Can I regenerate metadata for the exist data made by juicefs client?

[jjh2088-woowahan]

hi all, I have a question about metadata.
When there is no metadata, but there is S3 data written by juicefs client,
is there any way to regenerate metadata for these s3 files?

for example,

1. write data to hive(use s3) by juicefs-hadoop.jar
2. for archiving, delete tables definition and delete juicefs metadata as well. But not delete s3 data
3. later, if I want to look up this s3 data in the juicefs client, how can I generate metadata?

[zhijian-pro]

I don't understand the question. What does metadata mean? There are many concepts here, such as hive's metadata, s3's metadata, and juicefs' metadata

[jjh2088-woowahan]

I mean juicefs' metadata.

[jiefenghuang]

 It’s not possible to generate metadata from data for now, but you can use the dump command to back up metadata.