/// <summary>
/// Process study migration candidates retrieved from the <see cref="Model.FilesystemQueue"/> table
/// </summary>
/// <param name="candidateList">The list of candidate studies for deleting.</param>
private void ProcessStudyMigrateCandidates(IList <FilesystemQueue> candidateList)
{
Platform.CheckForNullReference(candidateList, "candidateList");
if (candidateList.Count > 0)
{
Platform.Log(LogLevel.Debug, "Scheduling tier-migration for {0} eligible studies...", candidateList.Count);
}
FilesystemProcessStatistics summaryStats = new FilesystemProcessStatistics("FilesystemTierMigrateInsert");
foreach (FilesystemQueue queueItem in candidateList)
{
if (_bytesToRemove < 0 || CancelPending)
{
Platform.Log(LogLevel.Debug, "Estimated disk space has been reached.");
break;
}
StudyProcessStatistics stats = new StudyProcessStatistics("TierMigrateStudy");
stats.TotalTime.Start();
stats.StudyStorageTime.Start();
// First, get the StudyStorage locations for the study, and calculate the disk usage.
StudyStorageLocation location;
if (!FilesystemMonitor.Instance.GetWritableStudyStorageLocation(queueItem.StudyStorageKey, out location))
{
continue;
}
stats.StudyStorageTime.End();
stats.CalculateDirectorySizeTime.Start();
// Get the disk usage
float studySize = EstimateFolderSizeFromStudyXml(location);
stats.CalculateDirectorySizeTime.End();
stats.DirectorySize = (ulong)studySize;
stats.DbUpdateTime.Start();
using (
IUpdateContext update =
PersistentStoreRegistry.GetDefaultStore().OpenUpdateContext(UpdateContextSyncMode.Flush))
{
ILockStudy lockstudy = update.GetBroker <ILockStudy>();
LockStudyParameters lockParms = new LockStudyParameters
{
StudyStorageKey = location.Key,
QueueStudyStateEnum = QueueStudyStateEnum.MigrationScheduled
};
if (!lockstudy.Execute(lockParms) || !lockParms.Successful)
{
Platform.Log(LogLevel.Warn, "Unable to lock study for inserting Tier Migration. Reason:{0}. Skipping study ({1})",
lockParms.FailureReason, location.StudyInstanceUid);
continue;
}
IInsertWorkQueueFromFilesystemQueue broker = update.GetBroker <IInsertWorkQueueFromFilesystemQueue>();
InsertWorkQueueFromFilesystemQueueParameters insertParms = new InsertWorkQueueFromFilesystemQueueParameters
{
StudyStorageKey = location.GetKey(),
ServerPartitionKey = location.ServerPartitionKey,
ScheduledTime = _scheduledTime,
DeleteFilesystemQueue = true,
WorkQueueTypeEnum = WorkQueueTypeEnum.MigrateStudy,
FilesystemQueueTypeEnum =
FilesystemQueueTypeEnum.TierMigrate
};
Platform.Log(LogLevel.Debug, "Scheduling tier-migration for study {0} from {1} at {2}...",
location.StudyInstanceUid, location.FilesystemTierEnum, _scheduledTime);
WorkQueue insertItem = broker.FindOne(insertParms);
if (insertItem == null)
{
Platform.Log(LogLevel.Error,
"Unexpected problem inserting 'MigrateStudy' record into WorkQueue for Study {0}",
location.StudyInstanceUid);
}
else
{
update.Commit();
_bytesToRemove -= studySize;
_studiesMigrated++;
// spread out the scheduled migration entries based on the size
// assuming that the larger the study the longer it will take to migrate
// The assumed migration speed is arbitarily chosen.
double migrationSpeed = ServiceLockSettings.Default.TierMigrationSpeed * 1024 * 1024; // MB / sec
TimeSpan estMigrateTime = TimeSpan.FromSeconds(studySize / migrationSpeed);
_scheduledTime = _scheduledTime.Add(estMigrateTime);
}
}
stats.DbUpdateTime.End();
stats.TotalTime.End();
summaryStats.AddSubStats(stats);
StatisticsLogger.Log(LogLevel.Debug, stats);
}
summaryStats.CalculateAverage();
StatisticsLogger.Log(LogLevel.Info, false, summaryStats);
}
/// <summary>
/// Process StudyPurge <see cref="FilesystemQueue"/> entries.
