I'd disagree...


On both IBM i and Linnux, MOUNT is used to mount both local and remote file
systems.

Linux mount supports both NFS and SMB as protocols for remote file systems.

IBM i mount supports just NFS. SMB support is provided by the QNTC file
system.

So the difference you saw wasn't IBM i vs Linux mount, but local vs remote.

Charles

On Thu, Aug 4, 2016 at 11:00 AM, Aaron Bartell <aaronbartell@xxxxxxxxx>
wrote:

One more question - are you talking about the IBM i as an NFS client or as
an NFS server?

The IBM i was playing both in my scenario. An NFS definition was created
outside of chroot, and the mount destination/mapping was created inside
chroot. I dug a little into the Linux mount(n1) command and see it doesn't
focus on the 'N' of NFS (specifically, network). That would be my guess
for why NFS is so slow in my scenario. IBM i's NFS would be like Linux
mount+samba.

n1 - http://linux.die.net/man/8/mount

Aaron Bartell
litmis.com - Services for open source on IBM i


On Thu, Aug 4, 2016 at 9:53 AM, Vernon Hamberg <vhamberg@xxxxxxxxxxxxxxx>
wrote:

Aaron

One more question - are you talking about the IBM i as an NFS client or
as
an NFS server?

Thanks
Vern


On 8/4/2016 8:06 AM, Aaron Bartell wrote:

I'd love to expand on it if I was knowledgeable about it, but I am
not. I
only have results of a single scenario that caused it to not work for
our
needs. I'd love to learn that the speed can be addressed, but I don't
have
the time (currently) to dig into it and have instead resorted to less
expensive means (buying disk vs. cpu).

It's entirely possible that IBM's under-the-covers implementation is
similar to Linux and it's simply the IFS being slow (and consuming mass
CPU
in the process) that's the issue.

Aaron Bartell
litmis.com - Services for open source on IBM i


On Thu, Aug 4, 2016 at 8:00 AM, Charles Wilt <charles.wilt@xxxxxxxxx>
wrote:

Aaron,

Care to expand on that? What's different?

I was under the impression that the IBM i's NFS was the same as
Linux/Unix
NFS.

Charles


On Thu, Aug 4, 2016 at 8:48 AM, Aaron Bartell <aaronbartell@xxxxxxxxx>
wrote:

Drawbacks: It's a little more setup. And learning the options of

EXPORTFS and MOUNT is a curve.

One more drawback that caused me to stop using them in significant
fashion... NFS is CPU intensive when used in an IFS I/O heavy scenario
(i.e. mapping Node.js runtime). I don't have a full understanding of
how
NFS works under the covers but suffice to say I learned to not put it
in

a

similar camp of the Linux "mount" command (which is how I was using
it,
right or wrong).

Aaron Bartell
litmis.com - Services for open source on IBM i


On Thu, Aug 4, 2016 at 7:28 AM, Rob Berendt <rob@xxxxxxxxx> wrote:

There are two parts to NFS. The client, and the server.
If you're familiar with QNTC then you are aware that you can do a

WRKLNK

'/QNTC/mypcserver/mypcshare' and look at shares on various PC's. This
would be a client.
You can also create a 'share' using IBM i Navigator that PC's can

access.

This would be a server.
Both QNTC and shares are comparable, but different, than NFS.
There are issues with QNTC that make some people tend to shy away
from

it.

You use EXPORTFS (since EXPORT was already used in binder language)
to
serve up a directory.
You use MOUNT from an IBM i client to consume what some server

exported.

Other open systems, and even old proprietary legacy systems like

Windows,

also support NFS as a client and a server.

Drawbacks: It's a little more setup. And learning the options of
EXPORTFS and MOUNT is a curve.
Pros: It works. Unlike QNTC to a system with numerous shares
defined
that are multiple characters long, with many of the shares having the
first x number of characters identical.

Rob Berendt
--
IBM Certified System Administrator - IBM i 6.1
Group Dekko
Dept 1600
Mail to: 2505 Dekko Drive
Garrett, IN 46738
Ship to: Dock 108
6928N 400E
Kendallville, IN 46755
http://www.dekko.com





From: Darryl Freinkel <dhfreinkel@xxxxxxxxx>
To: Midrange Systems Technical Discussion <
midrange-l@xxxxxxxxxxxx
Date: 08/04/2016 08:07 AM
Subject: Explanation of NFS and other similar features/tools
Sent by: "MIDRANGE-L" <midrange-l-bounces@xxxxxxxxxxxx>



I have always seen these but never had a need to use them or so I

thought.

I do not have a need right now.

What and how are these tools intended to be used?

Reading a current thread on the NFS, I got curious. To date I have

simply

used the IFS root extensively.

TIA

Darryl Freinkel
iPad
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