Parameters¶

This section list all the parameters that can be passed to rabit::Init function as argv. All the parameters are passed in as string in format of parameter-name=parameter-value. In most setting these parameters have default value or will be automatically detected, and do not need to be manually configured.

• rabit_tracker_uri [passed in automatically by tracker]
• The uri/ip of rabit tracker
• rabit_tracker_port [passed in automatically by tracker]
• The port of rabit tracker
• rabit_task_id [automatically detected]
• The unique identifier of computing process
• When running on hadoop, this is automatically extracted from enviroment variable
• rabit_reduce_buffer [default = 256MB]
• The memory buffer used to store intermediate result of reduction
• Format “digits + unit”, can be 128M, 1G
• rabit_global_replica [default = 5]
• Number of replication copies of result kept for each Allreduce/Broadcast call
• rabit_local_replica [default = 2]
• Number of replication of local model in check point