apiVersion: v1
kind: ConfigMap
metadata:
  name: scylla-config
data:
   scylla.yaml: |
    # 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.
    #
    # If you already have a cluster with 1 token per node, and wish to migrate to 
    # multiple tokens per node, see http://cassandra.apache.org/doc/latest/operating
    num_tokens: 256

    # Directory where Scylla should store data on disk.
    # If not set, the default directory is /var/lib/scylla/data.
    data_file_directories:
        - /var/lib/scylla/data

    # commit log.  when running on magnetic HDD, this should be a
    # separate spindle than the data directories.
    # If not set, the default directory is /var/lib/scylla/commitlog.
    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.
    # seeds address(es) are mandatory!
    seed_provider:
        # Addresses of hosts that are deemed contact points. 
        # Scylla nodes use this list of hosts to find each other and learn
        # the topology of the ring.  You must change this if you are running
        # multiple nodes!
        - class_name: org.apache.cassandra.locator.SimpleSeedProvider
          parameters:
            # seeds is actually a comma-delimited list of addresses.
            # Ex: "<ip1>,<ip2>,<ip3>"
            - seeds: "127.0.0.1"

    # Address or interface 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!
    #
    # Setting listen_address to 0.0.0.0 is always wrong.
    listen_address: localhost

    # 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.
    native_transport_port: 9042

    # 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

    # 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: 10000
    # 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: SimpleSnitch

    # 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: 127.0.0.1

    # Log WARN on any batch size exceeding this value. 5kb 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: 5

    # Fail any multiple-partition batch exceeding this value. 50kb (10x warn threshold) by default.
    batch_size_fail_threshold_in_kb: 50

    # 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.
    # 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.
    # 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:
    #     - cdc
    #     - lwt
    #     - udf

    # 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

    # Maximum throttle in KBs per second, per delivery thread.  This will be
    # reduced proportionally to the number of nodes in the cluster.  (If there
    # are two nodes in the cluster, each delivery thread will use the maximum
    # rate; if there are three, each will throttle to half of the maximum,
    # since we expect two nodes to be delivering hints simultaneously.)
    # hinted_handoff_throttle_in_kb: 1024
    # Number of threads with which to deliver hints;
    # Consider increasing this number when you have multi-dc deployments, since
    # cross-dc handoff tends to be slower
    # max_hints_delivery_threads: 2

    ###################################################
    ## Not currently supported, reserved for future use
    ###################################################

    # Maximum throttle in KBs per second, total. This will be
    # reduced proportionally to the number of nodes in the cluster.
    # batchlog_replay_throttle_in_kb: 1024

    # 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.
    #
    # Besides Murmur3Partitioner, partitioners included for backwards
    # compatibility include RandomPartitioner, ByteOrderedPartitioner, and
    # OrderPreservingPartitioner.
    #
    partitioner: org.apache.cassandra.dht.Murmur3Partitioner

    # Maximum size of the key cache in memory.
    #
    # Each key cache hit saves 1 seek and each row cache hit saves 2 seeks at the
    # minimum, sometimes more. The key cache is fairly tiny for the amount of
    # time it saves, so it's worthwhile to use it at large numbers.
    # The row cache saves even more time, but must contain the entire row,
    # so it is extremely space-intensive. It's best to only use the
    # row cache if you have hot rows or static rows.
    #
    # NOTE: if you reduce the size, you may not get you hottest keys loaded on startup.
    #
    # Default value is empty to make it "auto" (min(5% of Heap (in MB), 100MB)). Set to 0 to disable key cache.
    # key_cache_size_in_mb:

    # Duration in seconds after which Scylla should
    # save the key cache. Caches are saved to saved_caches_directory as
    # specified in this configuration file.
    #
    # Saved caches greatly improve cold-start speeds, and is relatively cheap in
    # terms of I/O for the key cache. Row cache saving is much more expensive and
    # has limited use.
    #
    # Default is 14400 or 4 hours.
    # key_cache_save_period: 14400

    # Number of keys from the key cache to save
    # Disabled by default, meaning all keys are going to be saved
    # key_cache_keys_to_save: 100

    # Maximum size of the row cache in memory.
    # NOTE: if you reduce the size, you may not get you hottest keys loaded on startup.
    #
    # Default value is 0, to disable row caching.
    # row_cache_size_in_mb: 0

