示例#1
0
        public LocalGrainDirectory(Silo silo)
        {
            log = TraceLogger.GetLogger("Orleans.GrainDirectory.LocalGrainDirectory");

            MyAddress = silo.LocalMessageCenter.MyAddress;
            Scheduler = silo.LocalScheduler;
            membershipRingList = new List<SiloAddress>();
            membershipCache = new HashSet<SiloAddress>();

            silo.OrleansConfig.OnConfigChange("Globals/Caching", () =>
            {
                lock (membershipCache)
                {
                    DirectoryCache = GrainDirectoryCacheFactory<List<Tuple<SiloAddress, ActivationId>>>.CreateGrainDirectoryCache(silo.GlobalConfig);
                }
            });
            maintainer = GrainDirectoryCacheFactory<List<Tuple<SiloAddress, ActivationId>>>.CreateGrainDirectoryCacheMaintainer(this, DirectoryCache);

            if (silo.GlobalConfig.SeedNodes.Count > 0)
            {
                seed = silo.GlobalConfig.SeedNodes.Contains(MyAddress.Endpoint) ? MyAddress : SiloAddress.New(silo.GlobalConfig.SeedNodes[0], 0);
            }

            stopPreparationResolver = new TaskCompletionSource<bool>();
            DirectoryPartition = new GrainDirectoryPartition();
            HandoffManager = new GrainDirectoryHandoffManager(this, silo.GlobalConfig);

            RemGrainDirectory = new RemoteGrainDirectory(this, Constants.DirectoryServiceId);
            CacheValidator = new RemoteGrainDirectory(this, Constants.DirectoryCacheValidatorId);

            // add myself to the list of members
            AddServer(MyAddress);

            Func<SiloAddress, string> siloAddressPrint = (SiloAddress addr) => 
                String.Format("{0}/{1:X}", addr.ToLongString(), addr.GetConsistentHashCode());
            
            localLookups = CounterStatistic.FindOrCreate(StatisticNames.DIRECTORY_LOOKUPS_LOCAL_ISSUED);
            localSuccesses = CounterStatistic.FindOrCreate(StatisticNames.DIRECTORY_LOOKUPS_LOCAL_SUCCESSES);
            fullLookups = CounterStatistic.FindOrCreate(StatisticNames.DIRECTORY_LOOKUPS_FULL_ISSUED);

            RemoteLookupsSent = CounterStatistic.FindOrCreate(StatisticNames.DIRECTORY_LOOKUPS_REMOTE_SENT);
            RemoteLookupsReceived = CounterStatistic.FindOrCreate(StatisticNames.DIRECTORY_LOOKUPS_REMOTE_RECEIVED);

            LocalDirectoryLookups = CounterStatistic.FindOrCreate(StatisticNames.DIRECTORY_LOOKUPS_LOCALDIRECTORY_ISSUED);
            LocalDirectorySuccesses = CounterStatistic.FindOrCreate(StatisticNames.DIRECTORY_LOOKUPS_LOCALDIRECTORY_SUCCESSES);

            cacheLookups = CounterStatistic.FindOrCreate(StatisticNames.DIRECTORY_LOOKUPS_CACHE_ISSUED);
            cacheSuccesses = CounterStatistic.FindOrCreate(StatisticNames.DIRECTORY_LOOKUPS_CACHE_SUCCESSES);
            StringValueStatistic.FindOrCreate(StatisticNames.DIRECTORY_LOOKUPS_CACHE_HITRATIO, () =>
                {
                    long delta1, delta2;
                    long curr1 = cacheSuccesses.GetCurrentValueAndDelta(out delta1);
                    long curr2 = cacheLookups.GetCurrentValueAndDelta(out delta2);
                    return String.Format("{0}, Delta={1}", 
                        (curr2 != 0 ? (float)curr1 / (float)curr2 : 0)
                        ,(delta2 !=0 ? (float)delta1 / (float)delta2 : 0));
                });

