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Post_F_G_T_Pythian+Blackbird

Today, we announced that Pythian has entered into an agreement to acquire Blackbird.io, itself the result of a recent merger between PalominoDB and DriveDev. I want to start with a hearty welcome to the 40+ new esteemed collaborators joining our firm today. Simultaneously, I want to welcome Blackbird.io’s valued clients to the Pythian family. I…

ALL POSTS

Using SaltStack for Configuration Management

In my last blog post I mentioned that SaltStack is a fully featured configuration management solution, but we never looked into using the tool in that way. Today we will begin to explore some basic examples of configuration management with SaltStack.  We will look at two aspects of configuration management, installing a package, and will…

How To Correlate Oracle Database Transaction with GoldenGate

So there I was troubleshooting GoldenGate issue and was puzzled as to why GoldenGate transactions were not seen from Oracle database. I had the transaction XID correct; however, I was filtering by ACTIVE transaction from Oracle which was causing the issue. Please allow me to share a test case so that you don’t get stumped…

Changing Failgroup of ASM Disks in Exadata

There was a discrepancy in the failgroups of couple of ASM disks in Exadata. In Exadata, the cell name corresponds to the failgroup name. But there were couple of disks with different failgroup names. Using the following plan to rectify the issue online without any downtime:

Small Files on MapR-FS

One of the well-known best practices for HDFS is to store data in few large files, rather than a large number of small ones. There are a few problems related to using many small files but the ultimate HDFS killer is that the memory consumption on the name node is proportional to the number of…

Cloudera Challenge 2014

Yesterday, Cloudera released the score reports for their Data Science Challenge 2014 and I was really ecstatic when I received mine with a “PASS” score! This was a real challenge for me and I had to put a LOT of effort into it, but it paid off in the end! Note: I won’t bother you…

Auditing Files in Linux

Stat command in Linux can be used to display a file or a file system status. I came across an issue in RHEL4 where a file’s ‘Change time’ is far ahead than the ‘Modification time’ without a change in uid, gid and mode. # stat /etc/php.ini File: `/etc/php.ini’ Size: 45809 Blocks: 96 IO Block: 4096…

Lock Timeout Error While Creating Database

Recently I worked on a issue where a third-party application was failing during the installation. Below was the error returned by the Application. Lock request time out period exceeded. (Microsoft SQL Server, Error: 1222) The application was failing while it was trying to create a database. The application seemed to have a default timeout setting…

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