commit 178de8180ef34ac143fa89df0069c2bbf9a234cf Author: Reinaldy Rafli Date: Fri Jun 24 09:20:41 2022 +0700 intialize repository diff --git a/LICENSE b/LICENSE new file mode 100644 index 0000000..6b83099 --- /dev/null +++ b/LICENSE @@ -0,0 +1,21 @@ +MIT License + +Copyright (c) 2022 Reinaldy Rafli + +Permission is hereby granted, free of charge, to any person obtaining a copy +of this software and associated documentation files (the "Software"), to deal +in the Software without restriction, including without limitation the rights +to use, copy, modify, merge, publish, distribute, sublicense, and/or sell +copies of the Software, and to permit persons to whom the Software is +furnished to do so, subject to the following conditions: + +The above copyright notice and this permission notice shall be included in all +copies or substantial portions of the Software. + +THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR +IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, +FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE +AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER +LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, +OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE +SOFTWARE. \ No newline at end of file diff --git a/README.md b/README.md new file mode 100644 index 0000000..c8c26af --- /dev/null +++ b/README.md @@ -0,0 +1,43 @@ +# Local ScylladB Cluster with Docker Compose + +Sets up a local ScyllaDB v4.5 cluster with 3 nodes. + +To add new nodes, just modify the `docker-compose.yml` file and add another ScyllaDB instance, +then point the new instance name to the `--seeds` command value on other nodes. Then you are +good to go. + +To run it: + +```sh +docker compose up -d +``` + +There is no authentication being set up. If you want to enable authentication, change `scylla.yaml` +file on line 237 to `PasswordAuthenticator` and line 249 to `CassandraAuthorizer`. You should read +Cassandra or ScyllaDB documentation about creating a username-password combination. + +Obviously don't use it on a production environment. + +To connect with Go: + +```go +package main + +import ( + "time" + + "github.com/gocql/gocql" +) + +func main() { + session := gocql.NewSession(gocql.ClusterConfig{ + Hosts: []string{"localhost:9042", "localhost:9043", "localhost:9044"}, + Timeout: 3 * time.Second, + ConnectTimeout: 3 * time.Second, + Consistency: gocql.Quorum, + }) + defer session.Close() + + // do things with session +} +``` \ No newline at end of file diff --git a/cassandra-rackdc.properties b/cassandra-rackdc.properties new file mode 100644 index 0000000..53d377f --- /dev/null +++ b/cassandra-rackdc.properties @@ -0,0 +1,15 @@ +# +# cassandra-rackdc.properties +# +# The lines may include white spaces at the beginning and the end. +# The rack and data center names may also include white spaces. +# All trailing and leading white spaces will be trimmed. +# +dc=your_datacenter +rack=your_rack +# prefer_local= +# dc_suffix= +# + + + \ No newline at end of file diff --git a/docker-compose.yml b/docker-compose.yml new file mode 100644 index 0000000..54553ce --- /dev/null +++ b/docker-compose.yml @@ -0,0 +1,110 @@ +services: + scylla-node1: + image: scylladb/scylla:4.5.6 + command: --listen-address=172.20.0.10 --smp=1 + ports: + - 9042:9042 + networks: + scylla_cluster: + ipv4_address: 172.20.0.10 + deploy: + restart_policy: + condition: on-failure + delay: 10s + max_attempts: 10 + window: 30s + resources: + limits: + cpus: '4' + reservations: + cpus: '0.1' + healthcheck: + test: ["CMD-SHELL", "[ $$(nodetool statusgossip) = running ]"] + interval: 30s + timeout: 20s + retries: 10 + start_period: 120s + volumes: + - scylla-node1-data:/var/lib/scylla + - ./scylla.yaml:/etc/scylla/scylla.yaml + - ./cassandra-rackdc.properties:/etc/scylla/cassandra-rackdc.properties + + scylla-node2: + image: scylladb/scylla:4.5.6 + command: --seeds=scylla-node1,scylla-node3 --listen-address=172.20.0.11 --smp=1 + ports: + - 9043:9042 + networks: + scylla_cluster: + ipv4_address: 172.20.0.11 + deploy: + restart_policy: + condition: on-failure + delay: 10s + max_attempts: 10 + window: 30s + resources: + limits: + cpus: '4' + reservations: + cpus: '0.1' + healthcheck: + test: ["CMD-SHELL", "[ $$(nodetool statusgossip) = running ]"] + interval: 30s + timeout: 20s + retries: 10 + start_period: 120s + depends_on: + scylla-node1: + condition: service_healthy + volumes: + - scylla-node2-data:/var/lib/scylla + - ./scylla.yaml:/etc/scylla/scylla.yaml + - ./cassandra-rackdc.properties:/etc/scylla/cassandra-rackdc.properties + + scylla-node3: + image: scylladb/scylla:4.5.6 + command: --seeds=scylla-node1 --listen-address=172.20.0.12 --smp=1 + ports: + - 9044:9042 + networks: + scylla_cluster: + ipv4_address: 172.20.0.12 + deploy: + restart_policy: + condition: on-failure + delay: 10s + max_attempts: 10 + window: 30s + resources: + limits: + cpus: '4' + reservations: + cpus: '0.1' + healthcheck: + test: ["CMD-SHELL", "[ $$(nodetool statusgossip) = running ]"] + interval: 30s + timeout: 20s + retries: 10 + start_period: 120s + depends_on: + scylla-node1: + condition: service_healthy + scylla-node2: + condition: service_started + volumes: + - scylla-node3-data:/var/lib/scylla + - ./scylla.yaml:/etc/scylla/scylla.yaml + - ./cassandra-rackdc.properties:/etc/scylla/cassandra-rackdc.properties + +volumes: + scylla-node1-data: + scylla-node2-data: + scylla-node3-data: + +networks: + scylla_cluster: + driver: bridge + ipam: + config: + - subnet: 172.20.0.0/24 \ No newline at end of file diff --git a/scylla.yaml b/scylla.yaml new file mode 100644 index 0000000..c37d6a9 --- /dev/null +++ b/scylla.yaml @@ -0,0 +1,541 @@ +# Scylla storage config YAML + +####################################### +# This file is split to two sections: +# 1. Supported parameters +# 2. Unsupported parameters: reserved for future use or backwards +# compatibility. +# Scylla will only read and use the first segment +####################################### + +### Supported Parameters + +# The name of the cluster. This is mainly used to prevent machines in +# one logical cluster from joining another. +# It is recommended to change the default value when creating a new cluster. +# You can NOT modify this value for an existing cluster +#cluster_name: 'Test Cluster' + +# This defines the number of tokens randomly assigned to this node on the ring +# The more tokens, relative to other nodes, the larger the proportion of data +# that this node will store. You probably want all nodes to have the same number +# of tokens assuming they have equal hardware capability. +num_tokens: 256 + +# Directory where Scylla should store all its files, which are commitlog, +# data, hints, view_hints and saved_caches subdirectories. All of these +# subs can be overriden by the respective options below. +# If unset, the value defaults to /var/lib/scylla +# workdir: /var/lib/scylla + +# Directory where Scylla should store data on disk. +# data_file_directories: +# - /var/lib/scylla/data + +# commit log. when running on magnetic HDD, this should be a +# separate spindle than the data directories. +# commitlog_directory: /var/lib/scylla/commitlog + +# commitlog_sync may be either "periodic" or "batch." +# +# When in batch mode, Scylla won't ack writes until the commit log +# has been fsynced to disk. It will wait +# commitlog_sync_batch_window_in_ms milliseconds between fsyncs. +# This window should be kept short because the writer threads will +# be unable to do extra work while waiting. (You may need to increase +# concurrent_writes for the same reason.) +# +# commitlog_sync: batch +# commitlog_sync_batch_window_in_ms: 2 +# +# the other option is "periodic" where writes may be acked immediately +# and the CommitLog is simply synced every commitlog_sync_period_in_ms +# milliseconds. +commitlog_sync: periodic +commitlog_sync_period_in_ms: 10000 + +# The size of the individual commitlog file segments. A commitlog +# segment may be archived, deleted, or recycled once all the data +# in it (potentially from each columnfamily in the system) has been +# flushed to sstables. +# +# The default size is 32, which is almost always fine, but if you are +# archiving commitlog segments (see commitlog_archiving.properties), +# then you probably want a finer granularity of archiving; 8 or 16 MB +# is reasonable. +commitlog_segment_size_in_mb: 32 + +# seed_provider class_name is saved for future use. +# A