On 09/04/18 22:15, Vincent Royer wrote:
Thanks,
The 3 servers are new Lenovo units with redundant PS backed by two
huge UPS units (on for each bank of power supplies). I think the
chances of losing two nodes is incredibly slim, and in that case a
Disaster Recovery from offsite backups would
Thanks,
The 3 servers are new Lenovo units with redundant PS backed by two huge UPS
units (on for each bank of power supplies). I think the chances of losing
two nodes is incredibly slim, and in that case a Disaster Recovery from
offsite backups would be reasonable.
My requirements are about 2TB
On 09/04/18 19:02, Vincent Royer wrote:
Thanks,
I suppose what I'm trying to gain is some clarity on what choice is
best for a given application. How do I know if it's better for me to
use a raid card or not, to include flash-cache on it or not, to use
ZFS or not, when combined with a small
On 09/04/18 19:00, Vincent Royer wrote:
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 flas
Thanks,
I suppose what I'm trying to gain is some clarity on what choice is best
for a given application. How do I know if it's better for me to use a raid
card or not, to include flash-cache on it or not, to use ZFS or not, when
combined with a small number of SSDs in Replica 3.
On Mon, Apr 9
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
On 09/04/18 16:49, Vincent Royer wrote:
Is a flash-backed Raid required for JBOD, and should it be 1gb, 2,
or 4gb flash?
RAID and JBOD are completely different things. JBODs are just that,
bunches of disks, and they don't have any cache above them in hardware.
If you're going to use
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 wrote:
>
>> Is a flash-backed Raid required for JBOD, and should it be 1gb, 2, o
>
>
> 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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thanks for your reply,
Yes the VMs are very small and provide only a single service, I would
prefer a total of 2TB but 1TB to start is sufficient. Ideally I want a
scheme that is easy to expand by dropping an extra disk in each node. When
all slots are full, add another node.
our current setup a
Based on your message, it sounds like your total usable capacity
requirement is around <1TB. With a modern SSD, you'll get something like
40k theoretical IOPs for 4k I/O size.
You don't mention budget. What is your budget? You mention "4MB
operations", where is that requirement coming from?
On
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