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Incremental online backup

create a whole new copy of the DB, but "updates" an existing backup? This behavior would make backups ... is the incremental backup would not just update and replace the previous backup, but keep the diff from the previous ... just update and replace the previous backup, but keep the diff from the previous backup, allowing

Delete object from collection versus delete from JPQL

persist() to write them to the database. But does running a JPQL update or delete alter the in-memory ... , but I'm not sure if that will alter my program state. Will it? Thanks, Lee greymatter Lee Grey UPDATE ... queries UPDATE queries After using these queries you may use refresh, or discard cached objects in the EntityManager and in the L2 cache. support Support

TimeSeries and ObjectDB

, then add the new points, and then commit the whole timeserie again. I looked at Update queries ... . This could be efficient it terms of space and retrieval speed but may be more expansive in updates ... . frequency of retrieval / updates), what is the best model, and often a benchmark is required in order

Recommendation - concurrent access multiple class v

servers are taken offline, updated, then put online. The remaining 2 servers are also updated. --- I can't update all 5 of them in the same time, because it must be no downtime for the current

Query becomes slower on moving from ObjectDB 1.x to ObjectDB 2.x

after conversion" Does it mean that, before conversion, i need to do the following steps 1. Update ... the following steps 1. Update the package.jdo with an index defined 2. Convert the old odb file 3. Connect ... . Update the package.jdo with an index defined 2. Convert the old odb file 3. Connect to database

new objects not available in mappedBy associations

This seems to be the normal behavior - according to JPA the application has to update both sides in order to have a synchronized bi-directional relationship. In practice, however, the mapped side will be updated ... after the transaction is committed (or after the update and before commit, if your EntityManager

Use temporary files to enable very large transactions

? What combination of DELETE / INSERT / UPDATE operations are in that huge transaction? Can we assume ... / UPDATE operations are in that huge transaction? Possible is every combination. Can we assume single ... of temporary files in large update queries. Still, this should be enabled by setting a system property

ObjectDB 2.5.6

. Fixed an exception (NullPointerException) in update queries (since 2.5.5_12). Fixed a NullPointerException in query compilation. Fixed a memory leak (Negative snapshot user count) in UPDATE queries ... classes). Fixed a bug of unexpected change of primary key type in UPDATE queries. Fixed some bugs in

Negative snapshot user count exception

:05:23 #188 *] transaction Id = 506009, new file size = 297009152, dirty pages = 1, update list s ... information? FastModel Ben Schreiber Discussion was moved to a private support ticket. Update: Apparently ... message in this case. Update: The original error message "Negative snapshot user count" is also reported

database corrupt

" /> <index-update enabled="true" priority="40" /> <query-cache results="4096mb" programs="500 ... . support Support thanks for the update, we change accordingly. this issue is just happening ... of your application with ObjectDB work properly? UPDATE: You already answered these questions just now. support Support

Getting Started

ObjectDB is very easy to use. Follow the Getting Started Tutorial and the Quick Tour manual chapter and in minutes you may be able to write and run first Java programs against ObjectDB.

Prior knowledge or experience in database programming (SQL, JDBC, ORM, JPA, etc.) is not required, but some background in using the Java language is essential.

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