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OceanBase Database Proxy

V4.3.1

What is ODP?
Installation and deployment
- Overview
- Deploy ODP by using obd
- Deploy ODP by using OCP
- Deploy ODP by using the CLI
- Deployment modes
Basic operations
Configuration parameter
- View and modify parameters
- Parameter summary
- Global parameters
  - automatic_match_work_thread
  - block_thread_num
  - cache_cleaner_clean_interval
  - check_tenant_locality_change
  - client_max_connections
  - client_max_memory_size
  - client_session_id_version
  - client_sock_option_flag_out
  - client_tcp_keepcnt
  - client_tcp_keepidle
  - client_tcp_keepintvl
  - client_tcp_user_timeout
  - cluster_count_high_water_mark
  - cluster_expire_time
  - config_server_refresh_interval
  - congestion_fail_window
  - congestion_failure_threshold
  - congestion_retry_interval
  - connection_diagnosis_option
  - connect_observer_max_retries
  - current_local_config_version
  - default_buffer_water_mark
  - default_inactivity_timeout
  - delay_exit_time
  - delay_update_entry_interval
  - detect_server_timeout
  - digest_sql_length
  - enable_abort_conn_info
  - enable_async_log
  - enable_async_pull_location_cache
  - enable_bad_route_reject
  - enable_binlog_service
  - enable_cached_server
  - enable_causal_order_read
  - enable_client_connection_lru_disconnect
  - enable_client_ip_checkout
  - enable_cluster_checkout
  - enable_compression_protocol
  - enable_congestion
  - enable_connection_diagnosis
  - enable_cpu_isolate
  - enable_cpu_topology
  - enable_extra_prometheus_metric
  - enable_flow_control
  - enable_full_link_trace
  - enable_full_username
  - enable_get_rslist_remote
  - enable_global_ps_cache
  - enable_index_route
  - enable_monitor_stat
  - enable_ob_protocol_v2
  - enable_ob_protocol_v2_with_client
  - enable_obproxy_rpc_service
  - enable_partition_table_route
  - enable_performance_mode
  - enable_pl_route
  - enable_primary_zone
  - enable_prometheus
  - enable_proxy_scramble
  - enable_qa_mode
  - enable_qos
  - enable_report_session_stats
  - enable_reroute
  - enable_sequence_prefetch
  - enable_sharding
  - enable_single_leader_node_routing
  - enable_standby
  - enable_stat
  - enable_strict_kernel_release
  - enable_strict_stat_time
  - enable_sync_all_stats
  - enable_syslog_file_compress
  - enable_syslog_wf
  - enable_trace
  - enable_trace_stats
  - enable_trans_detail_stats
  - enable_transaction_internal_routing
  - enable_xa_route
  - fetch_proxy_bin_random_time
  - fetch_proxy_bin_timeout
  - flow_consumer_reenable_threshold
  - flow_event_queue_threshold
  - flow_high_water_mark
  - flow_low_water_mark
  - grpc_client_num
  - grpc_thread_num
  - hot_upgrade_exit_timeout
  - hot_upgrade_failure_retries
  - hot_upgrade_rollback_timeout
  - idc_list_refresh_interval
  - ignore_local_config
  - internal_cmd_mem_limited
  - ip_listen_mode
  - ldg_info_refresh_interval
  - listen_port
  - local_bound_ip
  - local_bound_ipv6_ip
  - log_cleanup_interval
  - log_dir_size_threshold
  - log_file_percentage
  - long_async_task_timeout
  - max_log_file_size
  - max_syslog_file_count
  - max_syslog_file_time
  - mem_leak_check_class_name
  - mem_leak_check_mod_name
  - metadb_server_state_refresh_interval
  - min_congested_connect_timeout
  - min_keep_congestion_interval
  - monitor_cost_ms_unit
  - monitor_item_limit
  - monitor_item_max_idle_period
  - monitor_log_level
  - monitor_stat_dump_interval
  - monitor_stat_high_threshold
  - monitor_stat_low_threshold
