feat: add ashcubdb announcement.

content/blog/announcing-ash-cubdb/index.md

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+title = "Announcing AshCubDB"
+date = "2023-10-02"
+
+[taxonomies]
+tags = ["elixir", "ash", "library", "database", "embedded"]
+
+[extra]
+cover_image = "cub.jpg"
++++
+
+I'm happy to announce the first (useful) release of
+[AshCubDB](https://hex.pm/packages/ash_cubdb) an Ash data layer which allows you
+to back your Ash resources with [CubDB](https://hex.pm/packages/cubdb).
+
+## CubDB
+
+From [the CubDB documentation](https://hexdocs.pm/cubdb/readme.html):
+
+> CubDB is an embedded key-value database for the Elixir language. It is
+> designed for robustness, and for minimal need of resources.
+
+CubDB is an impressive piece of engineering which is widely used by folks
+working on [Nerves](https://nerves-project.org/) projects.  I only learned about
+it earlier this year, but I've been itching to play with it since.
+
+It supports ACID transactions, concurrent reads and writes and is generally
+resistant to data corruption during unexpected shutdowns or crashes.
+
+## Status
+
+`AshCubDB` does not support, not is it currently aiming to support all the many
+many features of other Ash data layers.  It does support the basic CRUD
+operations and filtering.  You can use it today.
+
+There are a few things that I haven't nailed down:
+
+1. How to handle "migrations" when the attributes of a resource change and thus
+   the existing records are now invalid?
+2. How to handle transactions.  CubDB essentially switches to a unit-of-work
+   style structure when in a transaction, with a different API (`CubDB.Tx`).
+3. Should we dynamically start the CubDB processes when we need them (the
+   current solution) or require that apps start them in their own supervision
+   tree?
+
+## Links
+
+- [code.harton.nz/james/ash_cubdb](https://code.harton.nz/james/ash_cubdb)
+- [github.com/jimsynz/ash_cubdb](https://github.com/jimsynz/ash_cubdb)
+- [hex.pm/packages/ash_cubdb](https://hex.pm/packages/ash_cubdb)
+- [hexdocs.pm/ash_cubdb/readme.html](https://hexdocs.pm/ash_cubdb/readme.html)
+- [ash-hq.com](https://ash-hq.com)
+- [Ash Discord](https://discord.gg/NnkhUmkv)