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Dave Howorth wrote:
On Mon, 09 Dec 2019 18:36:48 +0100 Per Jessen <per@computer.org> wrote:
Dave Howorth wrote:
Interesting. I do use LVM so I could do the same. There's a good article at:
http://strugglers.net/~andy/blog/2017/07/19/bcache-and-lvmcache/
That seems to suggest it may be worth the extra effort of configuring bcache IIUC. I might have a go with my new SSD; it seems like a sensible way to use part of it.
One difference seems to be that you can add an SSD cache to a populated LVM filesystem, whereas bcache needs you to create a new cached filesystem, I think.
The choice of lvmcache was easy - we're using lvm anyway (of course), and it was so easy to add to existing systems. I'm not sure exactly when we did it, it was at least a year ago. The SSD are relatively small - 240Gb I think. Not at all expensive either.
Given what the comments say about losing the entire filesystem if the cache drive dies, and inability to take backups, have you found any solutions?
Yes, snapshot'ing is not supported, I know. My initial reaction to the idea of losing the entire fileystems - if that were a genuine problem, no one would be using lvmcache. Should be easy to reproduce though. -- Per Jessen, Zürich (2.4°C) -- To unsubscribe, e-mail: opensuse+unsubscribe@opensuse.org To contact the owner, e-mail: opensuse+owner@opensuse.org