On Thu, 15 Aug 2013, Adam Brenner wrote: > > Hence, looking for a non-writeback SSD cache which can be transparently > > added and removed from the system. > > Removing / Adding a caching device within Bcache can be done on a live > system, so long as a backing device is created before hand. This was > explained here: > http://comments.gmane.org/gmane.linux.kernel.bcache.devel/1886
Sorry, maybe I should have been more clear. I meant adding without modifying the _backing_ device. > > Doesn't look like it's possible from the docs; has there been any work on > > this -- a different 'glue' or front end? > > Is this what you are looking for? https://github.com/g2p/blocks > > This should keep any data on the backing device without the need to format. Not really, keeping the data on the partition is only part of the solution -- and this requires free space before the partiion, or LVM. As I said, I don't wish to modify the backing device at all (even in-place for risk to data) or use a new partition format (also prevents mounting the filesystem on other systems, or boot disks) And it's just not necessary anyway if using a non-persistent read cache. The nature of swapcache's integration makes it easier and less disruptive to configure -- especially for people who don't already use an initrd. It would make it easier to experiement with the caching in different scenarios. Thanks -- Mark -- To unsubscribe from this list: send the line "unsubscribe linux-bcache" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
