Re: Forming drives together into a cache hierarchy
2009/9/2 Paul Richards <paul.richards@gmail.com>:
> Is there a way to combine a large slow drive with a fast small drive
> in such a way that the faster drive simply becomes a cache for the
> larger drive?
>
> I imagine a computer where I'd like to have a small fast SSD and a
> large but slow spinning disk. I'd like to put the two block devices
> together so that I'm presented with a single logical block device,
> where the operating system is using the SSD as a cache (either
> inclusive or exclusive, write-though or otherwise) of the spinning
> disk.
>
> Is there some magic in LVM that can do this?
>
> If there is nothing at the block device level can it be done at the
> filesystem level?
>
This looks close:
http://www.cis.fiu.edu/~zhaom/dmcache
But unfortunately this isn't available in a standard Debian
installation. Perhaps I simply need to wait a while longer.
--
Paul Richards
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