Re: Exports > 2GB -- need scripts

Chuck,

One note. Making the split files 2048M may cause a problem with 2G releases. I like it to be:   compress < expdat.dmp | split -b 2047m - export_f

Just for caution.

Cheers,

Earl

On Mon, 20 Nov 2000 10:10:28
 Chuck Hamilton wrote:
>
> If the datbase is 45g, I'd expect that the export will be over 2g even if compressed. Even if I compress with gzip which yields a better compression ration that compress, the best ration I get is about 4:1. He's going to need to both compress and split. Something like this would work.
>
>mkfifo expdat.dmp
>compress < expdat.dmp | split -b 2048m - export_
>exp us/pw parfile=exp.par
>
>To import an individual table however, you need to search through the entire export. That could take quite a long time. What I would recommend doing is to split the export up by table, tablespace, or table related groups of tables (related via FK's) and do individual exports of each. You could do them in parallel to speed it up. That way the export is granular enough that you can quickly recover an individual table without having to scan through a single huge export file.
>
> Allan Davis Sahadeo <asahadeo_at_neal-and-massy.com> wrote:
>I was wondering, if the size of the compressed file did exceed 2 gigs then
>we would indeed be in a bit of a predicament. Since an export does compress
>fairly nicely, we may not encounter such a problem. But what if we did...
>What would we do then ? Do we split our compressed files ? And if so how do
>we ?
>Allan.
>----- Original Message -----
>To: "Multiple recipients of list ORACLE-L"
>Sent: Friday, November 17, 2000 4:50 PM
>
>
>Here are the scripts for export and import:
>
>For export:
>mknod t1.dmp p
>compress < t1.dmp> t10.dmp.Z &
>exp us/pw parfile=exp.dat
>
>For Import:
>/etc/mknod t1.dmp p
>dd of=t10.dmp if=t1.dmp &
>imp us/pw parfile=imp.dat
>
>Ramani
>DBA
>
>>>> 11/17/00 01:25PM >>>
>
>I have a 45GB Oracle 8.0.5 database on HPUX. I want to be able
>to do nightly exports so that if any of the tables gets "accidentally"
>truncated or whatever, we can restore just the table and not
>have to restore the entire database.
>
>Does anybody have a script that uses the split(?) utility and
>compress so that the export isn't bigger than 2GB? What about
>importing? Can just one table be picked out of that large of
>an export if the export is split up and compressed? Please let
>me know your experience/advice on doing this.
>
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Received on Mon Nov 20 2000 - 13:43:59 CST