Quine Configuration
Configuration is supported by Typesafe Config, enabling multiple ways to pass in options. Most commonly, configuration is provided via either Java system properties (passed as command-line options) or via a HOCON config file. HOCON is a JSON-like format that is very flexible and human-readable. The reference config below is in HOCON format.
# Example of setting configuration via configuration file
java \
-Dconfig.file=quine.conf \
-jar quine-1.6.2.jar
# Example of overriding configuration via system properties
java \
-Dquine.webserver.port=9000 \
-Dquine.id.type=uuid-3 \
-jar quine-1.6.2.jar
# Example of overriding configuration via environment variables
CONFIG_FORCE_quine_webserver_port=9000 \
CONFIG_FORCE_quine_id_type=uuid-5 \
java \
-Dconfig.override_with_env_vars=true \
-jar quine-1.6.2.jar
Uncommented values are the defaults, unless otherwise noted. Unexpected configuration keys or
values in the quine block will report an error at startup.
A single underscore _ is used to indicate a required property with no default value. There are none of
these in the default configuration.
quine {
# webserver binding configuration
webserver {
# whether the webserver should be enabled
enabled = true
# Hostname or address of the interface to which the HTTP server should
# be bound - 0.0.0.0 means "all interfaces"
# There are two special values which are interpreted dynamically:
# 1.) "<getHostAddress>" uses the host IP found at runtime
# 2.) "<getHostName>" uses the host DNS name found at runtime
address = "0.0.0.0"
