Hi, all:
I know it's possible to set up dm-cache to combine network-attached
block devices and local SSDs, but I'm having a hard time finding any
first-hand evidence of this being done anywhere -- so I'm wondering if
it's because there are reasons why this is a Bad Idea, or merely because
there aren't many reasons for folks to do that.
The reason why I'm trying to do it, in particular, is for
mirrors.kernel.org systems where we already rely on dm-cache to combine
large slow spinning disks with SSDs to a great advantage. Most hits on
those systems are to the same set of files (latest distro package
updates), so dm-cache hit-to-miss ratio is very advantageous. However,
we need to build newest iterations of those systems, and being able to
use network-attached storage at providers like Packet with local SSD
drives would remove the need for us to purchase and host huge drive
arrays.
Thanks for any insights you may offer.
Best,
Konstantin
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