Author Archives: admin

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

Posted in Data Analysis | Leave a comment

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

Posted in Data Analysis | Leave a comment

Apply for our Student Hourly Position

The link for students to apply is: https://employment.ku.edu/student/8685BR 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.

Posted in Data Analysis | Leave a comment

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

Posted in Data Analysis | Leave a comment

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

Posted in Data Analysis | Leave a comment

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

Posted in Data Analysis | Leave a comment

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

Posted in Programming | Tagged | Leave a comment

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

Posted in Data Analysis | Leave a comment

Cluster user update

We will have a cluster update meeting on Friday at 10AM in Watson Room 440D (within the suite of the Digital Humanities group). Today the Center for Research Computing announced the re-opening of the compute cluster. A number of features … Continue reading

Posted in Data Analysis | Leave a comment

Long-running Mplus Bootstrapping Example

In the high performance computing example archive, we've just inserted Example 05, a long-running multi-core Mplus exercise. https://gitlab.crmda.ku.edu/crmda/hpcexample/tree/master/Ex05-Mplus-1 This one demonstrates how I suggest we ought to keep the data, code files, and output files in separate folders, even if … Continue reading

Posted in Data Analysis | Leave a comment