export error


Question:
EXP-00056: ORACLE error 1555 encountered
ORA-01555: snapshot too old: rollback segment number 1 with name "_SYSSMU1$" too small

The above error is related to rollback segement and retention period but my question is

if i receive this error during export what about the dump file will it contain the data or it is currupted.
LVL 28
imran_fastAsked:
Who is Participating?
I wear a lot of hats...

"The solutions and answers provided on Experts Exchange have been extremely helpful to me over the last few years. I wear a lot of hats - Developer, Database Administrator, Help Desk, etc., so I know a lot of things but not a lot about one thing. Experts Exchange gives me answers from people who do know a lot about one thing, in a easy to use platform." -Todd S.

ramumorlaCommented:
This is due to a Oracle BUG  (Bug 2666174  Export in direct path can product a corrupt export file if ORA-1555 occurs
)

If direct path export hits an ORA-1555 "snapshot too old ..." error
then the export file may be corrupted by having an "end of table"
marker in the middle of a row.

Workaround:
  Regenerate the export file.

0

Experts Exchange Solution brought to you by

Your issues matter to us.

Facing a tech roadblock? Get the help and guidance you need from experienced professionals who care. Ask your question anytime, anywhere, with no hassle.

Start your 7-day free trial
imran_fastAuthor Commented:
i cannot regenerate export file because the data is currupted.
Can i import part of table from the export file. can you provide me with the syntax.
0
johnsoneSenior Oracle DBACommented:
My first question is was this a direct path export?  Can you show the command you used to export the data?

Did you supply CONSISTENT=Y?  If so, then the export probably terminated when the error was received and the file is missing anything after that and a partial import up to the error may be possible.

If you did not supply CONSISTENT=Y then only the table(s) where this error occurred would have truncated data and anything after them should be OK.

It has been a while since I got this on an export, so I don't remember exactly how it behaves, but I believe this is the way it should work.
0
It's more than this solution.Get answers and train to solve all your tech problems - anytime, anywhere.Try it for free Edge Out The Competitionfor your dream job with proven skills and certifications.Get started today Stand Outas the employee with proven skills.Start learning today for free Move Your Career Forwardwith certification training in the latest technologies.Start your trial today
Oracle Database

From novice to tech pro — start learning today.