About recovery
Database Management Settings
Explains settings and performance tuning of the ObjectDB Java object database for JPA/JDO.... resize = "256kb" page = "2kb" /> <recovery enabled = "true" sync = "false" path = "." max ... The <size> element The <recovery> element The <recording> element ...
Database Transaction Replayer
Explains how to use the ObjectDB object database Replayer tool to restore recorded Java/JPA/JDO actions.... for two different purposes: It enables recovery from a database failure by replaying the recorded operations. ...
Online Backup
Online Backup enables backing up an ObjectDB database while it is in active use by applications. The ability to create a backup while the system is running is essential in applications and services that have to be available 24/7/365. An ObjectDB database can be backed up by simply copying or archiving the database file while the database is offline (i.e. when it is not open in an ObjectDB server and not in use by any application), since an ObjectDB database is stored as an o ...
Database Replication and Clustering
Replication enables maintaining up to date version of an ObjectDB database on multiple nodes.... high availability, fault tolerance and prompt disaster recovery. In master-slave replication the master node manages the main ...
Exception on the recovery of a database
I've also had this similar exception on the recovery of a database: ... I've had this exception on the recovery of a database: [2011-11-06 04:33:41 #19 store] Exception during recovery of ... reflect a normal situation in which the last record in the recovery file is incomplete. In that case the last record is ignored (since it ...
best practice for DB recovery
Hi, I'm trying to come up with the best approach for supporting some kind of hot standby for my master DB. ... Basically, I have the master DB running with recording and recovery enabled and have a number of applications connecting to it. I realize ...
Replicated cluster recovery
If I create a replicated database cluster as per http://www.objectdb.com/java/jpa/tool/replication what is the behaviour of the master database after a failure? For example, say I have MasterDB and SlaveDB in the cluster. If MasterDB goes offline the application will automatically switch to SlaveDB. When MasterDB comes back online it will have missed any activity that occured during the downtime. #1 2011-04-08 16:07 If I create a replicated database cluster as per http://www.objectdb.com/java/jpa/tool/replication what is the be ...
Safe Settings
Hi, I am trying to set up ObjectDb in a safe way that allows turning the machine off while database transactions are running. I would like to test if things are really safe and if I don't get corrupted database files in any possible case. I found "recovery" and "recording" in the objectdb.conf file. Which one is safer to use? I suppose I should turn on sync="true", right? ... database files in any possible case. I found "recovery" and "recording" in the objectdb.conf file. Which one is safer to ... ObjectDB provides 2 separate mechanisms for recovery from failure: Recording (transaction log). ...
ObjectDB Object Database Features
ObjectDB provides a rich set of features, many of them as the result of supporting the JPA and JDO APIs.... Recovery from failure by using a recovery file and double writing. ...
How to upgrade from ObjectDB 1.0?
Explains how to upgrade from ObjectDB 1.0 to ObjectDB 2.0.... and until then changes might be applied only to the recovery file . ObjectDB 2.0 uses optimistic transactions by default (the ...
