‫Durability committee transactions must be persistent in a durable nonvolatile storage.
‫That's what I mean.
‫If I were right and committed a transaction, it better stay there.
‫When it's when when I lost power, if I committed a transaction, I lost power and that it was shut
‫down.
‫If I started, the value better be that that's what durable durable means.
‫Right.
‫So Red S, for example, is not a durable database.
‫It's a in-memory database.
‫Memcache DNA memory database is not durable and it's up to you if your caching stuff, you're just doing
‫stuff for caching, you might really don't care about being durable.
‫Right.
‫So a lot of databases stock these for property and just starting hacking one of them out and then creating
‫a brand new database out of it.
‫So let's talk the durability out.
‫And that just created this in-memory database thing.
‫They have, I think, persistence.
‫I didn't work very closely with the artist, but in memory they have persistence model.
‫I think Cassandra and Mongo DB decided to say, you know what, I don't need consistency.
‫I'm going to give you consistency when you write your query.
‫Right.
‫But you don't is because then you don't have a schema to begin with.
‫Right.
‫There is a lot of things that God relax, not only just the consistency part of it.
‫So the schema nor referential integrity.
‫You don't get indexes, secondary indexes, all that stuff.
‫You don't get any of that.
‫Yeah.
‫So really, that's probably another topic now, equal versus equal, but that's a long video.
‫You made it.
‫Thank you so much for watching.
‫Until the end.
‫All right, guys, I'm going to see the next one.
‫You guys, they are awesome.