Re: [Beowulf] [EXTERNAL] server lift

2021-10-21 Thread Prentice Bisbal via Beowulf 

Make that +2 for the manual lift.

Prentice

On 10/20/21 4:48 AM, Tina Friedrich wrote:

+1 for the manual

We had an electric scissor lift in the DC, and exactly that happened - 
battery died. More expensive to replace than buying a new lift.


So we got a manual one (making sure it can go to full rack height 
which is very useful) - much less likely to go wrong.


Tina

On 19/10/2021 18:40, Robert Taylor wrote:
I like the serverlift, having used one in our colo. If I got one, I 
would go with the crank one. Electric is nice, but when the battery 
is dead, you're stuck. Maybe it would have run off of wall power, but 
our colo space is all 208v so I couldn't be sure if I could plug it 
in there. Don't want to let out the blue smoke :-)




On Tue, Oct 19, 2021 at 12:47 PM Michael Di Domenico 
mailto:mdidomeni...@gmail.com>> wrote:


    i would love to go oil bath, it's just not in the cards for this
    data center

    On Tue, Oct 19, 2021 at 2:34 AM Stu Midgley mailto:sdm...@gmail.com>> wrote:

    we use a gantry crane...

 From our install in 2019 :)

    image.png

    On Tue, Oct 19, 2021 at 9:34 AM Lux, Jim (US 7140) via Beowulf
    mailto:beowulf@beowulf.org>> wrote:

    Do you want one with a scissor lift type arrangement, or
    with a "prongs" arrangement (more like a forklift)

    For instance, the scissor types have a nice flat surface
    that remains level, so you can slide stuff off a table onto
    the lift, or from the lift onto a table. But you don't have
    access "under" the platform.


    On 10/18/21, 7:33 AM, "Beowulf on behalf of Michael Di
    Domenico" mailto:beowulf-boun...@beowulf.org> on behalf of
    mdidomeni...@gmail.com > 
wrote:


     we're using an older genie lift as a server lift
    currently.  which as
     you can guess isn't designed for servers.  the most
    recent set of
     compute nodes we purchased are pretty much impossible
    to lift by man
     (even if that was a good idea) and the genie lift is
    getting awkward
     in our cramped data center given it's design and server
    weight.

     i can certainly google for one, but they all look great
    in the
     glossies.  does anyone want to provide some real world
    info?
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    --     Dr Stuart Midgley
    sdm...@gmail.com 

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Re: [Beowulf] [EXTERNAL] server lift

2021-10-21 Thread Prentice Bisbal via Beowulf 

We have one of these where I work:

https://serverlift.com/data-center-lifts/sl-350x/

I've never actually used it to install a server yet, but I have run it 
through its paces doing "dry runs" out of boredom, and I'd say it's 
nicer than any other server lift I've used.


Prentice

On 10/19/21 7:40 AM, Michael Di Domenico wrote:

On Mon, Oct 18, 2021 at 9:33 PM Lux, Jim (US 7140)
 wrote:

Do you want one with a scissor lift type arrangement, or with a "prongs" 
arrangement (more like a forklift)

we have one with the prongs now, that's one of the biggest issues.
trying to slide an unlevel server, that's very heavy, onto rails in
the rack is difficult.  and with the width of the isle and the counter
weight on the lift, trying to lift the low side of the server slightly
involves and act of yoga by a superhero

i was looking at ones from serverlift, they seem to have a flat
platform and side hoist rather then a rear hoist.  seems like a good
design, but before i buy something i'd like to get some unbiased
opinions on it or others like it.
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Re: [Beowulf] server lift

2021-10-21 Thread Michael Di Domenico 
On Wed, Oct 20, 2021 at 8:03 PM David Mathog  wrote:
> If the prongs are level couldn't you attach a shelf of sorts to it?

they aren't that's part of the problem.
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Re: [Beowulf] [EXTERNAL] server lift

2021-10-21 Thread Tina Friedrich 

Well if we are name dropping - ours is this one

https://www.manutan.co.uk/en/key/mobile-double-scissor-lift-table-150kg-to-500kg

in the 500kg going up to 1605mm.

The short edge of the platform fits the front of a rack really well, so 
one can slide things in and out of racks onto the lift table easily.


And yes - sturdy, doubles up as a trolley and/or work table. And not 
electric so no battery to fail.


Tina

On 20/10/2021 21:35, Will Powell wrote:
We have a number of "Strongway 2-Speed Hydraulic Rapid Lift XT Table 
1000-Lb" carts, which are the scissor lift type.


They're sturdy. They double as simple moving carts (hauling a stack of 
servers to surplus) or frequently used as a small, mobile work table 
wherever needed within the datacenter. They were within our budget, too.


