AWS: RAID 0 Configuration on EBS Volumes

Amazon Web Services EBS Volumes provides the block level storage volumes of Amazon EC2 instances. EBS volumes are highly available and reliable storage volumes that can be attached to the EC2 instances of the same Availability Zone over AWS internal network. Elastic Block Storage (EBS) is a storage service that is backed by network-connected block storage. So IOPS performance of an EBS volume is measured by the network throughput between the instance and EBS volume.

Two kinds of EBS volumes available

Standard Volumes offer cost-effective storage and can deliver approximately 100 IOPS on average, or burst of hundreds of IOPS. Standard Volumes size can range between 1 GB to 1 TB.

Provisioned IOPS (PIOPS) Volumes are designed for heavy I/O intensive workloads like databases and consistent high I/O throughput. You can specify an IOPS rate when you create the volume. PIOPS Volumes size can range between 10 GB and 1 TB.

The Standard or Provisioned IOPS Volumes I/O performance will depend on the Volume Size and Instance Type.

RAID on EBS Volumes

To get both a faster I/O performance and more than 1TB of volume sizes, you can create a RAID 0 striping using more than one EBS volume.

Advantage: When we perform the RAID 0 Striping of multiple volumes, IOPS are distributed among the volumes of a stripe. If you add another volume to RAID 0, you get the straight addition of IOPS throughput of that volume and additional volume size.

To take advantage of the RAID 0 striping, the instance type should support the High Networking Performance (like m3.xlarge, c3.2xlarge, r3.2xlarge, etc.).

Disadvantage: Loss of a single volume results in a complete data loss.

To avoid the data loss, we should take Snapshots of the RAID volumes frequently, and suspend the writes while taking the snapshot to ensure data integrity and reliability.

Here we will discuss on how to configure the RAID 0 Striping on 2 EBS volumes of several Linux machines. You can expand this to any number of volumes as per your requirements.

Create RAID Configuration

  1. Create the two EBS volumes with a size of 5 GB and attach them to the Amazon Linux Instance.
  2. Create a RAID 0 striped array using the two attached volumes:
    mdadm –create /dev/md0 –level=0 –level=stripe –raid-devices=2 /dev/xvdc /dev/xvdd
    (Assuming the 2 EBS volumes are attached as /dev/xvdc and /dev/xvdd respectively)
  3. Format the raid volume with your favorite file system:
    mkfs.ext4 /dev/md0
  4. Mount it on a temporary directory:
    mount /dev/md0 /srv/raid0
  5. Create some dummy data on /srv/raid0 directory:
    dd if=/dev/zero of=file1 bs=1024 count=65530 (run it about 10 times)
    It will fill 9GB of information onto the RAID meta device. Both the volumes contains data, given that each volume size is 5 GB.

Snapshot RAID volumes

  1. Create snapshots of the two volumes after suspending writes on those volumes.

Restore RAID Volumes

  1. Create the new EBS volumes from the snapshots we have created before.
  2. Launch an EC2 instance of either Amazon Linux or CentOS and attach the newly created EBS volumes.
  3. You can see the RAID meta device is created automatically by the OS itself. Use the fdisk -l command to check it out. Can you mount on a temporary mount point and verify whether 9GB of data is available or not?
  4. Now, launch an EC2 instance of Ubuntu and attach the newly created EBS volumes.
  5. Run the fdisk –l command and verify whether the RAID meta device created automatically by the OS itself. If not, run the following command to create the RAID meta device
    madam –assemble /dev/md0 /dev/xvdc /dev/xvdd
  6. Now you can see a meta device with the name /dev/md0. You can mount it and check its content.

Hope this article will help you to manage the RAID configuration on EBS volumes to gain the maximum IOPS.

Avatar

Written by

Praveen Kumar Muppala

I have strong experience on Multiple Unix/Linux flavours, LAMP Stack, Monitoring Systems, Database, NoSQL. I love to explore the new concepts/services in Cloud Computing World. I have written 4 certifications in different flavours of Linux/Unix.


Related Posts

Amanda Cross
Amanda Cross
— April 9, 2021

New Content: Platforms, Programming, and DevOps – Something for Everyone

This month our team of expert certification specialists released three new or updated learning paths, 16 courses, 13 hands-on labs, and four lab challenges! New content on Cloud Academy You can always visit our Content Roadmap to see what’s just released as well as what’s coming soon....

Read more
  • alibaba
  • AWS
  • Azure
  • DevOps
  • Google Cloud Platform
  • programming
  • Security
Luca Casartelli
Luca Casartelli
— March 31, 2021

Mastering AWS Organizations Service Control Policies

Service Control Policies (SCPs) are IAM-like policies to manage permissions in AWS Organizations. SCPs restrict the actions allowed for accounts within the organization making each one of them compliant with your guidelines. SCPs are not meant to grant permissions; you should consider ...

Read more
  • AWS
  • Organizations
  • SCP
Amanda Cross
Amanda Cross
— March 12, 2021

New Content: Focus on DevOps and Programming Content this Month

This month our team of expert certification specialists released 12 new or updated learning paths, 15 courses, 25 hands-on labs, and four lab challenges! New content on Cloud Academy You can always visit our Content Roadmap to see what’s just released as well as what’s coming soon. Ja...

Read more
  • alibaba
  • AWS
  • Azure
  • DevOps
  • Google Cloud Platform
  • programming
Amanda Cross
Amanda Cross
— February 12, 2021

New Content: Get Ready for the CISM Cert Exam & Learn About Alibaba, Plus All the AWS, GCP, and Azure Courses You Know You Can Count On

This month our team of intrepid certification specialists released five learning paths, seven courses, 19 hands-on labs, and three lab challenges!  One particularly interesting new learning path is Certified Information Security Manager (CISM) Foundations. After completing this learn...

Read more
  • alibaba
  • AWS
  • Azure
  • cism
  • DevOps
  • Google Cloud Platform
  • programming
Avatar
Cloud Academy Team
— January 31, 2021

Which Certifications Should I Get?

The old AWS slogan, “Cloud is the new normal” is indeed a reality today. Really, cloud has been the new normal for a while now and getting credentials has become an increasingly effective way to quickly showcase your abilities to recruiters and companies. With all that in mind, the s...

Read more
  • AWS
  • Azure
  • Certifications
  • Cloud Computing
  • Google Cloud Platform
Avatar
Andrew Larkin
— January 31, 2021

The 12 AWS Certifications: Which is Right for You and Your Team?

As companies increasingly shift workloads to the public cloud, cloud computing has moved from a nice-to-have to a core competency in the enterprise. This shift requires a new set of skills to design, deploy, and manage applications in cloud computing. As the market leader and most ma...

Read more
  • AWS
  • AWS Certifications
Avatar
Stuart Scott
— January 29, 2021

AWS Certified Solutions Architect Associate: A Study Guide

Want to take a really impactful step in your technical career? Explore the AWS Solutions Architect Associate certificate. Its new version (SAA-C02) was released on March 23, 2020. The AWS Solutions Architect - Associate Certification (or Sol Arch Associate for short) offers some ...

Read more
  • AWS
  • AWS Certifications
  • AWS Certified Solutions Architect Associate
Amanda Cross
Amanda Cross
— January 7, 2021

New Content: AWS Terraform, Java Programming Lab Challenges, Azure DP-900 & DP-300 Certification Exam Prep, Plus Plenty More Amazon, Google, Microsoft, and Big Data Courses

This month our Content Team continues building the catalog of courses for everyone learning about AWS, GCP, and Microsoft Azure. In addition, this month’s updates include several Java programming lab challenges and a couple of courses on big data. In total, we released five new learning...

Read more
  • AWS
  • Azure
  • DevOps
  • Google Cloud Platform
  • Machine Learning
  • programming
Avatar
Stuart Scott
— December 17, 2020

Where Should You Be Focusing Your AWS Security Efforts?

Another day, another re:Invent session! This time I listened to Stephen Schmidt’s session, “AWS Security: Where we've been, where we're going.” Amongst covering the highlights of AWS security during 2020, a number of newly added AWS features/services were discussed, including: AWS Audit...

Read more
  • AWS
  • AWS re:Invent
  • cloud security
Joe Nemer
Joe Nemer
— December 4, 2020

AWS re:Invent: 2020 Keynote Top Highlights and More

We’ve gotten through the first five days of the special all-virtual 2020 edition of AWS re:Invent. It’s always a really exciting time for practitioners in the field to see what features and services AWS has cooked up for the year ahead.  This year’s conference is a marathon and not a...

Read more
  • AWS
  • AWS Glue Elastic Views
  • AWS re:Invent
Bryony Harrower
Bryony Harrower
— November 6, 2020

WARNING: Great Cloud Content Ahead

At Cloud Academy, content is at the heart of what we do. We work with the world’s leading cloud and operations teams to develop video courses and learning paths that accelerate teams and drive digital transformation. First and foremost, we listen to our customers’ needs and we stay ahea...

Read more
  • AWS
  • Azure
  • content roadmap
  • GCP
Joe Nemer
Joe Nemer
— October 25, 2020

Excelling in AWS, Azure, and Beyond – How Danut Prisacaru Prepares for the Future

Meet Danut Prisacaru. Danut has been a Software Architect for the past 10 years and has been involved in Software Engineering for 30 years. He’s passionate about software and learning, and jokes that coding is basically the only thing he can do well (!). We think his enthusiasm shines t...

Read more
  • AWS
  • careers
  • champions
  • upskilling