Tag: Open Source

How to migrate data from Cassandra to Elassandra in Docker containers

A client recently asked us to migrate a Cassandra cluster running in Docker containers to Elassandra, with the data directory persisted via a bind mount. Elassandra is a fork of Cassandra integrated closely with Elasticsearch, to allow for a highly scalable…

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Join Pythian at Percona Live 2018

Percona Live 2018 is coming up soon, and Pythian is excited to be participating again this year. The Percona Live Open Source Database Conference is the premier open source database event for individuals and businesses that develop and use open…

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What to expect at FOSDEM 2018

It’s that time of the year again— FOSDEM is coming up next weekend in Brussels February 3-4, 2018. FOSDEM stands for Free and Open Source Developers European Meeting. It’s an annual event that has gained popularity over the last few years…

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Eight Ways To Ensure Your Applications Are Enterprise-Ready

Elliot Zissman, Managing Director at Pythian, provides practical tips to ensure your organization’s applications are enterprise-ready.

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Why the Python Data Model Could be for You

David Salmela explains what is so great about the Python data model being so simple. Learn how Python will allow you to hit the ground running with its ease-of-use framework.

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fsfreeze in Linux

The fsfreeze command, is used to suspend and resume access to a file system. This allows consistent snapshots to be taken of the filesystem. fsfreeze supports Ext3/4, ReiserFS, JFS and XFS. A filesystem can be frozen using following command: #…

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Using strace to debug application errors in linux

strace is a very useful tool which traces system calls and signals for a running process. This helps a lot while debugging application level performance issues and bugs. Aim of this post is to demonstrate the power of strace in…

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Troubleshooting a Multipath Issue

Multipathing allows to configure multiple paths from servers to storage arrays. It provides I/O failover and load balancing. Linux uses device mapper kernel framework to support multipathing. In this post I will explain the steps taken to troubleshoot a multipath…

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Calculating Business Days in HiveQL

One of the common tasks in data processing is to calculate the number of days between two given dates. You can easily achieve this by using Hive DATEDIFF function. You can also get weekday number by using this more obscure…

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PGBR 2013 Porto Velho insights

It’s been 4 years since the last time I spoke at the Postgres Brazilia community event (last time I spoke was at PGCon 2009 Sao Paolo – PyReplica project) and seems that the community is still growing and vibrant. The…

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