For use cases -- lots of examples, although it's not needed as often as you think. You can often design around it.
But, there is a reason there was a whole Java library for implementing transactions on the client-side in DDB. Sometimes you really need a transaction!
Jun 15, 2022 • 8 tweets • 2 min read
👋 I did a deep dive on database & distributed system consistency over the last 2 months, and finally got my thoughts together.
High-level points below.
First, there are three different uses of 'consistency' across these areas, and they only vaguely overlap:
1. 'Consistency' as the 'C' in CAP 2. 'Consistency' as the 'C' in ACID 3. Consistency models (think: Jepsen), which is somehow the 'C' from CAP plus the 'I' from ACID (??!)
Feb 12, 2022 • 7 tweets • 4 min read
Good notes from @GergelyOrosz here, and he's right that the economics for individual creators can be tough.
Two notes from me on how the economics can be better than his rough calculations:
1) Going *straight* content can be hard (not impossible! There are examples of folks making all / most of their income from content -- @wesbos, @kentcdodds, @adamwathan).
But combining content with other, related income streams can be really effective.
Mar 30, 2021 • 10 tweets • 4 min read
1/ Last week, I did a presentation for a client that included (among other things), a discussion of DynamoDB and MongoDB.
Operational concerns aside, I think the biggest difference is this:
DynamoDB is authoritarian, while MongoDB is libertarian.
2/ If you've watched my talks, you've seen a slide like this. I like to discuss how DynamoDB partitions work and how they help keep DynamoDB performance consistent as your application scales.
For more, see my reinvent talk here:
Jul 16, 2020 • 9 tweets • 3 min read
I have a new chart I've been showing in my DynamoDB training and talks recently.
It's about DynamoDB performance, and there are two key points I want folks to understand:
1. DynamoDB is fast (not blazing fast! but definitely not slow)
2. DynamoDB perf is consistent
(cont.)
Point 1: 'DynamoDB is fast.'
You'll get single-digit response times (at the server) from DynamoDB.
This is nice! Your users will appreciate that.
(cont.)
Jul 8, 2020 • 5 tweets • 2 min read
Franck Pachot (@FranckPachot ) is an RDBMS expert and wrote a really nice response to an earlier post I wrote about how DynamoDB scales where relational databases don't. I highly recommend reading it.
1. I'll trust Franck on the time complexity point for joins. He knows waaay more about this (and buffers & pages) than I do, so I'm a bit out over my skis there.
That said, I do think the general point about NoSQL (and DynamoDB in particular) + scalability hold up
(cont.)
Aug 11, 2018 • 10 tweets • 3 min read
Smart, fair thoughts here by @ryan_marsh about the Serverless Framework plugin system. Thread coming with my thoughts on good (and less good) uses of @goserverless plugins.
1) Extending the Framework's DSL to easily add more resources to your CloudFormation template. Example here is @acloudguru's Alerts plugin to add monitoring to your service.
