# \[ANN\] Aches.1.0.0, Ringo.1.0.0

**URL:** <https://discuss.ocaml.org/t/ann-aches-1-0-0-ringo-1-0-0/10552>\
**Category:** Community\
**Tags:** release, announce\
**Created:** [September 30, 2022, 4:06pm UTC](https://discuss.ocaml.org/t/ann-aches-1-0-0-ringo-1-0-0/10552 "2022-09-30T16:06:08Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![raphael-proust](https://sea2.discourse-cdn.com/flex020/user_avatar/discuss.ocaml.org/raphael-proust/32/415_2.png) [@raphael-proust](https://discuss.ocaml.org/u/raphael-proust)\
**Post date:** [September 30, 2022, 4:06pm UTC](https://discuss.ocaml.org/t/ann-aches-1-0-0-ringo-1-0-0/10552/1 "2022-09-30T16:06:08Z")

</div>

Version 1.0.0 of the Aches and Ringo libraries have just been released.

Aches provide various caches (Sets, Maps) with various policies (FIFO/LIFO, Strong/Weak, etc.). It also makes a distinctions between value caches (caches for in-memory values which are ultimately cleaned by the GC) and resource caches (caches which model resources such as file-descriptors which need some cleaning-up), providing different mechanisms for retrieval to help ensure all resources are properly cleaned as needed.

Ringo is a support library for Aches which may also be of interest to other developers. It provides doubly-linked lists and rings.

Finally, the Aches-lwt library provides caches for values which can take some time to obtain, in the form of Lwt promises — for instance, the content of a file stored on a remote machine.

This is the first stable release of Ringo, Aches, and Aches-lwt; future versions will adhere to the semantic versioning scheme.

The libraries are used within the [Tezos](https://gitlab.com/tezos/tezos) project. They are hosted on a single repository on [Gitlab](https://gitlab.com/nomadic-labs/ringo) under the MIT License. They are distributed on `opam`.