19.5. FileSystem Command-Line Tools

The GeoMesa FileSystem distribution includes a set of command-line tools for feature management, ingest, export and debugging.

To install the tools, see Setting up the FileSystem Command Line Tools.

Once installed, the tools should be available through the command geomesa-fs:

$ geomesa-fs
INFO  Usage: geomesa-fs [command] [command options]
  Commands:
    ...

Commands that are common to multiple back ends are described in Command-Line Tools. The commands here are FileSystem-specific.

19.5.1. Commands

19.5.1.1. compact

Compact one or more filesystem partitions. This will merge multiple files into fewer, larger files, which may provide better query performance.

Argument	Description
-p, --path *	The filesystem root path used to store data
-f, --feature-name *	The name of the schema
--partitions	Partitions to compact (omit to compact all partitions)
--target-file-size	Target size for data files (e.g. 500MB or 1GB)
--mode	One of local or distributed (to use map/reduce)
--temp-path	Path to a temp directory used for working files

The --temp-path argument may be useful when working with s3 data, as s3 is slow for incremental writes.

19.5.1.2. generate-partition-filters

Calculate filters that exactly match partitions. This can be used to facilitate exports from another system directly into the appropriate partition directory.

Argument	Description
-p, --path *	The filesystem root path used to store data
-f, --feature-name *	The name of the schema
-q, --cql	CQL predicate to determine the partitions to operate on
--partitions	Partitions to operate on, subject to the CQL filter
--no-header	Suppress the column headers in the output
--config	Hadoop configuration properties, in the form key=value

At least one of --cql or --partitions must be specified, to select the partitions being operated on. If both are specified, any explicit partitions that don’t match the CQL predicate will be ignored.

The results will be output in tab-delimited text. The following example uses the GDELT GeoMesa FileSystem Quick Start:

$ ./geomesa-fs generate-partition-filters \
    -p hdfs://localhost:9000/fs           \
    -f gdelt-quickstart                   \
    -q "bbox(geom,0,0,180,90) and dtg during 2020-01-01T00:00:00.000Z/2020-01-03T00:00:00.000Z"
INFO  Generating filters for 2 partitions
Partition Path      Filter
2020/01/01/3        hdfs://localhost:9000/fs/gdelt-quickstart/2020/01/01/3_I        BBOX(geom, 0.0,0.0,180.0,90.0) AND dtg >= '2020-01-01T00:00:00.000Z' AND dtg < '2020-01-02T00:00:00.000Z'
2020/01/02/3        hdfs://localhost:9000/fs/gdelt-quickstart/2020/01/02/3_I        BBOX(geom, 0.0,0.0,180.0,90.0) AND dtg >= '2020-01-02T00:00:00.000Z' AND dtg < '2020-01-03T00:00:00.000Z'

19.5.1.3. get-files

Displays the files for one or more filesystem partitions.

Argument	Description
-p, --path *	The filesystem root path used to store data
-f, --feature-name *	The name of the schema
--partitions	Partitions to list (omit to list all partitions)

19.5.1.4. get-partitions

Displays the partitions for a given filesystem store.

Argument	Description
-p, --path *	The filesystem root path used to store data
-f, --feature-name *	The name of the schema

19.5.1.5. ingest

For an overview of ingestion options, see ingest.

This command ingests files into a GeoMesa FS Datastore. Note that a “datastore” is simply a path in the filesystem. All data and metadata will be stored in the filesystem under the hierarchy of the root path.

Argument	Description
-p, --path *	The filesystem root path used to store data
-e, --encoding	The encoding used for the underlying files. Implementations are provided for parquet and orc.
--partition-scheme	Common partition scheme name (e.g. daily, z2) or path to a file containing a scheme config
--num-reducers	Number of reducers to use (required for distributed ingest)
--leaf-storage	Use leaf storage
--target-file-size	Target size for data files (e.g. 500MB or 1GB)
--temp-path	Path to a temp directory used for working files
--storage-opt	Additional storage options to set as SimpleFeatureType user data, in the form key=value

If the schema does not already exist, then --encoding and --partition-scheme are required, otherwise they may be omitted.

The --partition-scheme argument should be the well-known name of a provided partition scheme, or the name of a file containing a partition scheme. See Partition Schemes for more information.

The --num-reducers should generally be set to half the number of partitions.

The --temp-path argument may be useful when working with s3 data, as s3 is slow to write to.

19.5.1.6. manage-metadata

This command will compact, add and delete metadata entries in a file system storage instance. It has three sub-commands:

• compact - compact multiple metadata files down to a single file

• register - create a new metadata entry for an existing data file

• unregister - remove a metadata entry for an existing data file

• check-consistency - check consistency between the metadata and data files

To invoke the command, use the command name followed by the sub-command, then any arguments. For example:

$ geomesa manage-metadata compact -p /tmp/geomesa ...

Argument	Description
-p, --path *	The filesystem root path used to store data
-f, --feature-name *	The name of the schema

19.5.1.6.1. compact

The compact sub-command will rewrite multiple metadata files as a single file. Note that this does not change the data files; that is accomplished by the top-level compact command, as described above.

19.5.1.6.2. register/unregister

The register and unregister sub-commands will add or delete metadata associated with a particular file. The files must already exist under the appropriate partition path. If new data files are created through some external bulk process, then they must be registered using this command before they are queryable.

Argument	Description
--partition *	The name of the partition to modify
--files *	The names of the files being registered. May be specified multiple times to register multiple files
--count	The number of features in the files being registered. This is not required, but can be used later for estimating query sizes
--bounds	Geographic bounds of the data files being registered, in the form xmin,ymin,xmax,ymax. This is not required, but can be used later for estimating query bounds

19.5.1.6.3. check-consistency

The check-consistency sub-command will check the metadata against the data files. It will find data files that are not referenced in the metadata, and metadata entries that do not correspond to data files.

Argument	Description
--partitions	The name of partitions to check, or none for all partitions
--repair	Incrementally update the metadata to fix any inconsistencies found
--rebuild	Rebuild the entire metadata based on the data files found
--force	Force execution without prompting

Warning

Using both --partitions and --rebuild will cause any data files not in the specified partitions to be removed from the metadata.