internal void PrepareRollups(DocumentsOperationContext context, DateTime currentTime, long take, long start, List <RollupState> states, out Stopwatch duration)
{
duration = Stopwatch.StartNew();
var table = context.Transaction.InnerTransaction.OpenTable(RollupSchema, TimeSeriesRollupTable);
if (table == null)
{
return;
}
var currentTicks = currentTime.Ticks;
using (DocumentsStorage.GetEtagAsSlice(context, start, out var startSlice))
{
foreach (var item in table.SeekForwardFrom(RollupSchema.Indexes[NextRollupIndex], startSlice, 0))
{
if (take <= 0)
{
return;
}
var rollUpTime = DocumentsStorage.TableValueToEtag((int)RollupColumns.NextRollup, ref item.Result.Reader);
if (rollUpTime > currentTicks)
{
return;
}
DocumentsStorage.TableValueToSlice(context, (int)RollupColumns.Key, ref item.Result.Reader, out var key);
SplitKey(key, out var docId, out var name);
name = context.DocumentDatabase.DocumentsStorage.TimeSeriesStorage.GetOriginalName(context, docId, name);
var state = new RollupState
{
Key = key,
DocId = docId,
Name = name,
Collection = DocumentsStorage.TableValueToId(context, (int)RollupColumns.Collection, ref item.Result.Reader),
NextRollup = new DateTime(rollUpTime),
RollupPolicy = DocumentsStorage.TableValueToString(context, (int)RollupColumns.PolicyToApply, ref item.Result.Reader),
Etag = DocumentsStorage.TableValueToLong((int)RollupColumns.Etag, ref item.Result.Reader),
ChangeVector = DocumentsStorage.TableValueToChangeVector(context, (int)RollupColumns.ChangeVector, ref item.Result.Reader)
};
if (_logger.IsInfoEnabled)
{
_logger.Info($"{state} is prepared.");
}
states.Add(state);
take--;
}
}
}
private void RollupOne(DocumentsOperationContext context, Table table, RollupState item, TimeSeriesPolicy policy, TimeSeriesCollectionConfiguration config)
{
var tss = context.DocumentDatabase.DocumentsStorage.TimeSeriesStorage;
var rawTimeSeries = item.Name.Split(TimeSeriesConfiguration.TimeSeriesRollupSeparator)[0];
var intoTimeSeries = policy.GetTimeSeriesName(rawTimeSeries);
var rollupStart = item.NextRollup.Add(-policy.AggregationTime);
if (config.MaxRetention < TimeValue.MaxValue)
{
var next = new DateTime(NextRollup(_now.Add(-config.MaxRetention), policy)).Add(-policy.AggregationTime);
var rollupStartTicks = Math.Max(rollupStart.Ticks, next.Ticks);
rollupStart = new DateTime(rollupStartTicks);
}
var intoReader = tss.GetReader(context, item.DocId, intoTimeSeries, rollupStart, DateTime.MaxValue);
var previouslyAggregated = intoReader.AllValues().Any();
if (previouslyAggregated)
{
var changeVector = intoReader.GetCurrentSegmentChangeVector();
if (ChangeVectorUtils.GetConflictStatus(item.ChangeVector, changeVector) == ConflictStatus.AlreadyMerged)
{
// this rollup is already done
table.DeleteByKey(item.Key);
return;
}
}
if (_isFirstInTopology == false)
{
return;
}
var rollupEnd = new DateTime(NextRollup(_now, policy)).Add(-policy.AggregationTime).AddMilliseconds(-1);
var reader = tss.GetReader(context, item.DocId, item.Name, rollupStart, rollupEnd);
if (previouslyAggregated)
{
var hasPriorValues = tss.GetReader(context, item.DocId, item.Name, DateTime.MinValue, rollupStart).AllValues().Any();
if (hasPriorValues == false)
{
table.DeleteByKey(item.Key);
var first = tss.GetReader(context, item.DocId, item.Name, rollupStart, DateTime.MaxValue).First();
if (first == default)
{
return;
}
if (first.Timestamp > item.NextRollup)
{
// if the 'source' time-series doesn't have any values it is retained.
