dsetool set_core_property

Sets the properties and values in the dse-search.properties resource for the search index.


dsetool set_core_property <keyspace_name>.<table_name>
shard.set.cover.finder=DYNAMIC|STATIC |
s/Users/annette.dennis/github/dse-docs/datastax_enterprise/tools/dsetool/dsetoolSet_core_property.ditahard.shuffling.strategy=HOST|QUERY|HOST_QUERY|RANDOM|SEED |
Syntax conventions Description


Literal keyword.


Not literal.


Variable value. Replace with a valid option or user-defined value.

[ ]

Optional. Square brackets ( [ ] ) surround optional command arguments. Do not type the square brackets.

( )

Group. Parentheses ( ( ) ) identify a group to choose from. Do not type the parentheses.


Or. A vertical bar ( | ) separates alternative elements. Type any one of the elements. Do not type the vertical bar.


Repeatable. An ellipsis ( ... ) indicates that you can repeat the syntax element as often as required.

'<Literal string>'

Single quotation ( ' ) marks must surround literal strings in CQL statements. Use single quotation marks to preserve upper case.

{ <key>:<value> }

Map collection. Braces ( { } ) enclose map collections or key value pairs. A colon separates the key and the value.


Set, list, map, or tuple. Angle brackets ( < > ) enclose data types in a set, list, map, or tuple. Separate the data types with a comma.


End CQL statement. A semicolon ( ; ) terminates all CQL statements.

[ -- ]

Separate the command line options from the command arguments with two hyphens ( -- ). This syntax is useful when arguments might be mistaken for command line options.

' <<schema> ... </schema> >'

Search CQL only: Single quotation marks ( ' ) surround an entire XML schema declaration.


Search CQL only: Identify the entity and literal value to overwrite the XML element in the schema and solrconfig files.


Required. The keyspace and table names of the search index. Keyspace and table names are case-sensitive. Enclose names that contain uppercase in double quotation marks.

For shard.set.cover.finder:

DYNAMIC Use randomization in token range and endpoint selection for load balancing. STATIC is the default for new cores, starting in DSE 6.7. In prior releases, DYNAMIC was the default. If you are upgrading to 6.9 refer to the Upgrade Guide.

STATIC Requires load balanced client. Suitable for 8+ vnodes. The same query on a node uses the same token ranges and endpoints. Creates fewer token filters, and has better performance than DYNAMIC. STATIC is the default, starting in DSE 6.7.

When shard.set.cover.finder=DYNAMIC, values for shard.shuffling.strategy:


Shards are selected based on the host that received the query.


Shards are selected based on the query string.


Shards are selected by host x query.


Suitable only for 8 or fewer vnodes. Different random set of shards are selected with each request (default).


Selects the same shard from one query to another.

When shard.set.cover.finder=STATIC, values for shard.set.cover.finder.inertia:


Increasing the inertia value from the default of 1 may improve performance for clusters with more than 1 vnode and more than 20 nodes. The default is appropriate for most workloads.


To not use randomization to select token ranges and endpoints:

dsetool set_core_property demo.health_data shard.set.cover.finder=STATIC
dsetool reload_core demo.health_data reindex=false

To use default randomization to select token ranges and endpoints:

dsetool set_core_property demo.health_data shard.set.cover.finder=DYNAMIC
dsetool reload_core demo.health_data reindex=false

As shown in the examples, after setting the core property value, be sure to reload the search index. While you can use set_core_property per cluster, reloading the search index must occur per Data Center. In cqlsh, you can use RELOAD SEARCH INDEX. Example:

RELOAD SEARCH INDEX ON demo.health_data;

You do not need to reindex the specified table unless schema changes were made. Refer to Reloading the search index.

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