    # Duration in seconds after which Scylla should
    # save the row cache. Caches are saved to saved_caches_directory as specified
    # in this configuration file.
    #
    # Saved caches greatly improve cold-start speeds, and is relatively cheap in
    # terms of I/O for the key cache. Row cache saving is much more expensive and
    # has limited use.
    #
    # Default is 0 to disable saving the row cache.
    # row_cache_save_period: 0

    # Number of keys from the row cache to save
    # Disabled by default, meaning all keys are going to be saved
    # row_cache_keys_to_save: 100

    # Maximum size of the counter cache in memory.
    #
    # Counter cache helps to reduce counter locks' contention for hot counter cells.
    # In case of RF = 1 a counter cache hit will cause Scylla to skip the read before
    # write entirely. With RF > 1 a counter cache hit will still help to reduce the duration
    # of the lock hold, helping with hot counter cell updates, but will not allow skipping
    # the read entirely. Only the local (clock, count) tuple of a counter cell is kept
    # in memory, not the whole counter, so it's relatively cheap.
    #
    # NOTE: if you reduce the size, you may not get you hottest keys loaded on startup.
    #
    # Default value is empty to make it "auto" (min(2.5% of Heap (in MB), 50MB)). Set to 0 to disable counter cache.
    # NOTE: if you perform counter deletes and rely on low gcgs, you should disable the counter cache.
    # counter_cache_size_in_mb:

    # Duration in seconds after which Scylla should
    # save the counter cache (keys only). Caches are saved to saved_caches_directory as
    # specified in this configuration file.
    #
    # Default is 7200 or 2 hours.
    # counter_cache_save_period: 7200

    # Number of keys from the counter cache to save
    # Disabled by default, meaning all keys are going to be saved
    # counter_cache_keys_to_save: 100

    # The off-heap memory allocator.  Affects storage engine metadata as
    # well as caches.  Experiments show that JEMAlloc saves some memory
    # than the native GCC allocator (i.e., JEMalloc is more
    # fragmentation-resistant).
    # 
    # Supported values are: NativeAllocator, JEMallocAllocator
    #
    # If you intend to use JEMallocAllocator you have to install JEMalloc as library and
    # modify cassandra-env.sh as directed in the file.
    #
    # Defaults to NativeAllocator
    # memory_allocator: NativeAllocator

    # saved caches
    # If not set, the default directory is /var/lib/scylla/saved_caches.
    # saved_caches_directory: /var/lib/scylla/saved_caches



    # For workloads with more data than can fit in memory, Scylla's
    # bottleneck will be reads that need to fetch data from
    # disk. "concurrent_reads" should be set to (16 * number_of_drives) in
    # order to allow the operations to enqueue low enough in the stack
    # that the OS and drives can reorder them. Same applies to
    # "concurrent_counter_writes", since counter writes read the current
    # values before incrementing and writing them back.
    #
    # On the other hand, since writes are almost never IO bound, the ideal
    # number of "concurrent_writes" is dependent on the number of cores in
    # your system; (8 * number_of_cores) is a good rule of thumb.
    # concurrent_reads: 32
    # concurrent_writes: 32
    # concurrent_counter_writes: 32

    # Total memory to use for sstable-reading buffers.  Defaults to
    # the smaller of 1/4 of heap or 512MB.
    # file_cache_size_in_mb: 512

    # 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

    # A fixed memory pool size in MB for for SSTable index summaries. If left
    # empty, this will default to 5% of the heap size. If the memory usage of
    # all index summaries exceeds this limit, SSTables with low read rates will
    # shrink their index summaries in order to meet this limit.  However, this
    # is a best-effort process. In extreme conditions Scylla may need to use
    # more than this amount of memory.
    # index_summary_capacity_in_mb:

    # How frequently index summaries should be resampled.  This is done
    # periodically to redistribute memory from the fixed-size pool to sstables
    # proportional their recent read rates.  Setting to -1 will disable this
    # process, leaving existing index summaries at their current sampling level.
    # index_summary_resize_interval_in_minutes: 60

    # Whether to, when doing sequential writing, fsync() at intervals in
    # order to force the operating system to flush the dirty
    # buffers. Enable this to avoid sudden dirty buffer flushing from
    # impacting read latencies. Almost always a good idea on SSDs; not
    # necessarily on platters.
    # trickle_fsync: false
    # trickle_fsync_interval_in_kb: 10240

    # 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

    # Internode authentication backend, implementing IInternodeAuthenticator;
    # used to allow/disallow connections from peer nodes.
    # internode_authenticator: org.apache.cassandra.auth.AllowAllInternodeAuthenticator