They don't extend high enough on their own to install something at the 
very top of a rack but all we usually shim something (empty shipping 
boxes?) to get the right height, if needed.


Will Powell
Research Technologist // Georgia Tech // School of Computational Science 
and Engineering


On 10/19/21 7:40 AM, Michael Di Domenico wrote:

On Mon, Oct 18, 2021 at 9:33 PM Lux, Jim (US 7140)
 wrote:
Do you want one with a scissor lift type arrangement, or with a 
"prongs" arrangement (more like a forklift)

we have one with the prongs now, that's one of the biggest issues.
trying to slide an unlevel server, that's very heavy, onto rails in
the rack is difficult.  and with the width of the isle and the counter
weight on the lift, trying to lift the low side of the server slightly
involves and act of yoga by a superhero

i was looking at ones from serverlift, they seem to have a flat
platform and side hoist rather then a rear hoist.  seems like a good
design, but before i buy something i'd like to get some unbiased
opinions on it or others like it.
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--
Tina Friedrich, Advanced Research Computing Snr HPC Systems Administrator

Research Computing and Support Services
IT Services, University of Oxford
http://www.arc.ox.ac.uk http://www.it.ox.ac.uk
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Re: [Beowulf] Infiniband for MPI computations setup guide

2021-10-21 Thread christophe Pera 
Oups absolutely sorry for this error. not yet correctly awake ... Best 
regards.


Le 21/10/2021 à 09:04, christophe Pera a écrit :


salut emmanuel

ok pour mecredi.

Je vais verifier vendredi matin le materiel et te faire une liste 
détaillée. je dois relever les numeros de serie aussi avant que tu les 
recuperes


pour changer leur destination/localisation ou les sortir de 
l'inventaire (ce serait plus simple). Je vais en discuter avec notre 
gestionnaire.


Le 20/10/2021 à 18:21, Paul Edmon via Beowulf a écrit :


Oh you will also need a IB subnet manager (opensm) running since you 
have an unmanaged switch.  You can start this on one of the compute 
nodes.   I would probably start up 2 so you have redundancy.


-Paul Edmon-

On 10/20/2021 6:08 AM, leo camilo wrote:
 I have recently acquired a few ConnectX-3 cards and an unmanaged IB 
switch (IS5022) to upgrade my department's beowulf cluster.


Thus far, I have been able to verify that the cards and switch work 
via the MFT and opensource tools in ubuntu,


Though, I was wondering if anyone knew of any guide or resources for 
setting up a cluster for MPI based computations in a linux/debian 
environment? Some guides about how to make it work with SLURM would 
also be appreciated.


Thanks in advance for any suggestions, I am often a user of 
clusters, but it is my first time setting one up.


Cheers,

Leonardo

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Université Claude Bernard Lyon 1
Departement de Mécanique
Bat Omega 721 - 2ème étage
43 Boulevard du 11 Novembre 1918
69622 Villeurbanne CEDEX
http://p2chpd.univ-lyon1.fr/
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Re: [Beowulf] Infiniband for MPI computations setup guide

2021-10-21 Thread christophe Pera 

salut emmanuel

ok pour mecredi.

Je vais verifier vendredi matin le materiel et te faire une liste 
détaillée. je dois relever les numeros de serie aussi avant que tu les 
recuperes


pour changer leur destination/localisation ou les sortir de l'inventaire 
(ce serait plus simple). Je vais en discuter avec notre gestionnaire.


Le 20/10/2021 à 18:21, Paul Edmon via Beowulf a écrit :


Oh you will also need a IB subnet manager (opensm) running since you 
have an unmanaged switch.  You can start this on one of the compute 
nodes.   I would probably start up 2 so you have redundancy.


-Paul Edmon-

On 10/20/2021 6:08 AM, leo camilo wrote:
 I have recently acquired a few ConnectX-3 cards and an unmanaged IB 
switch (IS5022) to upgrade my department's beowulf cluster.


Thus far, I have been able to verify that the cards and switch work 
via the MFT and opensource tools in ubuntu,


Though, I was wondering if anyone knew of any guide or resources for 
setting up a cluster for MPI based computations in a linux/debian 
environment? Some guides about how to make it work with SLURM would 
also be appreciated.


Thanks in advance for any suggestions, I am often a user of clusters, 
but it is my first time setting one up.


Cheers,

Leonardo

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PERA Christophe+33 4 26 23 44 88
   06 76 20 54 47
Université Claude Bernard Lyon 1
Departement de Mécanique
Bat Omega 721 - 2ème étage
43 Boulevard du 11 Novembre 1918
69622 Villeurbanne CEDEX
http://p2chpd.univ-lyon1.fr/
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