Twitter, the world's most famous Microblogging service picked Cassandra as alternative to their MySql database system.
Cassandra is a no-sql open source distributed database management system. One of the top-level Apache Software Foundation projects, written in Java and first developed by Facebook to develop their Inbox Search features.

Apache's Cassandra, the "NoSQL" distributed data store, has been updated to version 0.6, adding support for Apache Hadoop, integrated caching and improved performance

versatile replacement for vmstat, iostat, netstat, nfsstat and ifstat. Dstat overcomes some of their limitations and adds some extra features, more counters and flexibility. Dstat is handy for monitoring systems during performance tuning tests, benchmarks or troubleshooting.

Founded by a leading Cassandra developer, new company Riptano offers training, consulting, and support for the Apache Cassandra NoSQL database

Thousands concurrent parallel read write accesses over tens of millions of small files is a terrible performance tuning problem for e-mail servers.

You must understand and fine tune all your infrastructure chain, following the previous articles for data storage and multipath on Debian 5.x Lenny.

An overburdened CPU is another obvious place to look for performance problems on your system. Similarly io can be a bottleneck in proper system performance. You can watch various parameters if you install sysstat package. On Ubuntu you can install with $ sudo apt-get install sysstat

Article about vmstat tool, to check the memory status in a Linux system, explaining the terms that vmstat uses, and also how to solve some memory problems, (only some hints)

In this post, I wanted to hit on the basics of working with RPM's in Linux (RPM stands for the Redhat Package Management system - basically, they're the software packages that make up your system). In later posts we'll go into some neat tricks... But for now, we'll stick with the basics.

The final version of Linux Mint 3.0 (codename Cassandra) burst onto the Linux scene today, based on Bianca and compatible with Ubuntu Feisty and its repositories.