            CacheValidationsSent = CounterStatistic.FindOrCreate(StatisticNames.DIRECTORY_VALIDATIONS_CACHE_SENT);
            CacheValidationsReceived = CounterStatistic.FindOrCreate(StatisticNames.DIRECTORY_VALIDATIONS_CACHE_RECEIVED);

            registrationsIssued = CounterStatistic.FindOrCreate(StatisticNames.DIRECTORY_REGISTRATIONS_ISSUED);
            RegistrationsLocal = CounterStatistic.FindOrCreate(StatisticNames.DIRECTORY_REGISTRATIONS_LOCAL);
            RegistrationsRemoteSent = CounterStatistic.FindOrCreate(StatisticNames.DIRECTORY_REGISTRATIONS_REMOTE_SENT);
            RegistrationsRemoteReceived = CounterStatistic.FindOrCreate(StatisticNames.DIRECTORY_REGISTRATIONS_REMOTE_RECEIVED);
            registrationsSingleActIssued = CounterStatistic.FindOrCreate(StatisticNames.DIRECTORY_REGISTRATIONS_SINGLE_ACT_ISSUED);
            RegistrationsSingleActLocal = CounterStatistic.FindOrCreate(StatisticNames.DIRECTORY_REGISTRATIONS_SINGLE_ACT_LOCAL);
            RegistrationsSingleActRemoteSent = CounterStatistic.FindOrCreate(StatisticNames.DIRECTORY_REGISTRATIONS_SINGLE_ACT_REMOTE_SENT);
            RegistrationsSingleActRemoteReceived = CounterStatistic.FindOrCreate(StatisticNames.DIRECTORY_REGISTRATIONS_SINGLE_ACT_REMOTE_RECEIVED);
            unregistrationsIssued = CounterStatistic.FindOrCreate(StatisticNames.DIRECTORY_UNREGISTRATIONS_ISSUED);
            UnregistrationsLocal = CounterStatistic.FindOrCreate(StatisticNames.DIRECTORY_UNREGISTRATIONS_LOCAL);
            UnregistrationsRemoteSent = CounterStatistic.FindOrCreate(StatisticNames.DIRECTORY_UNREGISTRATIONS_REMOTE_SENT);
            UnregistrationsRemoteReceived = CounterStatistic.FindOrCreate(StatisticNames.DIRECTORY_UNREGISTRATIONS_REMOTE_RECEIVED);
            unregistrationsManyIssued = CounterStatistic.FindOrCreate(StatisticNames.DIRECTORY_UNREGISTRATIONS_MANY_ISSUED);
            UnregistrationsManyRemoteSent = CounterStatistic.FindOrCreate(StatisticNames.DIRECTORY_UNREGISTRATIONS_MANY_REMOTE_SENT);
            UnregistrationsManyRemoteReceived = CounterStatistic.FindOrCreate(StatisticNames.DIRECTORY_UNREGISTRATIONS_MANY_REMOTE_RECEIVED);

            directoryPartitionCount = IntValueStatistic.FindOrCreate(StatisticNames.DIRECTORY_PARTITION_SIZE, () => DirectoryPartition.Count);
            IntValueStatistic.FindOrCreate(StatisticNames.DIRECTORY_RING_MYPORTION_RINGDISTANCE, () => RingDistanceToSuccessor());
            FloatValueStatistic.FindOrCreate(StatisticNames.DIRECTORY_RING_MYPORTION_RINGPERCENTAGE, () => (((float)RingDistanceToSuccessor()) / ((float)(int.MaxValue * 2L))) * 100);
            FloatValueStatistic.FindOrCreate(StatisticNames.DIRECTORY_RING_MYPORTION_AVERAGERINGPERCENTAGE, () => membershipRingList.Count == 0 ? 0 : ((float)100 / (float)membershipRingList.Count));
            IntValueStatistic.FindOrCreate(StatisticNames.DIRECTORY_RING_RINGSIZE, () => membershipRingList.Count);
            StringValueStatistic.FindOrCreate(StatisticNames.DIRECTORY_RING, () =>
                {
                    lock (membershipCache)
                    {
                        return Utils.EnumerableToString(membershipRingList, siloAddressPrint);
                    }
                });
            StringValueStatistic.FindOrCreate(StatisticNames.DIRECTORY_RING_PREDECESSORS, () => Utils.EnumerableToString(FindPredecessors(MyAddress, 1), siloAddressPrint));
            StringValueStatistic.FindOrCreate(StatisticNames.DIRECTORY_RING_SUCCESSORS, () => Utils.EnumerableToString(FindSuccessors(MyAddress, 1), siloAddressPrint));
        }
示例#2
0
        public LocalGrainDirectory(Silo silo)
        {
            log = TraceLogger.GetLogger("Orleans.GrainDirectory.LocalGrainDirectory");

