David DeMartini online

California Dreamin’ — setting up the new California Office

David — Tue, 24 Apr 2012 21:41:08 +0000

It has been a long 8 months since the decisions was made to re-locate operations to Santa Cruz, California. On April 16th, the first of the equipment, furniture, and transient stuff arrived in California from the Washington office.

Despite all the best intentions and plans, construction of the office conference room is still underway, so [...]

Cassandra – Getting Started – (deployment Part 2 – Installing Ops Center)

David — Mon, 26 Mar 2012 16:00:19 +0000

= 0.8.0 is 7199. If you are using # Cassandra 0.7.*, the default is 8080, and you should change this to # reflect that. port = 8001 [...] [webserver] port = 8888 interface = 10.1.0.23 staticdir = ./content log_path = ./log/http.log [...] [cassandra] # a comma-separated list of places to try for a connection to [...]

Cassandra – Getting Started – (deployment Part 1 – Installing Cassandra)

David — Mon, 26 Mar 2012 15:36:03 +0000

It’s been almost a month since I started the Apache Cassandra investigation, and now it’s time to move into a production stance. Some of these steps will differ from the original steps documented here in my blog. Later this week I will go back and amend those posts to point at this post as the [...]

Inserting and Reading data from a Cassandra Cluster

David — Mon, 19 Mar 2012 16:15:50 +0000

Rubber meeting the road. Time to insert some column families, then some data and finally pull it back off the stack.

First off, the keyspace was already defined, so I’m going to simply list it’s structure:

[default@unknown] describe ip_store; Keyspace: ip_store: Replication Strategy: org.apache.cassandra.locator.SimpleStrategy Durable Writes: true Options: [replication_factor:2]

With a keyspace ready [...]

Drop keyspace using Cassandra Cli

David — Sun, 18 Mar 2012 17:53:17 +0000

Dropping a an entire keyspace using the cassandra-cli is exceptionally simple.

First, access your cluster using the cli. I have an alias in my .bash_profile so I only need to type ‘cass’ to access the clid. In an attempt to be helpful though, I shall show the full command syntax for my environment. Your host [...]

Rare View – 7 US Carriers in one photo

David — Sat, 17 Mar 2012 20:06:36 +0000

You won’t see this any time soon, and possibly never again. 7 US Super Carriers in port together, in one photograph.

This is a stitch of 4 photos taken on 3-March-2012 of Naval Base Kitsap, showing 7 of the world’s largest warships in port at the same time.

On the left, are some of the [...]

Cassandra – Running some simple tests, including a multi-get strategy.

David — Wed, 14 Mar 2012 19:00:26 +0000

PREV: Re-Configuring an Empty Cassandra Cluster

Time for the rubber to meet the road. Get some data loaded and validate the theoretical concepts garnered from the documentation consumed.

This is an record example (IP’s have been changed to protect the clueless):

ip_key: 1598595809 ip: 10.2.162.225 prop_id: 1033 property: Bad Stuff threat: 1 attribute: suspicious meta: [...]

Re-Configuring an Empty Cassandra Cluster

David — Mon, 12 Mar 2012 21:16:31 +0000

PREV: Setting up a Java build env to prepare for Cassandra development

After doing more research, I decided the Ordered Partitioning was not going to buy me anything but a lop-sided distribution. Looking at this (it’s a case of IP distributions, not hostnames as originally envisioned, that will be a later evaluation).

I’d have 3 [...]

Setting up a Java build env to prepare for Cassandra development

David — Sat, 03 Mar 2012 17:40:40 +0000

Getting it all ready… PREV: Cassandra and Big Data – building a single-node “cluster”

First, I wanted to see how much of a system footprint 3 instances of Cassandra had on this little system. Here you can see the 3 instances patiently waiting for something todo. Sitting idle for about 24 hours (note, TIME+ is [...]

Cassandra and Big Data – building a single-node “cluster”

David — Fri, 02 Mar 2012 20:42:25 +0000

Cassandra – Getting off the ground. Continuation of post: Apache Cassandra Project – processing “Big Data”

While researching a project on Big Data services, I knew that I’d need a multi-node cluster to experiment with, but a pile of hardware was not immediately available.

Using the VERY helpful book Cassandra High Performance Cookbook I [...]