A couple of years back I did a migration from 10.1 Solaris Sparc to 10.2 Linux. Datapump did a cracking job of shifting around 100GB of data. I reckoned around 3x as fast at importing as the old exp/imp method. Don't discount transportable tablespaces, particularly if you are not having to change endianness. I think transportable tablespaces are probably the fastest method of all for this type of migration. jason. -- http://jarneil.wordpress.com On Thu, Jul 31, 2008 at 6:37 PM, Bala <oratips@xxxxxxxxx> wrote: > Thank you very much for your thoughts. There is flexibility schedule wise > -- hardly any constraints -- I was thinking of datapump , but would revisit > good ol' exp/imp... > > Thanks again! > > > On 7/31/08, Allen, Brandon <Brandon.Allen@xxxxxxxxxxx> wrote: >> >> My preference is to always use exp/imp unless there is a good reason not >> to do so, e.g. uptime requirements. Export followed by import into a brand >> new database gives you a nice clean data dictionary with that fresh new >> 10.2.0.4 smell, plus you get a full defrag of all your segments as a >> bonus (not that I'm a proponent of regular segment rebuilds) and can take >> the opportunity to change your tablespace layout or configurations if >> desired. There are at least a few serious bugs that can hit after in-place >> upgrades (*not* if you use exp/imp) – check Metalink for details. The >> ones I'm thinking about are specific to databases that were upgraded from 8i >> to 10g, IIRC. Since you're on 10g, expdp/impdp could be worth considering >> too, but from what little testing I've done with datapump, it was much >> slower and more complicated than good 'ol exp/imp. >> >> >> >> Regards, >> >> Brandon >> >> >> > > > > -- > Bala Rao