# port to which the HTTP server should be bound
# setting to `0` will choose an available port at random.
port = 8080
}
# (optional) Configuration to use when advertising this server
# (e.g., canonical address), if different than bind
# configuration (e.g., when deployed behind a reverse proxy).
# webserver-advertise {
# Hostname or address using which the application should generate
# user-facing hyperlinks to itself. This should be uniquely
# resolvable from the end-users' client.
# address = "localhost"
# port (on `address`) via which the HTTP server can be reached
# port = 8080
# }
# configuration for the id-assignment scheme the application should use.
id {
# one of [uuid-3, uuid-4, uuid-5, long, byte-array, uuid]
# - uuid-3: generate UUIDv3s according to the RFC specification
# - uuid-4: generate UUIDs labelled as v4, with id() and strId()
# returning random UUIDs, and idFrom returning
# deterministic UUIDs with version 4 identifying bytes
# - uuid-5: generate UUIDv5s according to the RFC specification
# - long: generate random integer IDs in the range
# [-(2^53-1), 2^53-1] -- these may be safely used as
# IEEE double-precision floating-point values without
# loss of precision. This id scheme is not appropriate
# for large-scale datasets because of the high
# likelihood of a collision
# - byte-array: generate unstructured byte arrays as IDs
# - uuid: generate UUIDs with a mix of versions and namespaces
type = uuid
# whether the id scheme should be extended with a host-aware
# partitioning schema. When "true", ids will be prefixed with a
# "partition" key, and two IDs with the same partition key will
# always be managed by the same shard
partitioned = false
# for uuid-5 and uuid-3 configuration, a UUID namespace may also be
# set.
# namespace = "00000000-0000-0000-0000-000000000000"
}
# Selects the order edges between nodes are returned in queries
# one of [reverse-insertion, unordered]
# reverse-insertion means the edges are returned in the reverse
# of the order they were added (that is, from newest to oldest).
edge-iteration = reverse-insertion
# (optional) The number of nodes in a shard's cache before that shard
# will begin to expire nodes from its cache.
in-memory-soft-node-limit = 10000
# (optional) A limit to the total number of nodes in a shard's cache.
# Attempts to create a node that would exceed this limit will return
# an error. This value must always be higher than
# `in-memory-soft-node-limit`
in-memory-hard-node-limit = 75000
# configuration for which data to save about nodes and when to do so
persistence {
# whether to save node journals. "true" uses more disk space and
# enables more functionality, such as historical queries
journal-enabled = true
# one of [on-node-sleep, on-node-update, never]. When to save a
# snapshot of a node's current state, including any DistinctId Standing
# Queries registered on the node
snapshot-schedule = on-node-sleep
# whether only a single snapshot should be retained per-node. If
# false, one snapshot will be saved at each timestamp against which
# a historical query is made
snapshot-singleton = false
# when to save Standing Query partial result (only applies for the
# `MultipleValues` mode -- `DistinctId` Standing Queries always save
# when a node saves a snapshot, regardless of this setting)
standing-query-schedule = on-node-sleep
# whether effects in-memory occur before or after updates are confirmed
# persisted to disk.
# Possible values: memory-first, persistor-first
effect-order = persistor-first
}
# storage backend / "persistor" configuration. There are several
# possible "type"s, non-default options are below (commented out)
store {
# store data in a local filesystem using RocksDB. This is not
# supported in a multi-host cluster
type = rocks-db
# base folder in which RocksDB data will be stored
filepath = "quine.db"
# whether to create any directories in "filepath" that do not yet
# exist
create-parent-dir = no
# whether to use a write-ahead log.
write-ahead-log = on
# whether to force all writes to be fully confirmed to disk. This
# is substantially slower, but maintains data integrity even under
# power loss (write-ahead-log is enough to maintain integrity due
# to process crashes).
sync-all-writes = off
# if set, the number of nodes for which to optimize node creation
# latency
# bloom-filter-size =
}
# store {
# # store data in an Apache Cassandra instance
# type = cassandra
#
# # "host:port" strings at which Cassandra nodes can be accessed from
# # the application
# endpoints = [
# "localhost:9042"
# ]
#
# # the keyspace to use
# keyspace = quine
#
# # whether the application should create the keyspace if it does not
# # yet exist
# should-create-keyspace = true
#
# # whether the application should create tables in the keyspace if
# # they do not yet exist
# should-create-tables = true
#
# # how many copies of each datum the Cassandra cluster should retain
# replication-factor = 1
#
# # how many hosts must agree on a datum for Quine to consider that
# # datum written/read
# write-consistency = LOCAL_QUORUM
# read-consistency = LOCAL_QUORUM
#
# # passed through to Cassandra
# local-datacenter = "datacenter1"
#
# # how long to wait before considering a write operation failed
# write-timeout = "10s"
#
# # how long to wait before considering a read operation failed
# read-timeout = "10s"
#
# # if set, the number of nodes for which to optimize node creation
# # latency
# # bloom-filter-size =
# }
# store {
# # store data in a memory-mapped local file using MapDB. This is not
# # supported in a multi-host cluster
# type = map-db
#
# # base filename from which MapDB filenames will be created. For
# # example, "quine.db", "quine.db.part.3", etc
# filepath = "quine.db"
#
# # whether to create any directories in "filepath" that don't yet exist
# create-parent-dir = no
#
# # how many files to use. MapDB performance slows dramatically above
# # around 2GB per file
# number-partitions = 1
#
# # whether to use a write-ahead log. Does not support Windows hosts.
# write-ahead-log = off
#
# # if write-ahead-log = true, how often to commit the write ahead log
# commit-interval = "10s"
#
# # if set, the number of nodes for which to optimize node creation
# # latency
# # bloom-filter-size =
# }
# store {
# # do not store any data, only use the temporary node cache
# # all writes to the persistor will be a no-op.
# type = empty
# }
# store {
# # Use in-memory maps to simulate a local persistor.
# type = in-memory
# }
# where metrics collected by the application should be reported
metrics-reporters = [
{
# one of [jmx, csv, influxdb, slf4j]
# jmx will report metrics as namespaced MBeans. Other alternatives
# are listed (commented out) below
type = jmx
}
# {
# # create a csv file for each reported metric
# type = csv
#
# # required by csv - the interval at which new rows will be
# # written to the CSV file (for example, 200ms)
# period = _
#
# # required by csv - the directory in which the csv files should
# # be created and written
# log-directory = _
# }
# {
# # report metrics to an influxdb (version 1) database
# type = influxdb
#
# # required by influxdb - the interval at which new records will
# # be written to the database
# period = _
#
# # connection information for the influxdb database
# database = metrics
# scheme = http
# host = localhost
# port = 8086
#
# # authentication information for the influxdb database. Both
# # fields may be omitted
# # user =
# # password =
# }
# {
# # log metrics via an slf4j logger
# type = slf4j
#
# # required by slf4j - the interval at which new records will be
# # logged
# period = _
#
# # logger to which metrics will be logged
# logger-name = metrics
# }
]
# Startup and shutdown timeout for the Quine Application
# The system will throw an error and exit if any component required
# to start or shutdown Quine takes longer that this time
timeout = 2 m
# the property on a node reserved to store that node's labels.
labels-property = "__LABEL"
# the minimum amount of time a node must stay in the cache after
# being updated
decline-sleep-when-write-within = 100 ms
# the minimum amount of time a node must stay in the cache after
# being accessed
decline-sleep-when-access-within = 0 ms
# nodes will wait up to this amount of time before processing messages
# when at-time is in the future (occurs when there is difference in
# the system clock across nodes in the cluster)
max-catch-up-sleep = 2000 ms
# whether the application should log its current config at startup
dump-config = no
# whether on restart quine will resume ingest streams that had been
# running and were interrupted on previous shutdown
should-resume-ingest = no
# which metrics are enabled and their configurations
metrics {
# whether to enable debug metrics (i.e., metrics whose collection may slow down
# the operation of Quine)
enable-debug-metrics = no
}
# send anonymous usage information
help-make-quine-better = true
}