Re: [ClusterLabs] Antw: Re: [EXT] Re: Two node cluster without fencing and no split brain?

2021-07-28 Thread Strahil Nikolov via Users
So far, I never had a cluster with nodes directly connected to the same switches. Usually it's a nodeA -> switchA -> switchB -> nodeB and sometimes connectivity between switches goes down (for example a firewall rule). Best Regards, Strahil Nikolov В сряда, 28 юли 2021 г., 15:51:36 ч.

Re: [ClusterLabs] Antw: Re: [EXT] Re: Two node cluster without fencing and no split brain?

2021-07-28 Thread kgaillot
On Wed, 2021-07-28 at 08:51 -0400, john tillman wrote: > > Technically you could give one vote to one node and zero to the > > other. > > If they lose contact only the server with one vote would make > > quorum. > > The downside is that if the server with 1 vote goes down the entire > >

Re: [ClusterLabs] Antw: Re: [EXT] Re: Two node cluster without fencing and no split brain?

2021-07-28 Thread john tillman
> Technically you could give one vote to one node and zero to the other.  > If they lose contact only the server with one vote would make quorum.  > The downside is that if the server with 1 vote goes down the entire > cluster comes to a halt. > > > That said, if both nodes can reach the same

Re: [ClusterLabs] Antw: Re: [EXT] Re: Two node cluster without fencing and no split brain?

2021-07-26 Thread Frank D. Engel, Jr.
Technically you could give one vote to one node and zero to the other.  If they lose contact only the server with one vote would make quorum.  The downside is that if the server with 1 vote goes down the entire cluster comes to a halt. That said, if both nodes can reach the same switch that

Re: [ClusterLabs] Antw: Re: [EXT] Re: Two node cluster without fencing and no split brain?

2021-07-26 Thread kgaillot
On Mon, 2021-07-26 at 12:21 -0400, john tillman wrote: > > On Mon, Jul 26, 2021 at 4:53 PM john tillman > > wrote: > > > > > > > > > > Maybe explain how it should work: > > > > > If the two nodes cannot rech each other, but each can reach > > > > > the ping > > > > > node, > > > > > which node

Re: [ClusterLabs] Antw: Re: [EXT] Re: Two node cluster without fencing and no split brain?

2021-07-26 Thread john tillman
> On Mon, Jul 26, 2021 at 4:53 PM john tillman wrote: >> >> >> >> Maybe explain how it should work: >> >> If the two nodes cannot rech each other, but each can reach the ping >> >> node, >> >> which node has the quorum then? >> >> >> > >> > Guess both - which is what is played down as

Re: [ClusterLabs] Antw: Re: [EXT] Re: Two node cluster without fencing and no split brain?

2021-07-26 Thread Andrei Borzenkov
On Mon, Jul 26, 2021 at 4:53 PM john tillman wrote: > >> > >> Maybe explain how it should work: > >> If the two nodes cannot rech each other, but each can reach the ping > >> node, > >> which node has the quorum then? > >> > > > > Guess both - which is what is played down as 'disadvantage' in the

Re: [ClusterLabs] Antw: Re: [EXT] Re: Two node cluster without fencing and no split brain?

2021-07-26 Thread john tillman
> On Fri, Jul 23, 2021 at 8:55 AM Ulrich Windl < > ulrich.wi...@rz.uni-regensburg.de> wrote: > >> >>> "john tillman" schrieb am 22.07.2021 um 16:48 in >> Nachricht >> <1175ffcec0033015e13d11d7821d5acb.squir...@mail.panix.com>: >> > There was a lot of discussion on this topic which might have >>

Re: [ClusterLabs] Antw: Re: [EXT] Re: Two node cluster without fencing and no split brain?

2021-07-23 Thread Klaus Wenninger
On Fri, Jul 23, 2021 at 8:55 AM Ulrich Windl < ulrich.wi...@rz.uni-regensburg.de> wrote: > >>> "john tillman" schrieb am 22.07.2021 um 16:48 in > Nachricht > <1175ffcec0033015e13d11d7821d5acb.squir...@mail.panix.com>: > > There was a lot of discussion on this topic which might have overshadowed

[ClusterLabs] Antw: Re: [EXT] Re: Two node cluster without fencing and no split brain?

2021-07-23 Thread Ulrich Windl
>>> "john tillman" schrieb am 22.07.2021 um 16:48 in Nachricht <1175ffcec0033015e13d11d7821d5acb.squir...@mail.panix.com>: > There was a lot of discussion on this topic which might have overshadowed > this question so I will ask it again in case someone missed it. > > It comes from a post (see