questdb

Beta

Pushes messages to a QuestDB table.

  • 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

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. Review your cluster security before adding it to your configuration.

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. Review your cluster security before adding it to your configuration.

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. Review your cluster security before adding it to your configuration.

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. Review your cluster security before adding it to your configuration.

Type: string

password

The password to use for basic authentication.

This field contains sensitive information. Review your cluster security before adding it to your configuration.

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. Review your cluster security before adding it to your configuration.

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