  - monitor_stat_middle_threshold
  - need_convert_vip_to_tname
  - net_accept_threads
  - net_config_poll_timeout
  - normal_pl_update_threshold
  - obproxy_config_server_url
  - obproxy_sys_password
  - partition_location_expire_relative_time
  - prometheus_cost_ms_unit
  - prometheus_listen_port
  - prometheus_sync_interval
  - protocol_diagnosis_level
  - proxy_hot_upgrade_check_interval
  - proxy_id
  - proxy_info_check_interval
  - proxy_local_cmd
  - proxy_mem_limited
  - qa_mode_mock_public_cloud_slb_addr
  - qos_stat_clean_interval
  - qos_stat_item_limit
  - refresh_idc_list
  - refresh_json_config
  - refresh_rslist
  - request_buffer_length
  - rootservice_list
  - routing_cache_mem_limited
  - rpc_enable_direct_expire_route_entry
  - rpc_enable_congestion
  - rpc_enable_global_index
  - rpc_enable_force_srv_black_list
  - rpc_enable_reroute
  - rpc_enable_parallel_handler
  - rpc_enable_retry_request_info_log
  - rpc_force_srv_black_list
  - rpc_max_request_batch_size
  - rpc_listen_port
  - rpc_max_response_batch_size
  - rpc_net_timeout_base
  - rpc_max_server_table_entry_num
  - rpc_request_timeout
  - rpc_period_task_interval
  - rpc_server_entry_expire_time
  - rpc_request_timeout_delta
  - rpc_server_net_invalid_time_us
  - rpc_server_net_handler_expire_time
  - rpc_server_net_max_pending_request
  - rpc_srv_session_pool_inactive_timeout
  - rpc_support_key_partition_shard_request
  - sequence_entry_expire_time
  - sequence_fail_retry_count
  - sequence_prefetch_threshold
  - server_detect_fail_threshold
  - server_detect_mode
  - server_detect_refresh_interval
  - server_routing_mode
  - server_state_refresh_interval
  - server_tcp_init_cwnd
  - server_tcp_keepcnt
  - server_tcp_keepidle
  - server_tcp_keepintvl
  - server_tcp_user_timeout
  - shard_scan_thread_num
  - short_async_task_timeout
  - skip_proxy_sys_private_check
  - skip_proxyro_check
  - slow_proxy_process_time_threshold
  - slow_transaction_time_threshold
  - sock_option_flag_out
  - sock_packet_mark_out
  - sock_packet_tos_out
  - sock_recv_buffer_size_out
  - sock_send_buffer_size_out
  - sql_table_cache_expire_relative_time
  - sql_table_cache_mem_limited
  - sqlaudit_mem_limited
  - stack_size
  - stat_dump_interval
  - stat_table_sync_interval
  - syslog_io_bandwidth_limit
  - syslog_level
  - task_thread_num
  - tenant_location_valid_time
  - tunnel_request_size_threshold
  - username_separator
  - work_thread_num
  - xflush_log_level
- Multi-level parameters
  - binlog_service_ip
  - compression_algorithm
  - enable_client_ssl
  - enable_cloud_full_username
  - enable_read_write_split
  - enable_server_ssl
  - enable_transaction_split
  - enable_weak_reroute
  - mysql_version
  - ob_max_read_stale_time
  - obproxy_force_parallel_query_dop
  - obproxy_read_consistency
  - obproxy_read_only
  - observer_query_timeout_delta
  - observer_sys_password
  - observer_sys_password1
  - proxy_idc_name
  - proxy_primary_zone_name
  - proxy_route_policy
  - proxy_tenant_name
  - query_digest_time_threshold
  - read_stale_retry_interval
  - rootservice_cluster_name
  - route_diagnosis_level
  - slow_query_time_threshold
  - ssl_attributes
  - target_db_server
Connection management
- Principles
- Session status synchronization
- Configure a globally unique client session ID
- Client session
- Server session
- Network connection
Data routing
- Factors affecting data routing
- ODP routing
- Intra-tenant routing
  - Overview
  - IP address-based routing
  - Partitioned table-based routing for strong-consistency reads
