Dell DR Series System Administrator Guide

Understanding the OST CLI Commands

The --mode component supported in the DR Series system command line interface (CLI) command supports three values, which represent optimized writes done via:

deduplication ( --mode dedupe) The client will process hashing on data, so deduplication processing occurs on the server side (client-side deduplication).
passthrough ( --mode passthrough) The client will pass all data to DR for deduplication processing (appliance-side deduplication).
auto ( --mode auto)
DR will set the deduplication to Dedupe or Passthrough, based on the client’s number of cores and whether it is 32– or 64–bit.

These OST commands are used in the following format: ost --update_client --name --mode.

NOTE: If a RDA with OST client has four or more CPU cores, it is considered to be dedupe-capable. However, the client operating mode depends upon how it is configured in the DR Series system ( Dedupe is the default RDA with OST client mode). If the administrator did not configure a client to operate in a specific mode and it is dedupe-capable, it will run in the Dedupe mode. If a client is not dedupe-capable (meaning the client has less than four CPU cores), and the administrator sets it to run in the Dedupe mode, it will only run in the Passthrough mode. If a client is set to run in Auto mode, the client will run in the mode setting determined by the media server. The following table shows the relationship between the configured client mode types and the supported client mode based on client architecture type and corresponding number of CPU cores.

Table 1. Supported RDA with OST Client Modes and Settings
Client Mode Settings	32–Bit Client (4 or more CPU cores)	64–Bit Client (4 or more CPU cores)	32–Bit Client (Less than 4 CPU cores)	64–Bit Client (Less than 4 CPU cores)
Auto	Passthrough	Dedupe	Passthrough	Passthrough
Dedupe	Not Supported	Supported	Not Supported	Not Supported
Passthrough	Supported	Supported	Supported	Supported

Supported DR Series System CLI Commands for RDA with OST

The following are the supported DR Series system CLI commands for RDA with OST operations:

administrator@acme100 > ost
                                 Usage:
                                 ost --show [--config]
                                 [--file_history] [--name <name>]
                                 [--clients]
                                 [--limits]
                                 
                                 ost --setpassword
                                 ost --delete_client --name <OST Client Hostname>
                                 
                                 ost --update_client --name <OST Client Hostname>
                                 --mode <auto|passthrough|dedupe>
                                 
                                 ost --limit --speed <<num><kbps|mbps|gbps> | default>
                                 --target <ip address | hostname>
                                 
                                 ost --help
                                 
                                 ost <command> <command-arguments>
                                 <command> can be one of:
                                 --show            Displays command specific information.
                                 --setpassword     Updates the OST user password.
                                 --delete_client   Deletes the OST client.
                                 --update_client   Updates attributes of the OST client.
                                 --limit           Limits bandwidth consumed by ost.
                                 
                                 For command-specific help, please type ost --help <command>
                                 For example:
                                 ost --help show

NOTE: The --files in the ost --show --file_history command represents replicated files that were processed via the DMA optimized duplication operation. This command displays only up to the last 10 such files. The --name in the ost --show --name command represents the OST container name.

NOTE: For more information about OST-related DR Series system CLI commands, see the Dell DR Series System Command Line Reference Guide .

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Dell DR Series System Administrator Guide

Understanding the OST CLI Commands

Supported DR Series System CLI Commands for RDA with OST

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