    # 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 threads for handling requests when the native transport is used.
    # This is similar to rpc_max_threads though the default differs slightly (and
    # there is no native_transport_min_threads, idle threads will always be stopped
    # after 30 seconds).
    # native_transport_max_threads: 128
    #
    # 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

    # The maximum number of concurrent client connections.
    # The default is -1, which means unlimited.
    # native_transport_max_concurrent_connections: -1

    # The maximum number of concurrent client connections per source ip.
    # The default is -1, which means unlimited.
    # native_transport_max_concurrent_connections_per_ip: -1

    # Whether to start the thrift rpc server.
    # start_rpc: true

    # enable or disable keepalive on rpc/native connections
    # rpc_keepalive: true

    # Scylla provides two out-of-the-box options for the RPC Server:
    #
    # sync  -> One thread per thrift connection. For a very large number of clients, memory
    #          will be your limiting factor. On a 64 bit JVM, 180KB is the minimum stack size
    #          per thread, and that will correspond to your use of virtual memory (but physical memory
    #          may be limited depending on use of stack space).
    #
    # hsha  -> Stands for "half synchronous, half asynchronous." All thrift clients are handled
    #          asynchronously using a small number of threads that does not vary with the amount
    #          of thrift clients (and thus scales well to many clients). The rpc requests are still
    #          synchronous (one thread per active request). If hsha is selected then it is essential
    #          that rpc_max_threads is changed from the default value of unlimited.
    #
    # The default is sync because on Windows hsha is about 30% slower.  On Linux,
    # sync/hsha performance is about the same, with hsha of course using less memory.
    #
    # Alternatively,  can provide your own RPC server by providing the fully-qualified class name
    # of an o.a.c.t.TServerFactory that can create an instance of it.
    # rpc_server_type: sync

    # Uncomment rpc_min|max_thread to set request pool size limits.
    #
    # Regardless of your choice of RPC server (see above), the number of maximum requests in the
    # RPC thread pool dictates how many concurrent requests are possible (but if you are using the sync
    # RPC server, it also dictates the number of clients that can be connected at all).
    #
    # The default is unlimited and thus provides no protection against clients overwhelming the server. You are
    # encouraged to set a maximum that makes sense for you in production, but do keep in mind that
    # rpc_max_threads represents the maximum number of client requests this server may execute concurrently.
    #
    # rpc_min_threads: 16
    # rpc_max_threads: 2048

    # uncomment to set socket buffer sizes on rpc connections
    # rpc_send_buff_size_in_bytes:
    # rpc_recv_buff_size_in_bytes:

    # Uncomment to set socket buffer size for internode communication
    # Note that when setting this, the buffer size is limited by net.core.wmem_max
    # and when not setting it it is defined by net.ipv4.tcp_wmem
    # See:
    # /proc/sys/net/core/wmem_max
    # /proc/sys/net/core/rmem_max
    # /proc/sys/net/ipv4/tcp_wmem
    # /proc/sys/net/ipv4/tcp_rmem
    # and: man tcp
    # internode_send_buff_size_in_bytes:
    # internode_recv_buff_size_in_bytes:

    # Frame size for thrift (maximum message length).
    # thrift_framed_transport_size_in_mb: 15

    # 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


    # Number of simultaneous compactions to allow, NOT including
    # validation "compactions" for anti-entropy repair.  Simultaneous
    # compactions can help preserve read performance in a mixed read/write
    # workload, by mitigating the tendency of small sstables to accumulate
    # during a single long running compactions. The default is usually
    # fine and if you experience problems with compaction running too
    # slowly or too fast, you should look at
    # compaction_throughput_mb_per_sec first.
    #
    # concurrent_compactors defaults to the smaller of (number of disks,
    # number of cores), with a minimum of 2 and a maximum of 8.
    # 
    # If your data directories are backed by SSD, you should increase this
    # to the number of cores.
    #concurrent_compactors: 1

    # Throttles compaction to the given total throughput across the entire
    # system. The faster you insert data, the faster you need to compact in
    # order to keep the sstable count down, but in general, setting this to
    # 16 to 32 times the rate you are inserting data is more than sufficient.
    # Setting this to 0 disables throttling. Note that this account for all types
    # of compaction, including validation compaction.
    # compaction_throughput_mb_per_sec: 16

    # 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

    # When compacting, the replacement sstable(s) can be opened before they
    # are completely written, and used in place of the prior sstables for
    # any range that has been written. This helps to smoothly transfer reads 
    # between the sstables, reducing page cache churn and keeping hot rows hot
    # sstable_preemptive_open_interval_in_mb: 50

