Various fixes in the stats wf #430

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antonis.lempesis wants to merge 10 commits from antonis.lempesis/dnet-hadoop:beta into beta
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antonis.lempesis added 10 commits 2024-04-24 11:18:08 +02:00
49af2e5740 Miscellaneous updates to the copying operation to Impala Cluster:
- Update the algorithm for creating views that depend on other views; overcome some bash-instabilities.
- Upon any error, fail the whole process, not just the current DB-creation, as those errors usually indicate a bug in the initial DB-creation, that should be fixed immediately.
- Enhance parallel-copy of large files by "hadoop distcp" command.
- Reduce the "invalidate metadata" commands to just the current DB's tables, in order to eliminate the general overhead on Impala.
- Show the number of tables and views in the logs.
- Fix some log-messages.
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Reference: D-Net/dnet-hadoop#430
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