HDR & Logical Logs and Network failure
Pankaj asked what happens to an HDR pair (Solaris, IDS 7.30.UC6) when the network fails and the primary backs up logical logs to tape meanwhile. Rudy Fernandes said the secondary normally resyncs automatically from the primary's disk logs, but if the logs cycle you are prompted to recover from tape or restart HDR. Pankaj got an answer from Informix but did not post it.
Auto-generated by Claude from the posts below — may be imperfect; read the full thread.
Hi All , Need some help. Solaris 5.6 & IDS 7.30.UC6 & HDR . Need it quickly as I only found out about the network going down about 2 minutes ago and never got to test this scenario out. Does anyone know what happens when there is a Network failure and the Primary Server cannot Talk to the Secondary server, But no damage has occurred to either, and a number of logical logs on the primary are backed-up to tape during the network down time ? When the network connection comes back up :- 1.Can the secondary re-sync itself with the primary as you have written a number of logs to tape during the network break ? 2. or Does the secondary require the logical log tape from the primary to roll forward the logical logs and if it does require the logical logs do you stop logical logging on the primary during this time ( this last one I would have thought so but I have know be wrong). Whew !!! Cheers for you help. Pankaj
Pankaj wrote: > Hi All , > > Need some help. Solaris 5.6 & IDS 7.30.UC6 & HDR . Need it quickly as I only > found out about the network going down about 2 minutes ago and never got to > test this scenario out. > > Does anyone know what happens when there is a Network failure and the > Primary Server cannot Talk to the Secondary server, But no damage has > occurred to either, and a number of logical logs on the primary are > backed-up to tape during the network down time ? > > When the network connection comes back up :- > > 1.Can the secondary re-sync itself with the primary as you have written a > number of logs to tape during the network break ? In most cases the Secondary will resync automatically, using logs on disk from the primary. However, if the required logs get overwritten (i.e the primary's logs cycle completely), you will be prompted to recover from tape. I'm not sure what this means - could be just the required log - but the bottom line is that you can restart HDR from scratch. Rudy
Hi All , I have an answer from Informix. Pankaj Pankaj wrote in message <962807914.18475.0.nnrp-10.d4e5c55a@news.demon.co.uk>... >Hi All , > >Need some help. Solaris 5.6 & IDS 7.30.UC6 & HDR . Need it quickly as I only >found out about the network going down about 2 minutes ago and never got to >test this scenario out. >
Didn't your mother teach you to share?! If you post that answer the next poor slob will find it searching the archive. Art S. Kagel Pankaj wrote: > > Hi All , > > I have an answer from Informix. > > Pankaj > Pankaj wrote in message > <962807914.18475.0.nnrp-10.d4e5c55a@news.demon.co.uk>... > >Hi All , > > > >Need some help. Solaris 5.6 & IDS 7.30.UC6 & HDR . Need it quickly as I > only > >found out about the network going down about 2 minutes ago and never got to > >test this scenario out. > >
Hi , I have to apologise. I was pretty rushed and never actually thought of posting the answer. Pankaj Art S. Kagel wrote in message <3963A806.4FFFCB72@bloomberg.net>... >Didn't your mother teach you to share?! If you post that answer the next >poor slob will find it searching the archive. > >Art S. Kagel > >Pankaj wrote: >> >> Hi All , >> >> I have an answer from Informix. >> >> Pankaj >> Pankaj wrote in message >> <962807914.18475.0.nnrp-10.d4e5c55a@news.demon.co.uk>... >> >Hi All , >> > >> >Need some help. Solaris 5.6 & IDS 7.30.UC6 & HDR . Need it quickly as I >> only >> >found out about the network going down about 2 minutes ago and never got to >> >test this scenario out. >> >