Yes the flash-backed RAID cards use a super-capacitor to backup the flash cache. You have a choice of flash module sizes to include on the card. The card supports RAID modes as well as JBOD.
I do not know if Gluster can make use of battery-backed flash-based Cache when the disks are presented by the RAID card in JBOD. The Hardware vendor asked "Do you know if Gluster makes use of flash-cache in JBOD?"
If it does, I'm not certain how the size of this flash cache affects the operation.
Vincent Royer
778-825-1057
SUSTAINABLE MOBILE ENERGY SOLUTIONS
On Mon, Apr 9, 2018 at 10:34 AM, Alex Chekholko <alex@xxxxxxxxxxxxxx> wrote:
Your question is difficult to parse. Typically RAID and JBOD are mutually exclusive. By "flash-backed", do you mean a battery backup unit (BBU) on your RAID controller?On Mon, Apr 9, 2018 at 8:49 AM, Vincent Royer <vincent@xxxxxxxxxxxxx> wrote:Is a flash-backed Raid required for JBOD, and should it be 1gb, 2, or 4gb flash?Is anyone able to clarify this requirement for me?
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