public ServerFilesystemInfo(ServerFilesystemInfo copy)
{
_filesystem = copy.Filesystem;
_online = copy.Online;
_freeBytes = copy.FreeBytes;
_totalBytes = copy.TotalBytes;
}
/// <summary>
/// Gets the first filesystem in lower tier for storage purpose.
/// </summary>
/// <param name="filesystem">The current filesystem</param>
/// <returns></returns>
public ServerFilesystemInfo GetLowerTierFilesystemForStorage(ServerFilesystemInfo filesystem)
{
lock (SyncLock)
{
List <FilesystemTierEnum> lowerTiers = FindLowerTierFilesystems(filesystem);
if (lowerTiers == null || lowerTiers.Count == 0)
{
return(null);
}
List <ServerFilesystemInfo> list = new List <ServerFilesystemInfo>();
foreach (FilesystemTierEnum tier in lowerTiers)
{
list.AddRange(_tierInfo[tier]);
}
CollectionUtils.Remove(list, fs => !fs.Writeable);
list = CollectionUtils.Sort(list, FilesystemSorter.SortByFreeSpace);
ServerFilesystemInfo lowtierFilesystem = CollectionUtils.FirstElement(list);
if (lowtierFilesystem == null)
{
return(null);
}
return(new ServerFilesystemInfo(lowtierFilesystem));//return a copy
}
}
/// <summary>
/// Checks for a storage location for the study in the database, and creates a new location
/// in the database if it doesn't exist.
/// </summary>
/// <param name="partition">The partition where the study is being sent to</param>
/// <param name="created"></param>
/// <param name="studyDate"></param>
/// <param name="studyInstanceUid"></param>
/// <param name="syntax"></param>
/// <param name="updateContext">The update context to create the study on</param>
/// <returns>A <see cref="StudyStorageLocation"/> instance.</returns>
public StudyStorageLocation GetOrCreateWritableStudyStorageLocation(string studyInstanceUid, string studyDate, TransferSyntax syntax, IUpdateContext updateContext, ServerPartition partition, out bool created)
{
created = false;
StudyStorageLocation location;
try
{
GetWritableStudyStorageLocation(partition.Key, studyInstanceUid, StudyRestore.True,
StudyCache.True, out location);
return(location);
}
catch (StudyNotFoundException)
{
}
FilesystemSelector selector = new FilesystemSelector(Instance);
ServerFilesystemInfo filesystem = selector.SelectFilesystem();
if (filesystem == null)
{
throw new NoWritableFilesystemException();
}
IInsertStudyStorage locInsert = updateContext.GetBroker <IInsertStudyStorage>();
InsertStudyStorageParameters insertParms = new InsertStudyStorageParameters
{
ServerPartitionKey = partition.GetKey(),
StudyInstanceUid = studyInstanceUid,
Folder =
ResolveStorageFolder(partition.Key, studyInstanceUid, studyDate,
updateContext, false
/* set to false for optimization because we are sure it's not in the system */),
FilesystemKey = filesystem.Filesystem.GetKey(),
QueueStudyStateEnum = QueueStudyStateEnum.Idle
};
if (syntax.LosslessCompressed)
{
insertParms.TransferSyntaxUid = syntax.UidString;
insertParms.StudyStatusEnum = StudyStatusEnum.OnlineLossless;
}
else if (syntax.LossyCompressed)
{
insertParms.TransferSyntaxUid = syntax.UidString;
insertParms.StudyStatusEnum = StudyStatusEnum.OnlineLossy;
}
else
{
insertParms.TransferSyntaxUid = syntax.UidString;
insertParms.StudyStatusEnum = StudyStatusEnum.Online;
}
location = locInsert.FindOne(insertParms);
created = true;
return(location);
}
/// <summary>
/// Find lower tier filesystems.
