Replication (different OS-es and IDS versions )

Hello, I have 2 IDS 7.3/Uniware servers working with replication enabled. I would like to migrate one of them to 9.4/AIX and then to enable enterpsrise replication with the second IDS 7.3/Unixware server. I could not find unequivocal answer in Informix Enterprise Replication Guide. Is it possible? Could you give me please any advice? Thanks a lot, Wojtek

We support ER replication between version such as 7.3 and 9.4. However, you will not be able to take advantage of all of the new functions with mixed levels. Be aware, the 7.3 replication groups do not exist with 9.3/9.4 and the 9.3/9.4 replicate sets do not exist with 7.3. Also, you need to set CDRSITES_7.3 on the 9.3 server (see the release notes or contact tech support for details.) M.P. "Wojtas" <wkorgol@nospam.gazeta.pl> wrote in message news:ceivr6$edb$1@inews.gazeta.pl... > Hello, > > I have 2 IDS 7.3/Uniware servers working with replication enabled. > > I would like to migrate one of them to 9.4/AIX and then to enable > enterpsrise replication with the second IDS 7.3/Unixware server. > > I could not find unequivocal answer in Informix Enterprise Replication > Guide. > Is it possible? > Could you give me please any advice? > > Thanks a lot, > Wojtek > >

This response caused me to consider another replication question. We are currently running IDS 9.21 on a Sun box running Solaris 8 We bought a new Sun box, running Solaris 9, and will install IDS 9.4 on it. Then, migrate the data. I was under the impression that HDR would not work between IDS of different versions (in this case, 9.21 and 9.4). The fact that ER will work between 7.3 and 9.4 gives me a faint glimmer of hope that maybe I was mistaken. Can HDR work between 9.21 and 9.4? If so, I could a level 0 ontape backup and restore from the production 9.21 to a development 9.21 instance (on another machine), then dbimport to the new 9.4 instance on the new machine, then initiate HDR between the new 9.4 and old production 9.21, and then finally lose the 9.21 instance (replace with 9.4 if we want to continue the HDR). At the end of the day, the result would be migration to new box and new version with no interruption of service. Hence, the question: Could it be that HDR works between 9.21 and 9.4, despite my (possibly erroneous) understanding of the documentation which indicates it won't work. Thank you. DG "Madison Pruet" <mpruet@comcast.net> wrote in message news:E9ePc.198675$IQ4.11863@attbi_s02... > We support ER replication between version such as 7.3 and 9.4. However, you > will not be able to take advantage of all of the new functions with mixed > levels. > > Be aware, the 7.3 replication groups do not exist with 9.3/9.4 and the > 9.3/9.4 replicate sets do not exist with 7.3. > > Also, you need to set CDRSITES_7.3 on the 9.3 server (see the release notes > or contact tech support for details.) > > M.P. > > "Wojtas" <wkorgol@nospam.gazeta.pl> wrote in message > news:ceivr6$edb$1@inews.gazeta.pl... > > Hello, > > > > I have 2 IDS 7.3/Uniware servers working with replication enabled. > > > > I would like to migrate one of them to 9.4/AIX and then to enable > > enterpsrise replication with the second IDS 7.3/Unixware server. > > > > I could not find unequivocal answer in Informix Enterprise Replication > > Guide. > > Is it possible? > > Could you give me please any advice? > > > > Thanks a lot, > > Wojtek > > > > > >

