;·) About time for BohemiaX.
Similar to Redis, we could either work with expiry dates or limit the cache to a maximum number of entries (and drop the ones with the oldest access time).
On Sat, May 7, 2022 at 5:30 PM Andy Bunce bunce.andy@gmail.com wrote:
"There are only two hard things in Computer Science: cache invalidation and naming things." [1]
This topic combines the two ;) As for alternative names I offer: the exotic: entrepot, the industrial: kvstore, the bohemian: stash. Personally I think cache is fine.
I have sometimes thought of using BaseX and Redis together managed by docker-compose. I like the data structures [3] and the concept of 'variables' that self destruct after some time [4]
/Andy
[1] https://www.martinfowler.com/bliki/TwoHardThings.html [2] https://en.wikipedia.org/wiki/Entrep%C3%B4t [3] https://redis.io/docs/about/ [4] https://redis.io/commands/expire/
On Fri, 6 May 2022 at 15:26, Christian Grün christian.gruen@gmail.com wrote:
Hi Liam,
What happens on a crash (e.g. power failure)?
If BaseX is shut down gracefully, the data will be stored; otherwise, it might get lost indeed. If the cached data is important, it’s advisable to call cache:write after each update.
In the documentation, I mentioned that the cache will automatically be written to disk at shutdown time. Based on some more feedback I got, I imagine there can be cases in which you simply want to create a temporary cache without making it persistent. I think I’ll change this, and I will only serialize the cache if a cache file already exists on disk (as a result of a previous explicit cache:write call).
E/g/ for the listtle teszt/experiment site i have at www.fromoldbooks.org (and www.fromoldbooks.org/Search/) there's a framework i wrote that calls out to BaseX and keeps a cached result in a separate file, one per query. […]
By reading your reply and the one from Omar, I wonder if the »Cache« is really the best term to describe what the module offers. It’s basically a Main-Memory Key-Value Store that can be made persistent, similar to e.g. Redis. Suggestions for a better name are welcome.
All the best, Christian