[Gluster-users] JBOD / ZFS / Flash backed

Vincent Royer vincent at epicenergy.ca
Mon Apr 9 18:00:08 UTC 2018

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

*Vincent Royer*


On Mon, Apr 9, 2018 at 10:34 AM, Alex Chekholko <alex at calicolabs.com> 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 at epicenergy.ca>
> 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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