diff options
Diffstat (limited to 'src/mongo/db/s/balancer/balancer.h')
| -rw-r--r-- | src/mongo/db/s/balancer/balancer.h | 11 |
1 files changed, 8 insertions, 3 deletions
diff --git a/src/mongo/db/s/balancer/balancer.h b/src/mongo/db/s/balancer/balancer.h index 4288dfc018b..3afd190820a 100644 --- a/src/mongo/db/s/balancer/balancer.h +++ b/src/mongo/db/s/balancer/balancer.h @@ -30,6 +30,7 @@ #include "mongo/base/disallow_copying.h" #include "mongo/db/s/balancer/balancer_chunk_selection_policy.h" +#include "mongo/db/s/balancer/balancer_random.h" #include "mongo/db/s/balancer/migration_manager.h" #include "mongo/stdx/condition_variable.h" #include "mongo/stdx/mutex.h" @@ -237,11 +238,15 @@ private: // Number of moved chunks in last round int _balancedLastTime; - // Source for cluster statistics + // Source of randomness when metadata needs to be randomized. + BalancerRandomSource _random; + + // Source for cluster statistics. Depends on the source of randomness above so it should be + // created after it and destroyed before it. std::unique_ptr<ClusterStatistics> _clusterStats; - // Balancer policy. Depends on the cluster statistics instance above so it should be created - // after it and destroyed before it. + // Balancer policy. Depends on the cluster statistics instance and source of randomness above so + // it should be created after them and destroyed before them. std::unique_ptr<BalancerChunkSelectionPolicy> _chunkSelectionPolicy; // Migration manager used to schedule and manage migrations |