Hi Pierre, this is interesting. I was thinking about reducing switchover times by having a standby daemon running, which - once "activated" - would immediately be able to serve users after the active daemon died. Can you give some more information about what you did to the daemon, so it is a standby and can be activated upon failover/ switchover? Cheers, Uli
> -----Original Message----- > From: ext Pierre Sangouard [mailto:[email protected]] > Sent: Sunday, June 27, 2010 10:02 AM > To: 'Lars Wetzel'; [email protected] > Cc: [email protected] > Subject: Re: [Openhpi-devel] Log dump for issue #1868725 > puttopastebin.com... > > > I actually worked on a HA solution where 2 OpenHPI daemons - > 1 active, 1 > standby - would talk to the active Shelf Manager through > RMCP. It did not > work properly since both daemons would act on events at the > same time (Hot > swap events when a board was inserted for example), competing > for SEL and > SDR repository access (via IPMI Reserve commands). What we > ended up doing is > having the standby daemon waiting to be activated upon > failover/switchover > commands (This is of course a very high level description). > > Cheers, > Pierre > > > -----Original Message----- > > From: Lars Wetzel [mailto:[email protected]] > > Sent: Saturday, June 26, 2010 20:06 > > To: [email protected] > > Cc: Pierre Sangouard; [email protected] > > Subject: Re: [Openhpi-devel] Log dump for issue #1868725 put > > topastebin.com... > > > > Hi Pierre, > > > > right, I could also see problems with having two Daemons > connected to one > > ShelfManager. But I'm unsure if these problems only occur with a > > connection > > over SMI? Can this also happen with a connection over lan via RMCP? > > > > Best Regards > > Lars > > > > > > On Saturday, 26. June 2010 15:11, Pierre Sangouard wrote: > > > > -----Original Message----- > > > > From: Frank C. Earl [mailto:[email protected]] > > > > Sent: Tuesday, June 22, 2010 23:03 > > > > To: Lars Wetzel > > > > Cc: Earl, Frank; [email protected] > > > > Subject: Re: [Openhpi-devel] Log dump for issue #1868725 put > > > > topastebin.com... > > > > > > > > Lars Wetzel wrote: > > > > > I will look a little bit deeper in both files in the > next days. > > > > > > > > Thanks! > > > > > > > > > Don't wonder about the questions, I don't have any > hardware here and > > I > > > > > > > > want to > > > > > > > > > exclude any firmware issue as far as it is possible. > > > > > > > > I'm familiar with the concept, trust me. :-D > > > > > > > > > Btw. you mentioned you use a SHMM-500. I think it > will work with > > > > > > > > synchronous > > > > > > > > > SEL? > > > > > > > > Okay, I'll look into that one. Do you know if the > Colorado Springs > > > > CMM's will work in that mode as well? > > > > > > > > > Did you have two daemons running which are connected > to the same > > > > > > > > ShelfManager? > > > > > > > > > > > > To the best of my current knowledge only one daemon is > up. In an HA > > > > configuration, the monitoring and management boards would have a > > daemon > > > > up on both the master and > > > > the standby, but that'd just increase IPMI traffic, > wouldn't it? We > > > > don't care overmuch about gaps in information as long > as it stays up > > and > > > > self-heals over a realistic timeframe. > > > > > > It's a bad idea to have 2 daemons talking to the Shelf > Manager at the > > same > > > time. They will compete for SDR and SEL access and it won't work > > properly. > > > In a HA configuration, only the master daemon should talk > to the Shelf > > > Manager (Been there, done that a couple of years ago). > > > > > > Pierre > > > > > > > > > > > > > -------------------------------------------------------------- > ---------- > > --- > > >--- This SF.net email is sponsored by Sprint > > > What will you do first with EVO, the first 4G phone? > > > Visit sprint.com/first -- http://p.sf.net/sfu/sprint-com-first > > > _______________________________________________ > > > Openhpi-devel mailing list > > > [email protected] > > > https://lists.sourceforge.net/lists/listinfo/openhpi-devel > > > > -- > > ------------------------------- > > Dipl. Wi.ing. > > Lars Wetzel > > Uttinger Str. 13 > > 86938 Schondorf a. Ammersee > > > > Tel.: 0179-2096845 > > Mail: [email protected] > > > > USt-IdNr.: DE181396006 > > > -------------------------------------------------------------- > ---------------- > This SF.net email is sponsored by Sprint > What will you do first with EVO, the first 4G phone? > Visit sprint.com/first -- http://p.sf.net/sfu/sprint-com-first > _______________________________________________ > Openhpi-devel mailing list > [email protected] > https://lists.sourceforge.net/lists/listinfo/openhpi-devel > ------------------------------------------------------------------------------ This SF.net email is sponsored by Sprint What will you do first with EVO, the first 4G phone? Visit sprint.com/first -- http://p.sf.net/sfu/sprint-com-first _______________________________________________ Openhpi-devel mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/openhpi-devel
