× News Cego SysMT Croom Web Statistics Impressum
SysMT Logo
Änderungsprotokolle

Im folgenden sind die letzten Änderungen der verschiedenen Softwarepakete aufgeführt.

Letze 10 30 100 1000 10000 Einträge

Kategorie Datum Version Eintrag
cego 27.01.2026 2.54.3 Version released
cego 27.01.2026 2.54.3 Another added in CegoQueryCursor, the previous patch must be modified in a way, that just for inner joins, the predicate is propagated to sub joins, otherwise ( left and right outer ) wrong evaluation may occur by a null value comparison effect. check126.sql has been added to show this effect
cego 26.01.2026 2.54.3 Added exception throw in CegoAdminThread::executeRestore, if tableset ticket was not found. The ticket is needed in any case and indicates, that the configured tableset root path matches with the root path in the ticket. The complete restore procedures will be described detailed in the online documentation.
cego 25.01.2026 2.54.2 Version released
cego 25.01.2026 2.54.2 Fix added in CegoQueryCursor::querySetup methods, _pJoinPred also has to be setup for left and right outer joins. An effect has been observed for the query below since a row is returned but should be not
select empid, e.ended from teacher t
left outer join employment e on t.tchid = e.tchid
where t.tchid = 1 and ( (e.ended is not null and e.ended < '01.01.1996' ) or e.ended > sysdate );
cego 24.01.2026 2.54.1 Version released
cego 24.01.2026 2.54.1 Changed tableset ticket handling for backup recovery. The tableset ticket now is consolidated by the restore command ( before by recover command ) and after restore, the tableset state is set to INCOMPLETE in case of an online backup.
cego 14.01.2026 2.54.0 Version released
cego 13.01.2026 2.54.0 Offline backup support added for admin console. An offline backup can be triggered now via backup admin commnd for tableset in status OFFLINE ( recovery procedure is the same as for online backups : restore tableset, recover tableset )
cego 12.01.2026 2.54.0 Reduction already done. Check suite passed without any errors. Still some code cleanup needed ...
cego 11.01.2026 2.54.0 Reduction of following classes done : CegoDistManager ( now CegoQueryManager ), CegoDistCursor ( now CegoQueryCursor ), CegoDbHander ( CegoDistDbHandler is obsolete ), just straight query handling is supported now, no more distributed queries
Reduction of admin classes done : CegoAdminHandler, CegoAdminThread, CegoAdmAction and friends, all mediator services have been consolidated to native admin services
Still some code cleanup needed, but already a huge amount of code has been removed.
cego 10.01.2026 2.54.0 Thoughts about redesign of cego mode started. The current design with mediator/primary/secondary with synchronous logging to secondary seems to be to complicated and fragile.
A new approach might be to make secondary recovery based on complete archive logfiles, which are copied from primary to secondary asynchronously.
The secondary host then must be controlled by himself ( no more mediator role ), so the complete database switch to secondary ist managed by an upper layer ( maybe not part of cego, since this also includes switch of a virtual host )
As a consequence, the cego mediator role will disappear ( just primary and secondary role are valid )
cego 09.01.2026 2.53.9 Removed PIDFILE attribute from db xml. PIDFILE should be specified by database startup with pidfile option
cego 03.01.2026 2.53.8 Version released
cego 03.01.2026 2.53.8 Small patch added to CegoAdminThread::getBackupInfo. Also empty logTS token are accepted now, since there might be still no archive logs avaiable for the backup
In tools/backupManager, LOGTS was set to None, if no archive logs are available
cego 01.01.2026 2.53.7 Version released
cego 01.01.2026 2.53.7 Cleanup and reduction of logging in CegoRecoveryManager
cego 31.12.2025 2.53.7 Small improvement added to CegoAdmin to catch non existing batchfile exception
cego 30.12.2025 2.53.6 Version released
cego 29.12.2025 2.53.6 Added point in time recovery option to restore nut just pit ( timestamp ) but also to a specified lsn. This might be useful to restore exactly to a specific log entry ( timestamp is given in seconds, where multiple operations may occur )
cego 29.12.2025 2.53.6 Added shiftactive mode for cego to rescue active online redo logs to archive destination. This is useful in case of online backup recovery after a crash, so before starting recovery, the current active online redo log can be explicit shifted.
With the shift, the latest LSNs are catched and a full recovery can take place.
Please note : This option is just useful, if there are uncorrupted online redo logfiles available after the crash.
cego 28.12.2025 2.53.6 Small improvements added to backupManager tool to evaluate next backup id ( now via shell function )
cego 26.12.2025 2.53.5 Version released
cego 26.12.2025 2.53.5 Crash consistency checks ( checkCrashAndRecovery with 20 runs and checkRandonCrash with 200 runs ) passed
cego 26.12.2025 2.53.5 Patch added in CegoDistManager::startTableSet, final checkpoint must be written after starting log, otherwise no logswitch will be done
cego 25.12.2025 2.53.5 Basic backup recovery with heavy load, concurrent online backup and recovery up to last committed lsn passed !
cego 25.12.2025 2.53.5 In CegoRecoveryManager, changed order in recovery procedure. Datafile recovery must be done after file registration, but before object registration.
File recovery restores bitmaps and pages on file level and object registration loads pages into bufferpool. So we first have to update data files ( via dataFileRecovery ) and then these pages are loaded to bufferpool ( via registerObjects ).
cego 24.12.2025 2.53.5 Basic tableset recovery from online backup works. To treat th e 0-LSN-Sync logic, several adaptions for CegoRecoveryManager were necessary. Still missing are extensive crash recovery tests
cego 24.12.2025 2.53.5 Set LSN for LOGREC_SYNC operations to 0. This is useful to simplify the recovery process especially for backup recoveries. With previous logic, LSN gaps occur in the archive log history file ( caused by LSN handling in CegoTableManger::insertDataTable with previous allocated LSN ) which result in incomplete recoveries.
The change to LOGREC_SYNC=0 had some impacts for logfile and recovery handling done in CegoLogThreadPool::copyLog, CegoDistManager::startTableSet and CegoLogManager::logAction
The new logic also avoids unnecessary archive logs with only LOGREC_SYNC operations, since these files are skipped by copyLog now. This new logic still has to be verified, especially in combination with online backups und subsequent recoveries
cego 23.12.2025 2.53.5 Added patch in CegoLogManager::logAction, logfile should be flushed if LOG_FULL occurs, otherwise it seems, that log entries get lost with subsequent log file switch ( still not verified )