Novell OPEN ENTERPRISE SERVER 2 SP2 - ADMINISTRATION, Руководство по внедрению, Страница: 246 / 288

246 OES 2 SP2: Planning and Implementation Guide
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Understanding SMS
Novell Storage Management Services (SMS) is not a backup application. Rather, it provides a
standard framework and the necessary interfaces that can be used in developing a complete backup/
restore solution. SMS helps back up file systems (such as NSS) on NetWare 6.5 SP8
®
and OES 2
servers to removable tape media or other media for offsite storage.
SMS is implemented as two independent components that provide functional abstractions:
Š
Storage Management Data Requestor (SMDR) defines the API framework, provides remote
connectivity, and abstracts the details of communication between servers.
Š
Target Service Agent (TSA) provides an implementation of SMS APIs for a particular target.
The TSA provides transparency by abstracting details of the specific service being backed up.
For example, various applications use the file system TSA to back up and restore NSS file
system data and metadata (trustee assignments, file attributes, and name spaces).
SMS Coexistence and Migration Issues
In OES 2, the SMS API framework is available on SLES 10 so that there is a single consistent
interface to back up file systems on NetWare, file systems on Linux, and Novell applications such as
GroupWise
®
and Novell iFolder. The API set has been enhanced to include new functionality for
OES.
Most of the SMS coexistence and migration issues are of concern only to backup application
developers. However, administrators should be aware that SMS-based applications must be used to
back up and restore NSS file system data on OES servers. Although NSS is exposed as a Virtual File
System-compliant file system, the Linux interfaces are inadequate to back up NSS file system
attributes, rich ACLs, trustees, and multiple data streams.
For additional information, see “ Coexistence and Migration Issues ” in the OES 2 SP2: Storage
Management Services Administration Guide .
D.2.3 SLES 10 Backup Services
Two SLES 10 services might be of interest.
Š
DRDB: This lets you to create a mirror of two block devices at two different sites across an IP
network. When used with HeartBeat 2 (HB2), DRBD supports distributed high-availability
Linux clusters. For more information, see
“Installing and Managing DRBD Services” (http://
www.novell.com/documentation/sles10/stor_evms/data/drdb.html) in the SLES 10 SP3:
Storage Administration Guide (http://www.novell.com/documentation/sles10/stor_evms/data/
bookinfo.html) .
Š
rsync: This is useful when large amounts of data need to be backed up regularly or moved to
another server, such as from a staging server to a Web server in a DMZ. For more information,
see
“Introduction to rsync” (http://www.novell.com/documentation/sles10/sles_admin/data/
sec_net_sync_rsync.html) in the SLES 10 SP3: Installation and Administration Guid e (http://
www.novell.com/documentation/sles10/sles_admin/data/sles_admin.html) .