/// </summary>
/// <param name="filesystem"></param>
/// <returns></returns>
private List <FilesystemTierEnum> FindLowerTierFilesystems(ServerFilesystemInfo filesystem)
{
List <FilesystemTierEnum> lowerTiers = new List <FilesystemTierEnum>();
foreach (FilesystemTierEnum tier in _tierInfo.Keys)
{
if (tier.Enum > filesystem.Filesystem.FilesystemTierEnum.Enum)
{
lowerTiers.Add(tier);
}
}
return(lowerTiers);
}
public static int SortByFreeSpace(ServerFilesystemInfo fs1, ServerFilesystemInfo fs2)
{
Platform.CheckForNullReference(fs1, "fs1");
Platform.CheckForNullReference(fs2, "fs2");
Platform.CheckForNullReference(fs1.Filesystem, "fs1.Filesystem");
Platform.CheckForNullReference(fs2.Filesystem, "fs2.Filesystem");
if (fs1 == fs2)
return 0;
if (fs1.Filesystem.FilesystemTierEnum.Enum.Equals(fs2.Filesystem.FilesystemTierEnum.Enum))
{
// descending order on available size.. smaller margin means less available space
return fs2.HighwaterMarkMargin.CompareTo(fs1.HighwaterMarkMargin);
}
else
{
// ascending order on tier
return fs1.Filesystem.FilesystemTierEnum.Enum.CompareTo(fs2.Filesystem.FilesystemTierEnum.Enum);
}
}
/// <summary>
/// Helper method to verify if the specified <see cref="StudyStorageLocation"/>
/// is writable and throw <see cref="FilesystemNotWritableException"/> if it is not.
/// </summary>
/// <param name="location"></param>
public void EnsureStorageLocationIsWritable(StudyStorageLocation location)
{
ServerFilesystemInfo fs = GetFilesystemInfo(location.FilesystemKey);
if (!fs.Enable)
{
throw new FilesystemNotWritableException(fs.Filesystem.FilesystemPath)
{
Reason = "It is disabled"
}
}
;
if (!fs.Online)
{
throw new FilesystemNotWritableException(fs.Filesystem.FilesystemPath)
{
Reason = "It is offline/unreachable"
}
}
;
if (fs.ReadOnly)
{
throw new FilesystemNotWritableException(fs.Filesystem.FilesystemPath)
{
Reason = "It is read-only"
}
}
;
if (fs.Full)
{
throw new FilesystemNotWritableException(fs.Filesystem.FilesystemPath)
{
Reason = "It is full"
}
}
;
}
public static int SortByFreeSpace(ServerFilesystemInfo fs1, ServerFilesystemInfo fs2)
{
Platform.CheckForNullReference(fs1, "fs1");
Platform.CheckForNullReference(fs2, "fs2");
Platform.CheckForNullReference(fs1.Filesystem, "fs1.Filesystem");
Platform.CheckForNullReference(fs2.Filesystem, "fs2.Filesystem");
if (fs1 == fs2)
{
return(0);
}
if (fs1.Filesystem.FilesystemTierEnum.Enum.Equals(fs2.Filesystem.FilesystemTierEnum.Enum))
{
// descending order on available size.. smaller margin means less available space
return(fs2.HighwaterMarkMargin.CompareTo(fs1.HighwaterMarkMargin));
}
else
{
// ascending order on tier
return(fs1.Filesystem.FilesystemTierEnum.Enum.CompareTo(fs2.Filesystem.FilesystemTierEnum.Enum));
}
}
public ServerFilesystemInfo SelectFilesystem()
{
IList <ServerFilesystemInfo> list = new List <ServerFilesystemInfo>(_monitor.GetFilesystems());
IList <ServerFilesystemInfo> writableFS = CollectionUtils.Select(list, delegate(ServerFilesystemInfo fs) { return(fs.Writeable); });
StringBuilder log = new StringBuilder();
if (writableFS == null || writableFS.Count == 0)
{
log.AppendLine("No writable storage found");
foreach (ServerFilesystemInfo fs in list)
{
log.AppendLine(string.Format("\t{0} : {1}", fs.Filesystem.Description, fs.StatusString));
}
Platform.Log(LogLevel.Warn, log.ToString());
return(null);
}
writableFS = CollectionUtils.Sort(writableFS, FilesystemSorter.SortByFreeSpace);
ServerFilesystemInfo selectedFS = CollectionUtils.FirstElement(writableFS);
Platform.CheckForNullReference(selectedFS, "selectedFS");
return(selectedFS);
}
/// <summary>
/// Load filesystem information from the database.