seed address is mandatory. +seed_provider: + # The addresses of hosts that will serve as contact points for the joining node. + # It allows the node to discover the cluster ring topology on startup (when + # joining the cluster). + # Once the node has joined the cluster, the seed list has no function. + - class_name: org.apache.cassandra.locator.SimpleSeedProvider + parameters: + # In a new cluster, provide the address of the first node. + # In an existing cluster, specify the address of at least one existing node. + # If you specify addresses of more than one node, use a comma to separate them. + # For example: ",," + - seeds: "127.0.0.1" + +# Address to bind to and tell other Scylla nodes to connect to. +# You _must_ change this if you want multiple nodes to be able to communicate! +# +# If you leave broadcast_address (below) empty, then setting listen_address +# to 0.0.0.0 is wrong as other nodes will not know how to reach this node. +# If you set broadcast_address, then you can set listen_address to 0.0.0.0. +listen_address: 0.0.0.0 + +# Address to broadcast to other Scylla nodes +# Leaving this blank will set it to the same value as listen_address +# broadcast_address: 1.2.3.4 + + +# When using multiple physical network interfaces, set this to true to listen on broadcast_address +# in addition to the listen_address, allowing nodes to communicate in both interfaces. +# Ignore this property if the network configuration automatically routes between the public and private networks such as EC2. +# +# listen_on_broadcast_address: false + +# port for the CQL native transport to listen for clients on +# For security reasons, you should not expose this port to the internet. Firewall it if needed. +# To disable the CQL native transport, remove this option and configure native_transport_port_ssl. +native_transport_port: 9042 + +# Like native_transport_port, but clients are forwarded to specific shards, based on the +# client-side port numbers. +native_shard_aware_transport_port: 19042 + +# Enabling native transport encryption in client_encryption_options allows you to either use +# encryption for the standard port or to use a dedicated, additional port along with the unencrypted +# standard native_transport_port. +# Enabling client encryption and keeping native_transport_port_ssl disabled will use encryption +# for native_transport_port. Setting native_transport_port_ssl to a different value +# from native_transport_port will use encryption for native_transport_port_ssl while +# keeping native_transport_port unencrypted. +#native_transport_port_ssl: 9142 + +# Like native_transport_port_ssl, but clients are forwarded to specific shards, based on the +# client-side port numbers. +#native_shard_aware_transport_port_ssl: 19142 + +# How long the coordinator should wait for read operations to complete +read_request_timeout_in_ms: 5000 + +# How long the coordinator should wait for writes to complete +write_request_timeout_in_ms: 2000 +# how long a coordinator should continue to retry a CAS operation +# that contends with other proposals for the same row +cas_contention_timeout_in_ms: 1000 + +# phi value that must be reached for a host to be marked down. +# most users should never need to adjust this. +# phi_convict_threshold: 8 + +# IEndpointSnitch. The snitch has two functions: +# - it teaches Scylla enough about your network topology to route +# requests efficiently +# - it allows Scylla to spread replicas around your cluster to avoid +# correlated failures. It does this by grouping machines into +# "datacenters" and "racks." Scylla will do its best not to have +# more than one replica on the same "rack" (which may not actually +# be a physical location) +# +# IF YOU CHANGE THE SNITCH AFTER DATA IS INSERTED INTO THE CLUSTER, +# YOU MUST RUN A FULL REPAIR, SINCE THE SNITCH AFFECTS WHERE REPLICAS +# ARE PLACED. +# +# Out of the box, Scylla provides +# - SimpleSnitch: +# Treats Strategy order as proximity. This can improve cache +# locality when disabling read repair. Only appropriate for +# single-datacenter deployments. +# - GossipingPropertyFileSnitch +# This should be your go-to snitch for production use. The rack +# and datacenter for the local node are