using a fast drive as an emulated cache for a slow drive

Question

Hello I have a huge network drive from the cloud (webdav drive mount as a local directory) which is quite slow, I would like to use a fast local drive as a cache for the slow drive and the whole thing mount transparently as a unique drive or webdav. Is there any software (preferably linux based) solution that allow this ?

A related problem is the following : I have an archive slow drive for which 99% data is not accessed very often, but the other part of the data could accessed very often. As I cannot predict which part will be needed I would like a system that would put the most recent accessed data on a fast drive available for further demand. What is the best way to solve this kind of problem ?

I heard about http://bcachefs.org/ and older bcache https://lwn.net/Articles/458417/ which looks great but I don't think it can work with a network or webdav drive

Thanks

Why don't you use [dm-cache](https://www.kernel.org/doc/Documentation/device-mapper/cache.txt)? — Michael Hampton, Dec 13 '17 at 17:40
Looks interesting but it seems to work at the block level, therefore it should not work with a webdav even if it is mount as a directory, what do you think ? — sarah-486, Dec 13 '17 at 18:56
That depends on how you mount it, I suppose. davfs is FUSE based which might work. — Michael Hampton, Dec 13 '17 at 19:19
Interesting, I will give it a try did you notice a sizeable improvement with dm-cache ? — sarah-486, Dec 13 '17 at 19:45

using a fast drive as an emulated cache for a slow drive

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