can you provide api that i can get Multiple data about cache HOT 3 CLOSED

like mysql:
select * from table limit 1,10;

from cache.

Hello,

Thank you for your comments!

This is an interesting request. I'd like to understand your use-cases and reasons of asking this feature.
This feature sounds as typical I/O patterns for in-memory data storages (e.g. ETS, Redis, ...).
What is the reason to implement this feature as part of caching?

First of all, it requires a different storage strategy for cache elements. We need to compromise O(1) vs O(log N). Fortunately, existed cache implementation has a config option https://github.com/fogfish/cache/blob/master/src/cache.erl#L131

{ok, _} = cache:start_link([{type, ordered_set}]).

This option ensures that keys are sorted alphanumerically within the segments. However, segments are still sorted by time. Therefore, the total ordering is lexicographical + time. Let's assume cache has three segments:

The total key order is aa, ac, bc, cc, ab, ca, bb, ba, cb. Is this ordering schema suitable for your use-cases?

Please aware that cache api provides you an ability to access all ETS tables
https://github.com/fogfish/cache/blob/master/src/cache.erl#L166

cache:i(..., heap)

You can use ETS query api to fetch data.

from cache.

@fogfish
ok,i know what you say!thanks!

from cache.