/// </summary>
private void LoadFilesystems()
{
bool changed = false;
lock (SyncLock)
{
try
{
List <FilesystemTierEnum> tiers = FilesystemTierEnum.GetAll();
// sorted by enum values
tiers.Sort((tier1, tier2) => tier1.Enum.CompareTo(tier2.Enum));
_tierInfo = new TierInfo();
foreach (FilesystemTierEnum tier in tiers)
{
_tierInfo.Add(tier, new List <ServerFilesystemInfo>());
}
using (IReadContext read = _store.OpenReadContext())
{
IFilesystemEntityBroker filesystemSelect = read.GetBroker <IFilesystemEntityBroker>();
FilesystemSelectCriteria criteria = new FilesystemSelectCriteria();
IList <Filesystem> filesystemList = filesystemSelect.Find(criteria);
foreach (Filesystem filesystem in filesystemList)
{
if (_filesystemList.ContainsKey(filesystem.Key))
{
if ((filesystem.HighWatermark != _filesystemList[filesystem.Key].Filesystem.HighWatermark) ||
(filesystem.LowWatermark != _filesystemList[filesystem.Key].Filesystem.LowWatermark))
{
Platform.Log(LogLevel.Info, "Watermarks have changed for filesystem {0}, Low: {1}, High: {2}",
filesystem.Description, filesystem.LowWatermark, filesystem.HighWatermark);
}
_filesystemList[filesystem.Key].Filesystem = filesystem;
_tierInfo[filesystem.FilesystemTierEnum].Add(_filesystemList[filesystem.Key]);
}
else
{
ServerFilesystemInfo info = new ServerFilesystemInfo(filesystem);
_filesystemList.Add(filesystem.Key, info);
_tierInfo[filesystem.FilesystemTierEnum].Add(info);
info.LoadFreeSpace();
changed = true;
}
}
}
if (changed && _changedListener != null)
{
EventsHelper.Fire(_changedListener, this, new FilesystemChangedEventArgs(this));
}
}
catch (Exception ex)
{
Platform.Log(LogLevel.Error, ex,
"Exception has occurred while updating the filesystem list from the datbase. Retry later");
}
}
}
/// <summary>
/// Returns a value indicating whether the filesystem with the specified key
/// is writable.
/// </summary>
/// <param name="key"></param>
/// <returns></returns>
public bool IsWritable(ServerEntityKey key)
{
ServerFilesystemInfo fs = GetFilesystemInfo(key);
return(fs.Writeable);
}
public ServerFilesystemInfo(ServerFilesystemInfo copy)
{
_filesystem = copy.Filesystem;
_online = copy.Online;
_freeBytes = copy.FreeBytes;
_totalBytes = copy.TotalBytes;
}
private void PurgeStudies(Model.ServiceLock item, ServerFilesystemInfo fs)
{
Platform.Log(LogLevel.Info, "Starting query for Filesystem Purge candidates on '{0}'.",
fs.Filesystem.Description);
try
{
DoStudyPurge(fs, item);
}
catch (Exception e)
{
Platform.Log(LogLevel.Error, e, "Unexpected exception when processing StudyDelete records.");
}
Platform.Log(LogLevel.Info, "{0} studies have been scheduled for purging from filesystem '{1}'",
_studiesPurged, fs.Filesystem.Description);
}
private void MigrateStudies(Model.ServiceLock item, ServerFilesystemInfo fs)
{
ServerFilesystemInfo newFilesystem = FilesystemMonitor.Instance.GetLowerTierFilesystemForStorage(fs);
if (newFilesystem == null)
{
Platform.Log(LogLevel.Warn,
"No writable storage in lower tiers. Tier-migration for '{0}' is disabled at this time.",
fs.Filesystem.Description);
return;
}
Platform.Log(LogLevel.Info, "Starting Tier Migration from {0}", fs.Filesystem.Description);
try
{
DoStudyMigrate(fs, item);
}
catch (Exception e)
{
Platform.Log(LogLevel.Error, e, "Unexpected exception when scheduling tier-migration.");
}
Platform.Log(LogLevel.Info, "{0} studies have been scheduled for migration from filesystem '{1}'",
_studiesMigrated, fs.Filesystem.Description);
}
/// <summary>
/// Do the actual Study migration.
