Database gets partially corrupted in the "no-reserve" mode
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Key: CORE-5329
URL: http://tracker.firebirdsql.org/browse/CORE-5329
Project: Firebird Core
Issue Type: Bug
Components: Engine
Affects Versions: 3.0.0
Reporter: Dmitry Yemanov
If a "no-reserve" (aka "use full space") option was enabled for a v2.5
database, then the issue becomes visible right after restore on v3.0, just do
an immediate validation and see:
Summary of validation errors
Number of database page errors : 90167
Then check firebird.log and see:
solaris Sat Aug 13 18:01:28 2016
Database: /work/data/abc.fdb
Error: Page 1017 wrong type (expected SCN inventory encountered
purposely undefined)
solaris Sat Aug 13 18:01:28 2016
Database: /work/data/abc.fdb
Error: SCN's page 1017 {sequence 1} inconsistent
solaris Sat Aug 13 18:01:28 2016
Database: /work/data/abc.fdb
Error: Page 2034 wrong type (expected SCN inventory encountered
purposely undefined)
solaris Sat Aug 13 18:01:28 2016
Database: /work/data/abc.fdb
Error: SCN's page 2034 {sequence 2} inconsistent
and so on. Only SCN pages are corrupted, they are all unexpectedly zeroed.
It means that only incremental restore is affected by this issue, basically the
database operates OK. A short-term workaround is: gfix -use reserve +
backup/restore.
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