questdb

Beta

Available in: Self-Managed

Pushes messages to a QuestDB table.

Introduced in version 4.37.0.

Common
Advanced

# Common configuration fields, showing default values
output:
  label: ""
  questdb:
    max_in_flight: 64
    batching:
      count: 0
      byte_size: 0
      period: ""
      check: ""
    address: localhost:9000 # No default (required)
    username: "" # No default (optional)
    password: "" # No default (optional)
    token: "" # No default (optional)
    table: trades # No default (required)
    designated_timestamp_field: "" # No default (optional)
    designated_timestamp_unit: auto
    timestamp_string_fields: [] # No default (optional)
    timestamp_string_format: Jan _2 15:04:05.000000Z0700
    symbols: [] # No default (optional)
    doubles: [] # No default (optional)
    error_on_empty_messages: false

# All configuration fields, showing default values
output:
  label: ""
  questdb:
    max_in_flight: 64
    batching:
      count: 0
      byte_size: 0
      period: ""
      check: ""
      processors: [] # No default (optional)
    tls:
      enabled: false
      skip_cert_verify: false
      enable_renegotiation: false
      root_cas: ""
      root_cas_file: ""
      client_certs: []
    address: localhost:9000 # No default (required)
    username: "" # No default (optional)
    password: "" # No default (optional)
    token: "" # No default (optional)
    retry_timeout: "" # No default (optional)
    request_timeout: "" # No default (optional)
    request_min_throughput: 0 # No default (optional)
    table: trades # No default (required)
    designated_timestamp_field: "" # No default (optional)
    designated_timestamp_unit: auto
    timestamp_string_fields: [] # No default (optional)
    timestamp_string_format: Jan _2 15:04:05.000000Z0700
    symbols: [] # No default (optional)
    doubles: [] # No default (optional)
    error_on_empty_messages: false

Redpanda Data recommends enabling the dedupe feature on the QuestDB server. For more information about deploying, configuring, and using QuestDB, see the QuestDB documentation.

Performance

For improved performance, this output sends multiple messages in parallel. You can tune the maximum number of in-flight messages (or message batches), using the max_in_flight field.

You can configure batches at both the input and output level. For more information, see Message Batching.

Fields

`max_in_flight`

The maximum number of messages to have in flight at a given time. Increase this value to improve throughput.

Type: int

Default: 64

`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.count`

The number of messages after which the batch is flushed. Set to 0 to disable count-based batching.

Type: int

Default: 0

`batching.byte_size`

The amount of bytes at which the batch is flushed. Set to 0 to disable size-based batching.

Type: int

Default: 0

`batching.period`

The period of time after which an incomplete batch is flushed regardless of its size.

Type: string

Default: ""

# Examples
period: 1s
period: 1m
period: 500ms

`batching.check`

A Bloblang query that returns a boolean value indicating whether a message should end a batch.

Type: string

Default: ""

# Examples
check: this.type == "end_of_transaction"

`batching.processors`

For aggregating and archiving message batches, you can add a list of processors to apply to a batch as it is flushed. All resulting messages are flushed as a single batch even when you configure processors to split the batch into smaller batches.

Type: array

# Examples
processors:
  - archive:
      format: concatenate
processors:
  - archive:
      format: lines
processors:
  - archive:
      format: json_array

`tls`

Override system defaults with custom TLS settings.

Type: object

`tls.enabled`

Whether custom TLS settings are enabled.

Type: bool

Default: false

`tls.skip_cert_verify`

Whether to skip server-side certificate verification.

Type: bool

Default: false

`tls.enable_renegotiation`

Whether to allow the remote server to request renegotiation. Enable this option if you’re seeing the error message local error: tls: no renegotiation.

Type: bool

Default: false

Requires version 3.45.0 or newer

`tls.root_cas`

Specify a certificate authority to use (optional). This is a string that represents a certificate chain from the parent trusted root certificate, through 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 Secrets.

Type: string

Default: ""

# Examples
root_cas: |-
  -----BEGIN CERTIFICATE-----
  ...
  -----END CERTIFICATE-----

`tls.root_cas_file`

Specify the path to a root certificate authority file (optional). This is a file, often with a .pem extension, which contains a certificate chain from the parent trusted root certificate, through possible intermediate signing certificates, to the host certificate.certificate.

Type: string

Default: ""

# Examples
root_cas_file: ./root_cas.pem

`tls.client_certs`

A list of client certificates to use. For each certificate specify values for either the cert and key fields, or cert_file and key_file fields.

