Live data from Hacker News

Datomic is Free

blog.datomic.com

401–410 of 436 posts

Re: Datomic is Free

#402

Earlier quoted context omitted.

Is this not the case already? Database drivers (or just your application code) are allowed to cache results if they like. The problem is cache invalidation.

Caches aren't the same. In the shard-in-memory case, the shard is the thing serving the queries, meaning it's not a cache it _is_ the live data.

Understood. For a single-node or read-only system it sounds fine, but then there are a variety of ways to solve that (e.g. a preloaded in-memory sqlite).

Re: Datomic is Free

#404

Earlier quoted context omitted.

If it's in memory you must live with the fact that it might be gone at any moment though.

Hence "the data persistence part."

This sounds like a write-back / write-through cache with extra terminology. What's the difference?
Post reply on HN