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Working with /mnt size on EY Cloud

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Working with /mnt size on EY Cloud

When you’re booting a new environment or adding a new cluster to a specific environment, you might want to specify a custom size for the /mnt partition or you can ignore those fields. If you specify a value on the respective field for /mnt size, the system will take such value and assign it to the /mnt partition. Otherwise, if you don’t specify a value, the system will assign 25GB.

Prerequisite:  You need the username and password for your EY Cloud account. If you do not already have this, submit a request with Engine Yard Support.

To determine if the /mnt default size works

  1. Log in to EY Cloud at http://cloud.engineyard.com.

  2. Create a new environment with the following data:

    • Todo App

    • Production

    • Passenger 4

    • Stable-v4

    • Ruby 2.1

    • RubyGems 2.4.8

    • PostgreSQL 9.4

    • US East (N. Virginia)

    • Staging Setup

  3. Wait for chef to completion.

  4. Verify chef runs to completion and app works as expected.

  5. SSH into each instance and check the /mnt size (df -h /mnt).

  6. Make sure the /mnt size is 25GB for all instances.

To determine if the /mnt custom size works

  1. Log in to EY Cloud at http://cloud.engineyard.com.

  2. Create a new environment with the following data:

    • Todo App

    • Production

    • Passenger 4

    • Stable-v4

    • Ruby 2.1

    • RubyGems 2.4.8

    • PostgreSQL 9.4

    • US East (N. Virginia)

    • Custom Setup

    • 1 App Instance (default size)

      • /data volume: 20GB
      • /mnt size: 10GB

    • 1 DB Instance (default size)

      • /data volume: 150GB
      • /mnt size: none (leave it in blank)

    • 1 Utility Instance (default size)

      • name: up to you
      • /data volume size: 15GB
      • /mnt size: 1GB

  3. Wait for chef to completion.

  4. Verify chef runs to completion and app works as expected.

  5. SSH into each instance and check the /mnt size (df -h /mnt).

  6. Make sure the /mnt size is 10GB for app, 25GB for DB and 1GB for utility
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Comments

  • Avatar
    Naftali Marcus

    It would be helpful to have a short explanation of what /mnt is used for and perhaps when I'd want to customize it.

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    Benjamin Borowski

    +1 to Naftali's comment. What are the min/maxes on these values? Does it cost more to increase the values? Save money by decreasing?

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