Hi Dulitha, On Tue, Apr 19, 2016 at 11:42 PM, Dulitha Wijewantha <[email protected]> wrote:
> > > On Tue, Apr 19, 2016 at 3:51 AM, Anjana Fernando <[email protected]> wrote: > >> Hi, >> >> Are we talking about having two instances of running in one physical >> machine or else, just one instance running? .. As Srinath said, usually HA >> in one node does not make sense, since it does not really have HA, if >> there's a single point of failure. But some people do put multiple >> instances of software in really dependable hardware, and just have the >> extra instances for process level HA, i.e. if due to a software related >> issue a process is killed, the other takes over. >> > > @Anjan how does this work? If the 2 nodes are started in the same machine > they have to bind to different ports. If one node goes down - how can the > other node take it's place. Or are you talking about scenario where the > second node is started if the process ID is killed? > Two instances would be running as a cluster, fronted by a load balancer, not that the other process detects a killed process. > > (It's confusing to say this mode as HA since it's really not Highly > Available. It looks more like DR in a single node) > Yeah, I also didn't mean we should put this as a possible HA mode, I just mentioned, some people do this, and wanted to know, if it was this that was meant when the thread started. Cheers, Anjana. > > > >> >> Cheers, >> Anjana. >> >> On Tue, Apr 19, 2016 at 10:28 AM, Srinath Perera <[email protected]> >> wrote: >> >>> IMO HA in same node does not make much sense. >>> >>> --Srinath >>> >>> On Tue, Apr 12, 2016 at 10:30 AM, Nirmal Fernando <[email protected]> >>> wrote: >>> >>>> Hi All, >>>> >>>> Is it possible to setup DAS minimum HA deployment in one node? AFAIS >>>> the requirement to create a symbolic link makes it impossible? >>>> >>>> -- >>>> >>>> Thanks & regards, >>>> Nirmal >>>> >>>> Team Lead - WSO2 Machine Learner >>>> Associate Technical Lead - Data Technologies Team, WSO2 Inc. >>>> Mobile: +94715779733 >>>> Blog: http://nirmalfdo.blogspot.com/ >>>> >>>> >>>> >>> >>> >>> -- >>> ============================ >>> Blog: http://srinathsview.blogspot.com twitter:@srinath_perera >>> Site: http://home.apache.org/~hemapani/ >>> Photos: http://www.flickr.com/photos/hemapani/ >>> Phone: 0772360902 >>> >> >> >> >> -- >> *Anjana Fernando* >> Senior Technical Lead >> WSO2 Inc. | http://wso2.com >> lean . enterprise . middleware >> >> _______________________________________________ >> Dev mailing list >> [email protected] >> http://wso2.org/cgi-bin/mailman/listinfo/dev >> >> > > > -- > Dulitha Wijewantha (Chan) > Software Engineer - Mobile Development > WSO2 Inc > Lean.Enterprise.Middleware > * ~Email [email protected] <[email protected]>* > * ~Mobile +94712112165 <%2B94712112165>* > * ~Website dulitha.me <http://dulitha.me>* > * ~Twitter @dulitharw <https://twitter.com/dulitharw>* > *~Github @dulichan <https://github.com/dulichan>* > *~SO @chan <http://stackoverflow.com/users/813471/chan>* > -- *Anjana Fernando* Senior Technical Lead WSO2 Inc. | http://wso2.com lean . enterprise . middleware
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