Running Multiple PSL Programs in Parallel

[jonathan...@gmail.com]

Is there a way to use the PSL CLI without locking up the database, preventing other programs to also use PSL at the same time? I get this error when trying to use PSL in multiple programs running at the same time:

(Unknown PSL logging level) -- org.h2.jdbc.JdbcSQLException: Database may be already in use: null. Possible solutions: close all other connection(s); use the server mode [90020-192]

Is there a CLI option I can give to the CLI to prevent this issue?

Thank you!

[Eriq Augustine]

Hey Jonathan,

Each running instance of PSL will want a lock on it's database and try to use all the available cores.

To deal with the database lock, you can just tell each instance to use a different database.

Since it looks like you are using H2 as your database engine, you can use the `--h2path` CLI option.

(To see all the CLI options, just use `--help`.)

To deal with each instance of PSL wanting to use all the cores, you can set the `parallel.numthreads` PSL option to whatever you want.

E.g.: `-D parallel.numthreads=2`

-eriq

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