create metadate template unsuccessfully in the Apache IoTDB

Question

I try to create the metadata template, but it failed. I got the warning no set the schemaNames.I don't know the reason about it. Apache IoTDB version: 0.13 If someone knows it, please let me know.

Answer 1

1. Check the overall memory usage of Apache IoTDB. If the memory occupation is too high, you can set enable_last_cache=false to close the latest value cache. This cache will occupy a lot of memory when the number of timeseries is large.
2. Adjust the parameter according to your own load: write_ read_ schema_ free_ memory_ Proportion, and appropriately increase the proportion of schema.

For the long-term scheme, you can take a look at the scheme of storing metadata based on rocksdb contributed in 0.14. In theory, there is no upper limit on the metadata storage of a single machine. Refer to this document for details: https://github.com/apache/iotdb/blob/master/docs/UserGuide/Data-Modeling/SchemaRegion-rocksdb.md