defined in +# cassandra-rackdc.properties and propagated to other nodes via +# gossip. If cassandra-topology.properties exists, it is used as a +# fallback, allowing migration from the PropertyFileSnitch. +# - PropertyFileSnitch: +# Proximity is determined by rack and data center, which are +# explicitly configured in cassandra-topology.properties. +# - Ec2Snitch: +# Appropriate for EC2 deployments in a single Region. Loads Region +# and Availability Zone information from the EC2 API. The Region is +# treated as the datacenter, and the Availability Zone as the rack. +# Only private IPs are used, so this will not work across multiple +# Regions. +# - Ec2MultiRegionSnitch: +# Uses public IPs as broadcast_address to allow cross-region +# connectivity. (Thus, you should set seed addresses to the public +# IP as well.) You will need to open the storage_port or +# ssl_storage_port on the public IP firewall. (For intra-Region +# traffic, Scylla will switch to the private IP after +# establishing a connection.) +# - RackInferringSnitch: +# Proximity is determined by rack and data center, which are +# assumed to correspond to the 3rd and 2nd octet of each node's IP +# address, respectively. Unless this happens to match your +# deployment conventions, this is best used as an example of +# writing a custom Snitch class and is provided in that spirit. +# +# You can use a custom Snitch by setting this to the full class name +# of the snitch, which will be assumed to be on your classpath. +endpoint_snitch: GossipingPropertyFileSnitch + +# The address or interface to bind the Thrift RPC service and native transport +# server to. +# +# Set rpc_address OR rpc_interface, not both. Interfaces must correspond +# to a single address, IP aliasing is not supported. +# +# Leaving rpc_address blank has the same effect as on listen_address +# (i.e. it will be based on the configured hostname of the node). +# +# Note that unlike listen_address, you can specify 0.0.0.0, but you must also +# set broadcast_rpc_address to a value other than 0.0.0.0. +# +# For security reasons, you should not expose this port to the internet. Firewall it if needed. +# +# If you choose to specify the interface by name and the interface has an ipv4 and an ipv6 address +# you can specify which should be chosen using rpc_interface_prefer_ipv6. If false the first ipv4 +# address will be used. If true the first ipv6 address will be used. Defaults to false preferring +# ipv4. If there is only one address it will be selected regardless of ipv4/ipv6. +rpc_address: localhost +# rpc_interface: eth1 +# rpc_interface_prefer_ipv6: false + +# port for Thrift to listen for clients on +rpc_port: 9160 + +# port for REST API server +api_port: 10000 + +# IP for the REST API server +api_address: 0.0.0.0 + +# Log WARN on any batch size exceeding this value. 128 kiB per batch by default. +# Caution should be taken on increasing the size of this threshold as it can lead to node instability. +batch_size_warn_threshold_in_kb: 128 + +# Fail any multiple-partition batch exceeding this value. 1 MiB (8x warn threshold) by default. +batch_size_fail_threshold_in_kb: 1024 + +# Authentication backend, identifying users +# Out of the box, Scylla provides org.apache.cassandra.auth.{AllowAllAuthenticator, +# PasswordAuthenticator}. +# +# - AllowAllAuthenticator performs no checks - set it to disable authentication. +# - PasswordAuthenticator relies on username/password pairs to authenticate +# users. It keeps usernames and hashed passwords in system_auth.credentials table. +# Please increase system_auth keyspace replication factor if you use this authenticator. +# - com.scylladb.auth.TransitionalAuthenticator requires username/password pair +# to authenticate in the same manner as PasswordAuthenticator, but improper credentials +# result in being logged in as an anonymous user. Use for upgrading clusters' auth. +authenticator: AllowAllAuthenticator + +# Authorization backend, implementing IAuthorizer; used to limit access/provide permissions +# Out of the box, Scylla provides org.apache.cassandra.auth.