IT, operating systems, maths, and more.
Today I’ll share my configuration for Spark running in EMR to connect to Redshift cluster. First, I assume the cluster is accessible (so configure virtual subnet, allowed IPs and all network stuff before running this). I’m using Zeppelin so I’ll show two interpreters configured for the connection, but the same thing should work with standalone … Continue reading Connecting to Redshift from Spark running in EMR
Recently I was investigating machine waking up from sleep without any user interaction. It was a bit irritating because user was putting his PC to sleep and leaving it for a day just to notice in the evening that the machine woke up and was on for most of the time. Event viewer showed this: … Continue reading UpdateOrchestrator waking up the machine
This is the fifteenth part of the .NET Inside Out series. For your convenience you can find other parts in the table of contents in Part 1 – Virtual and non-virtual calls in C# Windows supports multiple desktops for a long time. We may want to run an application on different one than the current … Continue reading .NET Inside Out Part 15 — Starting process on different desktop
I was working with seemingly simple load job in Redshift. I was generating some data and wanted to store the output in separate table, just to persist it for debugging purposes. However, since the job could be reran if needed, I wanted to remove rows generated previously and add new ones. So I tried the … Continue reading Aborted transactions in Redshift due to Serializable isolation level
Recently I was working with the following code: I was compiling it with on Windows 10 x64. It wasn’t working because of the following: You can try reproducing the issue at compilejava.net, it throws the error at the moment. I was almost sure that it was a bug in javac, especially that the code was … Continue reading Erasure type inference issue in Java