21 May 2013

The Ruby Reflector

Topic

Cassandra

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By Todd Hoff of High Scalability 5 days ago.
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…Finally, it naturally integrates chain-replication and can thus tolerate faults of both clients and servers. We have fully implemented linear transactions in a commercially available data store. Experiments show that the throughput of this system achieves 1-9× more throughput than MongoDB, Cassandra and HyperDex on the Yahoo! Cloud Serving Benchmark, even though none of the latter systems provide transactional guarantees.

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By Todd Hoff of High Scalability 7 days ago.
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…Thumbtack Technology YCSB Benchmark shows Aerospike nearly 10x faster than Cassandra, Couchbase and Mongodb. Read it now!

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By Damien Katz of Damien Katz 18 days ago.
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We tend to think of working hard as a good thing. We value a strong work ethic and determination is the face of adversity. But if you are working harder than you should to get the same results, then it's not a virtue, it's a waste of time and energy. If it's your business systems that are working harder than they should, it's a waste of your IT budget.

Dynamo based systems work too hard. SimpleDB/DynamoDB, Riak, Cassandra and Voldemort are all based, at least in part, …

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Topic: "MariaDB Cassandra Interoperability"

Monty Widenius and Sergei Golubchik, VP Architecture, Monty Program Ab

Topic: "Replication Changes in MariaDB"

Sergei Golubchik, VP Architecture, Monty Program Ab

Topic: "Storage Engines and Other Plugins: What's New?"

The Percona Live MySQL Conference includes a Diamond Sponsor Keynote panel on Wednesday morning on the "Impact of MySQL 5.6 …

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…terabytes of ephemeral local SSD storage. Databases such as Riak, Cassandra, and MongoDB can take advantage of super fast reads and writes while avoiding data loss in clustered environments.

The key word is ephemeral—if your instance dies, so does your data. This is why we would only recommend the use of local SSDs in clustered database setups (with three or more nodes) or for use in applications where data can safely be lost.

Enabling The Feature

We have created an early access …

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On paperplanes 11 months ago.
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…the better-known NoSQL databases, including Riak, Redis, Cassandra, CouchDB and MongoDB. That was in early 2011. I wrote a chapter on MongoDB, but it didn't feel right to me, so I tried a different approach on the Riak chapter, much more focused on being practical and introducing the user-facing concepts in a streamlined way, building up as the book progresses.

That approach felt much more natural to me, so eventually I started on the Redis chapter and thought I nailed it. …

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…solutions

Working towards a GA release for MySQL 5.5 (currently in beta)

Additionally, we are actively working on expanding the supported NoSQL stack on Engine Yard Managed. Are you an Engine Yard Managed customer interested in Riak or Cassandra? Let us know!

Remember that you can always influence our roadmap by submitting data feature requests .

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By Shannon -jj Behrens of JJinuxLand 1 year ago.
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Data in Cassandra looks like a multi-level dict.

By default, Cassandra eats 1/2 of your RAM. You might want to change that ;)

He uses pycassa for his client. It's the simplest approach.

telephus is a Cassandra client for Twisted.

cassandra-dbapi2 is a Cassandra client that supports DBAPI2. It's based on Cassandra's new CQL interface.

Don't use pure Thrift to talk to Cassandra.

Cassandra is good about scaling up linearly.

There's a batch …

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By Jonathan Ellis of Spyced 1 year ago.
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…to do as effectively in prose alone. Sylvain's talk on the Cassandra storage engine at FOSDEM 2012 is a good example. Starting at about 22:00, he explains how Cassandra uses log-structured merge trees to turn random writes into sequential i/ o. Compare that with the treatment in the Bigtable paper , or the original LSTM paper . Sylvain's explanation is much more clear by virtue of how it's presented.

I avoid audio or video during my …

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On igvita.com over 1 year ago.
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Google's BigTable, Hadoop's HBase, and Cassandra amongst others are all using a variant or a direct copy of this very architecture.

Simple on the surface, but as usual, implementation details matter a great deal. Thankfully, Jeff Dean and Sanjay Ghemawat , the original contributors to the SSTable and BigTable infrastructure at Google released LevelDB earlier last year , which is more or less an exact replica of the architecture we've …

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