{AllowAllAuthorizer, +# CassandraAuthorizer}. +# +# - AllowAllAuthorizer allows any action to any user - set it to disable authorization. +# - CassandraAuthorizer stores permissions in system_auth.permissions table. Please +# increase system_auth keyspace replication factor if you use this authorizer. +# - com.scylladb.auth.TransitionalAuthorizer wraps around the CassandraAuthorizer, using it for +# authorizing permission management. Otherwise, it allows all. Use for upgrading +# clusters' auth. +authorizer: AllowAllAuthorizer + +# initial_token allows you to specify tokens manually. While you can use # it with +# vnodes (num_tokens > 1, above) -- in which case you should provide a +# comma-separated list -- it's primarily used when adding nodes # to legacy clusters +# that do not have vnodes enabled. +# initial_token: + +# RPC address to broadcast to drivers and other Scylla nodes. This cannot +# be set to 0.0.0.0. If left blank, this will be set to the value of +# rpc_address. If rpc_address is set to 0.0.0.0, broadcast_rpc_address must +# be set. +# broadcast_rpc_address: 1.2.3.4 + +# Uncomment to enable experimental features +# experimental_features: +# - udf +# - alternator-streams +# - alternator-ttl +# - raft + +# The directory where hints files are stored if hinted handoff is enabled. +# hints_directory: /var/lib/scylla/hints + +# The directory where hints files are stored for materialized-view updates +# view_hints_directory: /var/lib/scylla/view_hints + +# See https://docs.scylladb.com/architecture/anti-entropy/hinted-handoff +# May either be "true" or "false" to enable globally, or contain a list +# of data centers to enable per-datacenter. +# hinted_handoff_enabled: DC1,DC2 +# hinted_handoff_enabled: true + +# this defines the maximum amount of time a dead host will have hints +# generated. After it has been dead this long, new hints for it will not be +# created until it has been seen alive and gone down again. +# max_hint_window_in_ms: 10800000 # 3 hours + + +# Validity period for permissions cache (fetching permissions can be an +# expensive operation depending on the authorizer, CassandraAuthorizer is +# one example). Defaults to 10000, set to 0 to disable. +# Will be disabled automatically for AllowAllAuthorizer. +# permissions_validity_in_ms: 10000 + +# Refresh interval for permissions cache (if enabled). +# After this interval, cache entries become eligible for refresh. Upon next +# access, an async reload is scheduled and the old value returned until it +# completes. If permissions_validity_in_ms is non-zero, then this also must have +# a non-zero value. Defaults to 2000. It's recommended to set this value to +# be at least 3 times smaller than the permissions_validity_in_ms. +# permissions_update_interval_in_ms: 2000 + +# The partitioner is responsible for distributing groups of rows (by +# partition key) across nodes in the cluster. You should leave this +# alone for new clusters. The partitioner can NOT be changed without +# reloading all data, so when upgrading you should set this to the +# same partitioner you were already using. +# +# Murmur3Partitioner is currently the only supported partitioner, +# +partitioner: org.apache.cassandra.dht.Murmur3Partitioner + +# Total space to use for commitlogs. +# +# If space gets above this value (it will round up to the next nearest +# segment multiple), Scylla will flush every dirty CF in the oldest +# segment and remove it. So a small total commitlog space will tend +# to cause more flush activity on less-active columnfamilies. +# +# A value of -1 (default) will automatically equate it to the total amount of memory +# available for Scylla. +commitlog_total_space_in_mb: -1 + +# TCP port, for commands and data +# For security reasons, you should not expose this port to the internet. Firewall it if needed. +storage_port: 7000 + +# SSL port, for encrypted communication. Unused unless enabled in +# encryption_options +# For security reasons, you should not expose this port to the internet. Firewall it if needed. +# ssl_storage_port: 7001 + +# listen_interface: eth0 +# listen_interface_prefer_ipv6: false + +# Whether to start the native transport server. +# Please note that the address on which the native transport is bound is the +# same as the rpc_address. The port however is different and specified below. +# start_native_transport: