14.7. HBase Index Configuration¶
GeoMesa exposes a variety of configuration options that can be used to customize and optimize a given installation. This section contains HBase-specific options; general options can be found under Index Configuration.
14.7.1. Setting File Compression¶
You can enable HBase file compression when creating a new
SimpleFeatureType by setting the appropriate
user data hints, or through the command line option. Valid compression types
SimpleFeatureType sft = ....; sft.getUserData().put("geomesa.table.compression.type", "snappy");
geomesa-hbase create-schema --compression snappy ...
For more information on how to set schema options, see Setting Schema Options.
14.7.2. Feature Expiration¶
HBase supports setting a per-feature time-to-live. Expiration can be set in the
SimpleFeatureType user data,
using the key
geomesa.feature.expiry. See Setting Schema Options for details on configuring the user data.
Expiration can be set before calling
createSchema, or can be added to an existing schema by calling
updateSchema. However, note that if added through
updateSchema, any existing features will not be expired.
Expiration can be based on either ingest time or a feature attribute. To set expiration based on ingest time,
specify a time-to-live as a duration string, e.g.
24 hours or
180 days. To set expiration based on
a feature attribute, specify the attribute along with a time-to-live in parentheses, e.g.
dtg(24 hours) or
event-time(30 days) (where
Date-type attributes in the schema).
Feature expiration is based on HBase’s time-to-live functionality. See https://hbase.apache.org/book.html#ttl for details.