Our standby databases are 10+TB and take 6-8 hours locally throttled with 10ge connections and can take a few days across a shared private 1ge link several states away. I could never imagine rebuilding these databases with data pump. Kenny On Jun 6, 2014 6:06 PM, "Jeremy Schneider" <jeremy.schneider@xxxxxxxxxxxxxx> wrote: > I've been doing a lot with rman recently. Data pump is probably the > simplest thing since it's all logged and the standby automatically stays in > sync. But if you're doing a large database (hundreds of GBs or some TBs) > then this may not work. In my experience, building the standby over the > network from the active primary only works for smaller databases - as far > as I can tell it doesn't do any compression or other optimization of the > data sent over the wire and takes forever. For large databases I've had the > best luck with running a one-off rman backup, copying the files across with > rsync, then doing a restore on the far side. Have to manage logs carefully > since you'll need them all to catch up the standby. But I've managed to > build a multi-TB standby this way over a not-so-great WAN link. Took a few > days. :) Sounds tedious but it's not bad at all once you've done it a few > times. If this won't work then the only other technique I know is driving > or overnighting hard drives. > > Always interested to hear what others think to! > > -Jeremy > > -- > http://about.me/jeremy_schneider > Sent from my iPhone > > On Jun 6, 2014, at 2:30 PM, Scott Canaan <srcdco@xxxxxxx> wrote: > > I did try this a couple of times and got errors and it would never > complete. It might have been due to the network. > > > > Scott Canaan ’88 (srcdco@xxxxxxx) > > (585) 475-7886 – work (585) 339-8659 – cell > > “Life is like a sewer, what you get out of it depends on what you put into > it.” – Tom Lehrer > > > > *From:* Kenny Payton [mailto:k3nnyp@xxxxxxxxx <k3nnyp@xxxxxxxxx>] > *Sent:* Friday, June 06, 2014 3:28 PM > *To:* Scott Canaan > *Cc:* oracle-l@xxxxxxxxxxxxx > *Subject:* RE: Question On Data Guard And Database Refreshes > > > > I got the idea originally, as well as example scripts, from the Oracle > Press book Oracle Data Guard 11g. > > It doesn't require previous RMAN backups so you don't have to worry about > not using it now. Essentially it's duplicating the database across the > network using RMAN. > > Just be careful not to overrun your network connections if you're not > using separate and dedicated network interfaces for data guard. > > Kenny > > On Jun 6, 2014 3:19 PM, "Scott Canaan" <srcdco@xxxxxxx> wrote: > > Yes, that might work. We don’t use RMAN now because it doesn’t work nice > with our current backup system. That’s why we aren’t using it for the > refresh. > > > > Scott Canaan ’88 (srcdco@xxxxxxx) > > (585) 475-7886 – work (585) 339-8659 – cell > > “Life is like a sewer, what you get out of it depends on what you put into > it.” – Tom Lehrer > > > > *From:* Kenny Payton [mailto:k3nnyp@xxxxxxxxx] > *Sent:* Friday, June 06, 2014 3:19 PM > *To:* Scott Canaan > *Cc:* oracle-l@xxxxxxxxxxxxx > *Subject:* Re: Question On Data Guard And Database Refreshes > > > > If you're refreshing a significant part of sizeable databases you might > find it more efficient to automate RMAN duplicate across the wire. > > Kenny > > On Jun 6, 2014 1:36 PM, "Scott Canaan" <srcdco@xxxxxxx> wrote: > > We have dived into the world of Data Guard and have it working nicely. > Periodically, we get requests to refresh a test database from production to > get “up-to-date” data in test. If both production and test are Data > Guarded, what is the best way to do the refresh? We would like to not to > have to rebuild the test secondary database if at all possible. We don’t > use RMAN for backups. We are looking at using Data Pump between production > and test and letting Data Guard update the secondary from there. > > > > Is there a better way, without purchasing a tool? > > > > We are using Oracle 11.2.0.3 on Red Hat Linux. > > > > Thank you, > > > > Scott Canaan ’88 (srcdco@xxxxxxx) > > (585) 475-7886 – work (585) 339-8659 – cell > > “Life is like a sewer, what you get out of it depends on what you put into > it.” – Tom Lehrer > > > >