/// </summary>
/// <param name="candidateList">The list of candidates for purging</param>
private void ProcessStudyPurgeCandidates(IList <FilesystemQueue> candidateList)
{
if (candidateList.Count > 0)
{
Platform.Log(LogLevel.Debug, "Scheduling purge study for {0} eligible studies...", candidateList.Count);
}
FilesystemProcessStatistics summaryStats = new FilesystemProcessStatistics("FilesystemPurgeInsert");
foreach (FilesystemQueue queueItem in candidateList)
{
if (_bytesToRemove < 0 || CancelPending)
{
break;
}
StudyProcessStatistics stats = new StudyProcessStatistics("PurgeStudy");
stats.TotalTime.Start();
stats.StudyStorageTime.Start();
// First, get the StudyStorage locations for the study, and calculate the disk usage.
StudyStorageLocation location;
if (!FilesystemMonitor.Instance.GetWritableStudyStorageLocation(queueItem.StudyStorageKey, out location))
{
continue;
}
stats.StudyStorageTime.End();
stats.CalculateDirectorySizeTime.Start();
// Get the disk usage
float studySize = EstimateFolderSizeFromStudyXml(location);
stats.CalculateDirectorySizeTime.End();
stats.DirectorySize = (ulong)studySize;
stats.DbUpdateTime.Start();
// Update the DB
using (
IUpdateContext update = PersistentStoreRegistry.GetDefaultStore().OpenUpdateContext(UpdateContextSyncMode.Flush))
{
ILockStudy lockstudy = update.GetBroker <ILockStudy>();
LockStudyParameters lockParms = new LockStudyParameters();
lockParms.StudyStorageKey = location.Key;
lockParms.QueueStudyStateEnum = QueueStudyStateEnum.PurgeScheduled;
if (!lockstudy.Execute(lockParms) || !lockParms.Successful)
{
Platform.Log(LogLevel.Warn, "Unable to lock study for inserting Study Purge, skipping study ({0}",
location.StudyInstanceUid);
continue;
}
IInsertWorkQueueFromFilesystemQueue insertBroker = update.GetBroker <IInsertWorkQueueFromFilesystemQueue>();
InsertWorkQueueFromFilesystemQueueParameters insertParms = new InsertWorkQueueFromFilesystemQueueParameters();
insertParms.StudyStorageKey = location.GetKey();
insertParms.ServerPartitionKey = location.ServerPartitionKey;
insertParms.ScheduledTime = _scheduledTime;
insertParms.DeleteFilesystemQueue = true;
insertParms.WorkQueueTypeEnum = WorkQueueTypeEnum.PurgeStudy;
insertParms.FilesystemQueueTypeEnum = FilesystemQueueTypeEnum.PurgeStudy;
WorkQueue insertItem = insertBroker.FindOne(insertParms);
if (insertItem == null)
{
Platform.Log(LogLevel.Error, "Unexpected problem inserting 'PurgeStudy' record into WorkQueue for Study {0}",
location.StudyInstanceUid);
}
else
{
update.Commit();
_bytesToRemove -= studySize;
_studiesPurged++;
_scheduledTime = _scheduledTime.AddSeconds(2);
}
}
stats.DbUpdateTime.End();
stats.TotalTime.End();
summaryStats.AddSubStats(stats);
StatisticsLogger.Log(LogLevel.Debug, stats);
}
summaryStats.CalculateAverage();
StatisticsLogger.Log(LogLevel.Info, false, summaryStats);
}