Le Thu, 14 Sep 2017 10:10:09 -0300
FERNANDO FREDIANI [off-list ref] écrivait:

If the users reads a piece of data that is just writen to SSD
(unlikely) it should first and in any condition be commited to the
permanent storage and then read from there and cached in another area
of the SSD. Writaback cache is very volatile and lasts only a few
seconds while the data is not yet committed to permanent storage.

In fact multiple device suport is not implemented yet, that's why I
am asking it and comparing with other well technology as ZFS.

However nothing in bcache prevents you from using for instance a RAID
of SSDs as a cache device. Actually for write caching it's mandatory
IMO. 

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