High Performance Computing encompasses using "supercomputers" with high numbers of CPUs, large parallel storage systems and advanced networks to perform time-consuming calculations. Parallel algorithms and parallelization of storage are essential to this field, as well as issues with complex, fast ...

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HPC 2008 Time Share Single Core (Fractional Resource Scheduling)

Windows HPC 2008 appears to be restricted to one task per core. Is there anyway to time share multiple tasks (or jobs) over a single core?
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Windows HPC Server 2008: private network across VMs?

Windows HPC Server 2008 provides the option to automatically deploy OS images to new cluster node, using Windows Deployment Services. However, this requires the HPC cluster to be set up with a ...
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Numerous pbs_server errors in /var/log/messages

On supercomputer's management node we receive numerous errors such as: pbs_server: LOG_ERROR::is_request, bad attempt to connect from 10.10.0.254:1023 (address not trusted - check entry in ...
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Why does requesting GPUs as a generic resource on a cluster running SLURM with the built-in plugin fail?

Disclaimer: This post is quite long as I tried to provide all relevant configuration information. Status and Problem: I adminster a gpu cluster and I want to use slurm for job management. ...
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362 views

Building Windows server cluster hpc

I'm trying to set up a Windows Server cluster with a head node and 2x compute nodes. So far, i've managed to install : (thanks to this tutorial http://msdn.microsoft.com/en-us/library/jj884142.aspx) ...
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deploying base note for HPC cluster in server 2012R2 hangs

We are in the process of evaluating server 2012R2 standard with HPC pack for a small cluster of nodes (about 40 to start with - the current setup has only one compute node). For the moment we use old ...
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176 views

HPC / EC2 - optimizing NFS for relialibility

In AWS-EC2, I've set-up a cluster of linux virtual machines made of an NFS fileserver and many clients. If the number of clients is above ~20, under heavy I/O, I am experiencing loss of file ...
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249 views

Open MPI can't launch remote nodes via SSH

I am trying to set up Open MPI between a few machines on out network. Open MPI works fine locally, but I just can't get it to work on a remote node. I can ssh into the remote machine (without ...
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58 views

Windows HPC Server 2008 R2 SP3 upgrade

It's not clear to me from reading the documentation if I must update the clients, or whether I can just update the head node and compute nodes. Does anyone have any experience of this? I don't want ...
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Programs running in an NX session seem to pause when session disconnects

We are currently running an interactive HPC application which presents a graphical interface to the user, attaches to an HPC cluster and allows them to run and observe some computation. The user logs ...
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Deployment of Base-Node via iSCSI in Server 2012R2 HPC cluster fails (can not join domain)

We are currently evaluating Server 2012R2 with HPC Pack for an upcoming project. Sadly we are stuck at deploying the base node. The node boots via PXE (iPXE) and connects to iSCSI, installs Windows ...
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455 views

Setting up computational cluster using infiniband fails

My task: I need to assemble computational cluster, consists of two nodes using infiniband technology. When I try to start mpirun ... for two nodes, the process hangs. If i try to use flag ...
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Microsoft HPC: mixing windows and linux blades

I have a working Windows HPC cluster with 32 blades, all of them are using Windows HPC. My question is: can I install Linux on 16 blades and keep the other 16 on Windows? Is there a specific version ...
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Job run-time variations on dual socket computer

I'm running scientific software (WRF-NMM, atmosphere simulation, weather prediction). On all computers I used it, job running times of run cycles were consistent. All those machines were one socket, ...
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What happens between I transfer from a shell in a head node to that in a computer node

I'm using a HPC that uses the PBS job managing system. Usally for getting a computer node, I have to go through these process: I first login to the head node, and I get a shell ssh user@remote ...