Hello,

The maintenance work was completed successfully without incident.

Ingestion into the data lake has recommenced and all HDFS datasets are back-filling now, so no gaps in data are expected as a result of this operation.

Kind regards,
Ben

Hello,

This is a brief reminder that HDFS will be put into safe mode in approximately 1 hour from now.
The YARN scheduler queues will also be set to a STOPPED state for the duration of the switch upgrade.

I'll send out a further message once the work has been completed.

Kind regards,
Ben

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Ben Tullis (he/him) Senior Site Reliability Engineer Wikimedia Foundation