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to rely on simple ASCII tools to help debug the problems. I have found vmstat invaluable for diagnosing misbehaving nodes or checking or profiling user applications. For example, often when a user

 conducted. In this article we profile I/O at the block layer to help you make the best storage decisions. ... /O profiler, or ioprof. ioprof When I discovered that understanding the output of blktrace was not so easy, I looked around for some “postprocessing” tools and came across ioprof. The website introduces ...  conducted. In this article we profile I/O at the block layer to help you make the best storage decisions. ... I/O Profiling at the Block Level

with my /home/layton directory on my local system (host = desktop ). I also access an HPC system that has its own /home/jlayton directory (the login node is login1 ). On the HPC system I only keep some

to big data, casino operators can create granular customer profiles. The Flamingo Hotel of Caesars Entertainment in Las Vegas alone employs 200 big data analysts. Specialized analytics solutions

). In fact, that’s the subject of the next article. The Author Jeff Layton has been in the HPC business for almost 25 years (starting when he was 4 years old). He can be found lounging around at a nearby

or sar+ksar). Others gather metrics for clusters (e.g., Ganglia or Cacti), and some come with plotting tools built-in using the RRDtool database. Some tools are specifically for performance profiling

toward improving application performance (profiling). However, how do you profile across a cluster, and how do you make it part of a “job”? I think this is a developing area of monitoring, and one

of the code. You are using asynchronous data transfers, you limit the number of collective operations, you are using a very low latency and high bandwidth network, you have profiled your application

(Listing 3). Listing 3: Configuring Lmod init Scripts [root@test1 profile.d]# ln -s /usr/local/lmod/lmod/init/profile /etc/profile.d/modules.sh [root@test1 profile.d]# ln -s /usr

/yum.conf # . /etc/profile.d/modules.sh # module load openmpi-x86_64 # ompi_info | grep -i grid   MCA ras: gridengine (MCA v2.0, API v2.0, Component v1.5.4) # echo "module load openmpi-x86_64" >> /etc/profile