ontape restore problem
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Hi, everybody,
I've just run into a very strange issue with ontape restore.
We have a staging system, onto which we restore our production
'ontape' backup from time to time, so that QA team could test applications
in
environment close to the production.
Yesterday, after the restore, it appeared that one of most
active tables is corrupt with it's indexes.
The same table was not corrupt in the production database.
Investigation revealed, that table corruption was caused by the presence of
records,
that were added to the table by the QA team before the restore.
That is, during the restore, table pages allocated to the table
during the previous QA cycle, were mysteriously mixed with pages
restored from the archive.
Is it a known issue? Is it fixed in 9.40?
P.S. A saw very similar problem in the past with ONBAR restore:
is server is restored into the same chunks where Informix instance
was working before, logical restore might try to use traces of logical log
remaining from the previous life...
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Alexey Sonkin
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<p class=3DMsoNormal><font size=3D2 face=3DArial><span =
style=3D'font-size:10.0pt;
font-family:Arial'>Hi, everybody,<o:p></o:p></span></font></p>
<p class=3DMsoNormal><font size=3D2 face=3DArial><span =
style=3D'font-size:10.0pt;
font-family:Arial'><o:p> </o:p></span></font></p>
<p class=3DMsoNormal><font size=3D2 face=3DArial><span =
style=3D'font-size:10.0pt;
font-family:Arial'>I’ve just run into a very strange issue with =
ontape
restore.<o:p></o:p></span></font></p>
<p class=3DMsoNormal><font size=3D2 face=3DArial><span =
style=3D'font-size:10.0pt;
font-family:Arial'><o:p> </o:p></span></font></p>
<p class=3DMsoNormal><font size=3D2 face=3DArial><span =
style=3D'font-size:10.0pt;
font-family:Arial'>We have a staging system, onto which we restore our
production<o:p></o:p></span></font></p>
<p class=3DMsoNormal><font size=3D2 face=3DArial><span =
style=3D'font-size:10.0pt;
font-family:Arial'>‘<span class=3DGramE>ontape</span>’ =
backup from
time to time, so that QA team could test applications in<o:p></o:p></spa=
n></font></p>
<p class=3DMsoNormal><span class=3DGramE><font size=3D2 =
face=3DArial><span
style=3D'font-size:10.0pt;font-family:Arial'>environment</span></font></=
span><font
size=3D2 face=3DArial><span =
style=3D'font-size:10.0pt;font-family:Arial'> close to
the production.<o:p></o:p></span></font></p>
<p class=3DMsoNormal><font size=3D2 face=3DArial><span =
style=3D'font-size:10.0pt;
font-family:Arial'><o:p> </o:p></span></font></p>
<p class=3DMsoNormal><font size=3D2 face=3DArial><span =
style=3D'font-size:10.0pt;
font-family:Arial'>Yesterday, after the restore, it appeared that one =
of most<o:p></o:p></span></font></p>
<p class=3DMsoNormal><span class=3DGramE><font size=3D2 =
face=3DArial><span
style=3D'font-size:10.0pt;font-family:Arial'>active</span></font></span>=
<font
size=3D2 face=3DArial><span =
style=3D'font-size:10.0pt;font-family:Arial'> tables is corrupt
with it’s indexes. <o:p></o:p></span></font></p>
<p class=3DMsoNormal><font size=3D2 face=3DArial><span =
style=3D'font-size:10.0pt;
font-family:Arial'>The same table was not corrupt in the production =
database.<o:p></o:p></span></font></p>
<p class=3DMsoNormal><font size=3D2 face=3DArial><span =
style=3D'font-size:10.0pt;
font-family:Arial'><o:p> </o:p></span></font></p>
<p class=3DMsoNormal><font size=3D2 face=3DAria