IBM E16RMLL-I - Tivoli Storage Manager, Руководство по внедрению

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IBM Tivoli Storage Manager Implementation Guide
When planning for LAN-free data movement, remember that the file metadata
must still be sent over the LAN. This metadata can add overhead to a LAN-free
backup. Even though the data is streaming over the SAN to the tape or disk, the
metadata still goes to the Tivoli Storage Manager server using whatever LAN
protocol and speed are being used. As you might imagine, as the amount of
metadata grows, the LAN-free backup speed will approach the speed of
LAN-based backup.
Experience has shown that systems with large files (greater than 10 MB, on
average) and large amounts of data (greater than 50 GB) are good candidates
for LAN-free backup, while systems with numerous small files (average size in
KB) often perform better using traditional LAN-based backups. Examples of the
former include databases, mail systems, and ERP systems; examples of the
latter are traditional file and print type servers.
Figure 2-2 LAN-free data movement
2.7.2 Communication protocol
Most network protocols such as TCP/IP and NETBIOS are supported by Tivoli
Storage Manager. TCP/IP is the most common communication method and the
easiest to set up. Certain functions, such as server prompted mode and the Web
clients, require TCP/IP.
Client
Backup
Server
Data
LAN/WAN (TCP/IP)
Tape
FC Device
SAN
Data Flow
Control Flow