/// </summary>
/// <param name="fs">The filesystem</param>
/// <param name="item">The ServiceLock item being processed.</param>
private void DoStudyMigrate( ServerFilesystemInfo fs, Model.ServiceLock item)
{
FilesystemQueueTypeEnum type = FilesystemQueueTypeEnum.TierMigrate;
while (_bytesToRemove > 0)
{
TimeSpanStatistics queryTime = new TimeSpanStatistics("Query Time");
queryTime.Start();
IList<FilesystemQueue> list = GetFilesystemQueueCandidates(item, Platform.Time, type, false);
queryTime.End();
Platform.Log(LogLevel.Info,
"{1:0.0} MBs needs to be removed from '{0}'. Found {2} studies that can be migrated in {3} seconds",
fs.Filesystem.Description, _bytesToRemove / (1024 * 1024),
list.Count,
queryTime.Value.TotalSeconds);
if (list.Count > 0)
{
ProcessStudyMigrateCandidates(list);
if (CancelPending) break;
}
else
{
break;
}
}
}
/// <summary>
/// Do the actual StudyPurge
/// </summary>
/// <param name="item"></param>
/// <param name="fs">The filesystem being worked on.</param>
private void DoStudyPurge(ServerFilesystemInfo fs, Model.ServiceLock item)
{
DateTime deleteTime = Platform.Time;
FilesystemQueueTypeEnum type = FilesystemQueueTypeEnum.PurgeStudy;
while (_bytesToRemove > 0)
{
Platform.Log(LogLevel.Debug,
"{1:0.0} MBs needs to be removed from '{0}'. Querying for studies that can be purged",
fs.Filesystem.Description, _bytesToRemove / (1024 * 1024));
IList<FilesystemQueue> list =
GetFilesystemQueueCandidates(item, deleteTime, type, false);
if (list.Count > 0)
{
ProcessStudyPurgeCandidates(list);
if (CancelPending) break;
}
else
{
// No candidates
break;
}
}
}
/// <summary>
/// Updates the 'State' of the filesystem associated with the 'FilesystemDelete' <see cref="ServiceLock"/> item
/// </summary>
/// <param name="item"></param>
/// <param name="fs"></param>
private static void UpdateState(Model.ServiceLock item, ServerFilesystemInfo fs)
{
FilesystemState state = null;
if (item.State != null && item.State.DocumentElement!=null)
{
//load from datatabase
state = XmlUtils.Deserialize<FilesystemState>(item.State.DocumentElement);
}
if (state == null)
state = new FilesystemState();
if (fs.AboveHighWatermark)
{
// we don't want to generate alert if the filesystem is offline or not accessible.
if (fs.Online && (fs.Readable || fs.Writeable))
{
TimeSpan ALERT_INTERVAL = TimeSpan.FromMinutes(ServiceLockSettings.Default.HighWatermarkAlertInterval);
if (state.AboveHighWatermarkTimestamp == null)
state.AboveHighWatermarkTimestamp = Platform.Time;
TimeSpan elapse = (state.LastHighWatermarkAlertTimestamp != null) ? Platform.Time - state.LastHighWatermarkAlertTimestamp.Value : Platform.Time - state.AboveHighWatermarkTimestamp.Value;
if (elapse.Duration() >= ALERT_INTERVAL)
{
ServerPlatform.Alert(AlertCategory.System, AlertLevel.Warning, "Filesystem",
AlertTypeCodes.LowResources, null, TimeSpan.Zero,
SR.AlertFilesystemAboveHW,
fs.Filesystem.Description,
TimeSpanFormatter.Format(Platform.Time - state.AboveHighWatermarkTimestamp.Value, true));
state.LastHighWatermarkAlertTimestamp = Platform.Time;
}
}
else
{
state.AboveHighWatermarkTimestamp = null;
state.LastHighWatermarkAlertTimestamp = null;
}
}
else
{
state.AboveHighWatermarkTimestamp = null;
state.LastHighWatermarkAlertTimestamp = null;
}
XmlDocument stateXml = new XmlDocument();
stateXml.AppendChild(stateXml.ImportNode(XmlUtils.Serialize(state), true));
IPersistentStore store = PersistentStoreRegistry.GetDefaultStore();
using (IUpdateContext ctx = store.OpenUpdateContext(UpdateContextSyncMode.Flush))
