This is quite clever. I had tried a simpler version of this a few years back on AWS using LVM cache[1], attached SSD disks (for the cache) and EBS volumes (for

This is quite clever. I had tried a simpler version of this a few years back on AWS using LVM cache[1], attached SSD disks (for the cache) and EBS volumes (for the persistent storage). For our workloads (big data processing with Hadoop/Hive), the performance benefit was not significant, so we dropped it. 1. https://access.redhat.com/documentation/en-us/red_hat_enterprise_linux/6/html/logical_volume_manager_administration/lvm_cache_volume_creation https://access.redhat.com/documentation/en-us/red_hat_enterp...