Unless one could instantly spin up another ZK instance on the non-failed frame...
+1.314.452.2896 (Tel/SMS) On Tue, May 1, 2018 at 12:00 PM, Steph van Schalkwyk < [email protected]> wrote: > Adam, > More information here: > https://stackoverflow.com/questions/24694296/using- > zookeeper-with-solr-but-only-have-2-servers > Unless ZK can be instantly "reconfigured" to consider the remaining 3 as a > full ensemble, I don't see an option. > Steph > > > +1.314.452.2896 (Tel/SMS) > > On Tue, May 1, 2018 at 11:53 AM, Adam Blank <[email protected]> wrote: > >> Thanks for your replies, Steph. Adding back the rest of the mailing list. >> If anyone can shed some light on my predicament that would be much >> appreciated. >> >> Adam >> >> ---------- Forwarded message ---------- >> From: Steph van Schalkwyk <[email protected]> >> Date: Tue, May 1, 2018 at 12:44 PM >> Subject: Re: Configuring SolrCloud with Redundancy on Two Physical Frames >> To: Adam Blank <[email protected]> >> >> >> Maybe one of the ZK gurus could chime in? I could test it but I don't have >> the time right now. >> >> >> +1.314.452.2896 (Tel/SMS) >> >> On Tue, May 1, 2018 at 11:42 AM, Adam Blank <[email protected]> wrote: >> >> > I think I would still run into the same issue since if one frame goes >> down >> > I will only have 50% of ZK instances still up, and my understanding is >> that >> > a ZK cluster requires a majority to be up in order to operate. So if I >> have >> > 6 total I'd need 4 to be up. >> > >> > >> > On Tue, May 1, 2018, 12:34 PM Steph van Schalkwyk < >> [email protected]> >> > wrote: >> > >> >> Only thing I can think of is to run three ZK instances on each hardware >> >> instance. That way if one fails you still have three running on the >> other >> >> hardware instance. >> >> Also, when you set up the SOLR instances, make sure you're sharding >> >> across hardware instances, for example two shards per collection on >> >> instance 0 and two on the other. >> >> S >> >> >> >> +1.314.452.2896 (Tel/SMS) >> >> >> >> On Tue, May 1, 2018 at 10:17 AM, Adam Blank <[email protected]> >> wrote: >> >> >> >>> Hi Steph, >> >>> >> >>> I should have provided some more info. I am running on AIX. If I'm >> >>> understanding your comment correctly, the issue I'm having isn't with >> being >> >>> able to run multiple ZK instances on a single server. The issue is >> with >> >>> setting up ZK and SOLR in a way that it can survive either frame >> failure. >> >>> I wonder if setting up a virtual IP for the ZK instances and having >> SOLR >> >>> connect to the VIP would work if all ZK instances share the same data >> >>> directory on a shared drive? I was hoping someone has encountered >> this >> >>> situation before, but if not, I can see if that idea would work. >> >>> >> >>> Thanks, >> >>> Adam >> >>> >> >>> On Tue, May 1, 2018 at 10:59 AM, Steph van Schalkwyk < >> >>> [email protected]> wrote: >> >>> >> >>>> Adam, is it possible to virtualize in any way? >> >>>> As for single physical instances, I have been running three instances >> >>>> of ZK >> >>>> on one VM quite comfortably. This is only for dev/testing, though. >> >>>> Regards >> >>>> Steph >> >>>> >> >>>> >> >>>> +1.314.452.2896 (Tel/SMS) >> >>>> >> >>>> On Tue, May 1, 2018 at 9:55 AM, Adam Blank <[email protected]> >> >>>> wrote: >> >>>> >> >>>> > Hello, >> >>>> > >> >>>> > I would like to have a high-availability/redundant installation of >> >>>> > Zookeeper running in my production environment. The problem is >> that I >> >>>> only >> >>>> > have 2 physical frames available, so that rules out configuring a >> >>>> Zookeeper >> >>>> > cluster/ensemble since I'd only have redundancy if the frame with >> the >> >>>> > minority of servers goes down. What is the best practice in this >> >>>> situation? >> >>>> > Is it possible to have a separate standalone install running on >> each >> >>>> frame >> >>>> > connected to the same set of SOLR nodes or to use one server as >> >>>> primary and >> >>>> > one as backup? >> >>>> > >> >>>> > Thank you, >> >>>> > Adam >> >>>> > >> >>>> >> >>> >> >>> >> >> >> > >
