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So far bcllc has created 103 blog entries.

Plotting average read and write operation size by ASM disk for Oracle

  Throughput, throughput, throughput - for many databases, this is the performance measure of importance.  When you are working with a fixed number of IOPS but see mixed workload types, system health can be assessed through the average read and write operation size.  In an ASM environment, we can query this information by ASM disk

By |2013-06-12T10:01:22-04:00June 12th, 2013|Consulting, Programming|0 Comments

Plotting Oracle RMAN backup durations with R

  How long does your Oracle RMAN backup take to complete?  How does this vary over time?  Are there patterns by week, week of month, or day of week?   The gist below can help you evaluate questions like these.  If you're interested in using R with Oracle more generally, check out this previous post

By |2013-06-03T20:44:00-04:00June 3rd, 2013|Consulting|0 Comments

Revisiting text processing with R and Python

  Back in 2011, I covered the relative performance difference of the most popular libraries for text processing in R and Python.   In case you can't guess the answer, Python and NLTK  won by a significant margin over R and tm.  Text processing with R seemed simple on paper, but performance and flexibility limitations have

By |2013-05-25T21:19:25-04:00May 25th, 2013|Consulting, Programming|0 Comments

Automating Oracle Database deployment with Amazon Web Services, fabric, and boto – SEMOP Talk, Feb 12, 2013

I'll be giving a talk tonight on automated Oracle database deployment at the SouthEast Michigan Oracle Professionals (SEMOP) Meetup Group. While I'll be following up on this post later, I wanted to share the slides and Github repository for participants to follow along: Automating Oracle Database deployment with Amazon Web Services, fabric, and boto from mjbommar Github

By |2013-02-12T17:02:23-05:00February 12th, 2013|Cloud, Consulting, Programming|0 Comments

Connecting R to an Oracle database with RJDBC

In many circumstances, you might want to connect R directly to a database to store and retrieve data.  If the source database is an Oracle database, you have a number of options: ROracle RODBC RJDBC   Using ROracle should theoretically provide you with the best performing client, as this library is a wrapper around the

By |2012-11-22T11:00:36-05:00November 22nd, 2012|Consulting, Programming|8 Comments

Retrieving the VIX term structure in R

  Much of my time lately has gone into analyzing and trading products in the volatility complex.  As a result, I regularly watch the VIX term structure for continuations or deviations from trend.  To make analysis simpler, I've written some R code that rips the term structure off the CBOE VIX term structure page and

By |2012-11-05T07:22:44-05:00November 5th, 2012|Consulting, Programming|1 Comment

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This Sliding Bar can be switched on or off in theme options, and can take any widget you throw at it or even fill it with your custom HTML Code. Its perfect for grabbing the attention of your viewers. Choose between 1, 2, 3 or 4 columns, set the background color, widget divider color, activate transparency, a top border or fully disable it on desktop and mobile.

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