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Incremental backup icin Block Change Tracking dosyası olusturmak

07:55 PM By Bugra Canbakal Leave a Comment

1.AMAÇ VE KAPSAM

Verilerimiz büyük ve backup alırken sorun yaşıyorsak Block Change Tracking (BCT) dosyasını oluşturup incremental backup alma işlemimizi hızlandırabiliriz.

2.UYGULAMA

2.1. Veritabanı BCT moddamı diye kontrol ediyoruz.

SELECT filename, status, bytes FROM v$block_change_tracking;

2.2. BCT mod’u aktifleştiriyoruz.

DATABASE { ENABLE | DISABLE } BLOCK CHANGE TRACKING USING FILE ‘/home/oracle/bctracking.log’;

2.3. Backup aldıktan sonra kontrol için

SELECT file#, avg(datafile_blocks), avg(blocks_read), avg(blocks_read/datafile_blocks) * 100 “Yedekleme Yüzdesi”, avg(blocks) FROM v$backup_datafile WHERE used_change_tracking = ‘YES’ AND incremental_level > 0 GROUP BY file#;

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Filed Under: Oracle, RMAN Tagged With: bct, block change tracking, oracle, rman

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