1. CERN IT Department CH-1211 Geneva 23 Switzerland www.cern.ch/i t Eva Dafonte Perez IT-DB Database Replication, Backup and Archiving

2. CERN IT Department CH-1211 Geneva 23 Switzerland www.cern.ch/i t Overview Current status, medium-term and future plans for Data replication Backup solutions Archiving Database Replication, Backup and Archiving - 2

3. CERN IT Department CH-1211 Geneva 23 Switzerland www.cern.ch/i t Data Replication current status Using Oracle Streams –Normal setup between online and offline databases –Downstream database setup between offline and Tier1 sites databases –ALICE, ATLAS, CMS, LHCb and COMPASS –Different sets of data: Conditions, PVSS, LFC, muon calibration and AMI –Main concerns: Sensible to ”human errors/actions” and database load Resynchronization procedures Database Replication, Backup and Archiving - 3

4. CERN IT Department CH-1211 Geneva 23 Switzerland www.cern.ch/i t Data Replication current status ATLAS Conditions, PVSS, Muon Calibration and AMI ATLAS Conditions, PVSS, Muon Calibration and AMI LHCb Conditions and LFC LHCb Conditions and LFC ALICE & COMPASS PVSS ALICE & COMPASS PVSS CMS Conditions and PVSS CMS Conditions and PVSS

5. CERN IT Department CH-1211 Geneva 23 Switzerland www.cern.ch/i t Data Replication plans for 2012 Several technologies tested –Streams 11g –Golden Gate –Active Data Guard (ADG) Database Replication, Backup and Archiving - 5

6. CERN IT Department CH-1211 Geneva 23 Switzerland www.cern.ch/i t Data Replication plans for 2012 Streams replacement with ADG for CMS and ALICE No changes (Streams 11g) for ATLAS, LHCb and COMPASS 6 ONLINE DATABASE OFFLINE DATABASE ONLINE STANDBY OFFLINE STANDBY STREAMS Conditions + PVSS ACTIVE ONLINE STANDBY Conditions and PVSS reader sessions Other OFFLINE reader sessions Conditions and PVSS reader sessions ONLINE DATABASE CMSALICE OFFLINE DATABASE STREAMS PVSS ONLINE STANDBY ACTIVE ONLINE STANDBY PVSS reader sessions PVSS reader sessions

7. CERN IT Department CH-1211 Geneva 23 Switzerland www.cern.ch/i t Data Replication future plans @CERN: move to ADG all replication setups between online and offline databases @Tier1 sites: decision will depend on –Replication technologies evolution –Experience gained Database Replication, Backup and Archiving - 7

8. CERN IT Department CH-1211 Geneva 23 Switzerland www.cern.ch/i t Backup current status Home made solution, based on Oracle RMAN Nowadays relying on IBM Tivoli (tape) –Performance issues –Best effort service (no HA solution) Automatic test of DB recoveries Standby databases –Disaster recovery –Asynchronous transport mode (no influence on primary database performance) –Allows to recover from human errors (within the existing lag – few hours) Database Replication, Backup and Archiving - 8

9. CERN IT Department CH-1211 Geneva 23 Switzerland www.cern.ch/i t Backup plans for 2012 Moving backup and recovery management to an unified tool inside the group Replace on-disc database copies by snapshots (new hw) Starting evaluation of a disc based solution for backup sets repository –Replacement of Tivoli –File-system backups to tape Move backups to run on standby databases –Offload primary databases Database Replication, Backup and Archiving - 9

10. CERN IT Department CH-1211 Geneva 23 Switzerland www.cern.ch/i t Archiving current status and future plans Goal: avoid that DB growth impact manageability and performance Archive databases available for ATLAS and CMS Joint work with experiments/development to identify and prepare the applications –Partitioning + indexes –Separate tablespaces per period (quarter, year, …) Extension to other applications/databases Database Replication, Backup and Archiving - 10

11. CERN IT Department CH-1211 Geneva 23 Switzerland www.cern.ch/i t Questions?