On 06/18/2012 11:37 PM, Stefan Priebe - Profihost AG wrote:
Hello list,
i've now patched my qemu to include the qemu cache settings for rbd.
Now i can change my drive caching mode. But there are also these
settings for global section in ceph.conf.
rbd_cache = true
rbd_cache_size = 33554432
rbd_cache_max_age = 2.0
How do they influence or replace each other?
thanks
Stefan
In qemu, the cache settings map to:
writeback:
rbd_cache = true
writethrough:
rbd_cache = true
rbd_cache_max_dirty = 0
none:
rbd_cache = false
qemu's settings are overridden by any custom settings you have in a
config file or on the qemu command line.
Josh
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