Author Archives: admin

R modules: Super Exciting New Updates

This is revised Monday, July 24, 2017. Some of you have reported segmentation faults during the past week. We learned they come from 3 different problems. First, some people have R packages compiled in their user accounts. These fall out-of-date … Continue reading

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Rstats/3.3 and Rstats/3.4 updates: dealing with OpenMPI and Infiniband library concerns.

Dear CRMDA cluster users During the past 2 months, some of us have seen the MPI warning from parallel R programs: An MPI process has executed an operation involving a call to the "fork()" system call to create a child … Continue reading

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kutils update

kutils, our utility package that includes the Variable Key framework, was updated to version 1.0 on CRAN last week. Minor bug fixes will be offered in our package server KRAN, which users can access by running R code like this … Continue reading

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Cluster faster, Rstan optimized as of 2017-05-17

Special thanks to Wes Mason of the ITTC. There are 2 breakthroughs to report today. Nodes are faster During the spring, users reported that calculations were taking longer. I raised the problem with Wes and he did some diagnosis. It … Continue reading

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Apply for our Student Hourly Position

The link for students to apply is: The last day students can apply is May 23, 2017, and committee members can review candidates by logging into the BrassRing system on or after May 24, 2017.

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R Packages available for CRMDA cluster members

This is the 20170425 update, which includes an updated module set and reports of success with Java and TkTcl-based R packages. In other words, an almost complete victory is achieved. Special thanks to Wes Mason of ITTC. To use R, … Continue reading

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Revolutions R in new acf cluster

The cluster runs on RedHat RHEL 6, which is too old to support the new versions of R. The principal weakness is the older gcc compiler in RHEL6. In the cluster, however, we have access to much newer Intel MKL … Continue reading

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Making sure fonts are embedded in LaTeX thesis and dissertation documents

KU thesis rules require that all fonts used in the submitted PDF document must be embedded in the document itself. This is required to eliminate the problem that special symbols are not legible in the document on the receiver's computer. … Continue reading

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ACF Cluster resource limits: home file space and file quota

User home folders are limited at 100GB and no customization is allowed. To our users who were previously limited to 20GB, that's great news. To the others who had 600GB allocations, that's disaster. Oh, well. Just one among many. When … Continue reading

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Interactive sessions on HPC

Danger: new smaller memory default! At the user meeting on April 12, we found out that requesting 1 core will automatically provide only 500MB of memory. This is a BIG change, because in older cluster we received 2GB per core … Continue reading

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