NetWorker 6 - Backup software
Business-Critical Data Protection
The NetWorker Solution
NetWorker protects the critical business data of more than 10,000 enterprise customers worldwide by simplifying, centralizing, and automating backup and recovery operations across Unix, Windows, Linux and NetWare platforms in DAS, NAS, and SAN storage environments. Built upon an open, highly scalable client-server architecture, NetWorker reduces management overhead by providing "lights out" protection of storage assets in the largest corporate data centers and the smallest satellite branch offices.
Advanced indexing and media management, cluster support, high speed parallelism, tape interoperability, comprehensive NDMP support, DiskBackup, tape cloning, archive, serverless backup, and dynamic drive sharing are among key components the enable administrators to protect storage assets and minimize downtime.
Database, messaging and ERP modules deliver online protection and granular recovery. Storage Nodes enable load sharing and distribution of backup traffic, and LAN-free protection of servers with large data volumes. Autochanger/Silo modules enable hands-free protection using a wide variety of robotic devices. NetWorker is also tightly integrated with complimentary applications such as hierarchical storage management (HSM), systems management frameworks, simplified operator administration, and web-enabled management of multiple NetWorker servers.
With NetWorker, companies and organizations can standardize on one application to provide complete, fast, and reliable protection of business-critical information across a heterogeneous enterprise, resulting in lower downtime costs, less management overhead, and greater ROI of storage resources.
NetWorker 6.0 Frequently Asked Questions
|With the release of NetWorker 6,
customers will find some significant enhancements and
changes to how they may manage their NetWorker environment.
The purpose of this document is to highlight some of the
major feature changes that have taken place since the
release of NetWorker 5.x and sources of information where
NetWorker users may go for answers.
|Q: What are the new features and
enhancements of the NetWorker 6 release?
|A: Technical enhancements of NetWorker 6 over previous releases can be summarized as follows:
Improved Availability & Scalability
- New Indexing Architecture
- Improved browse and retention policies
- Expanded NetWorker data format (64 bit)
- Support for NetWorker Image Backup
- Extensive Cluster support (Client
& Server) for Legato Cluster, Sun Clusters, MC
ServiceGuard, Compaq TruCluster, and Microsoft Cluster
Expanded SAN/NAS support
- NDMP-based backups supported
- Library Sharing within a data zone
- SAN/NAS Storage Node support
Expanded Platform Support
- Full support for Linux - Server, Storage Node and client (Red Hat and Caldera on Intel x86
- Expanded Windows support Windows
NT and 2000
|Q: What are the highlights of this new
- Decreased conversion time when upgrading.
- More efficient index cross-checking (for database integrity).
- A more robust and stable database index structure that stores indexes more efficiently.
- Nondestructive index recovery.
- Significantly smaller client file indexes. The size of a client file index is greatly reduced after conversion, even though the number of files it contains increases by orders of magnitude. After conversion, the media database requires approximately twice as much disk space as it did in NetWorker 5.x releases. This expansion, however, is insignificant when weighed against the size reduction of the client file index.
- Support for recovering the index to a specific time.
- Improved availability of the nsrindexd program. Expect to see a decrease in server busy messages.
- Ability to perform backups after the media database has been converted, and while the client file indexes are being converted.
|Q: What changes have been made in the
Client File Index and to Media Database Disk Format?
|A: The NetWorker server maintains one file index for each client computer and one media database that tracks data from all clients and save sets. Each time a backup is completed, NetWorker creates entries for the backed-up files in the client file index.
