Epic Games Fortnite – Postmortem of Service Outage at 3.4M CCU

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25 points·thezilch··4 comments

Talk about moving parts; mongo, memcached and redis. 3 different "competing" datastores.

I can understand maybe nginx has better memcached integration, redis cluster better, and mongo... well it is js so any dev can use it.

Would be interesting to know how much it cost to get the experts on site. Sad to see that the design it fast; let it break; and market the hell out of if strategy making profit, to the point where you need experts on site.

> 3 different "competing" datastores.

These 3 have very different purposes. That's essentially a cache, a data structure server, and a document database. There are good reasons to have all 3.

Redis and memcached could probably land in the same category. Or at least redis could also fulfill caching needs, most likely.

I agree though. Use the right datastore type for the problems at hand. Which often lends itself to multiple databases.

Where the document database? There 3 cache implementation, and 2 of them with a data structure layer.

To be called a database you should actually have some acid compliance. Otherwise your just a datastore.

But this is a bit of bar banter on a public forum. which recently shown the ugly fact that senior software engineers does not read their reference documentation, but rather just use stackoverflow.

It is 2018 there is solid software(redis included) that can fulfill all 3 needs with one technology stack.

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