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  1. Documentation
  2. DOCS-15035

Investigate changes in SERVER-62383: Use durable_timestamp instead of commit_timestamp for set_timestamp

      Downstream Change Summary

      The changes here update the use of commit_timestamp to durable_timestamp with the API set_timestamp. As indicated in the docs (https://source.wiredtiger.com/develop/struct_w_t___c_o_n_n_e_c_t_i_o_n.html#ad082439541b1b95d6aae6c15026fe512), commit_timestamp has been deprecated.

      Until now, commit_timestamp was implicitly converted to durable_timestamp. After WT-8583, any call to set_timestamp with commit_timestamp won't work.

      It would be great to verify in the docs that there is no reference to commit_timestamp when a MongoDB APIs leads to the usage of set_timestamp.

      Description of Linked Ticket

      There are several places in mongodb where set_timestamp is called with the commit_timestamp config. This is deprecated and they should be changed to durable_timestamp.

                  auto commitTSConfigString = "commit_timestamp={:x}"_format(truncTs.asULL());
                  invariantWTOK(conn->set_timestamp(conn, commitTSConfigString.c_str()));
      
              auto oldestTSConfigString =
                  "force=true,oldest_timestamp={0:x},commit_timestamp={0:x}"_format(
                      newOldestTimestamp.asULL());
              invariantWTOK(_conn->set_timestamp(_conn, oldestTSConfigString.c_str()));
      
          if (force) {
              stableTSConfigString =
                  "force=true,oldest_timestamp={0:x},commit_timestamp={0:x},stable_timestamp={0:x}"_format(
                      ts);
              stdx::lock_guard<Latch> lk(_highestDurableTimestampMutex);
              _highestSeenDurableTimestamp = ts;
          } else {
              stableTSConfigString = "stable_timestamp={:x}"_format(ts);
          }
          invariantWTOK(_conn->set_timestamp(_conn, stableTSConfigString.c_str()));
      

            Assignee:
            kenneth.dyer@mongodb.com Kenneth Dyer
            Reporter:
            backlog-server-pm Backlog - Core Eng Program Management Team
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              Created:
              Updated:
              Resolved:
              1 year, 47 weeks, 3 days ago