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io1 volumes are expensive and not nearly as performant as local nvme SSD's.

io1's top out at 32K PIOPS per volume and a 32K PIOPS 225GB volume would cost around 2100/month.

But an entire c5d.2xlarge with 225GB of local SSD will only cost around $283/month, and (based on i3 performance) will give you around 180K write IOPS.

Redis flash, memcached with its external storage shim, ScyllaDB, Aerospike, RocksDB, EVCache for Netflix perhaps...there's a bunch of em

Network disks really are terrible in comparison, even the super charged expensive ones (io volumes).

Local SSD is just orders of magnitude faster if you need a fast place to put temporary (or replicated) data.

It was a harebrained idea to not distinguish between local vs remote data needs. For a time Amazon pretended they could overcome physics.

Aerospike

caches

docker layer caches

jenkins workspaces