The dse.yaml file is the configuration file for setting the delegated snitch, Kerberos authentication, and purging of expired data from the Solr indexes. It is located in the following directories:
For cassandra.yaml configuration, see Node and cluster configuration (cassandra.yaml).
The following property sets which snitch is delegated:
(Default: com.datastax.bdp.snitch.DseSimpleSnitch) The snitch to be delegated by the DseDelegateSnitch. The DseSimpleSnitch places Cassandra, Analytics, and Solr nodes into separate data centers. See DseSimpleSnitch.
For more information, see About snitches in the Cassandra documentation.
The following properties set the QOP (Quality of Protection) and encryption options:
qop: auth A comma-delimited list of Quality of Protection values that clients and servers can use for each connection. The valid values are:
auth: (Default) Authentication only.
auth-int: Authentication plus integrity protection for all transmitted data.
auth-conf: Authentication plus integrity protection and encryption of all transmitted data.
Encryption using auth-conf is separate and completely independent of whether encryption is done using SSL. If both auth-conf and SSL are enabled, the transmitted data is encrypted twice. DataStax recommends choosing one and using it for both encryption and authentication.
The options are:
These settings control the schedulers in charge of querying for and removing expired data.
The options are:
fix_rate_period: (Default: 300 seconds) Schedules how often to check for expired data.
initial_delay: (Default: 20 seconds) Delays the first checks to speed up startup.
Each Solr core must be checked individually. The following settings define which threadpool executes those checks concurrently:
thread_pool_initial_size: (Default: 3)
thread_pool_max_size: (Default: 20)
thread_pool_keep_alive_time: (Default: 60 seconds) How long an idle thread is kept in the active pool.
thread_pool_blocking_queue_size: (Default: 20)
max_solr_search_result_count_per_page: (Default: 200) Sets the maximum Solr search result count per page. Use this setting to throttle the resources consumed by the scheduled checks.
There is one scheduler thread per Solr core. Configure the settings accordingly for best resources usage.
DSE Search provides multi-threaded indexing implementation to improve performance on multi-core machines. All index updates are internally dispatched to a per-core indexing thread pool and executed asynchronously, which allows for greater concurrency and parallelism. However, index requests can return a response before the indexing operation is executed.
(Default: number of available cores times 2) Configures the number of available indexing threads per core. If set to 1, DSE Search returns to the synchronous indexing behavior.