andriosr

12 ms·

61.
by andriosr 6y ago
Blindly replicating what Google is doing is really problematic, I saw something similar at a few companies. The principles are interesting, but they have to consider each company's reality. Google is putting a lot of marketing money on
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by andriosr 6y ago
Really cool! Interesting to hear that. I thought about diving deep on details, but was concerned it would become too heavy for a blog post to read every week. Will experiment on that.
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by andriosr 6y ago
Really interesting, great feedback, thanks! This is the first issue, so this is very welcome to make sure the following are better. My goal is to actually make it for the a diverse set of companies, this is only the first one. Noted on the
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by andriosr 6y ago
I have a very similar view. But I see more and more companies trying to build a Google-like SRE structure, where the team actually operates more mature services highly critical to the business. Tricky not to become traditional ops teams, bu
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SRE Teams: Hash(sreteams.substack.com)
122 points by andriosr 6y ago|90 comments
66.
by andriosr 6y ago
Interesting take. I think Datomic is a low hanging fruit. A lot of people get excited about it and is fairly easy to do. That being said, I saw quite a few examples of companies migrating from it. Complexity to operate for simple things bei
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Things I Wish I Knew Before Building a Ledger(decimals.substack.com)
1 points by andriosr 6y ago|0 comments
68.
by andriosr 6y ago
Wow, this is very interesting! Will look into it, I have plans to add interests to Sequence at some point, this will be of great help.
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by andriosr 6y ago
Thanks! I have interesting ideas for amortization/interests, maybe they can get added at some point. Yes, the hashes are the ids used for Avoiding double-spending along with dynamodb conditional put. I’m on the phone now, will follow u
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by andriosr 6y ago
just created an issue on Github to keep track of this :)
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by andriosr 6y ago
You're right. Sequence is a ledger API. These tools will give you higher abstractions on top of their internal ledgers. I think you are on the right track. If you want something extremely simple maybe the Ledger CLI [0] is worth lookin
72.
by andriosr 6y ago
It was designed to support multiple DBs. Adding a new adapter should be pretty easy. I will add the first for Datomic in the coming weeks. This should pave the way for the next ones (I will add some docs on this). I really believe on it sup
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by andriosr 6y ago
You're right. DynamoDB is not a relational database. But data in DynamoDB can be relational just as in a regular relational database: https://docs.aws.amazon.com/amazondynamodb/latest/developerg...
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by andriosr 6y ago
Yep. Integers they are: https://news.ycombinator.com/item?id=24435148
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by andriosr 6y ago
Two great points. The amounts are actually integer, the same pattern used by Stripe and others. See it here: https://github.com/decimals/sequence/blob/master/src/decimal... I'm working on enabl
76.
by andriosr 6y ago
Interesting question. No-SQL doesn't mean non-relational. DynamoDB is a relational database. It's up to you on how you design the table to accommodate your relations. This is a great presentation about this: https://you
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by andriosr 6y ago
It maintains double-entry consistency of balances with DynamoDB. I uses DynamoDB (or any No-SQL) conditional puts. You can think of it as a update + where of SQL databases. But infinitely more scalable and available. Here is a piece I wrote
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by andriosr 6y ago
I wrote a piece that touches a bit on the why: https://decimals.substack.com/p/things-i-wish-i-knew-before-... But in a nutshell: availability and scalability. Yes you can achieve this with relational DBs, but it will
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by andriosr 6y ago
Wow, that was a great review, thanks! I agree with most points. There are definitely improvements to be made. This is the first version, I wanted to get it out and start getting feedback sooner. This is my take on each point: For some reaso
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by andriosr 6y ago
Hi everyone, I have been iterating a startup since the start of the year. And I'm using Clojure for everything I do. The first product was a ledger service, but it ended up not fitting well as a managed service. We pivoted to a differe
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Show HN: An open-source financial ledger API written in Clojure(github.com)
125 points by andriosr 6y ago|33 comments
82.
by andriosr 6y ago
Sure. Immutable doesn't mean you can't delete things: > True. And what makes it easy is it's immutability. When you change history in Git, you rewrite it (rebase). But re-writing is only possible if you know every bit of t
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by andriosr 6y ago
I think it's crazy that database updates are still acceptable in the design of systems and databases. Updates are deletes in practice, you lose what was there before. Getting to know how Git and blockchains in general works will help i
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by andriosr 6y ago
True. And what makes it easy is it's immutability. When you change history in Git, you rewrite it (rebase). But re-writing is only possible if you know every bit of the journey up to now. When you have actual updates, history is lost.
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by andriosr 6y ago
Completely agree. These problems should not happen twice, and if they are frequent there is a problem somewhere else. But as you mention, even with the best validations, it can happen sometimes. What processes/tools have you seen work
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by andriosr 6y ago
Nice! This is the best process I can think of. I’ve worked with this model. But then everybody in the team has access to run the scripts, right? In my case a few people had, and with scale they became bottlenecks
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Ask HN: How do you rake production?
3 points by andriosr 6y ago|4 comments
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Building Private Ledgers(decimals.substack.com)
2 points by andriosr 6y ago|0 comments
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by andriosr 6y ago
I prefer 1000x a complex pricing page than having to talk to a sales rep to get the first sense of pricing. Each industry has different aspects of how much value they get from a product, the effort to try to encapsulate these aspects into a
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by andriosr 6y ago
Agreed! I really appreciate Algolia trying to make it simple and transparent. It’s a way better experience than having to talk to a sales rep to get a sense of pricing after 3 calls. We face the same challenge with Decimlas.app, and will be

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