ODS (on-disk structure) is a number representing version of the database physical layout structure. When a new feature is added to the Firebird it might or might. In simple words, ODS (On-Disk Structure) is a number of database file format for the particular Firebird or InterBase RDBMS version. Almost all. Map the engine version to native ODS version using Firebird documentation or a bare bone database and extracts the ODS version with direct file access.
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Its option -h outputs the header page information, which contains the ODS: The implemented solution has no additional storage overhead until the transaction counters grow beyond the 2 32 boundary. It depends on various options that are known only when actually doing something. Sign up using Email and Password. Changes to Client Address Reporting.
What is ODS version and how to retrieve it?
Later, it could be extended up to the 2 63 limit. ODS on-disk structure is a number firdbird version of the database physical layout structure.
Historically, transaction ID space was limited to 2 31 transactions, counted from the time the database was created. If gstat will not understand read information, it will show corresponding message — what it expected, and what it found.
What is ODS version and how to retrieve it? | firebird Tutorial
In order to work with a database with an older ODS it will be necessary to make a backup using gbak under the older server and restore it with gbak on Firebird 3. Even if you tried to backup on the old server and restore at new, and it worked — never trust this. Changes to System Tables. That is not going to work, because Firebird 2.
Cross-platform copying of any ODS If you haven’t used any new features of server X version of InterBase or Firebirdso you may return to X-1 following these steps:.
Sometimes server may upgrade old ODS to some newer one, without notification. Post as a guest Name. Maximum database size is increased to 2 32 pages previously 2 31 pages. When a new feature is added to Firebird it might or might not require the structure of database pages or system tables database metadata to change.
All Firebird and InterBase On-Disk-Structure (ODS) versions
If it does, the ODS number must increase. To learn more, visit our add content page. ODS on-disk structure version is a number representing version of the database low-level data layout structure ODS. So, migration will be easier if you have not used features since InterBase 7.
How to return to the previous version of Firebird or InterBase Sometimes, you may require performs a downgrade and return back from the new server. There’s no way to know it upfront. Operating system user name.
But there are some limitations, which will be described further.