Docs Cloud Redpanda Connect Components Catalog Outputs arc arc Page options Copy as Markdown Copied! View as plain text Ask AI about this topic Add MCP server to VS Code Available in: Cloud, Self-Managed Writes data to an Arc database via the msgpack ingestion endpoint. This output sends data to an Arc columnar analytical database using its high-performance MessagePack ingestion endpoint. Arc supports two payload formats: columnar (default): Transposes batched messages into column arrays. This is the recommended format, offering significantly faster ingestion. row: Sends each message as an individual row record with fields and optional tags. Data is encoded as MessagePack and optionally compressed with zstd (recommended) or gzip before being sent to the Arc endpoint. In columnar mode, all messages within a single batch must have the same set of fields. Arc validates that all column arrays have equal length and rejects batches with mismatched columns. Schema evolution across separate batches is fully supported. Use row format if messages within a batch have varying schemas. Common Advanced outputs: label: "" arc: base_url: "" # No default (required) timeout: 5s token: "" # No default (optional) database: default measurement: "" # No default (required) format: columnar tags_mapping: "" # No default (optional) compression: zstd max_in_flight: 64 batching: count: 0 byte_size: 0 period: "" check: "" processors: [] # No default (optional) outputs: label: "" arc: base_url: "" # No default (required) timeout: 5s tls: enabled: false skip_cert_verify: false enable_renegotiation: false root_cas: "" root_cas_file: "" client_certs: [] proxy_url: "" disable_http2: false tps_limit: 0 tps_burst: 1 backoff: initial_interval: 1s max_interval: 30s max_retries: 3 tcp: connect_timeout: 0s keep_alive: idle: 15s interval: 15s count: 9 tcp_user_timeout: 0s http: max_idle_conns: 100 max_idle_conns_per_host: 0 max_conns_per_host: 64 idle_conn_timeout: 1m30s tls_handshake_timeout: 10s expect_continue_timeout: 1s response_header_timeout: 0s disable_keep_alives: false disable_compression: false max_response_header_bytes: 1048576 max_response_body_bytes: 10485760 write_buffer_size: 4096 read_buffer_size: 4096 h2: strict_max_concurrent_requests: false max_decoder_header_table_size: 4096 max_encoder_header_table_size: 4096 max_read_frame_size: 16384 max_receive_buffer_per_connection: 1048576 max_receive_buffer_per_stream: 1048576 send_ping_timeout: 0s ping_timeout: 15s write_byte_timeout: 0s access_log_level: "" access_log_body_limit: 0 token: "" # No default (optional) database: default measurement: "" # No default (required) format: columnar timestamp_field: "" timestamp_unit: auto tags_mapping: "" # No default (optional) compression: zstd max_in_flight: 64 batching: count: 0 byte_size: 0 period: "" check: "" processors: [] # No default (optional) Fields access_log_body_limit Maximum bytes of request/response body to include in logs. 0 to skip body logging. Type: int Default: 0 access_log_level Log level for HTTP request/response logging. Empty disables logging. Type: string Default: "" Options: `, `TRACE, DEBUG, INFO, WARN, ERROR backoff Adaptive backoff configuration for 429 (Too Many Requests) responses. Always active. Type: object backoff.initial_interval Initial interval between retries on 429 responses. Type: string Default: 1s backoff.max_interval Maximum interval between retries on 429 responses. Type: string Default: 30s backoff.max_retries Maximum number of retries on 429 responses. Type: int Default: 3 base_url Base URL of the target service (e.g., https://api.example.com). TLS is enabled automatically for https URLs. Type: string batching Allows you to configure a batching policy. Type: object # Examples: batching: byte_size: 5000 count: 0 period: 1s # --- batching: count: 10 period: 1s # --- batching: check: this.contains("END BATCH") count: 0 period: 1m batching.byte_size An amount of bytes at which the batch should be flushed. If 0 disables size based batching. Type: int Default: 0 batching.check A Bloblang query that should return a boolean value indicating whether a message should end a batch. Type: string Default: "" # Examples: check: this.type == "end_of_transaction" batching.count A number of messages at which the batch should be flushed. If 0 disables count based batching. Type: int Default: 0 batching.period A period in which an incomplete batch should be flushed regardless of its size. Type: string Default: "" # Examples: period: 1s # --- period: 1m # --- period: 500ms batching.processors[] A list of processors to apply to a batch as it is flushed. This allows you to aggregate and archive the batch however you see fit. Please note that all resulting messages are flushed as a single batch, therefore splitting the batch into smaller batches using these processors is a no-op. Type: processor # Examples: processors: - archive: format: concatenate # --- processors: - archive: format: lines # --- processors: - archive: format: json_array