writes are not coherently propagated to other clients' caches. That
is, if a page is cached on host A, and then updated on host B, host
A's page is not coherently invalidated. (Shared writable mmap
- appears to be quite rare--we have yet to here any complaints about this
+ appears to be quite rare--we have yet to hear any complaints about this
behavior, and implementing cache coherency properly is complex.)
- CephFS clients present a hidden ``.snap`` directory that is used to
access, create, delete, and rename snapshots. Although the virtual