Introduction

This project deals with the performance analysis of MongoDB in a single node and in a cluster

MongoDB

MongoDB is a document oriented and NoSQL database.

Running the Project

Importing the project into eclipse.

1. In Eclipse go to File -> Import.
2. Select Existing Projects into Workspace.
3. Select the project location on the hardrive.
4. Click Finish to perform the import.

Installing MongoDB on a single Node

To install follow the steps mentioned here

Creating a cluster

Steps in creating a cluster

1.Create config server

2.Connect master to config server

3.Create Shards

4.Add shards in master

1 Creating a config server

1.Install mongodb

2.sudo mkdir /data/configdb

3.sudo chown mongo /data/configdb

4.mongod --configsvr --dbpath /data/configdb --port 25020

If port is in use sudo service mongod stop sudo mongod

2 Connecting Master to Config servers

Open a terminal (This is the first terminal in Master)

mongos --configdb 172.50.88.60:25020,172.50.88.12:25020,172.50.57:25020 --port 27020 mongos --configdb 172.50.88.60:25020 --port 27020

• I was able to add only one config server due to time sync problem in the systems.
• 25020 is the port in the config servers that will be waiting for the connection (remember we used mongod --configsvr --dbpath /data/configdb --port 25020 to start config server) --port 27020 is the port through which you want your master to connect through.

3 Creating Shards

Create /data/db Give permissions: sudo chown mongo /data/db mongod -shardsvr

Shard server waits at port 27018 by default Created 3 shards and same steps must be repeated in each shard http://docs.mongodb.org/manual/tutorial/deploy-config-servers/

4 Adding shards in master

1. Open the terminal in the master (This is the second terminal in the master) and type mongo 172.50.88.46:27020/admin

2. To see all the databases:

         mongos> show dbs 
         admin   (empty)
         config  0.016GB
   

3. In order to see status (to know what are the shards,balancers etc) type: sh.status()

         mongos>sh.status()
        --- Sharding Status --- 
        sharding version: {
          "_id" : 1,
          "minCompatibleVersion" : 5,
       	"currentVersion" : 6,
      	"clusterId" : ObjectId("5608748c72b2a03e98f126e2")
        }
        shards:
        balancer:
      	Currently enabled:  yes
       	Currently running:  no
       	Failed balancer rounds in last 5 attempts:  0
       	Migration Results for the last 24 hours: 
     		No recent migrations
        databases:
          {  "_id" : "admin",  "partitioned" : false,  "primary" : "config" }
   

4. Intially there will be no shards. So, to add shards

        mongos> sh.addShard("172.50.88.12:27018")
       { "shardAdded" : "shard0000", "ok" : 1 }
   
       mongos> sh.addShard("172.50.88.57:27018")
       { "shardAdded" : "shard0001", "ok" : 1 }
   
       mongos> sh.addShard("172.50.88.48:27018")
       { "shardAdded" : "shard0002", "ok" : 1 }