See below... "David E. Grove" <david_grove@correct.state.ak.us> wrote in message news:10gsu8df51vcg66@corp.supernews.com... > This response caused me to consider another replication question. > > We are currently running IDS 9.21 on a Sun box running Solaris 8 We bought > a new Sun box, running Solaris 9, and will install IDS 9.4 on it. Then, > migrate the data. > > I was under the impression that HDR would not work between IDS of different > versions (in this case, 9.21 and 9.4). > > The fact that ER will work between 7.3 and 9.4 gives me a faint glimmer of > hope that maybe I was mistaken. Can HDR work between 9.21 and 9.4? Nope. Since HDR works by placing the target into recovery, that means that the 9.4 server would need to behave exactly like the 9.21 server, and would need to have identical log records. Neither are true. > > If so, I could a level 0 ontape backup and restore from the production 9.21 > to a development 9.21 instance (on another machine), then dbimport to the > new 9.4 instance on the new machine, then initiate HDR between the new 9.4 > and old production 9.21, and then finally lose the 9.21 instance (replace > with 9.4 if we want to continue the HDR). At the end of the day, the result > would be migration to new box and new version with no interruption of > service. > > Hence, the question: Could it be that HDR works between 9.21 and 9.4, > despite my (possibly erroneous) understanding of the documentation which > indicates it won't work. Nope HDR requires the same binary executable. > > Thank you. > > DG > > > > > "Madison Pruet" <mpruet@comcast.net> wrote in message > news:E9ePc.198675$IQ4.11863@attbi_s02... > > We support ER replication between version such as 7.3 and 9.4. However, > you > > will not be able to take advantage of all of the new functions with mixed > > levels. > > > > Be aware, the 7.3 replication groups do not exist with 9.3/9.4 and the > > 9.3/9.4 replicate sets do not exist with 7.3. > > > > Also, you need to set CDRSITES_7.3 on the 9.3 server (see the release > notes > > or contact tech support for details.) > > > > M.P. > > > > "Wojtas" <wkorgol@nospam.gazeta.pl> wrote in message > > news:ceivr6$edb$1@inews.gazeta.pl... > > > Hello, > > > > > > I have 2 IDS 7.3/Uniware servers working with replication enabled. > > > > > > I would like to migrate one of them to 9.4/AIX and then to enable > > > enterpsrise replication with the second IDS 7.3/Unixware server. > > > > > > I could not find unequivocal answer in Informix Enterprise Replication > > > Guide. > > > Is it possible? > > > Could you give me please any advice? > > > > > > Thanks a lot, > > > Wojtek > > > > > > > > > > > >

Thank you for your fast, helpful response. DG "Madison Pruet" <mpruet@comcast.net> wrote in message news:lxwPc.67828$8_6.46257@attbi_s04... > See below... > > "David E. Grove" <david_grove@correct.state.ak.us> wrote in message > news:10gsu8df51vcg66@corp.supernews.com... > > This response caused me to consider another replication question. > > > > We are currently running IDS 9.21 on a Sun box running Solaris 8 We > bought > > a new Sun box, running Solaris 9, and will install IDS 9.4 on it. Then, > > migrate the data. > > > > I was under the impression that HDR would not work between IDS of > different > > versions (in this case, 9.21 and 9.4). > > > > The fact that ER will work between 7.3 and 9.4 gives me a faint glimmer of > > hope that maybe I was mistaken. Can HDR work between 9.21 and 9.4? > > Nope. Since HDR works by placing the target into recovery, that means that > the 9.4 server would need to behave exactly like the 9.21 server, and would > need to have identical log records. Neither are true. > > > > > If so, I could a level 0 ontape backup and restore from the production > 9.21 > > to a development 9.21 instance (on another machine), then dbimport to the > > new 9.4 instance on the new machine, then initiate HDR between the new 9.4 > > and old production 9.21, and then finally lose the 9.21 instance (replace > > with 9.4 if we want to continue the HDR). At the end of the day, the > result > > would be migration to new box and new version with no interruption of > > service. > > > > Hence, the question: Could it be that HDR works between 9.21 and 9.4, > > despite my (possibly erroneous) understanding of the documentation which > > indicates it won't work. > > Nope HDR requires the same binary executable. > > > > Thank you. > > > > DG > > > > > > > > > > "Madison Pruet" <mpruet@comcast.net> wrote in message > > news:E9ePc.198675$IQ4.11863@attbi_s02... > > > We support ER replication between version such as 7.3 and 9.4. However, > > you > > > will not be able to take advantage of all of the new functions with > mixed > > > levels. > > > > > > Be aware, the 7.3 replication groups do not exist with 9.3/9.4 and the > > > 9.3/9.4 replicate sets do not exist with 7.3. > > > > > > Also, you need to set CDRSITES_7.3 on the 9.3 server (see the release > > notes > > > or contact tech support for details.) > > > > > > M.P. > > > > > > "Wojtas" <wkorgol@nospam.gazeta.pl> wrote in message > > > news:ceivr6$edb$1@inews.gazeta.pl... > > > > Hello, > > > > > > > > I have 2 IDS 7.3/Uniware servers working with replication enabled. > > > > > > > > I would like to migrate one of them to 9.4/AIX and then to enable > > > > enterpsrise replication with the second IDS 7.3/Unixware server. > > > > > > > > I could not find unequivocal answer in Informix Enterprise Replication > > > > Guide. > > > > Is it possible? > > > > Could you give me please any advice? > > > > > > > > Thanks a lot, > > > > Wojtek > > > > > > > > > > > > > > > > > > > >