NetBackup Basic Terms 1. Types of Backups: -> Full Backup: Backs up everything. It is time consuming and is not practical to take on a daily basis. Disk space is always limited. They are typically done once a week. -> Differential Backup: Backs up everything that has changed since last full backup. For example, suppose you do a full back up on Sunday. On Monday you back up only the files that changed since Sunday, on Tuesday you back up only the files that changed since Sunday, and so on until the next full backup. Differential backups are quicker than full backups because so much less data is being backed up. But the amount of data being backed up grows with each differential backup until the next full back up. -> Incremental Backup: Backs up everything that has changed since last full or last differential backup. Incremental backups also back up only the changed data, but they only back up the data that has changed since the last backup —be it a full or incremental backup. They are sometimes called "differential incremental backups," while differential backups are sometimes called "cumulative incremental backups." 2. Master Server: is the "brains" for all data protection activities, from scheduling and tracking client backups to managing tape media and more. The master server is the one that contains your Netbackup Database. So it needs lots of disk space and some power. It has the database that runs the schedules and keeps track of tape drives and other backup devices. It also keeps track of media servers. (If it is a Unix master - it can send all Unix clients new versions of the software). There can be only one master server in a backup domain. 3. Media Server: A media server (a master can also be a media server) does backups. It has tape drives or backup disk devices, and talks to clients, gets the data from them and puts the info onto the backup device. Does not need as much disk space on the actual server for the net-backup software as a master. But does need a good network connection and some power. It also sends to
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- Fall '18
- Wing Wah
- Magnetic tape data storage, Net Backup