    # Throttles all streaming file transfer between the datacenters,
    # this setting allows users to throttle inter dc stream throughput in addition
    # to throttling all network stream traffic as configured with
    # stream_throughput_outbound_megabits_per_sec
    # inter_dc_stream_throughput_outbound_megabits_per_sec:

    # 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 operation timeout information exchange between nodes to accurately
    # measure request timeouts.  If disabled, replicas will assume that requests
    # were forwarded to them instantly by the coordinator, which means that
    # under overload conditions we will waste that much extra time processing 
    # already-timed-out requests.
    #
    # Warning: before enabling this property make sure to ntp is installed
    # and the times are synchronized between the nodes.
    # cross_node_timeout: false

    # Enable socket timeout for streaming operation.
    # When a timeout occurs during streaming, streaming is retried from the start
    # of the current file. This _can_ involve re-streaming an important amount of
    # data, so you should avoid setting the value too low.
    # Default value is 0, which never timeout streams.
    # streaming_socket_timeout_in_ms: 0

    # controls how often to perform the more expensive part of host score
    # calculation
    # dynamic_snitch_update_interval_in_ms: 100 

    # controls how often to reset all host scores, allowing a bad host to
    # possibly recover
    # dynamic_snitch_reset_interval_in_ms: 600000

    # if set greater than zero and read_repair_chance is < 1.0, this will allow
    # 'pinning' of replicas to hosts in order to increase cache capacity.
    # The badness threshold will control how much worse the pinned host has to be
    # before the dynamic snitch will prefer other replicas over it.  This is
    # expressed as a double which represents a percentage.  Thus, a value of
    # 0.2 means Scylla would continue to prefer the static snitch values
    # until the pinned host was 20% worse than the fastest.
    # dynamic_snitch_badness_threshold: 0.1

    # request_scheduler -- Set this to a class that implements
    # RequestScheduler, which will schedule incoming client requests
    # according to the specific policy. This is useful for multi-tenancy
    # with a single Scylla cluster.
    # NOTE: This is specifically for requests from the client and does
    # not affect inter node communication.
    # org.apache.cassandra.scheduler.NoScheduler - No scheduling takes place
    # org.apache.cassandra.scheduler.RoundRobinScheduler - Round robin of
    # client requests to a node with a separate queue for each
    # request_scheduler_id. The scheduler is further customized by
    # request_scheduler_options as described below.
    # request_scheduler: org.apache.cassandra.scheduler.NoScheduler

    # Scheduler Options vary based on the type of scheduler
    # NoScheduler - Has no options
    # RoundRobin
    #  - throttle_limit -- The throttle_limit is the number of in-flight
    #                      requests per client.  Requests beyond 
    #                      that limit are queued up until
    #                      running requests can complete.
    #                      The value of 80 here is twice the number of
    #                      concurrent_reads + concurrent_writes.
    #  - default_weight -- default_weight is optional and allows for
    #                      overriding the default which is 1.
    #  - weights -- Weights are optional and will default to 1 or the
    #               overridden default_weight. The weight translates into how
    #               many requests are handled during each turn of the
    #               RoundRobin, based on the scheduler id.
    #
    # request_scheduler_options:
    #    throttle_limit: 80
    #    default_weight: 5
    #    weights:
    #      Keyspace1: 1
    #      Keyspace2: 5

    # request_scheduler_id -- An identifier based on which to perform
    # the request scheduling. Currently the only valid option is keyspace.
    # request_scheduler_id: keyspace

    # Enable or disable inter-node encryption. 
    # You must also generate keys and provide the appropriate key and trust store locations and passwords. 
    # No custom encryption options are currently enabled. The available options are:
    #
    # 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
    #
    # server_encryption_options:
    #    internode_encryption: none
    #    certificate: conf/scylla.crt
    #    keyfile: conf/scylla.key
    #    truststore: <none, use system trust>
    #    require_client_auth: False
    #    priority_string: <none, use default>

    # enable or disable client/server encryption.
    # client_encryption_options:
    #    enabled: false
    #    certificate: conf/scylla.crt
    #    keyfile: conf/scylla.key
    #    truststore: <none, use system trust>
    #    require_client_auth: False
    #    priority_string: <none, use default>

    # 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: false


    # 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
    # By default, Scylla binds all interfaces to the prometheus API
    # It is possible to restrict the listening address to a specific one
    # prometheus_address: 0.0.0.0

    # 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
    api_ui_dir: /opt/scylladb/swagger-ui/dist/
    api_doc_dir: /opt/scylladb/api/api-doc/