            MyAddress          = silo.LocalMessageCenter.MyAddress;
            Scheduler          = silo.LocalScheduler;
            membershipRingList = new List <SiloAddress>();
            membershipCache    = new HashSet <SiloAddress>();

            silo.OrleansConfig.OnConfigChange("Globals/Caching", () =>
            {
                lock (membershipCache)
                {
                    DirectoryCache = GrainDirectoryCacheFactory <IReadOnlyList <Tuple <SiloAddress, ActivationId> > > .CreateGrainDirectoryCache(silo.GlobalConfig);
                }
            });
            maintainer = GrainDirectoryCacheFactory <IReadOnlyList <Tuple <SiloAddress, ActivationId> > > .CreateGrainDirectoryCacheMaintainer(this, DirectoryCache);

            if (silo.GlobalConfig.SeedNodes.Count > 0)
            {
                seed = silo.GlobalConfig.SeedNodes.Contains(MyAddress.Endpoint) ? MyAddress : SiloAddress.New(silo.GlobalConfig.SeedNodes[0], 0);
            }

            stopPreparationResolver = new TaskCompletionSource <bool>();
            DirectoryPartition      = new GrainDirectoryPartition();
            HandoffManager          = new GrainDirectoryHandoffManager(this, silo.GlobalConfig);

            RemGrainDirectory = new RemoteGrainDirectory(this, Constants.DirectoryServiceId);
            CacheValidator    = new RemoteGrainDirectory(this, Constants.DirectoryCacheValidatorId);

            // add myself to the list of members
            AddServer(MyAddress);

            Func <SiloAddress, string> siloAddressPrint = (SiloAddress addr) =>
                                                          String.Format("{0}/{1:X}", addr.ToLongString(), addr.GetConsistentHashCode());

            localLookups   = CounterStatistic.FindOrCreate(StatisticNames.DIRECTORY_LOOKUPS_LOCAL_ISSUED);
            localSuccesses = CounterStatistic.FindOrCreate(StatisticNames.DIRECTORY_LOOKUPS_LOCAL_SUCCESSES);
            fullLookups    = CounterStatistic.FindOrCreate(StatisticNames.DIRECTORY_LOOKUPS_FULL_ISSUED);

            RemoteLookupsSent     = CounterStatistic.FindOrCreate(StatisticNames.DIRECTORY_LOOKUPS_REMOTE_SENT);
            RemoteLookupsReceived = CounterStatistic.FindOrCreate(StatisticNames.DIRECTORY_LOOKUPS_REMOTE_RECEIVED);

            LocalDirectoryLookups   = CounterStatistic.FindOrCreate(StatisticNames.DIRECTORY_LOOKUPS_LOCALDIRECTORY_ISSUED);
            LocalDirectorySuccesses = CounterStatistic.FindOrCreate(StatisticNames.DIRECTORY_LOOKUPS_LOCALDIRECTORY_SUCCESSES);

            cacheLookups   = CounterStatistic.FindOrCreate(StatisticNames.DIRECTORY_LOOKUPS_CACHE_ISSUED);
            cacheSuccesses = CounterStatistic.FindOrCreate(StatisticNames.DIRECTORY_LOOKUPS_CACHE_SUCCESSES);
            StringValueStatistic.FindOrCreate(StatisticNames.DIRECTORY_LOOKUPS_CACHE_HITRATIO, () =>
            {
                long delta1, delta2;
                long curr1 = cacheSuccesses.GetCurrentValueAndDelta(out delta1);
                long curr2 = cacheLookups.GetCurrentValueAndDelta(out delta2);
                return(String.Format("{0}, Delta={1}",
                                     (curr2 != 0 ? (float)curr1 / (float)curr2 : 0)
                                     , (delta2 != 0 ? (float)delta1 / (float)delta2 : 0)));
            });

