Reference Guide

ost --update_client --name <OST Client Hostname> --mode <auto | passthrough | dedupe>
Description
Updates the attributes of an OST client (OST client name and mode). The OST client modes are auto, passthrough, and
dedupe. If an OST client has four or more CPU cores, it is considered to be dedupe-capable. However, the OST client
operating mode depends upon how it is configured in the DR Series system.
• Auto — Sets the mode to dedupe or passthrough as determined by the media server. The mode used is based on
how many cores the OST client has and whether it is 32–bit or 64–bit. If the OST client has four or more CPU cores, it
will run in the dedupe mode. If the OST client has less than four CPU cores, it will run in passthrough mode. For
details, see the table below.
• Passthrough — The OST client passes all data to the DR Series system for dedupe processing. This is also known as
“appliance-side dedupe”.
• Dedupe — The OST client processes hashing on the data. This is also known as “source-side dedupe” and is the
default mode. Keep in mind that the OST client must be dedupe-capable (four or more CPU cores) in order for this
mode to be in effect. If the OST client is not dedupe-capable, it will run in passthrough mode regardless of its dedupe
mode setting.
The following table shows the relationship between the configured OST client mode types and the supported client
mode based on client architecture type and corresponding number of CPU cores.
Table 2. Supported OST Client Modes and Settings
OST Client Mode
Settings
32–Bit OST Client (4 or
more CPU Cores)
64–Bit Client (4 or
more CPU Cores)
32–Bit OST Client
(Less than 4 CPU
Cores)
64–Bit OST Client
(Less than 4 CPU
Cores)
Auto Passthrough Dedupe Passthrough Passthrough
Dedupe Not Supported Supported Not Supported Not Supported
Passthrough Supported Supported Supported Supported
Syntax
ost --update_client --name acme-81 --mode dedupe
NOTE: You may be able to force writes for OST clients running in the Passthrough mode using the DR Series
system CLI mode --dedupe command. The change in OST client mode is effective on the next backup operation
when you are using Symantec NetBackup. (If you are using Symantec Backup Exec, you will need to restart this
service for it to recognize that a new mode has been configured.)
Result
OST client updated successfully.
ost --limit --speed <<num><kbps | mbps | gbps | default> --target <ip address | hostname>
Description
Limits the bandwidth consumed by OST (OpenStorage Technology) for a system you define by IP address or hostname
(--target), by which you define the speed in kilobytes/second (KBps), megabytes/second (MBps), gigabytes/second
(GBps), or an unlimited bandwidth (default).
Syntax
ost --limit --speed 10mbps --target acmesys-49
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