compression Compression algorithm for the request body. zstd is recommended for best decompression performance in Arc. Type: string Default: zstd Options: zstd, gzip, none database The target database name. Type: string Default: default disable_http2 Disable HTTP/2 and force HTTP/1.1. Type: bool Default: false format The payload format. columnar transposes batch messages into column arrays for best performance. row sends each message as an individual record. Type: string Default: columnar Options: columnar, row http HTTP transport settings controlling connection pooling, timeouts, and HTTP/2. Type: object http.disable_compression Disable automatic decompression of gzip responses. Type: bool Default: false http.disable_keep_alives Disable HTTP keep-alive connections; each request uses a new connection. Type: bool Default: false http.expect_continue_timeout Maximum time to wait for a server’s 100-continue response before sending the body. 0 means the body is sent immediately. Type: string Default: 1s http.h2 HTTP/2-specific transport settings. Only applied when HTTP/2 is enabled. Type: object http.h2.max_decoder_header_table_size Upper limit in bytes for the HPACK header table used to decode headers from the peer. Must be less than 4 MiB. Type: int Default: 4096 http.h2.max_encoder_header_table_size Upper limit in bytes for the HPACK header table used to encode headers sent to the peer. Must be less than 4 MiB. Type: int Default: 4096 http.h2.max_read_frame_size Largest HTTP/2 frame this endpoint will read. Valid range: 16 KiB to 16 MiB. Type: int Default: 16384 http.h2.max_receive_buffer_per_connection Maximum flow-control window size in bytes for data received on a connection. Must be at least 64 KiB and less than 4 MiB. Type: int Default: 1048576 http.h2.max_receive_buffer_per_stream Maximum flow-control window size in bytes for data received on a single stream. Must be less than 4 MiB. Type: int Default: 1048576 http.h2.ping_timeout Timeout waiting for a PING response before closing the connection. Type: string Default: 15s http.h2.send_ping_timeout Idle timeout after which a PING frame is sent to verify connection health. 0 disables health checks. Type: string Default: 0s http.h2.strict_max_concurrent_requests When true, new requests block when a connection’s concurrency limit is reached instead of opening a new connection. Type: bool Default: false http.h2.write_byte_timeout Timeout for writing data to a connection. The timer resets whenever bytes are written. 0 disables the timeout. Type: string Default: 0s http.idle_conn_timeout How long an idle connection remains in the pool before being closed. 0 disables the timeout. Type: string Default: 1m30s http.max_conns_per_host Maximum total connections (active + idle) per host. 0 means unlimited. Type: int Default: 64 http.max_idle_conns Maximum total number of idle (keep-alive) connections across all hosts. 0 means unlimited. Type: int Default: 100 http.max_idle_conns_per_host Maximum idle connections to keep per host. 0 (the default) uses GOMAXPROCS+1. Type: int Default: 0 http.max_response_body_bytes Maximum bytes of response body the client will read. The response body is wrapped with a limit reader; reads beyond this cap return EOF. 0 disables the limit. Type: int Default: 10485760 http.max_response_header_bytes Maximum bytes of response headers to allow. Type: int Default: 1048576 http.read_buffer_size Size in bytes of the per-connection read buffer. Type: int Default: 4096 http.response_header_timeout Maximum time to wait for response headers after writing the full request. 0 disables the timeout. Type: string Default: 0s http.tls_handshake_timeout Maximum time to wait for a TLS handshake to complete. 0 disables the timeout. Type: string Default: 10s http.write_buffer_size Size in bytes of the per-connection write buffer. Type: int Default: 4096 max_in_flight The maximum number of messages to have in flight at a given time. Increase this to improve throughput. Type: int Default: 64 measurement The measurement (table) name. Supports interpolation functions. Type: string # Examples: measurement: cpu_metrics # --- measurement: ${!metadata("measurement")} # --- measurement: ${!json("type")} proxy_url HTTP proxy URL. Empty string disables proxying. Type: string Default: "" tags_mapping An optional Bloblang mapping to extract tags from each message. Only used in row format. The result must be a map[string]string. Type: string # Examples: tags_mapping: root = {"host": this.hostname, "region": this.region} tcp TCP socket configuration. Type: object tcp.connect_timeout Maximum amount of time a dial will wait for a connect to complete. Zero disables. Type: string Default: 0s tcp.keep_alive TCP keep-alive probe configuration. Type: object tcp.keep_alive.count Maximum unanswered keep-alive probes before dropping the connection. Zero defaults to 9. Type: int Default: 9 tcp.keep_alive.idle Duration the connection must be idle before sending the first keep-alive probe. Zero defaults to 