            CacheValidationsSent     = CounterStatistic.FindOrCreate(StatisticNames.DIRECTORY_VALIDATIONS_CACHE_SENT);
            CacheValidationsReceived = CounterStatistic.FindOrCreate(StatisticNames.DIRECTORY_VALIDATIONS_CACHE_RECEIVED);

            registrationsIssued                  = CounterStatistic.FindOrCreate(StatisticNames.DIRECTORY_REGISTRATIONS_ISSUED);
            RegistrationsLocal                   = CounterStatistic.FindOrCreate(StatisticNames.DIRECTORY_REGISTRATIONS_LOCAL);
            RegistrationsRemoteSent              = CounterStatistic.FindOrCreate(StatisticNames.DIRECTORY_REGISTRATIONS_REMOTE_SENT);
            RegistrationsRemoteReceived          = CounterStatistic.FindOrCreate(StatisticNames.DIRECTORY_REGISTRATIONS_REMOTE_RECEIVED);
            registrationsSingleActIssued         = CounterStatistic.FindOrCreate(StatisticNames.DIRECTORY_REGISTRATIONS_SINGLE_ACT_ISSUED);
            RegistrationsSingleActLocal          = CounterStatistic.FindOrCreate(StatisticNames.DIRECTORY_REGISTRATIONS_SINGLE_ACT_LOCAL);
            RegistrationsSingleActRemoteSent     = CounterStatistic.FindOrCreate(StatisticNames.DIRECTORY_REGISTRATIONS_SINGLE_ACT_REMOTE_SENT);
            RegistrationsSingleActRemoteReceived = CounterStatistic.FindOrCreate(StatisticNames.DIRECTORY_REGISTRATIONS_SINGLE_ACT_REMOTE_RECEIVED);
            unregistrationsIssued                = CounterStatistic.FindOrCreate(StatisticNames.DIRECTORY_UNREGISTRATIONS_ISSUED);
            UnregistrationsLocal                 = CounterStatistic.FindOrCreate(StatisticNames.DIRECTORY_UNREGISTRATIONS_LOCAL);
            UnregistrationsRemoteSent            = CounterStatistic.FindOrCreate(StatisticNames.DIRECTORY_UNREGISTRATIONS_REMOTE_SENT);
            UnregistrationsRemoteReceived        = CounterStatistic.FindOrCreate(StatisticNames.DIRECTORY_UNREGISTRATIONS_REMOTE_RECEIVED);
            unregistrationsManyIssued            = CounterStatistic.FindOrCreate(StatisticNames.DIRECTORY_UNREGISTRATIONS_MANY_ISSUED);
            UnregistrationsManyRemoteSent        = CounterStatistic.FindOrCreate(StatisticNames.DIRECTORY_UNREGISTRATIONS_MANY_REMOTE_SENT);
            UnregistrationsManyRemoteReceived    = CounterStatistic.FindOrCreate(StatisticNames.DIRECTORY_UNREGISTRATIONS_MANY_REMOTE_RECEIVED);

            directoryPartitionCount = IntValueStatistic.FindOrCreate(StatisticNames.DIRECTORY_PARTITION_SIZE, () => DirectoryPartition.Count);
            IntValueStatistic.FindOrCreate(StatisticNames.DIRECTORY_RING_MYPORTION_RINGDISTANCE, () => RingDistanceToSuccessor());
            FloatValueStatistic.FindOrCreate(StatisticNames.DIRECTORY_RING_MYPORTION_RINGPERCENTAGE, () => (((float)RingDistanceToSuccessor()) / ((float)(int.MaxValue * 2L))) * 100);
            FloatValueStatistic.FindOrCreate(StatisticNames.DIRECTORY_RING_MYPORTION_AVERAGERINGPERCENTAGE, () => membershipRingList.Count == 0 ? 0 : ((float)100 / (float)membershipRingList.Count));
            IntValueStatistic.FindOrCreate(StatisticNames.DIRECTORY_RING_RINGSIZE, () => membershipRingList.Count);
            StringValueStatistic.FindOrCreate(StatisticNames.DIRECTORY_RING, () =>
            {
                lock (membershipCache)
                {
                    return(Utils.EnumerableToString(membershipRingList, siloAddressPrint));
                }
            });
            StringValueStatistic.FindOrCreate(StatisticNames.DIRECTORY_RING_PREDECESSORS, () => Utils.EnumerableToString(FindPredecessors(MyAddress, 1), siloAddressPrint));
            StringValueStatistic.FindOrCreate(StatisticNames.DIRECTORY_RING_SUCCESSORS, () => Utils.EnumerableToString(FindSuccessors(MyAddress, 1), siloAddressPrint));
        }
示例#3
0
        public LocalGrainDirectory(
            IServiceProvider serviceProvider,
            ILocalSiloDetails siloDetails,
            ISiloStatusOracle siloStatusOracle,
            IInternalGrainFactory grainFactory,
            Factory <GrainDirectoryPartition> grainDirectoryPartitionFactory,
            IOptions <DevelopmentClusterMembershipOptions> developmentClusterMembershipOptions,
            IOptions <GrainDirectoryOptions> grainDirectoryOptions,
            ILoggerFactory loggerFactory)
        {
            this.log = loggerFactory.CreateLogger <LocalGrainDirectory>();

            var clusterId = siloDetails.ClusterId;

