One additional point to consider is what happens on a hardware failure.
eg. If you have two NSD servers that are both CES servers and one fails, then
there is a double-failure at exactly the same point in time.
Daniel
Dr Daniel Kidger
IBM Technical Sales
To: gpfsug-discuss@spectrumscale.org
Subject: Re: [gpfsug-discuss] Not recommended, but why not?
Note: External Email
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On 04/05/18 18:30, Bryan Banister wrote:
> You also have to be careful with network utilization… we have some very
> hungry NFS c
Hi All,
I want to thank all of you who took the time to respond to this question … your
thoughts / suggestions are much appreciated.
What I’m taking away from all of this is that it is OK to run CES on NSD
servers as long as you are very careful in how you set things up. This would
include:
On 04/05/18 18:30, Bryan Banister wrote:
You also have to be careful with network utilization… we have some very
hungry NFS clients in our environment and the NFS traffic can actually
DOS other services that need to use the network links. If you configure
GPFS admin/daemon traffic over the
-2469 (T/L: 321-2469)
- Original message -From: "Buterbaugh, Kevin L" <kevin.buterba...@vanderbilt.edu>Sent by: gpfsug-discuss-boun...@spectrumscale.orgTo: gpfsug main discussion list <gpfsug-discuss@spectrumscale.org>Cc:Subject: Re: [gpfsug-discuss] Not recommended, b
[mailto:gpfsug-discuss-boun...@spectrumscale.org] On Behalf Of Sven Oehme
Sent: Friday, May 04, 2018 11:27 AM
To: gpfsug main discussion list <gpfsug-discuss@spectrumscale.org>
Subject: Re: [gpfsug-discuss] Not recommended, but why not?
Note: External
there is nothing wrong with running CES on NSD Servers, in fact if all CES
nodes have access to all LUN's of the filesystem thats the fastest possible
configuration as you eliminate 1 network hop.
the challenge is always to do the proper sizing, so you don't run out of
CPU and memory on the nodes
lt.edu>>
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Subject: [gpfsug-discuss] Not recommended, but why not?
Date:
Our experience is that CES (at least NFS/ganesha) can easily consume all of
the CPU resources on a system. If you're running it on the same hardware as
your NSD services, then you risk delaying native GPFS I/O requests as well.
We haven't found a great way to limit the amount of resources that
<kevin.buterba...@vanderbilt.edu>Sent by: gpfsug-discuss-boun...@spectrumscale.orgTo: gpfsug main discussion list <gpfsug-discuss@spectrumscale.org>Cc:Subject: [gpfsug-discuss] Not recommended, but why not?Date: Fri, May 4, 2018 12:39 PM Hi All,
In doing some research, I have come across
Hi All,
In doing some research, I have come across numerous places (IBM docs,
DeveloperWorks posts, etc.) where it is stated that it is not recommended to
run CES on NSD servers … but I’ve not found any detailed explanation of why not.
I understand that CES, especially if you enable SMB, can
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