Installing Cassandra on Mac OS X


I’ve recently posted some more tips on using Cassandra on Mac OSX: Cassandra on Mac

If you don’t already have homebrew then install it from here.

Then it as simple as:

brew install cassandra

This doesn’t install the python driver for the cqlsh command line tool. To do this install it first install python if you haven’t got it already:

brew install python

This should have also installed pip – the python package manager – so you can then install the cql python module:

pip install cql

Now try and start cqlsh

You might get this:

Python CQL driver not installed, or not on PYTHONPATH.
You might try “easy_install cql”.

One second didn’t I just install the cql module?

This could be because the Python in your path is the Mac OS X version. Not the version you installed with home brew that has cql. I fixed this by adding /usr/local/bin to the start of my PATH as that is where the brew Python executable lives:

export PATH=/usr/local/bin/:$PATH

Unless you’ve started cassandra the next time you try cqlsh you’ll get:

cqlsh
Connection error: Could not connect to localhost:9160

Now if you do a brew info on cassandra:

brew info cassandra

To have launchd start cassandra at login:
ln -sfv /usr/local/opt/cassandra/*.plist ~/Library/LaunchAgents
Then to load cassandra now:
launchctl load ~/Library/LaunchAgents/homebrew.mxcl.cassandra.plist

Unless you are going to use cassandra a lot I wouldn’t set it to load on startup as it does use a reasonable amount of memory. Instead to just start it off:

launchctl load /usr/local/opt/cassandra/homebrew.mxcl.cassandra.plist

Finally cqlsh should connect to cassandra:

cqlsh
Connected to Test Cluster at localhost:9160.
[cqlsh 3.0.2 | Cassandra 1.2.5 | CQL spec 3.0.0 | Thrift protocol 19.36.0]
Use HELP for help.
cqlsh>

Or if you prefer the older cassandra-cli interface to cassandra:

cassandra-cli
Connected to: “Test Cluster” on 127.0.0.1/9160
Welcome to Cassandra CLI version 1.2.5

Type ‘help;’ or ‘?’ for help.
Type ‘quit;’ or ‘exit;’ to quit.

[default@unknown

All done.

 

Copy from http://christopher-batey.blogspot.fr/2013/05/installing-cassandra-on-mac-os-x.html

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