Configure PS of PYNQ to work with SDK

Hi,

If you’re an FPGA fan or someone who’s got PYNQ board for fun, you might be having a hard time making it run Vivado SDK projects. That’s because, the PYNQ-Z1, the cheap Zynq-7020 board doesn’t have any popular DDR ram on board. You need to configure it by hand, however, tcl is at your rescue.

Continue reading Configure PS of PYNQ to work with SDK

Stuff You Can Do While Tuning HBase

So you are setting up HBase! Congratulations! When it comes to tuning HBase there are so many things you can do. And most of the things will be dependent upon type of data you will be storing and it’s access patterns. So I will be saying this a lot: ‘value of this parameter depends upon your workload’. Here I will try to enlist some of the variables that you can tweak while tuning hbase. This list is not at all exhaustive. Continue reading Stuff You Can Do While Tuning HBase

Resize EBS Root Volume of CentOS 6 AMI

So the other day I had to create a CentOS 6 AMI for HDP installation as it had Hue package available only for CentOS 6. I launched an instance with EBS attached of 10 GB with CentOS 6. Went on to create AMI out of it with EBS size of 100GB.

These all went good and I proceed with launching instances for HDP cluster (12 was the number of instances). Everything went good and installation was complete. Later only Ambari Server  started throwing warnings about disk space. Despite attaching a 100 GB EBS. Continue reading Resize EBS Root Volume of CentOS 6 AMI

Debugging Stuck Process in Linux

The other day I faced a problem with monitoring setup and I found that the WebUI is not responding. I SSHed into server and checked if process is running. It was. Checked if port was open. It was. So as it happened, the process was running and listening on port but it was stuck somewhere and it was not accepting connection. So there it was, a running stuck process. Continue reading Debugging Stuck Process in Linux

Simple Distributed File System in Python : PyDFS

I was reading on HDFS (Hadoop’s distributed file system) and it’s internals. How does it store data. What is reading path. What is writing path. How does replication works. And to understand  it better my mentor suggested me to implement the same. And so I made PyDFS. (Screenshots at bottom of the post) Continue reading Simple Distributed File System in Python : PyDFS