Document how to change log location

Description

can we please add this info to sw docs .

ref - https://support.h2o.ai/helpdesk/tickets/91640
from

1 2 3 4 5 6 7 8 9 10 11 12 13 We offload logs into temporary space of hadoop job defined by `spark.yarn.app.container.log.dir`. Furthermore, You can control log level via following Sparkling water properties: - `spark.ext.h2o.node.log.level` (executor log level) - `spark.ext.h2o.client.log.level` (client log level) So you can setup these properties to `ERROR` level to avoid printing too many messages into logs. Furthermore, You need to control log level of spark as well via `$SPARK_HOME/conf/log4j.properties` regaring log4j.properties, for example - # Set everything to be logged to the console log4j.rootCategory=ERROR, console

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Jakub Hava

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Nidhi Mehta

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