samperson1997 commented on a change in pull request #1100:
URL: https://github.com/apache/incubator-iotdb/pull/1100#discussion_r415345210
##########
File path:
tsfile/src/main/java/org/apache/iotdb/tsfile/write/writer/TsFileIOWriter.java
##########
@@ -304,22 +311,120 @@ public void endFile() throws IOException {
deviceTimeseriesMetadataMap.computeIfAbsent(device, k -> new
ArrayList<>())
.add(timeseriesMetaData);
}
- // create DeviceMetaDataMap device -> Pair<TimeseriesMetaDataOffset,
TimeseriesMetaDataLength>
- Map<String, Pair<Long, Integer>> deviceMetadataMap = new HashMap<>();
+
+ // create TsFileMetadata
+ Map<String, Queue<MetadataIndex>> deviceMetadataIndexMap = new TreeMap<>();
+ int maxNumOfIndexItems = config.getMaxNumberOfIndexItemsInNode();
+
+ // for timeseriesMetadata of each device
for (Map.Entry<String, List<TimeseriesMetadata>> entry :
deviceTimeseriesMetadataMap
.entrySet()) {
- String device = entry.getKey();
- List<TimeseriesMetadata> timeseriesMetadataList = entry.getValue();
- long offsetOfFirstTimeseriesMetaDataInDevice = out.getPosition();
- int size = 0;
- for (TimeseriesMetadata timeseriesMetaData : timeseriesMetadataList) {
- size += timeseriesMetaData.serializeTo(out.wrapAsStream());
+ if (entry.getValue().isEmpty()) {
+ continue;
+ }
+ Queue<MetadataIndex> measurementMetadataIndexQueue = new ArrayDeque<>();
+ TimeseriesMetadata timeseriesMetadata;
+ for (int i = 0; i < entry.getValue().size(); i++) {
+ timeseriesMetadata = entry.getValue().get(i);
+ if (i % maxNumOfIndexItems == 0) {
+ measurementMetadataIndexQueue
+ .add(new MetadataIndex(timeseriesMetadata.getMeasurementId(),
out.getPosition(),
+ ChildMetadataIndexType.MEASUREMENT));
+ }
+ timeseriesMetadata.serializeTo(out.wrapAsStream());
+ }
+ measurementMetadataIndexQueue
+ .add(new MetadataIndex("", out.getPosition(),
ChildMetadataIndexType.MEASUREMENT));
+
+ int queueSize = measurementMetadataIndexQueue.size();
+ MetadataIndex metadataIndex;
+ while (queueSize > maxNumOfIndexItems) {
+ for (int i = 0; i < queueSize; i++) {
+ metadataIndex = measurementMetadataIndexQueue.poll();
+ if (i % maxNumOfIndexItems == 0) {
+ if (i != 0) {
+ addEmptyMetadataIndex(ChildMetadataIndexType.MEASUREMENT_INDEX);
Review comment:
Renamed
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