Re: Is anyone doing replication on 7.3.4?

We have Read only Replication from 7.3.3.6 (Master Site on open vms) to = 8.1.5 (Slave Site Sun Solaris). Initial Setting was very tricky and = painful. As mentioned there were numerous occasions when Fash refresh = would fail for no apparent reason. =20

If the Master Site is down for maintenance / Backup, the SNP process keeps = trying and it never completes the refresh even when the Master site would = come up. There were times when the Snapshot tables in the Slave site = would be truncated. So we got rid of the SNP process and the refresh = groups. =20

We are using Cron Jobs to do the refresh by writing shell scripts three = times daily and it has been working great. Also one relevant issue that = the schema owner for the Master and Slave site should be exactly the = same.=20

Ramani
DBA >>> <CHUCK_HAMILTON_at_qvc.com> 05/22/00 01:16PM >>>

My experience with replication was a couple of years ago with snapshots = and
I wouldn't use it again. There were too many problems trying to keep the snapshots in sync. Fast refresh snapshots were constantly getting out of sync and thinking they needed a full refresh when such was not the case. = If
I were doing it now, I'd create a standby database and open it in read = only
mode. When you want to refresh it, put it back into recovery mode to sync it with production, then put it back in read only mode.

As a side note, one of my colleagues recently went to a class that = included
replication and the they (instructor included) were never able to get the database to replicate properly even in a classroom setting. Doesn't sound like it works any better now than 3 years ago when I tried it.

--
Chuck Hamilton
QVC Inc.
Enterprise Technical Services
Oracle DBA


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I have been asked to look into creating a read only replicated database =
for
reporting purposes.  Can anyone tell me if they have done this?  I am
interested if there is a performance hit when replication is implemented.
How much time should I expect to dedicate to replication on a fairly large
online production system?  Is the replication software free?  Has anyone
used Quest's Shareplex?

Thanks!
Ron Smith
Database Administration
rlsmith_at_kmg.com=20







--
Author: Smith, Ron L.
  INET: rlsmith_at_kmg.com=20

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