15s. Negative values disable keep-alive probes. Type: string Default: 15s tcp.keep_alive.interval Duration between keep-alive probes. Zero defaults to 15s. Type: string Default: 15s tcp.tcp_user_timeout Maximum time to wait for acknowledgment of transmitted data before killing the connection. Linux-only (kernel 2.6.37+), ignored on other platforms. When enabled, keep_alive.idle must be greater than this value per RFC 5482. Zero disables. Type: string Default: 0s timeout HTTP request timeout. Type: string Default: 5s timestamp_field The field name within each message containing the timestamp. If empty, the current time is used. Supports Unix timestamps and RFC3339 strings. Type: string Default: "" timestamp_unit The unit of a numeric timestamp field. auto detects the unit based on magnitude. Ignored when timestamp_field is empty. Type: string Default: auto Options: us, ms, s, ns, auto tls Custom TLS settings can be used to override system defaults. Type: object tls.client_certs[] A list of client certificates to use. For each certificate either the fields cert and key, or cert_file and key_file should be specified, but not both. Type: object Default: [] # Examples: client_certs: - cert: foo key: bar # --- client_certs: - cert_file: ./example.pem key_file: ./example.key tls.client_certs[].cert A plain text certificate to use. Type: string Default: "" tls.client_certs[].cert_file The path of a certificate to use. Type: string Default: "" tls.client_certs[].key A plain text certificate key to use. This field contains sensitive information that usually shouldn’t be added to a configuration directly. For more information, see Manage Secrets before adding it to your configuration. Type: string Default: "" tls.client_certs[].key_file The path of a certificate key to use. Type: string Default: "" tls.client_certs[].password A plain text password for when the private key is password encrypted in PKCS#1 or PKCS#8 format. The obsolete pbeWithMD5AndDES-CBC algorithm is not supported for the PKCS#8 format. Because the obsolete pbeWithMD5AndDES-CBC algorithm does not authenticate the ciphertext, it is vulnerable to padding oracle attacks that can let an attacker recover the plaintext. This field contains sensitive information that usually shouldn’t be added to a configuration directly. For more information, see Manage Secrets before adding it to your configuration. Type: string Default: "" # Examples: password: foo # --- password: ${KEY_PASSWORD} tls.enable_renegotiation Whether to allow the remote server to repeatedly request renegotiation. Enable this option if you’re seeing the error message local error: tls: no renegotiation. Type: bool Default: false tls.enabled Whether custom TLS settings are enabled. Type: bool Default: false tls.root_cas An optional root certificate authority to use. This is a string, representing a certificate chain from the parent trusted root certificate, to possible intermediate signing certificates, to the host certificate. This field contains sensitive information that usually shouldn’t be added to a configuration directly. For more information, see Manage Secrets before adding it to your configuration. Type: string Default: "" # Examples: root_cas: |- -----BEGIN CERTIFICATE----- ... -----END CERTIFICATE----- tls.root_cas_file An optional path of a root certificate authority file to use. This is a file, often with a .pem extension, containing a certificate chain from the parent trusted root certificate, to possible intermediate signing certificates, to the host certificate. Type: string Default: "" # Examples: root_cas_file: ./root_cas.pem tls.skip_cert_verify Whether to skip server side certificate verification. Type: bool Default: false token Bearer token for authentication. This field contains sensitive information that usually shouldn’t be added to a configuration directly. For more information, see Manage Secrets before adding it to your configuration. Type: string tps_burst Maximum burst size for rate limiting. Type: int Default: 1 tps_limit Rate limit in requests per second. 0 disables rate limiting. Type: float Default: 0 Performance This output benefits from sending multiple messages in flight in parallel for improved performance. You can tune the max number of in flight messages (or message batches) with the field max_in_flight. This output benefits from sending messages as a batch for improved performance. Batches can be formed at both the input and output level. You can find out more in this doc. Back to top × Simple online edits For simple changes, such as fixing a typo, you can edit the content directly on GitHub. Edit on GitHub Or, open an issue to let us know about something that you want us to change. Open an issue Contribution guide For extensive content updates, or if you prefer to work locally, read our contribution guide . Was this helpful? thumb_up thumb_down group Ask in the community mail Share your feedback group_add Make a contribution 🎉 Thanks for your feedback! amqp_0_9 aws_dynamodb