4 ms·
things are changing recently in aws, but few years ago R-family instances had one of the fastest uplink to EBS. for example only the larges M4 instance (m4.16xl
by aPoCoMiLogin 2y ago
things are changing recently in aws, but few years ago R-family instances had one of the fastest uplink to EBS. for example only the larges M4 instance (m4.16xlarge) has 10gbps uplink, versus R5b where it starts from 10gbps (for the lowest tier) and ends on 60gbps @ 260k IOPS. you can very easily choke EBS with DB.
EDIT: only newer C instances have comparable uplink to EBS, C5 or C4 (and some C6) starts from ~4.7gbps. just compare the EBS bandwidth column in https://aws.amazon.com/ec2/instance-types/ https://aws.amazon.com/ec2/instance-types/
- sgarland 2y agoThe other fun thing about AWS instances is that the network uplink speed isn’t always what’s advertised. There is of course the “Up to X Gbps” levels (30 minutes of rated speed guaranteed every 24 hours), but there are also other limits, like cross-region speed being capped at 50% of rated capacity. This rarely matters until it does, like if you’re setting up an active-active DB across regions. Then it’s a fun surprise.