[libvirt-users] Has libvirt guest pagecache level ?
Greetings
Has libvirt dedicated page cache area for guest ?
If not - what is the difference between
cache='none' and cache='directsync' ?
The optional cache attribute controls the cache mechanism, possible
>values are "default", "none", "writethrough",
"writeback", "directsync" >(like "writethrough", but it
bypasses the host page cache) and >"unsafe" (host may cache all disk io, and
sync requests from guest >are ignored).
As I understand 'unsafe' -
always remove flags O_SYNC|O_DIRECT fron
guest level.
What about other cache options - how it work ?
Would be glad see any schema or description, if You have.
b.r.
Maxim Kozin