ACT knowledge base

10 most recent knowledge base articles

Installing Nvidia Drivers on RHEL or CentOS 7

Most users of Nvidia graphics cards prefer to use the drivers provided by Nvidia. These more fully support the capabilities of the card when compared to the nouveau driver that is included with the distribution. These are the steps to install the Nvidia driver and disable the nouveau driver. yum -y update yum -y groupinstall …

 

Adding new nodes to an existing cluster

The following steps apply if you are adding in new nodes to your cluster and these nodes will be cloned from your existing nodes image. First edit /act/etc/act_nodes.conf and add your new node definitions below the existing node definitions. If you do not have these already they can be provided by ACT support. Next edit /act/etc/act_util.conf $ …

 

How do I tune my HPL.dat file?

Tuning HPL can be a long and difficult process.  Once you’ve found the perfect BLAS library for your architecture, now you need to create a perfect HPL.dat file.  Use the form below and generated output file as a starting point on getting the best GFLOP number you can out of your cluster. Input Nodes: Cores …

 

What do I need to do when replacing a motherboard?

After replacing a failed motherboard, steps need to be taken to allow the network configuration in Linux work without disruption.  Here, we outline the steps to take on an Enterprise Linux system.  Console access is required for the node getting the replacement; the local steps can be taken as soon as the motherboard is replaced …

 

Building WRF on ACT systems

WRF has many options that may be unique to any particular installation. This article is to help you get up and running with WRF as quickly as possible without having to rediscover the right settings. Below are the steps to build all dependencies for WRF 3.6 as of August 2014. Background Systems installed by ACT …

 

Common questions when using Areca Cli64

What is the status of my raid array? You can obtain an overview of the arrays status using the cli64 rsf info command. [root@localhost ~]# cli64 rsf info # Name Disks TotalCap FreeCap DiskChannels State =============================================================================== 1 Raid Set # 00 2 240.0GB 0.0GB 12 Normal =============================================================================== GuiErrMsg: Success. [root@localhost ~]# You can also obtain an overview …

 

My Areca raid controller is beeping, how do I make it STOP?!

*WARNING* – Only continue with this operation after the cause of the alarm has been identified* First we must authenticate to the controller by passing a password, the default is 0000. [root@localhost ~]# cli64 set password=0000 GuiErrMsg: Success. [root@localhost ~]# Now we can mute the beeping! [root@localhost ~]# cli64 sys beeper p=0 GuiErrMsg: Success. [root@localhost …

 

What is Cli64?

Cli64 is a (poorly named) proprietary tool developed by Areca that provides reporting AND management functions from userspace. If installed from the ACT repo the binary is located at /usr/local/bin/cli64. The default password for the controller is 0000. [root@localhost ~]# cli64 ? Copyright (c) 2004-2011 Areca, Inc. All Rights Reserved. Areca CLI, Version: 1.86, Arclib: …

 

How do I unpack my cluster hardware?

WARNING: The components of an Apex Cluster can be very heavy. Some pre-assembled clusters are over 2000 lbs. Great care must be used when unpacking and/or moving a cluster or any of its components.   Check For Shipping Damage Despite all attempts at safe and secure packaging, occasionally some packages get damaged during shipping. Any suspected …

 

Creating Groups of Nodes in TORQUE

Despite being a simple first in/first out (FIFO) scheduler, pbs_sched can use node properties to emulate host groups. This can be useful if you have different types of nodes that provide different types of resources. The nodes available in TORQUE are controlled by the file /var/spool/torque/server_priv/nodes. The most basic configuration simply lists the nodes and …

 
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