Installing MongoDB on AWS EC2 and turning on zlib compression


At this time AWS doesn’t provide an RDS type for MongoDB. So in order to have a MongoDB server on the AWS cloud, you have to install it manually on an EC2 instance.

The full documentation for installing a MongoDB instance on an AWS EC2 can be seen at: Here’s a quick summary though.

First you’ll need to create a Linux EC2 server. Once you have the server created, log in to the machine through secure shell. Drop into root shell using the following command:

sudo su

Next you’ll need to create the repository info for yum to use to download the prebuilt MongoDB packages. You’ll create a file at /etc/yum.repos.d/mongodb-org-3.0.repo:

vi /etc/yum.repos.d/mongodb-org-3.0.repo

And copy/paste the repository:

name=MongoDB Repository

Save and exit from vi. And type in the following command to install:

yum install -y mongodb-org

And that’s it! Now you have MongoDB installed on your EC2.

Next, to turn on compression, you’ll need to edit /etc/mongod.conf

vi /etc/mongod.conf

Scroll down to the “storage” directive, and add in this configuration:

engine: "wiredTiger"
    blockCompressor: "zlib"

Now any collections you create will be compressed with zlib, which provides the best compression currently.

To turn on your MongoDB instance by typing in this command:

service mongod start

And of course you’ll want to custom configure your MongoDB instance (or not). You can find several guides and tutorials to do that online.

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