Most of the database backups will be Oracle databases. Currently we do not have the option of using TDP, so we will either take hot or cold database backups. If space permits we will backup to disk first then start the dsmc. The main database recovery requirement is consistency between files, so the restored files must all come from the SAME backup.
Daniel Sparrman <[EMAIL PROTECTED]>@VM.MARIST.EDU> on 29/04/2002 14:37:05 Please respond to "ADSM: Dist Stor Manager" <[EMAIL PROTECTED]> Sent by: "ADSM: Dist Stor Manager" <[EMAIL PROTECTED]> To: [EMAIL PROTECTED] cc: Subject: Re: archive or incremental backup type Hi Incremental = Minimizes your backup window, as only changed files are moved. However, you could activate subfile backup, which means that only the changed part of the file is backed up. Incremental works best with smaller files, as large files requires that the complete file is backed up. Subfile cache would perhaps work good also with large files, as only the changed part of the file is backed up. However, normlly a database doesn't work as ordinary large file, as there is to much changes in the "file". Archive = Best for storing files for a specific amount of days/month/years. However, archiving is like doing full backups all the time, which makes a cost in backup time. Normally for databases, you use a TDP to minimize the time required for backup. Different types of TDP:s have different ways of backing up; differential, incremental, log archiving, full backups and so on. But, if you do hot backups, it's recommended to use TDP:s, as a file backup client doesn't work 100%(some files may have been locked by the application during the backup. This can be solved by using Dynamic setting, but this doesn't automatically mean 100% consistency when trying to restore). It would be easier to do a recommendation if you told us what kind of application you are using. For some applications, doing incremental/archiving works great, for some it's a disaster. If you still insist on using file backup/archive client, I'd recommend using cold backups, using archive. This could be done on perhaps a weekly basis. Best Regards Daniel Sparrman ----------------------------------- Daniel Sparrman Exist i Stockholm AB Propellervägen 6B 183 62 HÄGERNÄS Växel: 08 - 754 98 00 Mobil: 070 - 399 27 51 George Harding <[EMAIL PROTECTED]> Sent by: "ADSM: Dist Stor Manager" <[EMAIL PROTECTED]> 2002-04-29 10:51 Please respond to "ADSM: Dist Stor Manager" To: [EMAIL PROTECTED] cc: Subject: archive or incremental backup type I would like to get some advice on the advantages / disadvantages of archive versus incremental backup types. The files I am backing up are database files so in general are large and need to be restorable to point in time for consistency. Thanks