sbfeedsim

StreamBase Feed Simulator — starts the StreamBase Feed Simulator.

SYNOPSIS

sbfeedsim [OPTIONS...] [feedsim-file.sbfs]

DESCRIPTION

The sbfeedsim command starts the StreamBase Feed Simulator, which connects to a running StreamBase application and submits data to it. Use this tool to test the validity and performance of your application.

As with most StreamBase command-line tools, you can specify the StreamBase Server to communicate with by using -p or -u arguments. In the absence of these arguments, sbfeedsim connects to the server specified in the STREAMBASE_SERVER environment variable. In the absence of this variable, sbfeedsim attempts to connect to the default StreamBase URI, sb://localhost:10000.

If you omit the optional feedsim-file.sbfs argument, sbfeedsim connects to the specified or default server, determines the schema expected by the input stream of the running StreamBase application, and generates default data for each data type in the schema. If the running application has more than one input stream, sbfeedsim determines the expected schema for each stream and generates sample data for all fields in each stream. You can use the –s option to narrow the list of input streams for which sample data is generated.

sbfeedsim can also populate input streams according to a user-specified statistical distribution, or via a data file that contains data you created to test various streaming scenarios. The data file is typically in comma-separated value (CSV) or tab-delimited format. With sbfeedsim, you have control over tuple values and the input rate of generated data.

Starting with StreamBase 3.7, feed simulations run in StreamBase Studio are functionally equivalent to the sbfeedsim command. If you have feed simulation files created and saved with StreamBase 3.5 and earlier, use the sbfeedsim-old command instead, or use the -c option to upgrade those files to the current format.

OPTIONS

–a

Sets the data rate for this feed simulation to run as fast as possible.

-b count

Changes the maximum number of tuples to buffer on each stream to count, when using the default load or a user-specifed distribution. This setting adjusts the enqueue client buffer size for each input stream. The default size is 100 tuples. Specify zero to disable buffering.

-B count

Changes the maximum number of tuples to buffer when using a data file or JDBC data source. The default buffer in these cases is 40,000 tuples.

-c, --convert

Converts a legacy feed simulation file (saved with StreamBase 3.5 and earlier) to the current feed simulator XML format, and prints the result to standard output. You can redirect the converted results to a file, as in the following example:

sbfeedsim -c MyOldFeedsim.sbfs > MyNewFeedsim.sbfs

–F

When using a data file or JDBC data source, completely prefill the tuple buffer before sending the first tuple.

--force

Run this feed simulation even if warnings occur during application compatibility validation.

-h, --help

Displays usage text, then exits.

--legacy

Force an on-the-fly conversion and execution of a feed simulation file created with StreamBase 3.5 or earlier.

--max-time secs

Limit the feed simulation run by time. Generates data appropriate for the schemas of the input ports of the running StreamBase Server, until secs seconds have elapsed.

--max-tuples count

Limit the feed simulation run by number of tuples sent. Generates appropriate data as above up to the number of tuples specified by count.

-p TCP-port

Sets the port number for the StreamBase Server instance to connect with. This is useful when the server is localhost and you only need to specify a non-default port, instead of specifying the full URI with the -u option. The default port is 10000.

Note

The -p option is not supported for StreamBase applications that have authentication enabled.

-q

Does not display tuples (quiet).

–s streamname1,streamname2,...

Specifies a comma-separated list of input stream names in the application running on the connected StreamBase Server. The –s option is only valid when no .sbfs feed simulation file is specified as an argument.

-u uri

Specifies the URI of the StreamBase Server to communicate with. The default is sb://localhost:10000/. The URI can also be set using the STREAMBASE_SERVER environment variable. See the sburi page of the Reference Guide (or see sburi(5) at the UNIX shell prompt) for a discussion of the URI format and its shortcuts.

Note

The sbfeedsim command's -u option accepts a comma-separated list of URIs, where each URI specifies a different StreamBase Server in a high availability cluster. See the Multiple URI Syntax for HA Scenarios page in the Reference Guide for details.

--version

Prints version information and exits.

-x factor

Speeds up all streams by a factor specified by factor. For example, –x 2 runs the feed simulation at twice the default speed.

-z seed

Specify a long value for seed to be used as the random value generator's seed, when automatically generating values for each field in each stream. Without this option, sbfeedsim uses zero as the seed. The values generated by sbfeedsim are the same for a given seed value, which makes tests with the same seed value repeatable. Specify a seed value other than zero to generate a different set of values than the default setting.

FILES

The optional feed simulation file is file.sbfs. If specified, sbfeedsim generates a load using using the specifications in that file.

If you create a data file to contain sample data for testing purposes, it is typically a comma-separated or tab-delimited file.

ENVIRONMENT

STREAMBASE_SERVER

Optional. Contains the URI for a StreamBase Server instance. Use this variable to set a default StreamBase URI for StreamBase commands that take the –u option. If set, commands use the URI in this variable, overriding their built-in default URI, which is sb://localhost:10000. If this variable is set, you must use the –u option to communicate with any server other than the one specified in this variable. See the sburi page in the Reference Guide for more on StreamBase URIs.

STREAMBASE_RETITLE_TERMINALS

Optional. If set to any value, StreamBase command-line utilities assign a terminal window title to match the name of the executable being run. By default terminal titles are not affected.

STREAMBASE_LOG_LEVEL

Optional. Sets the minimum severity of messages that StreamBase writes to syslog or stderr. Default is 0, which gets NOTICE level messages and higher. Reasonable values are -1 (which disables NOTICE messages and shows only WARN, ERROR and FATAL messages), 1 (which adds INFO messages to the standard messages), and 2 (which adds DEBUG messages).

SEE ALSO

sbfeedsim-old
syslog (3)

To define feed simulations in StreamBase Studio (instead of using the sbfeedsim command), see the following topics:

Using the Feed Simulation Editor
Feed Simulations View