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  1. WiredTiger
  2. WT-3928

test/format: LSM truncate operations fail

    • 8

      I saw LSM failures running test/format in the develop branch when truncate is configured, for example:

      t: read_row: row 7: found in Berkeley DB, not found in WiredTiger
      t: read_row: row 4: found in Berkeley DB, not found in WiredTiger
      

      WT_SESSION.truncate was just recently merged into format, and I'm pretty suspicious that's the issue. The CONFIG file is the same as WT-3927, which usually hangs, but I'm seeing it fail maybe 20% of the time.

      The CONFIG file:

      ############################################
      #  RUN PARAMETERS
      ############################################
      abort=0
      alter=0
      auto_throttle=1
      backups=0
      bitcnt=3
      bloom=1
      bloom_bit_count=15
      bloom_hash_count=17
      bloom_oldest=0
      cache=300
      cache_minimum=20
      checkpoints=wiredtiger
      checkpoint_log_size=62
      checkpoint_wait=85
      checksum=on
      chunk_size=10
      compaction=0
      compression=snappy
      data_extend=0
      data_source=lsm
      delete_pct=13
      dictionary=0
      direct_io=0
      encryption=rotn-7
      evict_max=3
      file_type=row-store
      firstfit=0
      huffman_key=0
      huffman_value=0
      independent_thread_rng=1
      in_memory=0
      insert_pct=61
      internal_key_truncation=1
      internal_page_max=9
      isolation=random
      key_gap=14
      key_max=256
      key_min=256
      leaf_page_max=9
      leak_memory=0
      logging=1
      logging_archive=0
      logging_compression=lz4-noraw
      logging_file_max=146059
      logging_prealloc=0
      long_running_txn=0
      lsm_worker_threads=4
      merge_max=17
      mmap=1
      modify_pct=19
      ops=100000
      prefix_compression=0
      prefix_compression_min=0
      quiet=1
      read_pct=2
      rebalance=1
      repeat_data_pct=58
      reverse=0
      rows=100000
      runs=1
      salvage=1
      split_pct=90
      statistics=0
      statistics_server=1
      threads=1
      timer=4
      transaction_timestamps=0
      transaction-frequency=49
      truncate=1
      value_max=100
      value_min=32
      verify=1
      wiredtiger_config=
      write_pct=5
      ############################################
      

            Assignee:
            backlog-server-storage-engines Backlog - Storage Engines Team
            Reporter:
            keith.bostic@mongodb.com Keith Bostic (Inactive)
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            Watchers:
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              Created:
              Updated: