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To bring up the web browser, type the following address in your web server s address bar: https:/localhost. When the security alert box appears, click OK (this box appears because the Oracle Backup Web Interface installs a self-signed security certificate, and thus is unknown to the web browser). You ll then see the Oracle Backup Login page. Since this is the first time you re logging in, use the username admin and leave the password blank. Once you log in successfully, you ll see the Oracle Backup home page. On this page, you can perform four major activities using the Oracle Backup Web Interface: configure, manage, backup, and restore operations.

The word fanout is borrowed from the digital-logic world, where it indicates the maximum number of inputs an output signal can be connected to. With hardware logic, fanout is a function of input and output impedances, but such details are beyond the scope of this book. In the software world, fanout denotes the maximum number of receivers a sender is capable of sending a notification to. There are two important cases of fanout: 1. One 2. More-than-one When the fanout is one, the event notification is said to be unicast: The notification can only be sent to one receiver. If a second receiver subscribes, it generally preempts an existing subscription, effectively stealing the notification from the prior subscriber. When the fanout is more than one, the event notification is said to be multicast: The notification can be sent to multiple subscribers. The upper limit of subscribers supported is implementation-dependent

When you install Oracle Secure Backup, it creates default users, hosts, devices, classes, and the null media family. You can choose to use the defaults or configure your own entities, as described in the following sections.

You must have separate users with privileges to use the Oracle Secure Backup utility. You can add, modify, and remove users through either the Oracle Backup Web Interface tool or the obtool commandline interface. These users can be the same as some of your Oracle users if you wish. Classes assign a set of access rights or privileges to users who perform backups and restore operations. Oracle Secure Backup uses the following classes: admin: For overall administration of a domain operator: For standard day-to-day operations oracle: For specific database privileges reader: For viewing index information user: For allowing specific users to interact in a limited way with their domains

and often not defined Note that the fanout only indicates the number of subscribers that can be supported, not the number of actual subscribers present A multicast notification might have zero, one, or more actual subscribers There are two basic ways to handle multicasting: at the network level and at the application level Network-level multicasting has been available for several years It relies on IP multicasting,23 which is handled at the networking packet level by routers While early IP multicasting was based on a broadcast model, reliability was addressed by later protocols, such as SRM24 and RMTP25 IP multicasting is based on the notion of group addresses, which identify an address space of members When a datagram is sent to the group address, all members receive it There are two problems regarding the use of IP multicasting to handle one-to-many delivery: 1.

Hosts are the server machines that host the Oracle Secure Backup tool. You can distinguish between two types of hosts, based on their access mode: Ob host: These are servers on which Oracle Secure Backup components run in the background as daemons. These daemons participate in managing the backup and restore operations. Network Data Management Protocol (NDMP) host: This is a storage appliance from a thirdparty vendor. An NDMP host implements the NDMP protocol and employs NDMP daemons instead of Oracle Secure Backup daemons to back up and restore files.

Devices include both tape drives and tape libraries. A library is a medium changer that accepts commands to move media between storage locations and tape drives. Following are the basic components of libraries: Storage element (se): Contains a volume when it is not in use Import-export element (iee): Moves volumes into and out of the library without opening the door and is physically present only on certain libraries Medium transport element (mte): Moves a volume from a storage element to a drive Data transfer element (dte): Represents a tape drive