EBS Volume POC for Neo4j

•  Prerequisite

  OS - Linux 

  Find all the steps for EBS volume poc for Neo4j

  
  

  
  

   To use AWS storage volume for neo4j graph database

  Step 1:

  • Create an EBC Volume: (Type GP2)

  • EBS volume should be in exact same region and sub region as the instance you wish to mount.

  • Reference Link : http://docs.aws.amazon.com/AWSEC2/latest/UserGuide/ebs-creating-volume.html

  Step 2:

  • Attach EBS Volume to Instance:

  • From volumes section - attach the volume to the instance

  • Reference Link :http://docs.aws.amazon.com/AWSEC2/latest/UserGuide/ebs-attaching-volume.html

  Step 3:

  • Now we need to mount the drive on that instance:

    Login to your ec2 instance and list the available disks using the following command

    1. Lsblk

              Check if the volume has any data using the following command.

                      sudo file -s /dev/xvdf

              If the above command output shows “/dev/xvdf: data”, it means your volume is empty.

              Format the volume to ext4 filesystem  using the following command

                    sudo mkfs -t ext4 /dev/xvdf

              Create a directory of your choice to mount our new ext4 volume. I am using the name “newvolume”

                    sudo mkdir /newvolume

             Mount the volume to “newvolume” directory using the following command.

                    sudo mount /dev/xvdf /newvolume/

              cd into newvolume directory and check the disk space for confirming the volume mount.

                    cd /newvolume

                    df -h .

  Step 4: 

  • Now we need to change the neo4j.conf file to point to new mounted space
    1. Stop neo4j
    2. Uncomment line “dbms.directories.data=data”
    3. Change to “dbms.directories.data=/newvolume/data”

  Step 5: 

  • Now verify neo4j
    1. Start neo4j
    2. Create nodes and verify data

  Step 6:

  • Unmount
    1. umount /dev/xvdf

  Step 7:

  • Detach EBS volume
    1. Go to EC2 Volume section
    2. Select the volume
    3. Under Action select detach, if that does not works go for Force detach

  Step 8:

  • Now increase the size
    1. Go to EC2 Volume section
    2. Resize the volume by modifying the volume to desired levels

  Step 9:

  • Attach the volume to the new fresh instance
    1. From volumes section - attach the volume to the instance.
    2. Reference Link : http://docs.aws.amazon.com/AWSEC2/latest/UserGuide/ebs-attaching-volume.html

  Step 10:

  • Mount the volume to newly attached instance
    1. Follow step 3 above

  Step 11:

  • Neo4j conf updates and data verification
    1. Follow steps 5 and 6

  
  

  
  

  
  

   Extend AWS storage volume for neo4j graph database

  Step 1:

  • To make the extend size of EBS volume to be useful we need to resize it with formatting
    1. sudo resize2fs /dev/xvdf

  Step 2:

  • EBS Automount On Reboot
    1. Back up the /etc/fstab file.
    2. sudo cp /etc/fstab /etc/fstab.bak
    3. Open /etc/fstab file and make an entry in the following format.
    4. device_name mount_point file_system_type fs_mntops fs_freq fs_passno

  
  

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