The media database stores one entry for
each save set and storage volume during each backup
operation. This release of the NetWorker software requires
that the client file index, server index, and media database
be converted to a new disk format. Because there is no
returning to a previous release of NetWorker once the client
file index, server index, and media database are converted,
be sure to have an up-to-date backup. The first time you run
the new version of NetWorker software, the indexes and media
database are automatically converted. (The NetWorker Release
4.2 and later client files indexes and media database are
automatically converted, but earlier versions must be
recovered from backup.)
|Q: What is the extent of NetWorker’s
|A: A cluster is two or more nodes that
are connected and appear to network users as a single,
highly available system. A highly available system allows
application services to continue despite most hardware or
software failures. It does this by providing failover
(relocation) capability. The NetWorker 6 software now
supports the following additional UNIX cluster environments:
Compaq TruCluster Server 5.0a; HP-UX MC/ServiceGuard 10.05,
10.10, 10.11, and 11.05; Sun Cluster 2.2; Microsoft Cluster
Services; and Legato Cluster (currently available on Solaris
and Windows NT)
|Q: How have NetWorker browse and
retention policies changed?
|A: The NetWorker server uses browse and retention policies to manage the life cycle of data and to control the size of the client file index automatically. The browse policy determines how long files are maintained in the client file index on the NetWorker server. The retention policy determines how long save sets are maintained in the NetWorker server’s media database. Using NetWorker 6, you can specify browse and retention policies for each client, each save set, or for groups of save sets. This is a significant change that allows greater browse and retention flexibility.
In earlier NetWorker
releases, all save sets within a client had to have the same
browse and retention policy (because the policies were bound
to the save sets at the time nsrim ran). With this release
of the NetWorker software, you can have different browse and
retention policies for each save set within a client
(because the policies are bound to each save set when the
data is saved). You can also change the browse and retention
policies of save sets at any time, without affecting the
policies of other save sets in the client.
|Q: What is NDMP and the extent of the
new NDMP support for NetApp, EMC and Auspex?
|A: Network Data Management Protocol (NDMP) is a standards-based, storage management client/server protocol for enterprise-wide backup of heterogeneous, network-attached storage. It allows the NetWorker 6.x and later software versions to provide connections to computers with NDMP data modules for tape operations, allowing a significant reduction in network traffic and better use of the time window dedicated to backups. NDMP also allows NetWorker to maintain the client index and media database, as well as control backup operations on a UNIX or Windows NT™ computer with an NDMP service installed. The NetWorker NDMP module is available on the Solaris and HP-UX operating systems and supports the following:
|Q: Are there special memory
requirements when using a NetWorker NDMP server?
|A: In this release, backing up large
numbers of files using a NetWorker NDMP server can require a
large amount of memory and/or swap space. If your system
does not have enough swap space to hold the entire file
history, you may receive the following error message: cannot
decode the file. If this happens, try increasing the swap
space. If, after increasing the swap space, the backup is
still running slowly, try increasing the amount of memory on
|Q: What is the significance of the new
NetWorker 64 bit data format?
|A: NetWorker 6 uses an upgraded, 64-bit
data format. The new format was introduced to support
several of the features that are new in this release. These
include indexing and media database improvements; support
for NetWorker NDMP with Celestra, Network Appliance,
and EMC; and support for save sets that are larger than 2
|Q: How have Save Set ID’S changed in
this new release of NetWorker?
|A: Each NetWorker client now has a
unique ID that is used to identify it in the media database,
and for index backups to identify a save set with the
client. The client ID that is automatically generated by the
NetWorker server is unique across servers, and is maintained
in the media database.
|Q: How has support for large save sets
and large save set names changed?
|A: This release of the NetWorker
software supports save sets that are larger than 2GB.This
eliminates the need to divide large save sets into a series
of smaller, continued save sets from NetWorker 6.0 clients
backing up to NetWorker 6.0 servers. The maximum length
limit on save set names has also been increased from 64
bytes to 255 bytes.
|Q: What is directed
cross-platform recovery and how can it be used in my
|A: Directed cross-platform recovery allows you to recover backed-up data remotely from a NetWorker client (the source client) and direct it to another NetWorker client (the destination client) within an enterprise. The destination client receiving the recovered data can be the source client itself, another NetWorker client within the enterprise, or the administering client computer. Directed recovery includes all the NetWorker standard file handling features. Directed recovery is useful in recovering data from a shared server or another computer where users cannot recover the data themselves. Directed recovery allows you to perform the recovery remotely, from your own computer, rather than from the source computer.
