Lecstor's Blog

MongoDB Upgrade 2.4 to 2.6 in Debian

May 13, 2014

When upgrading to the latest and greatest MongoDB (2.6) the first thing you have to do is run a check on your databases. Specifically the upgrade docs say:

To begin the upgrade procedure, connect a 2.6 mongo shell to your MongoDB 2.4 mongos or mongod and run the db.upgradeCheckAllDBs() to check your data set for compatibility.

Tightly constrained by the box, I wondered how I could install a 2.6 mongo shell on my Debian system without upgrading the whole shebang.. turns out there’s no need.. just download the tar version of MongoDB and run the shell straight from there..

$ curl -O http://downloads.mongodb.org/linux/mongodb-linux-x86_64-2.6.1.tgz
$ tar -zxvf mongodb-linux-x86_64-2.6.1.tgz
$ ./mongodb-linux-x86_64-2.6.1/bin/mongo

to run the check, you also need to be using the admin database, so..

> use admin
switched to db admin
> db.upgradeCheckAllDBs()

Checking database mydb1

Checking collection mydb1.coll1

Checking collection mydb1.coll2

Checking database mydb2

Checking collection mydb2.coll1

Checking collection mydb2.coll2

Everything is ready for the upgrade!

Jason Galea

Written by Jason Galea from Cairns, Australia.

Senior Software Engineer looking for the next big challenge.
Full Stack developer specialising in React and NodeJS.

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