Derek Kraan's blog

Learning Resources Blogs & Podcasts
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I have written a few posts already, but decided to start a thread here to keep track of the new ones.

Here’s the one I posted today: Avoiding OTP Supervisor performance pitfalls

It’s inspired by a recent discussion on the elixir-lang-core mailing list (linked to from within the blog post).

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It won’t let me read it without a login/account :frowning:

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The link was wrong, oops! I fixed it, you should be able to read it now!

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thanks!

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Nice article! I learned something new today.

This tidbit was especially interesting to me:

Bonus: handle_continue/2 is also useful any time you want to do some additional work after replying to a message, for example in a handle_call/3 callback.

I think that could be a useful pattern for some GenServer’s

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handle_continue/2 is very new and was just recently added to OTP. It replaces the old ‘throw yourself a message’ pattern more reliably as it runs ‘before’ other possible pending messages, which makes it fantastic for handling after an init/1 callback. :slight_smile:

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Implementing Connection Draining in Phoenix (or any library that uses Ranch!)

Link to the mini-library itself

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Why should every process be supervised?

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What’s new in Horde 0.5.0?

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Introducing MerkleMap: the new library powering Horde’s improved performance.

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Great post, and thanks for the contribution!

I’m wondering: what are the requirements for the hash function? Would erlang:phash2 work too? What’s the advantage of Murmur over others?

Cheers

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@tangui It needs to be able to hash any Erlang term, that’s the only requirement. I picked murmur because it did this out of the box (although using :erlang.term_to_binary should make any hash function usable).

If you know something better (faster) then feel free to submit a PR :slight_smile:

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Where do I put startup code in Elixir?

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I wrote about Highlander, a micro-library for running a single globally unique process in your Erlang cluster!

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Horde’s got some big changes coming in 0.8.0, click here to read about it!

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Nice article!

i have learned something new today

Thanks for sharing

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We recently improved EventStore’s performance by 2x to 4x+ (depending on network conditions) and blogged about it here: https://moosecode.nl/blog/event_store_optimized

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