We're paying ~$1k/month for all our webservers (which is a dozen ECS instances). They're handling about 3,000 requests per second (but that does sometimes massively spike to tens of thousands if not more).
We're paying ~$1k/month for all our tooling servers (so the 150 different test runners, representers, analyzers that are used to check peoples code. There's >=1 of those running every second). Bare in mind, we're running student's code in over 70 languages here. Each is a docker container (often many gb large) - so we pay for HDD too.
The biggest actual cost is the database at $2k/month. We have about 600 queries per second, and around 10MB per second (spiking to 47MB per second) of read throughput. It's an autoscaling database, but AWS determines that it's at the level it needs to be, and if I turn that down, performance suffers (I've tried).
Beyond that, all the other individual services are ~$300/m, so quite small amounts, but for things we rely on (e.g. caching servers, a shared filesystem amongst all those servers, and other things).
$1.2k on tax is also fun.
We're paying ~$1k/month for all our tooling servers (so the 150 different test runners, representers, analyzers that are used to check peoples code. There's >=1 of those running every second). Bare in mind, we're running student's code in over 70 languages here. Each is a docker container (often many gb large) - so we pay for HDD too.
The biggest actual cost is the database at $2k/month. We have about 600 queries per second, and around 10MB per second (spiking to 47MB per second) of read throughput. It's an autoscaling database, but AWS determines that it's at the level it needs to be, and if I turn that down, performance suffers (I've tried).
Beyond that, all the other individual services are ~$300/m, so quite small amounts, but for things we rely on (e.g. caching servers, a shared filesystem amongst all those servers, and other things).
$1.2k on tax is also fun.