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developers
9 January, 2012

Your Ideal Performance: Consistency Tradeoff

Authors: Paul Cannon

The term eventual consistency often seems to bother newcomers to distributed data storage systems. Hopefully this post will be able to put a more concrete face on it. (If you are…

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company
5 January, 2012

Getting Started with Apache Cassandra

Authors: Robin Schumacher
Apache Cassandra™, Get Started

If you haven't begun using Apache Cassandra yet and you wanted a little handholding to help get you started, you're in luck. This article will help you get your feet wet with…

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developers
13 December, 2011

Test driving the new CQL utility

Authors: Robin Schumacher

One very nice feature Cassandra offers over other NoSQL databases is the Cassandra Query Language (CQL). In fact, I’ll go so far as to say CQL is an unsung hero of Cassandra and…

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developers
1 November, 2011

Install Cassandra, CQL, and OpsCenter in 5 Minutes? You Bet!

Authors: Robin Schumacher

If you think that installing Cassandra software is difficult and time-consuming, well, think again. We’ve just posted a new video to our new Cassandra Essentials tutorial series …

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developers
14 October, 2011

What’s new in Cassandra 1.0: Performance

Authors: Jonathan Ellis

As we've worked towards 1.0 over the past year, Cassandra's performance has improved spectacularly. Compared to the current release this time in 2010, we've increased our write…

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developers
11 October, 2011

When to Use Leveled Compaction

Authors: Tyler Hobbs

The Leveled Compaction Strategy was introduced in Cassandra 1.0 to address shortcomings of the size-tiered compaction strategy for some use cases. Unfortunately, it's not always…

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developers
10 October, 2011

Leveled Compaction in Apache Cassandra

Authors: Jonathan Ellis
Apache Cassandra™

Introduction to Compaction Cassandra's log-structured storage engine enables Cassandra's amazing performance and features like application-transparent compression by turning all…

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developers
3 October, 2011

Hadoop MapReduce in the Cassandra Cluster

Authors: Eric Gilmore
Hadoop

NOTE: This post pre-dates our Brisk announcement. Brisk is a new distribution that enhances the Hadoop and Hive platform with scalable low-latency data capabilities. In our…

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developers
29 September, 2011

What’s New in Cassandra 1.0: Improved Memory and Disk Space Management

Authors: Jonathan Ellis

Cassandra 1.0 incorporates several improvements to how Cassandra's storage engine manages memory and disk space, bringing better performance and addressing some of the most common…

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developers
19 September, 2011

What’s new in Cassandra 1.0: Compression

Authors: Pavel Yaskevich

Cassandra 1.0 introduces support for data compression on a per-ColumnFamily basis, one of the most-requested features since the project started. Compression maximizes the storage…

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developers
1 September, 2011

Using the Cassandra Bulk Loader

Authors: Sylvain Lebresne
DataStax Bulk Loader

Bulk loading data in Cassandra has historically been difficult. Although Cassandra has had the BinaryMemtable interface from the very beginning, BinaryMemtable is hard to use and…

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developers
20 June, 2011

Brisk 1.0 Beta 2 Released

Authors: Kris Hahn

DataStax has released Brisk 1.0 Beta 2! You can download Brisk from the DataStax web site. New Features in Brisk 1.0 Beta 2 The following new features have been added in this…

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developers
17 June, 2011

What’s New in Cassandra 0.8, Part 2: Counters

Authors: Sylvain Lebresne

Deprecation warning This post covers the obsolete Cassandra 0.8. Modern Cassandra uses counters via CQL. Original post One of the features making its debut in Cassandra 0.8.0 is…

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developers
31 May, 2011

Understanding Hinted Handoff (in Cassandra 0.8)

Authors: Jonathan Ellis

This post describes hinted handoff for obsolete versions of Cassandra. For a description of how it works today, see this update Hinted Handoff is an optional part of writes whose…

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developers
4 April, 2011

Maximizing Cache Benefit with Cassandra

Authors: Eric Gilmore

Cassandra’s built-in key and row caches can provide very efficient data caching. Already, several Cassandra users who care deeply about read performance have leveraged these caching…

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developers
22 March, 2011

Deploying Cassandra across Multiple Data Centers

Authors: Eric Gilmore

Cassandra is designed as a distributed system, for deployment of large numbers of nodes across multiple data centers. Key features of Cassandra’s distributed architecture are…

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developers
6 January, 2011

What’s new in Cassandra 0.7: expiring columns

Authors: Sylvain Lebresne

Deprecation warning This post covers the obsolete Cassandra 0.7. Modern Cassandra manipulates expiring columns using CQL. Original post Sometimes, data comes with an expiration…

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developers
3 December, 2010

What’s new in Cassandra 0.7: Secondary indexes

Authors: Jonathan Ellis

Deprecation warning This post covers the obsolete Cassandra 0.7. Modern Cassandra manipulates indexes using CQL. Overview In Cassandra, indexes on column values are called "…

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developers
11 November, 2010

SPOF 0: Why Every Node in a Cassandra Cluster is the Same

Authors: DataStax

In a distributed system, component failure should be expected, particularly as the size of the infrastructure grows. Single points of failure in systems marketing themselves as…

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29 October, 2010

Why does Scalability matter, and how does Cassandra scale?

Authors: Matt Pfeil

The term scalability is inherently a bit amorphous and typically dependent on a specific use case. For the sake of this discussion, we'll define scalability as the ability to add…

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developers
22 October, 2010

What is persistence and why does it matter?

Authors: Matt Pfeil
Architecture

Understanding the meaning of persistence is important for evaluating different data store systems. Given the importance of the data store in most modern applications, making a…

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developers
12 October, 2010

What is Cassandra?

Authors: Matt Pfeil

Apache Cassandra is a high performance, scalable open source database designed for real time transactions and analytics. Cassandra offers sub millisecond read and write times - it's…

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developers
14 September, 2010

Cassandra Flume Sink and Logsandra Integration

Authors: Tyler Hobbs

Flume is an open source project described as a “distributed, reliable, and available service for efficiently collecting, aggregating, and moving large amounts of log data”. Because…

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developers
9 August, 2010

(Re)Introducing Hector: A Java-based Client for Apache Cassandra

Authors: DataStax

Deprecation warning Hector is a client for the obsolete Thrift API. New applications should use the DataStax Java Driver. Hector Hector, the first actively supported Java client…

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