Meeting Summaries

• May 5, 1995
  • All transaction share access to one database only. Only one database will be open at a time. If a transaction wants to use another database, the OS infrastructure group will allocate new shared memory structures for it.
• April 12, 1995 (private meeting with the Recovery Manager Group)
  • Recovery Mgr Group agreed to derive from our base log record class.
  • class logrecord will allocate the buffer needed for the entire log record.
  • Two new methods added: log::read_next_logrec(), log::get_next_lsn().
  • Public interface files updated.
• April 7, 1995
  • LSN structure modified: wrap-count, page ID, offset.
  • Recovery group in charge of updating last LSN field in transaction table and updating master log record after writing a checkpoint record.
  • Master log record will be stored in the header page.
  • Heap file group to provide function to allocate pages with contiguous page IDs.
• March 31, 1995
  • A log record has a small fixed portion followed by a variable portion that is defined by the writer of the log record.
  • Refined log manager interface presented.
• March 24, 1995
  • Log manager responsible for updating last LSN field in the transaction table.
  • Preliminary log manager interface presented.