7. Configuring Storage for Vector on AWS : Tuning Volume Layout for Performance : Instance Store Volumes
 
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Instance Store Volumes
If you have decided to use instance store volumes, you may choose between SSDs and HDDs. Storage-optimized instances provide HDD- and SSD-based storage options, and Vector works well with both. HDDs provide denser storage per node and are slightly less costly per GB than equivalent SSD options.
To add instance store volumes to your instance, see https://docs.aws.amazon.com/AWSEC2/latest/UserGuide/add-instance-store-volumes.html#adding-instance-storage-instance.
After adding the volumes to your instance, they will be available as devices to the operating system, but you must format and mount them. For more information about how to do this for EBS volumes, see https://docs.aws.amazon.com/AWSEC2/latest/UserGuide/ebs-using-volumes.html.
To get the best performance from instance store volumes, you may want to create a RAID array, which not only provides redundancy but also increased performance. For instructions on how to create a RAID array, see https://docs.aws.amazon.com/AWSEC2/latest/UserGuide/raid-config.html#linux-raid. Although that documentation is meant for EBS volumes, it applies to instance store volumes as well. It explains how to create the array from the devices that represent the volumes, format them, and mount them.
After setting up the array and mounting it, it will appear as a standard mounted device with a file system to Vector. You may proceed with Vector configuration.