  - Global index table-based routing for strong-consistency reads
  - Replicated table-based routing for strong-consistency reads
  - Primary zone-based routing for strong-consistency reads
  - Strategy-based routing
  - Distributed transaction routing
  - Rerouting
  - Forcible routing
- Automatic routing to the primary/standby tenants
- Read/Write separation
- Follower latency threshold
- Function partition key routing
  - Overview
  - String functions
  - Numeric calculation functions
  - Date calculation functions
  - FAQ
- Character set-based routing
Logs
- Overview
- obproxy_diagnosis.log
- obproxy_digest.log
- obproxy_error.log
- obproxy_slow.log
- obproxy_stat.log
- obproxy.log
Commands
- Overview
- Dedicated ODP commands
  - ALTER
  - KILL
  - ping
  - SHOW
- Compatible MySQL commands
  - BINLOG
  - KILL
  - SHOW PROCESSLIST
  - SHOW RELAYLOG EVENTS
  - SHOW SLAVE HOSTS
High availability mechanism
- Overview
- High availability of ODP services
- High availability of OceanBase Database
- High availability testing
Security and protocols
RPC service port
Operation and maintenance
- Troubleshooting logic
- Performance analysis
- Show Trace
- Routing diagnostics
  - Overview
  - Obtain diagnostic information
  - Diagnostic point troubleshooting
    - Overview
    - SQL_PARSE
    - ROUTE_INFO
    - LOCATION_CACHE_LOOKUP
    - ROUTINE_ENTRY_LOOKUP_DONE
    - FETCH_TABLE_RELATED_DATA
    - TABLE_ENTRY_LOOKUP_DONE
    - EXPR_PARSE
    - CALC_ROWID
    - RESOLVE_TOKEN
    - RESOLVE_EXPR
    - CALC_PARTITION_ID
    - PARTITION_ID_CALC_DONE
    - PARTITION_ENTRY_LOOKUP_DONE
    - ROUTE_POLICY
    - CONGESTION_CONTROL
    - RETRY
    - HANDLE_RESPONSE
  - Examples
- Memory leak diagnostics
- Connection diagnostics
Release Notes
- Versioning rules
- Enterprise Edition
  - V4.3
    - ODP Enterprise Edition V4.3.1
    - ODP Enterprise Edition V4.3.0
  - V4.2
    - ODP Enterprise Edition V4.2.3
    - ODP Enterprise Edition V4.2.2
    - ODP Enterprise Edition V4.2.1
  - V4.1
    - ODP Enterprise Edition V4.1.0
  - V4.0
    - ODP Enterprise Edition V4.0.0
  - V3.2
    - ODP Enterprise Edition V3.2.11
    - ODP Enterprise Edition V3.2.3.5
- Community Edition
  - V4.3
    - ODP Community Edition V4.3.1
  - V4.2
    - ODP Community Edition V4.2.3
    - ODP Community Edition V4.2.1
    - ODP Community Edition V4.2.0
  - V4.1
    - ODP Community Edition V4.1.0
  - V4.0
    - ODP Community Edition V4.0.0

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proxy_route_policy

Last Updated：2026-04-14 09:41:35 Updated

proxy_route_policy specifies the routing strategy for weak-consistency read requests in OceanBase Database Proxy (ODP), which defines the backend server to which client requests are routed for processing.

Attribute	Description
Parameter type	String
Default value	'', which indicates an empty string
Value range	Empty string: The default routing strategy (`MERGE_IDC_ORDER`) of ODP is used. In this strategy, weak-consistency read requests can be routed to followers and read-only replicas. `FOLLOWER_FIRST`: Read requests are preferentially routed to followers. If all the followers are unavailable, the requests are routed to the leader. `FOLLOWER_ONLY`: Read requests are routed only to followers. If all the followers are unavailable, the connection to the client is terminated. `UNMERGE_FOLLOWER_FIRST`: Read requests are preferentially routed to a follower of which the cluster is not in a major compaction.
Effective upon ODP restart	No

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