{
ServiceLockUpdateColumns columns = new ServiceLockUpdateColumns();
columns.State = stateXml;
IServiceLockEntityBroker broker = ctx.GetBroker<IServiceLockEntityBroker>();
broker.Update(item.GetKey(), columns);
ctx.Commit();
}
}
private bool ArchiveLogs(ServerFilesystemInfo archiveFs)
{
string archivePath = Path.Combine(archiveFs.Filesystem.FilesystemPath, "AlertLog");
DateTime cutOffTime = Platform.Time.Date.AddDays(ServiceLockSettings.Default.AlertCachedDays*-1);
AlertSelectCriteria criteria = new AlertSelectCriteria();
criteria.InsertTime.LessThan(cutOffTime);
criteria.InsertTime.SortAsc(0);
using (ServerExecutionContext context = new ServerExecutionContext())
{
IAlertEntityBroker broker = context.ReadContext.GetBroker<IAlertEntityBroker>();
ImageServerLogWriter<Alert> writer = new ImageServerLogWriter<Alert>(archivePath, "Alert");
List<ServerEntityKey> keyList = new List<ServerEntityKey>(500);
try
{
broker.Find(criteria, delegate(Alert result)
{
keyList.Add(result.Key);
// If configured, don't flush to disk. We just delete the contents of keyList below.
if (!ServiceLockSettings.Default.AlertDelete)
{
if (writer.WriteLog(result, result.InsertTime))
{
// The logs been flushed, delete the log entries cached.
using (
IUpdateContext update =
PersistentStoreRegistry.GetDefaultStore().OpenUpdateContext(UpdateContextSyncMode.Flush)
)
{
IApplicationLogEntityBroker updateBroker =
update.GetBroker<IApplicationLogEntityBroker>();
foreach (ServerEntityKey key in keyList)
updateBroker.Delete(key);
update.Commit();
}
keyList = new List<ServerEntityKey>();
}
}
});
writer.FlushLog();
if (keyList.Count > 0)
{
using (
IUpdateContext update =
PersistentStoreRegistry.GetDefaultStore().OpenUpdateContext(UpdateContextSyncMode.Flush))
{
IAlertEntityBroker updateBroker = update.GetBroker<IAlertEntityBroker>();
foreach (ServerEntityKey key in keyList)
updateBroker.Delete(key);
update.Commit();
}
}
}
catch (Exception e)
{
Platform.Log(LogLevel.Error, e, "Unexpected exception when purging Alert log files.");
writer.Dispose();
return false;
}
writer.Dispose();
return true;
}
}
private bool ArchiveLogs(ServerFilesystemInfo archiveFs)
{
try
{
using (ServerExecutionContext context = new ServerExecutionContext())
{
string archivePath = Path.Combine(archiveFs.Filesystem.FilesystemPath, "ApplicationLog");
ApplicationLogSelectCriteria criteria = new ApplicationLogSelectCriteria();
criteria.Timestamp.SortAsc(0);
IApplicationLogEntityBroker broker = context.ReadContext.GetBroker<IApplicationLogEntityBroker>();
ApplicationLog firstLog = broker.FindOne(criteria);
if (firstLog == null)
return true;
DateTime currentCutOffTime = firstLog.Timestamp.AddMinutes(5);
int cachedDays = ServiceLockSettings.Default.ApplicationLogCachedDays;
if (cachedDays < 0) cachedDays = 0;
DateTime cutOffTime = Platform.Time.Date.AddDays(cachedDays*-1);
if (currentCutOffTime > cutOffTime)
return true;
using (
ImageServerLogWriter<ApplicationLog> writer =
new ImageServerLogWriter<ApplicationLog>(archivePath, "ApplicationLog"))
{
while (currentCutOffTime < cutOffTime)
{
if (!ArchiveTimeRange(writer, currentCutOffTime))
{
writer.FlushLog();
return false;
}
currentCutOffTime = currentCutOffTime.AddMinutes(5);
}
// Now flush the last potential 5 minutes.
if (!ArchiveTimeRange(writer, cutOffTime))
{
writer.FlushLog();
return false;
}
writer.FlushLog();
}
return true;
}
}
catch (Exception e)
{
Platform.Log(LogLevel.Error, e, "Unexpected exception when writing log file.");
return false;
}
}
