For the purpose of this POC, the minimal schema can be: (wiki_db string, page_id bigint, revision_id bigint, revision_text string)

• study https://iceberg.apache.org/docs/latest/configuration/#write-properties
• experiment writing sample content from wmf.mediawiki_wikitext_history to an iceberg table backed by avro files. The iceberg table will eventually be configured to optimize for:
  1. as few avro files as possible
  2. fast joins with metadata table (see T323642: Spark Streaming Dumps POC: Backfill metadata table)
  3. fast to find content for a given (wiki_db, page_id)
• with results from above, write <some_test_db>.ice_wikitext with everything available in wmf.mediawiki_wikitext_history. This will mostly be used for performance testing right now, so it doesn't need to have more than the minimal schema from above.
• run the job to fill a semi-final table in the wmf db
• document job parameters and explain how the spark job was tuned in detail