expdp/impdp 1TB data from one schema user to another without creating file

I need to export an entire large 1TB schema an import it into a different schema
development is changing the owner.

the file is too large to export to a file system

is there any way to do this in oracle 10g?
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bkreynolds48Asked:
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slightwv (䄆 Netminder) Commented:
If you are using Unix you can used named pipes.

If not, you might be able to use datapump import with network_link and remap_schemas and a loopback database link.

I've never used network_link with datapump imports but in theory it should be possible.

Named pipes would likely be the simplest.

From one window:
mknod -p mypipe
exp userA/password owner=userA file=mypipe


Then from another window:
imp userB/password file=mypipe full=y
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slightwv (䄆 Netminder) Commented:
Looks like impdp with network_link is possible.

Here's a link that says it works:
http://learnwithme11g.wordpress.com/2012/06/07/copy-schema-into-same-database-with-impdp/
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DavidSenior Oracle Database AdministratorCommented:
How is the schema currently being backed up? Can you pull from a backup copy?

Must the source schema be active (users) during the pull?

Say more about "development is changing the owner" -- not clear.  Are you needing to replicate a production instance into a new development instance?  

Is the target schema on the same database instance (SID); on a different host; different timezone; different character set?

Subject to the above answers, my recommendation is Transportable Tablespaces. In effect, taking the logical set of data files and copying them.  They have been around since 8i, and are very easy on the system resources.  Downside, you would need to replicate the non-tablespace objects (jobs, types, etc) as a separate step.  IOW, read, and plan well.

http://docs.oracle.com/cd/B19306_01/server.102/b14231/tspaces.htm
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bkreynolds48Author Commented:
I'll check these options out and see if they work
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bkreynolds48Author Commented:
we are trying this one

thanks
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