that is separate from the one used
by IBM i.
- PASE doesn't run ILE or OPM language programs.
- PASE does run several language environments that don't run on IBM i.

In regard to "active jobs", the ones that bind to PASE typically load
a full-fledged language environment such as Java, Node.js, PHP,
Python, Perl, Ruby. Those Jobs typically have CPU and Memory
requirements that amount to something like 50 times that of an ILE

program.

The IBM i virtual machine may run tens of thousands of Jobs that
activate ILE programs, and manage those workloads without breaking a
sweat. But you can destabilize a machine by launching and running more
than a few hundred PASE jobs.

The way that IBM i manages workloads is a critical distinction from
the way that PASE manages workloads, and also how multi-threaded
language environments like Java manage threads.

To me it doesn't make sense to look at a Job that binds to PASE, and
not make a mental note of the distinctions from ones that run in the

"native"

virtual machine.

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