            MyAddress = siloDetails.SiloAddress;

            this.siloStatusOracle = siloStatusOracle;
            this.grainFactory     = grainFactory;
            ClusterId             = clusterId;

            DirectoryCache = GrainDirectoryCacheFactory.CreateGrainDirectoryCache(serviceProvider, grainDirectoryOptions.Value);
            maintainer     =
                GrainDirectoryCacheFactory.CreateGrainDirectoryCacheMaintainer(
                    this,
                    this.DirectoryCache,
                    grainFactory,
                    loggerFactory);

            var primarySiloEndPoint = developmentClusterMembershipOptions.Value.PrimarySiloEndpoint;

            if (primarySiloEndPoint != null)
            {
                this.seed = this.MyAddress.Endpoint.Equals(primarySiloEndPoint) ? this.MyAddress : SiloAddress.New(primarySiloEndPoint, 0);
            }

            DirectoryPartition = grainDirectoryPartitionFactory();
            HandoffManager     = new GrainDirectoryHandoffManager(this, siloStatusOracle, grainFactory, grainDirectoryPartitionFactory, loggerFactory);

            RemoteGrainDirectory = new RemoteGrainDirectory(this, Constants.DirectoryServiceType, loggerFactory);
            CacheValidator       = new RemoteGrainDirectory(this, Constants.DirectoryCacheValidatorType, loggerFactory);

            // add myself to the list of members
            AddServer(MyAddress);

            Func <SiloAddress, string> siloAddressPrint = (SiloAddress addr) =>
                                                          String.Format("{0}/{1:X}", addr.ToLongString(), addr.GetConsistentHashCode());

            localLookups   = CounterStatistic.FindOrCreate(StatisticNames.DIRECTORY_LOOKUPS_LOCAL_ISSUED);
            localSuccesses = CounterStatistic.FindOrCreate(StatisticNames.DIRECTORY_LOOKUPS_LOCAL_SUCCESSES);
            fullLookups    = CounterStatistic.FindOrCreate(StatisticNames.DIRECTORY_LOOKUPS_FULL_ISSUED);

            RemoteLookupsSent     = CounterStatistic.FindOrCreate(StatisticNames.DIRECTORY_LOOKUPS_REMOTE_SENT);
            RemoteLookupsReceived = CounterStatistic.FindOrCreate(StatisticNames.DIRECTORY_LOOKUPS_REMOTE_RECEIVED);

            LocalDirectoryLookups   = CounterStatistic.FindOrCreate(StatisticNames.DIRECTORY_LOOKUPS_LOCALDIRECTORY_ISSUED);
            LocalDirectorySuccesses = CounterStatistic.FindOrCreate(StatisticNames.DIRECTORY_LOOKUPS_LOCALDIRECTORY_SUCCESSES);

            cacheLookups   = CounterStatistic.FindOrCreate(StatisticNames.DIRECTORY_LOOKUPS_CACHE_ISSUED);
            cacheSuccesses = CounterStatistic.FindOrCreate(StatisticNames.DIRECTORY_LOOKUPS_CACHE_SUCCESSES);
            StringValueStatistic.FindOrCreate(StatisticNames.DIRECTORY_LOOKUPS_CACHE_HITRATIO, () =>
            {
                long delta1, delta2;
                long curr1 = cacheSuccesses.GetCurrentValueAndDelta(out delta1);
                long curr2 = cacheLookups.GetCurrentValueAndDelta(out delta2);
                return(String.Format("{0}, Delta={1}",
                                     (curr2 != 0 ? (float)curr1 / (float)curr2 : 0)
                                     , (delta2 != 0 ? (float)delta1 / (float)delta2 : 0)));
            });

