EBS vs EFS read and write latencies

Question

I am storing users' code in file system, at present EBS in AWS. I am looking improving the availability and want to reduce the chances of outage due to EBS going down. EFS appears to be a reasonable option.

I understand EFS will be slower than EBS and EFS is more expensive than EBS. I want to know, if there is any performance benchmark done to measure the read and write latencies of EFS and comparison with EBS?

Answer 1

This AWS forums thread shows you some of the problems that some customers have had with eFS latency and AWS reaction. Some customers assert they have had 1+ second latency, to which AWS support say that's not normal, they'll investigate.

My current experience in EU-West appears to suggest that for a series of 150,000 small read operations of about 2.5KB each, my EC2<->EFS is maxing out at 200 read ops per second, so we might guess at no more than 1/200th of a second or 5ms for typical effective latency.

I say "effective latency" because that's really reporting a bandwidth, not a latency. I haven't written timing code to measure round-trip latency.

You can improve it by paying for a bigger drive (which includes bigger IOPS in the price) or for reserved IOPS.