Fri, 23 Feb 2024 22:05:51 -0000
|Read Time: 0 minutes
Dell NetWorker is an enterprise-class cross-platform data protection software solution for file servers, application servers, and database management systems across the network. NetWorker supports a wide range of data protection options, including Network Data Management Protocol (NDMP) support for NAS storage devices. Dell PowerScale NAS storage integration with NetWorker software provides esteemed data protection and recovery capabilities for enterprises of all sizes in a secure way.
NetWorker software uses NDMP functionality to enable access to storage in a heterogeneous network environment. NDMP uses TCP/IP to control the movement of the data and specifies various device drivers to store the data on devices.
Three main components support NDMP data operations with the NetWorker software: NDMP Data Server (PowerScale), NDMP Tape Server (the host with the backup device to which NetWorker writes the NDMP data), and the Data Management Agent or DMA (in which the NetWorker server is the DMA).
NetWorker 9.0.1 and later supports multistreaming for up to 32 streams for Isilon OneFS 8.0 and later backups. NetWorker uses the client parallelism value that is defined for a PowerScale client to determine how many backups run concurrently.
NetWorker storage nodes support IPv6 communications with a NetWorker server. By default, NDMP backup and recovery operations use IPv6 to create the data connection between the NDMP data server and mover server.
The PowerScale filers create a snapshot of the file system before the backup. The save set is generated from the snapshot.
Data Access in Real Time (DART) version 5.5 and later.
DAR and DDAR send file information from the NAS filer to the NetWorker server.
In an NDMP local backup (Direct-NDMP), the NDMP Data Server (NAS) sends data to a locally attached tape device or library.
NetWorker software writes NDMP data to non-NDMP devices, including tape, virtual tape, AFTD, and Dell PowerProtect DD series appliances. A backup of NDMP data to a non-NDMP device is performed in one of two ways:
NDMP data sent to non-NDMP devices that are local to the NetWorker servers has the following characteristics:
NDMP backups can be configured to write data to a NetWorker storage node in one of two ways:
Immediate save (nsrdsa_save runs on storage node)
The nsrdsa_save backup command runs on the NetWorker storage node. The NetWorker software uses TCP/IP and shared memory to communicate between the nsrdsa_save and nsrmmd processes.
Non-immediate save (nsrdsa_save runs on NetWorker Server)
By default, NDMP backups to a non-NDMP device use non-immediate save. When configuring an NDMP backup to use non-immediate save, the following actions occur:
A three-party or three-way backup sends NDMP data to an NDMP Tape Server, however the NDMP Data Server and the NDMP Tape Server are not the same physical host.
There are two main types of three-party backups:
Dynamic Drive Sharing (DDS) is a feature that provides NetWorker software with the ability to recognize shared physical tape drives.
DDS enables NetWorker software to perform the following operations:
Enabling DDS on a NetWorker system provides these benefits:
Author: Vinod Kumaresan