Make a helper function to compute atClusterTime for a set of shards

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    • Type: Task
    • Resolution: Duplicate
    • Priority: Major - P3
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    • Affects Version/s: None
    • Component/s: Sharding
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    • Sharding 2018-04-09
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    • 3
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      This logic is implemented in several places of cluster_find and cluster_aggregate

          if (isSnapshotRead) {
        std::set<ShardId> shardIds = {shardId};
        atClusterTime = computeAtClusterTime(opCtx, shardIds);
        bool isSameShardIds = verifyTargetedShardsAtClusterTime(opCtx, shardIds, atClusterTime);
        if (!isSameShardIds) {  // use the current clusterTime if chunks moved
            atClusterTime = LogicalClock::get(opCtx)->getClusterTime();
        }
    }

      Build a helper to keep it in one place.

            Assignee:
            Misha Tyulenev (Inactive)
            Reporter:
            Misha Tyulenev (Inactive)
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              Created:
              Updated:
              Resolved: