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Posted to reviews@iotdb.apache.org by "zhou-hao (via GitHub)" <gi...@apache.org> on 2024/10/11 04:11:39 UTC
[I] Java 原生接口使用咨询 [iotdb]
zhou-hao opened a new issue, #13718:
URL: https://github.com/apache/iotdb/issues/13718
1. Tablet 虽然支持多行，但是实际情况单个设备可能上报频率并不高，Tablet往往只会有一行，这种场景下执行insertTablet 写入性能并不高。
2. insertTablets 的参数是`Map<deviceId,Tablet>` ,如果想要做缓冲批量写入时，就得去拆分同一个批次的相同设备的Tablet。
疑问： 有没有更合适的批量写入不同设备的方式？
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Re: [I] Java 原生接口使用咨询 [iotdb]
Posted by "github-actions[bot] (via GitHub)" <gi...@apache.org>.
github-actions[bot] commented on issue #13718:
URL: https://github.com/apache/iotdb/issues/13718#issuecomment-2406519904
Hi, this is your first issue in IoTDB project. Thanks for your report. Welcome to join the community!
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Re: [I] Java 原生接口使用咨询 [iotdb]
Posted by "HTHou (via GitHub)" <gi...@apache.org>.
HTHou commented on issue #13718:
URL: https://github.com/apache/iotdb/issues/13718#issuecomment-2407114304
`tablet.addTimestamp(0, 1);` 后面可以加上 `tablet.rowSize++;` 可以解决数据没写进去的问题。
如果每行数据的 deviceID 都不同，可以试试 insertRecords 接口，对这样的场景更友好。
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Re: [I] Java 原生接口使用咨询 [iotdb]
Posted by "zhou-hao (via GitHub)" <gi...@apache.org>.
zhou-hao closed issue #13718: Java 原生接口使用咨询
URL: https://github.com/apache/iotdb/issues/13718
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Re: [I] Java 原生接口使用咨询 [iotdb]
Posted by "zhou-hao (via GitHub)" <gi...@apache.org>.
zhou-hao commented on issue #13718:
URL: https://github.com/apache/iotdb/issues/13718#issuecomment-2407005341
https://github.com/zhou-hao/iotdb-test/blob/master/src/main/java/org/example/iotdb/IoTDBTest.java
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Re: [I] Java 原生接口使用咨询 [iotdb]
Posted by "zhou-hao (via GitHub)" <gi...@apache.org>.
zhou-hao commented on issue #13718:
URL: https://github.com/apache/iotdb/issues/13718#issuecomment-2410101060
好的，感谢！
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Re: [I] Java 原生接口使用咨询 [iotdb]
Posted by "zhou-hao (via GitHub)" <gi...@apache.org>.
zhou-hao commented on issue #13718:
URL: https://github.com/apache/iotdb/issues/13718#issuecomment-2406960305
使用 Tablet 写入数据后 查询不到。写入也没有返回任何错误。请问有什么写入条件要求吗？
```java
public static void main(String[] args) throws Exception {
int port = startIotDB();
try (Session session = new Session.Builder()
.host("127.0.0.1")
.port(port)
.build()) {
session.open();
Tablet tablet = new Tablet(
"root.db1.test",
Collections.singletonList(new MeasurementSchema("temp", TSDataType.FLOAT)),
1);
tablet.addTimestamp(0, 1);
tablet.addValue("temp", 0, 1.0F);
session.insertTablet(tablet);
SessionDataSet set = session.executeQueryStatement("select * from root.db1.test");
if(!set.hasNext()){
throw new IllegalStateException();
}
}
}
```
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