// so we need to aggregate only from the next time frame
using (var slicer = new TimeSeriesSliceHolder(context, item.DocId, item.Name, item.Collection))
{
tss.Rollups.MarkForPolicy(context, slicer, policy, first.Timestamp);
}
return;
}
}
}
// rollup from the the raw data will generate 6-value roll up of (first, last, min, max, sum, count)
// other rollups will aggregate each of those values by the type
var mode = item.Name.Contains(TimeSeriesConfiguration.TimeSeriesRollupSeparator) ? AggregationMode.FromAggregated : AggregationMode.FromRaw;
var rangeSpec = new RangeGroup();
switch (policy.AggregationTime.Unit)
{
case TimeValueUnit.Second:
rangeSpec.Ticks = TimeSpan.FromSeconds(policy.AggregationTime.Value).Ticks;
rangeSpec.TicksAlignment = RangeGroup.Alignment.Second;
break;
case TimeValueUnit.Month:
rangeSpec.Months = policy.AggregationTime.Value;
break;
default:
throw new ArgumentOutOfRangeException(nameof(policy.AggregationTime.Unit), $"Not supported time value unit '{policy.AggregationTime.Unit}'");
}
rangeSpec.InitializeRange(rollupStart);
var values = GetAggregatedValues(reader, rangeSpec, mode);
if (previouslyAggregated)
{
// if we need to re-aggregate we need to delete everything we have from that point on.
var removeRequest = new TimeSeriesStorage.DeletionRangeRequest
{
Collection = item.Collection,
DocumentId = item.DocId,
Name = intoTimeSeries,
From = rollupStart,
To = DateTime.MaxValue,
};
tss.DeleteTimestampRange(context, removeRequest);
}
var before = context.LastDatabaseChangeVector;
var after = tss.AppendTimestamp(context, item.DocId, item.Collection, intoTimeSeries, values, verifyName: false);
if (before != after)
{
RolledUp++;
}
table.DeleteByKey(item.Key);
var stats = tss.Stats.GetStats(context, item.DocId, item.Name);
if (stats.End > rollupEnd)
{
// we know that we have values after the current rollup and we need to mark them
var nextRollup = rollupEnd.AddMilliseconds(1);
intoReader = tss.GetReader(context, item.DocId, item.Name, nextRollup, DateTime.MaxValue);
if (intoReader.Init() == false)
{
Debug.Assert(false, "We have values but no segment?");
return;
}
using (var slicer = new TimeSeriesSliceHolder(context, item.DocId, item.Name, item.Collection))
{
tss.Rollups.MarkForPolicy(context, slicer, policy, intoReader.First().Timestamp);
}
}
}
private static void MarkForNextPolicyAfterRollup(DocumentsOperationContext context, Table table, RollupState item, TimeSeriesPolicy policy, TimeSeriesStorage tss,
DateTime rollupEnd)
{
table.DeleteByKey(item.Key);
(long Count, DateTime Start, DateTime End)stats = tss.Stats.GetStats(context, item.DocId, item.Name);
if (stats.End > rollupEnd)
{
// we know that we have values after the current rollup and we need to mark them
var nextRollup = rollupEnd.AddMilliseconds(1);
TimeSeriesReader intoReader = tss.GetReader(context, item.DocId, item.Name, nextRollup, DateTime.MaxValue);
if (intoReader.Init() == false)
{
Debug.Assert(false, "We have values but no segment?");
return;
}
using (var slicer = new TimeSeriesSliceHolder(context, item.DocId, item.Name, item.Collection))
{
tss.Rollups.MarkForPolicy(context, slicer, policy, intoReader.First().Timestamp);
}
}
}
