> The problem with CephFS is that in order to work, it needs to have a really performant underlaying infrastructure because it needs to read and write a lot of

> The problem with CephFS is that in order to work, it needs to have a really performant underlaying infrastructure because it needs to read and write a lot of things really fast. If one of the hosts delays writing to the journal, then the rest of the fleet is waiting for that operation alone, and the whole file system is blocked. This could easily have been titled "Why we couldn't use SephFS"