On 2009-09-02 05:30, Paul Richards wrote:
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.
I'd think about selling the SSD and either buy more RAM or a SCSI controller and a 10K RPM drive.
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?
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