Hi Andrey, > let suppose I would like 3/2N + 1 nodes to participate in quorum. Is it possible ?
I guess you mean (2/3)N + 1 ? Otherwise, (3/2)N + 1 > N which is impossible, and 3/(2N) + 1 is too small for a slightly large N. No, Ratis currently does not support it. And yes, we are welcome to contribute such a feature! We could support a quorum of rN for r configurable with 1 >= r > 0.5. Tsz-Wo On Thu, Jul 21, 2022 at 1:21 AM Andrey Lomakin <[email protected]> wrote: > Hi Tsz-Wo. > May I ask you one more question? > Is it possible to regulate amount of nodes in quorum, what I mean if that > is fixed that N/2 + 1 nodes should participate in quorum or I can setup of > for example my own number which has to be of course high enough, let > suppose I would like 3/2N + 1 nodes to participate in quorum. > Is it possible ? > > If that is not possible, will you accept such a contribution ? > > On Wed, Jul 20, 2022 at 7:57 PM Andrey Lomakin < > [email protected]> > wrote: > > > Yes, thank you very much. > > > > On Wed, Jul 20, 2022 at 6:40 PM Tsz Wo Sze <[email protected]> wrote: > > > >> Hi Andrey, > >> > >> We may set a higher priority for the predefined master. Then, the lower > >> priority servers won't become a leader. Is it something that you want > to > >> do? > >> > >> Tsz-Wo > >> > >> > >> On Wed, Jul 20, 2022 at 12:14 AM Andrey Lomakin > >> <[email protected]> wrote: > >> > >> > Hi Tsz-Wo. > >> > Thank you for your prompt response. > >> > I meant a different thing. > >> > > >> > We at the first stage would like to use replication mechanics of Raft > >> but > >> > would like to have a predefined master in the cluster without ability > to > >> > change it. > >> > Is it possible to achieve that? > >> > > >> > > >> > On Tue, Jul 19, 2022 at 5:58 PM Tsz Wo Sze <[email protected]> > wrote: > >> > > >> > > Hi Andrey, > >> > > > >> > > Do you mean running a single node Ratis cluster? Yes, you can do > it. > >> > > > >> > > Tsz-Wo > >> > > > >> > > On Tue, Jul 19, 2022 at 8:56 AM Andrey Lomakin > >> > > <[email protected]> wrote: > >> > > > >> > > > Hi guys. > >> > > > I am a developer of the Xodus KV database created and supported by > >> > > > JetBrains. > >> > > > > >> > > > We are considering integration of Apache Ratis in our application > >> and > >> > > > database step by step (no promises though). > >> > > > > >> > > > Could you clarify is it possible to setup a fixed master node for > >> the > >> > > > cluster at this moment avoiding usage of membership protocol ? > >> > > > > >> > > > >> > > >> > > >
