It is my understanding that it refers to running a single, normal ceph
cluster with it's component hosts connected over WAN. This would
require OSDs to connect to other OSDs and mons over WAN for nearly
every operation, and is not likely to perform acceptably.
__
It is possible to run a ceph cluster over a WAN if you have reliable
enough WAN with sites close enough for low-ish latency. The OSiRIS
project is architected that way with Ceph services spread evenly
across three university sites in Michigan. There's more information
and contact on their website
I have been running Ceph over a gigabit WAN for a few months now and have been
happy with it. Mine is set up with Strongswan tunnels And dynamic routing with
BIRD) (although I would have used transport Mode and iBGP in hindsight). I
generally have 300-500kbps flow with 5ms latency.
What I spec
On Tue, May 19, 2020 at 10:34 AM Benjeman Meekhof wrote:
>
> It is possible to run a ceph cluster over a WAN if you have reliable
> enough WAN with sites close enough for low-ish latency. The OSiRIS
> project is architected that way with Ceph services spread evenly
> across three university sites
Greg,
My name's Zac and I'm the docs guy for the Ceph Foundation. I have a
long-term plan to create a document that collects error codes and failure
cases, but I am only one man and it will be a few months before I can begin
on it.
Zac Dover
Ceph Docs Guy
On Wed, May 20, 2020 at 4:32 AM Gregory
Great, thanks already.
I will study the publications of the project :)
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Zac, can you confirm that this assumption is true?
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What does tiebreaker monitor mean? What exactly is its purpose?
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You need a third monitor in order to form a quorum if one of the two
sites goes down. With only two sites, there is no safe way for them to
decide who is down.
On Tue, May 19, 2020 at 3:11 PM CodingSpiderFox
wrote:
>
> What does tiebreaker monitor mean? What exactly is its purpose?
>
Hello Zac,
I have some further questions on that page:
Right before the section "Delete Default Zone Group and Zone" there is another
warning that says:
"The following steps assume a multi-site configuration using newly installed
systems that aren’t storing data yet. DO NOT DELETE the default
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