(Networking) Success!

With some help from my former colleague and current classmate Pete Griffiths, I managed to remote logon to MongoDB installed on the ‘clear’ Pi (with the 32GB SD Card & successful GitHub installation) via MongoVue installed on the Win7 laptop.

This was a breakthrough as I’m now confident my cluster will be able to see each device – which then allows me to begin spreading data across nodes aka sharding.

Node(s) visible

Node(s) visible

Here you can see a connection to ‘clear’ has been created. Clear has been given a fixed IP address of, yellow has been given a static IP address of, Red .4 etc etc. MongoVue is running on my laptop, but able to connect to remote devices in the network switch.

You can see the dummy document I entered into a new collection!


Clear is plugged in to the TP-Link switch on port 3 (lit up; laptop in port 1).

I’m just waiting for my other 4 32GB cards to come in the post and then I should be able to install Mongo on the remaining R Pi’s then hook everything together into the network switch.

We also linuxed the old Dell using Unetbootin, removing WinXP which is incompatible with MongoDB. Raspbian is crafted for the puny ARM processor, so I had to install Debian, which I believe(?) is from the same Linux family, so I hope has more or less the same functionality and syntax,

Also created virtual machines on the laptop using Virtual Box. I think I’ll need these to create virtual ‘config servers’ which mongodb requires for coordination. Config servers store all cluster metadata, most importantly, the mapping from chunks to shards:
Config servers maintain the shard metadata in a config database. The config database stores the relationship between chunks and where they reside within a sharded cluster. Without a config database, the mongos instances would be unable to route queries or write operations within the cluster.

– see more here

Divide and conquer


Looks interesting, downloading…


Seems a much nicer way to interact with Mongo rather than the shell. Also has a nice map/reduce wizard, which should come in handy later.

And profiling, with 3 options
0 – no logging
1 – log slow operations [specify time ss]
2 – log all operations

Again, should come in handy as I add nodes and build out the cluster.