true + +# The maximum size of allowed frame. Frame (requests) larger than this will +# be rejected as invalid. The default is 256MB. +# native_transport_max_frame_size_in_mb: 256 + +# Whether to start the thrift rpc server. +start_rpc: true + +# enable or disable keepalive on rpc/native connections +# rpc_keepalive: true + +# Set to true to have Scylla create a hard link to each sstable +# flushed or streamed locally in a backups/ subdirectory of the +# keyspace data. Removing these links is the operator's +# responsibility. +# incremental_backups: false + +# Whether or not to take a snapshot before each compaction. Be +# careful using this option, since Scylla won't clean up the +# snapshots for you. Mostly useful if you're paranoid when there +# is a data format change. +# snapshot_before_compaction: false + +# Whether or not a snapshot is taken of the data before keyspace truncation +# or dropping of column families. The STRONGLY advised default of true +# should be used to provide data safety. If you set this flag to false, you will +# lose data on truncation or drop. +# auto_snapshot: true + +# When executing a scan, within or across a partition, we need to keep the +# tombstones seen in memory so we can return them to the coordinator, which +# will use them to make sure other replicas also know about the deleted rows. +# With workloads that generate a lot of tombstones, this can cause performance +# problems and even exaust the server heap. +# (http://www.datastax.com/dev/blog/cassandra-anti-patterns-queues-and-queue-like-datasets) +# Adjust the thresholds here if you understand the dangers and want to +# scan more tombstones anyway. These thresholds may also be adjusted at runtime +# using the StorageService mbean. +# tombstone_warn_threshold: 1000 +# tombstone_failure_threshold: 100000 + +# Granularity of the collation index of rows within a partition. +# Increase if your rows are large, or if you have a very large +# number of rows per partition. The competing goals are these: +# 1) a smaller granularity means more index entries are generated +# and looking up rows withing the partition by collation column +# is faster +# 2) but, Scylla will keep the collation index in memory for hot +# rows (as part of the key cache), so a larger granularity means +# you can cache more hot rows +# column_index_size_in_kb: 64 + +# Auto-scaling of the promoted index prevents running out of memory +# when the promoted index grows too large (due to partitions with many rows +# vs. too small column_index_size_in_kb). When the serialized representation +# of the promoted index grows by this threshold, the desired block size +# for this partition (initialized to column_index_size_in_kb) +# is doubled, to decrease the sampling resolution by half. +# +# To disable promoted index auto-scaling, set the threshold to 0. +# column_index_auto_scale_threshold_in_kb: 10240 + +# Log a warning when writing partitions larger than this value +# compaction_large_partition_warning_threshold_mb: 1000 + +# Log a warning when writing rows larger than this value +# compaction_large_row_warning_threshold_mb: 10 + +# Log a warning when writing cells larger than this value +# compaction_large_cell_warning_threshold_mb: 1 + +# Log a warning when row number is larger than this value +# compaction_rows_count_warning_threshold: 100000 + +# How long the coordinator should wait for seq or index scans to complete +# range_request_timeout_in_ms: 10000 +# How long the coordinator should wait for writes to complete +# counter_write_request_timeout_in_ms: 5000 +# How long a coordinator should continue to retry a CAS operation +# that contends with other proposals for the same row +# cas_contention_timeout_in_ms: 1000 +# How long the coordinator should wait for truncates to complete +# (This can be much longer, because unless auto_snapshot is disabled +# we need to flush first so we can snapshot before removing the data.) +# truncate_request_timeout_in_ms: 60000 +# The default timeout for other, miscellaneous operations +# request_timeout_in_ms: 10000 + +# Enable or disable inter-node encryption. +# You must also generate keys and provide the appropriate key and trust store locations and