            CacheValidationsSent     = CounterStatistic.FindOrCreate(StatisticNames.DIRECTORY_VALIDATIONS_CACHE_SENT);
            CacheValidationsReceived = CounterStatistic.FindOrCreate(StatisticNames.DIRECTORY_VALIDATIONS_CACHE_RECEIVED);

            registrationsIssued                  = CounterStatistic.FindOrCreate(StatisticNames.DIRECTORY_REGISTRATIONS_ISSUED);
            RegistrationsLocal                   = CounterStatistic.FindOrCreate(StatisticNames.DIRECTORY_REGISTRATIONS_LOCAL);
            RegistrationsRemoteSent              = CounterStatistic.FindOrCreate(StatisticNames.DIRECTORY_REGISTRATIONS_REMOTE_SENT);
            RegistrationsRemoteReceived          = CounterStatistic.FindOrCreate(StatisticNames.DIRECTORY_REGISTRATIONS_REMOTE_RECEIVED);
            registrationsSingleActIssued         = CounterStatistic.FindOrCreate(StatisticNames.DIRECTORY_REGISTRATIONS_SINGLE_ACT_ISSUED);
            RegistrationsSingleActLocal          = CounterStatistic.FindOrCreate(StatisticNames.DIRECTORY_REGISTRATIONS_SINGLE_ACT_LOCAL);
            RegistrationsSingleActRemoteSent     = CounterStatistic.FindOrCreate(StatisticNames.DIRECTORY_REGISTRATIONS_SINGLE_ACT_REMOTE_SENT);
            RegistrationsSingleActRemoteReceived = CounterStatistic.FindOrCreate(StatisticNames.DIRECTORY_REGISTRATIONS_SINGLE_ACT_REMOTE_RECEIVED);
            unregistrationsIssued                = CounterStatistic.FindOrCreate(StatisticNames.DIRECTORY_UNREGISTRATIONS_ISSUED);
            UnregistrationsLocal                 = CounterStatistic.FindOrCreate(StatisticNames.DIRECTORY_UNREGISTRATIONS_LOCAL);
            UnregistrationsRemoteSent            = CounterStatistic.FindOrCreate(StatisticNames.DIRECTORY_UNREGISTRATIONS_REMOTE_SENT);
            UnregistrationsRemoteReceived        = CounterStatistic.FindOrCreate(StatisticNames.DIRECTORY_UNREGISTRATIONS_REMOTE_RECEIVED);
            unregistrationsManyIssued            = CounterStatistic.FindOrCreate(StatisticNames.DIRECTORY_UNREGISTRATIONS_MANY_ISSUED);
            UnregistrationsManyRemoteSent        = CounterStatistic.FindOrCreate(StatisticNames.DIRECTORY_UNREGISTRATIONS_MANY_REMOTE_SENT);
            UnregistrationsManyRemoteReceived    = CounterStatistic.FindOrCreate(StatisticNames.DIRECTORY_UNREGISTRATIONS_MANY_REMOTE_RECEIVED);

            directoryPartitionCount = IntValueStatistic.FindOrCreate(StatisticNames.DIRECTORY_PARTITION_SIZE, () => DirectoryPartition.Count);
            IntValueStatistic.FindOrCreate(StatisticNames.DIRECTORY_RING_MYPORTION_RINGDISTANCE, () => RingDistanceToSuccessor());
            FloatValueStatistic.FindOrCreate(StatisticNames.DIRECTORY_RING_MYPORTION_RINGPERCENTAGE, () => (((float)this.RingDistanceToSuccessor()) / ((float)(int.MaxValue * 2L))) * 100);
            FloatValueStatistic.FindOrCreate(StatisticNames.DIRECTORY_RING_MYPORTION_AVERAGERINGPERCENTAGE, () =>
            {
                var ring = this.directoryMembership.MembershipRingList;
                return(ring.Count == 0 ? 0 : ((float)100 / (float)ring.Count));
            });
            IntValueStatistic.FindOrCreate(StatisticNames.DIRECTORY_RING_RINGSIZE, () => this.directoryMembership.MembershipRingList.Count);
            StringValueStatistic.FindOrCreate(StatisticNames.DIRECTORY_RING, () =>
            {
                var ring = this.directoryMembership.MembershipRingList;
                return(Utils.EnumerableToString(ring, siloAddressPrint));
            });
            StringValueStatistic.FindOrCreate(StatisticNames.DIRECTORY_RING_PREDECESSORS, () => Utils.EnumerableToString(this.FindPredecessors(this.MyAddress, 1), siloAddressPrint));
            StringValueStatistic.FindOrCreate(StatisticNames.DIRECTORY_RING_SUCCESSORS, () => Utils.EnumerableToString(this.FindSuccessors(this.MyAddress, 1), siloAddressPrint));
        }