Type: array

Default: []

# Examples
client_certs:
  - cert: foo
    key: bar
client_certs:
  - cert_file: ./example.pem
    key_file: ./example.key

`tls.client_certs[].cert`

The plain text certificate to use.

Type: string

Default: ""

`tls.client_certs[].key`

The 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 Secrets.

Type: string

Default: ""

`tls.client_certs[].cert_file`

The path to the certificate to use.

Type: string

Default: ""

`tls.client_certs[].key_file`

The path of a certificate key to use.

Type: string

Default: ""

`tls.client_certs[].password`

The 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.

The pbeWithMD5AndDES-CBC algorithm does not authenticate ciphertext, and is vulnerable to padding Oracle attacks which may allow an attacker recover the plain text password.

This field contains sensitive information that usually shouldn’t be added to a configuration directly. For more information, see Secrets.

Type: string

Default: ""

# Examples
password: foo
password: ${KEY_PASSWORD}

`address`

The host and port of the QuestDB server.

Type: string

# Examples
address: localhost:9000

`username`

The username to use for basic authentication.

This field contains sensitive information that usually shouldn’t be added to a configuration directly. For more information, see Secrets.

Type: string

`password`

The password to use for basic authentication.

This field contains sensitive information that usually shouldn’t be added to a configuration directly. For more information, see Secrets.

Type: string

`token`

The bearer token to use for authentication, which takes precedence over the basic authentication username and password.

This field contains sensitive information that usually shouldn’t be added to a configuration directly. For more information, see Secrets.

Type: string

`retry_timeout`

The period of time to continue retrying after a failed HTTP request. The interval between retries is an exponential backoff starting at 10 ms, and doubling after each failed attempt up to a maximum of 1 second.

Type: string

`request_timeout`

The period of time to wait for a response from the QuestDB server in addition to any connection timeout calculated for the request_min_throughput field.

Type: string

`request_min_throughput`

The minimum expected throughput in bytes per second for HTTP requests. If the throughput is lower than this value, the connection times out. The quest_db output uses this value to calculate an additional timeout on top of the request_timeout. This setting is useful for large requests. Set it to 0 to disable this logic.

Type: int

`table`

The destination table in QuestDB.

Type: string

# Examples
table: trades

`designated_timestamp_field`

The name of the designated timestamp field in QuestDB.

Type: string

`designated_timestamp_unit`

Units used for the designated timestamp field in QuestDB.

Type: string

Default: auto

`timestamp_string_fields`

String fields with textual timestamps.

Type: array

`timestamp_string_format`

The timestamp format, which is used when parsing timestamp string fields and uses Golang’s time formatting.

Type: string

Default: Jan _2 15:04:05.000000Z0700

`symbols`

Columns that must be the symbol type. String values default to string types.

Type: array

`doubles`

Columns that must be the double type, with int as the default.

Type: array

`error_on_empty_messages`

Mark a message as an error if it is empty after field validation.

Type: bool

Default: false

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questdb

Performance

Fields

max_in_flight

batching

batching.count

batching.byte_size

batching.period

batching.check

batching.processors

tls

tls.enabled

tls.skip_cert_verify

tls.enable_renegotiation

tls.root_cas

tls.root_cas_file

tls.client_certs

tls.client_certs[].cert

tls.client_certs[].key

tls.client_certs[].cert_file

tls.client_certs[].key_file

tls.client_certs[].password

address

username

password

token

retry_timeout

request_timeout

request_min_throughput

table

designated_timestamp_field

designated_timestamp_unit

timestamp_string_fields

timestamp_string_format

symbols

doubles

error_on_empty_messages

Simple online edits

Contribution guide

`max_in_flight`

`batching`

`batching.count`

`batching.byte_size`

`batching.period`

`batching.check`

`batching.processors`

`tls`

`tls.enabled`

`tls.skip_cert_verify`

`tls.enable_renegotiation`

`tls.root_cas`

`tls.root_cas_file`

`tls.client_certs`

`tls.client_certs[].cert`

`tls.client_certs[].key`

`tls.client_certs[].cert_file`

`tls.client_certs[].key_file`

`tls.client_certs[].password`

`address`

`username`

`password`

`token`

`retry_timeout`

`request_timeout`

`request_min_throughput`

`table`

`designated_timestamp_field`

`designated_timestamp_unit`

`timestamp_string_fields`

`timestamp_string_format`

`symbols`

`doubles`

`error_on_empty_messages`