passwords. +# +# The available internode options are : all, none, dc, rack +# If set to dc scylla will encrypt the traffic between the DCs +# If set to rack scylla will encrypt the traffic between the racks +# +# SSL/TLS algorithm and ciphers used can be controlled by +# the priority_string parameter. Info on priority string +# syntax and values is available at: +# https://gnutls.org/manual/html_node/Priority-Strings.html +# +# The require_client_auth parameter allows you to +# restrict access to service based on certificate +# validation. Client must provide a certificate +# accepted by the used trust store to connect. +# +# server_encryption_options: +# internode_encryption: none +# certificate: conf/scylla.crt +# keyfile: conf/scylla.key +# truststore: +# certficate_revocation_list: +# require_client_auth: False +# priority_string: + +# enable or disable client/server encryption. +# client_encryption_options: +# enabled: false +# certificate: conf/scylla.crt +# keyfile: conf/scylla.key +# truststore: +# certficate_revocation_list: +# require_client_auth: False +# priority_string: + +# internode_compression controls whether traffic between nodes is +# compressed. +# can be: all - all traffic is compressed +# dc - traffic between different datacenters is compressed +# none - nothing is compressed. +# internode_compression: none + +# Enable or disable tcp_nodelay for inter-dc communication. +# Disabling it will result in larger (but fewer) network packets being sent, +# reducing overhead from the TCP protocol itself, at the cost of increasing +# latency if you block for cross-datacenter responses. +# inter_dc_tcp_nodelay: false + +# Relaxation of environment checks. +# +# Scylla places certain requirements on its environment. If these requirements are +# not met, performance and reliability can be degraded. +# +# These requirements include: +# - A filesystem with good support for aysnchronous I/O (AIO). Currently, +# this means XFS. +# +# false: strict environment checks are in place; do not start if they are not met. +# true: relaxed environment checks; performance and reliability may degraade. +# +developer_mode: true + + +# Idle-time background processing +# +# Scylla can perform certain jobs in the background while the system is otherwise idle, +# freeing processor resources when there is other work to be done. +# +# defragment_memory_on_idle: true +# +# prometheus port +# By default, Scylla opens prometheus API port on port 9180 +# setting the port to 0 will disable the prometheus API. +# prometheus_port: 9180 +# +# prometheus address +# Leaving this blank will set it to the same value as listen_address. +# This means that by default, Scylla listens to the prometheus API on the same +# listening address (and therefore network interface) used to listen for +# internal communication. If the monitoring node is not in this internal +# network, you can override prometheus_address explicitly - e.g., setting +# it to 0.0.0.0 to listen on all interfaces. +# prometheus_address: 1.2.3.4 + +# Distribution of data among cores (shards) within a node +# +# Scylla distributes data within a node among shards, using a round-robin +# strategy: +# [shard0] [shard1] ... [shardN-1] [shard0] [shard1] ... [shardN-1] ... +# +# Scylla versions 1.6 and below used just one repetition of the pattern; +# this intefered with data placement among nodes (vnodes). +# +# Scylla versions 1.7 and above use 4096 repetitions of the pattern; this +# provides for better data distribution. +# +# the value below is log (base 2) of the number of repetitions. +# +# Set to 0 to avoid rewriting all data when upgrading from Scylla 1.6 and +# below. +# +# Keep at 12 for new clusters. +murmur3_partitioner_ignore_msb_bits: 12 + +# Bypass in-memory data cache (the row cache) when performing reversed queries. +# reversed_reads_auto_bypass_cache: false + +# Use a new optimized algorithm for performing reversed reads. +# Set to `false` to fall-back to the old algorithm. +# enable_optimized_reversed_reads: true + +# Use on a new, parallel algorithm for performing aggregate queries. +# Set to `false` to fall-back to the old algorithm. +# enable_parallelized_aggregation: true \ No newline at end of file