apache / apache/iotdb

[Bug] Synced data stored as unsequenced

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Description

### Search before asking

- [X] I searched in the [issues](https://github.com/apache/iotdb/issues) and found nothing similar.

### Version

Both machines running Ubuntu 20.04 and docker image of IoTDB version 1.2.2

### Describe the bug and provide the minimal reproduce step

1. Start two nodes in standalone configuration
2. Set pipe to cloud node
3. Perform insertions at the edge node

### What did you expect to see?

All data inserted to be stored in the same manner on both nodes.

### What did you see instead?

Although on the edge node data is stored in sequence TsFiles, the cloud node treats synced data as delayed and the data is stored in unsequence TsFiles.

On the cloud node running `du -h .` on the data folder shows most data usage in unsequence files
```
4.0K ./datanode/data/sequence
6.9G ./datanode/data/unsequence/root.gps/2/2808
6.9G ./datanode/data/unsequence/root.gps/2
6.9G ./datanode/data/unsequence/root.gps/1/2808
6.9G ./datanode/data/unsequence/root.gps/1
6.7G ./datanode/data/unsequence/root.gps/3/2808
6.7G ./datanode/data/unsequence/root.gps/3
6.4G ./datanode/data/unsequence/root.gps/4/2808
6.4G ./datanode/data/unsequence/root.gps/4
4.7G ./datanode/data/unsequence/root.gps/5/2808
4.7G ./datanode/data/unsequence/root.gps/5
32G ./datanode/data/unsequence/root.gps
32G ./datanode/data/unsequence
32G ./datanode/data
```

While on the edge nodes running `du -h .` on the data folder shows most data usage in sequence files
```
8.6G ./datanode/data/sequence/root.gps/2/2808
8.6G ./datanode/data/sequence/root.gps/2
6.9G ./datanode/data/sequence/root.gps/4/2808
6.9G ./datanode/data/sequence/root.gps/4
7.6G ./datanode/data/sequence/root.gps/1/2808
7.6G ./datanode/data/sequence/root.gps/1
7.1G ./datanode/data/sequence/root.gps/3/2808
7.1G ./datanode/data/sequence/root.gps/3
30G ./datanode/data/sequence/root.gps
30G ./datanode/data/sequence
26M ./datanode/data/unsequence/root.gps/2/2808
26M ./datanode/data/unsequence/root.gps/2
17M ./datanode/data/unsequence/root.gps/4/2808
17M ./datanode/data/unsequence/root.gps/4
26M ./datanode/data/unsequence/root.gps/1/2808
26M ./datanode/data/unsequence/root.gps/1
26M ./datanode/data/unsequence/root.gps/3/2808
26M ./datanode/data/unsequence/root.gps/3
94M ./datanode/data/unsequence/root.gps
94M ./datanode/data/unsequence
34G ./datanode/data
34G ./datanode
```

Tests performing query operations seem to indicate that this negatively impacts query performance as unsequence files negatively impact query performance. These tests were run using IoTDB version 1.1.1, but since data is still stored as unsequenced in 1.2.2, this behaviour should still be present.

### Anything else?

Edge node is running in a Docker container limited to 4 CPU cores, 4GB of RAM, 44MB/s disk reads, 40MB/s disk writes, 2700 read IOps, 1200 write IOps
Cloud node is running in a Docker container with no limitations. Host machine has a 6 core CPU and 16GB of RAM

### Are you willing to submit a PR?

- [ ] I'm willing to submit a PR!

Guide de contribution

Ouvrir le guide de contribution

Piste de recherche

Commencez par reproduire la configuration autonome à deux nœuds avec l’image Docker IoTDB 1.2.2, en configurant un pipe depuis le nœud edge et en inspectant les dossiers datanode/data/sequence et datanode/data/unsequence du nœud cloud. Comparez les fichiers stockés et le comportement des requêtes après les insertions sur l’edge ; le travail est considéré comme terminé lorsque les données synchronisées sont stockées sous forme de fichiers sequence sur le nœud cloud sans l’impact signalé sur les performances des requêtes.

Rédigé par le modèle d'indexation à partir du texte de l'issue.

Évaluation

Stack technique
docker, java
Domaine
databases, distributed-systems
Type d'issue
Bug
Difficulté
4/5
Temps estimé
3-5 jours
Activité
À l'abandon
Clarté
Plutôt claire
Accessibilité débutants
35/100

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