On Fri, Sep 8, 2017 at 8:41 PM, Prentice Bisbal wrote:
> I have a dozen servers that are all identical hardware: SuperMicro servers
> with AMD Opteron 6320 processors. Every since we upgraded to CentOS 6, the
> users have been complaining of wildly inconsistent performance across these
> 12 nodes.
On 14/09/17 03:48, Prentice Bisbal wrote:
> What software configuration, either a kernel a parameter, configuration
> of numad or cpuspeed, or some other setting, could affect this?
Hmm, how about diff'ing "sysctl -a" between the systems too?
Does one load new CPU microcode in whereas another do
On Wed, Sep 13, 2017 at 2:45 PM, Joe Landman wrote:
> FWIW: I gave up on NFS boot a while ago, due in part to problems with
> performance that were hard to track down. The environment I created to do
> completely ramboot boots at scale, allows me to pivot to NFS if desired
> (boot time switch).
FWIW: I gave up on NFS boot a while ago, due in part to problems with
performance that were hard to track down. The environment I created to
do completely ramboot boots at scale, allows me to pivot to NFS if
desired (boot time switch). But I rarely use that. Pure ramboot has
been a joy to w
Are you logging something goes to the disk in the local case, but that is
competing for network bandwidth when NFS mounting?
On Wed, Sep 13, 2017 at 2:15 PM, Scott Atchley
wrote:
> Are you swapping?
>
> On Wed, Sep 13, 2017 at 2:14 PM, Andrew Latham wrote:
>
>> ack, so maybe validate you can re
Are you swapping?
On Wed, Sep 13, 2017 at 2:14 PM, Andrew Latham wrote:
> ack, so maybe validate you can reproduce with another nfs root. Maybe a
> lab setup where a single server is serving nfs root to the node. If you
> could reproduce in that way then it would give some direction. Beyond that
ack, so maybe validate you can reproduce with another nfs root. Maybe a lab
setup where a single server is serving nfs root to the node. If you could
reproduce in that way then it would give some direction. Beyond that it
sounds like an interesting problem.
On Wed, Sep 13, 2017 at 12:48 PM, Prenti
Okay, based on the various responses I've gotten here and on other
lists, I feel I need to clarify things:
This problem only occurs when I'm running our NFSroot based version of
the OS (CentOS 6). When I run the same OS installed on a local disk, I
do not have this problem, using the same exac
I see HPCwire has an article on Julia. I am a big fan of Julia, so
though it worth pointing out.
https://www.hpcwire.com/off-the-wire/julia-joins-petaflop-club/
Though the source of this seems old news - it is a presentation from this
year's JuliaCon
JuliaCon 2018 will be talking place at UCL in