Directed recovery also permits recovered data to be directed to NetWorker client computers other than the requesting one. This allows the sharing of files and information among a broad range of NetWorker client computers.
You can use the NetWorker software to administer directed recoveries between UNIX-based and Windows-based NetWorker clients by entering NetWorker commands at the command line. Refer to the recover(1m) man page for information about these commands. The nwrecover program does not support directed recovery.
You can perform directed recoveries of data between different combinations of Windows-based and UNIX-based source and destination clients. You must, however, have established the proper remote access requirements for the clients and the NetWorker server that backs up their data. The source and destination clients must also be of the same type (either both Windows-based, or both UNIX-based).
In this NetWorker
release, the save stream format is different from the format
in previous releases. Therefore, you cannot use an earlier
NetWorker release to recover data that was backed up using
the current NetWorker release.
New Features in NetWorker 6.2
The NetWorker 6.2 release builds upon the NetWorker 6 platform to meet the growing information protection needs of Windows-based Data Centers and Branch Offices. Designed for the Windows platform with the full functionality of NetWorker 6.1x, NetWorker 6.2 delivers automated backup and recovery of NDMP-based Network Attached Storage (NAS) using a Windows backup server, client support for Windows XP Professional Edition and improved RAP architecture.
Extends NDMP-NAS Protection - NetWorker 6.2 extends NetWorker's comprehensive protection for NDMP-NAS systems to the Windows platform (2000/NT). Co-developed by LEGATO Systems and Network Appliance, the Network Data Management Protocol (NDMP) is a widely accepted standard for efficiently managing backup and recovery of NAS devices.
With NetWorker 6.2, departmental and data center environments now have the option of using Unix, Linux or Windows backup servers to centralize and automate protection of NDMP-NAS systems from Network Appliance, EMC, Auspex and other leading vendors. Used in conjunction with NetWorker NDMP Client Connections, NetWorker 6.2 offers the same flexible configuration options available in UNIX and Linux environments to maximize backup and recovery performance, consolidate tape resources, and reduce management overhead including:
Local backup to individually
attached tape drives/libraries
Remote backup to NDMP-NAS
Remote backup to libraries attached to Unix-servers installed with NetWorker SnapImage
Backup to libraries attached to Fibre-Channel SANs
Backup to a network attached ATL library via NDMP
To further reduce backup and recovery completion times, minimize downtime costs and optimize storage investments in NDMP-NAS environments, NetWorker 6.2 also extends support for:
Dynamic Drive Sharing (DDS) - enables tape drives to be shared automatically between NAS systems and Storage Nodes over a Fibre-Channel SAN
Direct Access Restore (DAR) - pinpoints file locations to eliminate time consuming tape scanning during file level restores
Windows XP Professional Edition Client Protection - NetWorker 6.2 delivers centralized, automated protection of Windows XP Professional Edition data. Full, incremental and differential backups of systems states and all components are fully supported, enabling businesses to upgrade to Windows XP Professional Edition with the confidence their storage assets are reliably protected.
RAP Improvement - To increase backup and recovery performance and serve the scalability requirements of growing Windows environments, NetWorker 6.2 introduces a new Resource Administration Platform (RAP) database architecture for storing client resource information. The \nsr\res\nsr.res and \nsr\res\nsrjb.res entries are saved as individual files instead of within a single, expanding file. This advancement also enables multiple database reads and eliminates access delays during modification of resource information. NetWorker 6.2's RAP architecture ensures database queries are fast, regardless of how large the database grows as client resources are added.
|New Features in NetWorker 6.2
|Windows 2000 / Windows NT 4.0 backup
server for NDMP-based protection of Network Appliance, EMC
IP4700, Auspex NS3000/2000 NAS systems
|Windows XP Professional Edition NetWorker Client support