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- Erik Erlandson – Tool Monkey: Implementing Parallel Prefix Scan as a Spark RDD Transform
In my previous post , I described how to implement the Scala scanLeft function as an RDD transform. By definition scanLeft invokes a sequential-only prefix scan algorithm; it does not assume that either its input function f or its initial-value z ca …
Feed Item – 12 August 2014
- Miha’s Blog: Video: Notes About User Experience in HPC
My presentation video from San Francisco HPC Meetup Group. …
Feed Item – 4 September 2014
- Pegasus news feed: Pegasus 4.4.0 Released
We are happy to announce the release of Pegasus 4.4.0 Pegasus 4.4.0 is a major release of Pegasus which contains all the enhancements and bugfixes in 4.3.2 New features and Improvements in 4.4.0 include substantial performance imp …
Feed Item – 9 July 2014
- Derek’s Blog: A HCC Dashboard with OSG Accounting
After the 2013 SuperComputing Conference , we found ourselves with a extra monitor at HCC . Therefore, I set about creating a dashboard which can show the current status of HCC. Creating the DashboardI have an interest in data visualization, a …
Feed Item – 12 March 2014
- OSG Security News and Announcements: Oracle releases security updates for Java this week
Oracle has released new versions of Java to address multiple security issues. There does not appear to be any remote unauthenticated vulnerabilities in server installs, however there are serious vulnerabilities in client side installs.As a precaution, e …
Feed Item – 22 January 2015
- Erik Erlandson – Tool Monkey: Faster Random Samples With Gap Sampling
Generating a random sample of a collection is, logically, a O(np) operation, where (n) is the sample size and (p) is the sampling probability. For example, extracting a random sample, without replacement, from an array might look like this in pseudocod …
Feed Item – 11 September 2014
- Erik Erlandson – Tool Monkey: The Scala Iterator ‘drop’ Method Generates a Matryoshka Class Nesting
The Scala Iterator drop method has a complexity bug that shows up when one calls drop repeatedly, for example when traversing over an iterator in a loop. The nature of the problem is that drop, under the hood, invokes slice, which returns a new anon …
Feed Item – 3 September 2014
- OSG Security News and Announcements: News for OSG users with CILogon CA certificates
The OSG Security Team wants to inform that Protect Network, one of theIdentity Providers accepted by the CILogon CA, will no longer beavailable after 12/31/2014. Most OSG users are getting certificatedirectly via the OSG CA, however CILogon has been ava …
Feed Item – 17 December 2014
- Condor Project News: HTCondor 8.3.2 released! ( December 23, 2014 )
The HTCondor team is pleased to announce the release of HTCondor 8.3.2. This development series release contains new features that are under development. This release contains all of the bug fixes from the 8.2.6 stable release. This new version …
Feed Item – 23 December 2014
- News and Announcements from OSG Operations: GOC Services Update – Tuesday, January 27th, 2015 at 13:00 UTC
The GOC will upgrade the following services beginning Tuesday, January 27th, 2015 at 13:00 UTC. The GOC reserves 8 hours in the unlikely event that unexpected problems are encountered. MyOSG 2.32 * meshconfig / removing GOC to WLCG meshconfig re …
Feed Item – 20 January 2015