SSD caching with striping possible ?
Posted: Mon Mar 15, 2021 12:30 pm
Hello,
I have an old board with a SATA2 controller .
Upgrading the board with a Sata3 SSD limits me to Sata2 3BG bandwith (in reality only 2.5BG).
But the controller can handle 4 Sata2 ports
if I could use a small ssd to cache the big one with striping (like in raid) I could reach on two ports 5GB bandwith
Is striping technology pĂ´ssible with primocache ? if yes Did you make tests and would it increase the main SSD performance to read on two lanes ?
a bit like dual channel rams, if it improves ram why not SSD ?
My example is with an old sata2 board, but maybe it could also increase ssd throughput on newer sata3 ?
if on sata port 1 I have the main SSD "A", on port 2 I have a small SSD "B1", an on port 3 I have another small SSD "B2"
Bloc 1 and 4 are read from main SSD "A", bloc 2 and 5 are read from SSD cache "B1", bloc 3 and 6 are read from SSD cache "B2", etc ..
each cache only storing blocks required by his stripping setup. (But unlike raid it's still a cache and SSD "A" still holds all the data)
I have an old board with a SATA2 controller .
Upgrading the board with a Sata3 SSD limits me to Sata2 3BG bandwith (in reality only 2.5BG).
But the controller can handle 4 Sata2 ports
if I could use a small ssd to cache the big one with striping (like in raid) I could reach on two ports 5GB bandwith
Is striping technology pĂ´ssible with primocache ? if yes Did you make tests and would it increase the main SSD performance to read on two lanes ?
a bit like dual channel rams, if it improves ram why not SSD ?
My example is with an old sata2 board, but maybe it could also increase ssd throughput on newer sata3 ?
if on sata port 1 I have the main SSD "A", on port 2 I have a small SSD "B1", an on port 3 I have another small SSD "B2"
Bloc 1 and 4 are read from main SSD "A", bloc 2 and 5 are read from SSD cache "B1", bloc 3 and 6 are read from SSD cache "B2", etc ..
each cache only storing blocks required by his stripping setup. (But unlike raid it's still a cache and SSD "A" still holds all the data)