Hi Anton,

Actually, the issue is even more unpleasant.

Official Ignite documentation says that it's possible to configure path where your persistence files will be stored: https://apacheignite.readme.io/docs/distributed-persistent-store However, even if you have set all path options (storage, WAL, WAL archive), Ignite will still store crucial metadata in resolved work directory (java.io.tmpdir by default). Example is binary metadata files, absence of which can make your data unavailable.

I propose to fail Ignite node in case neither IGNITE_HOME nor IgniteConfiguration#igniteWorkDir is set. It's better to let user know about missing configuration options during startup than let OS corrupt storage by cleaning temp dirs.

Thoughts?

Best Regards,
Ivan Rakov

On 12.08.2019 18:10, Anton Kalashnikov wrote:
Hello, Igniters.

Currently, in the case, when work directory wasn't set by user ignite can 
resolve it to tmp directory which leads to some problem - tmp directory can be 
cleared at some unexpected moment by operation system and different types of 
critical data would be lost(ex. binary_meta, persistance data).

Looks like it is not expected behaviour and maybe it is better instead of tmp directory 
use the current working directory("user.dir")? Or any other idea?

A little more details you can find in the ticket - 
https://issues.apache.org/jira/browse/IGNITE-12057
--
Best regards,
Anton Kalashnikov

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