Here is a page from our docs on how to perform Backup & Restore: https://docs.timescale.com/latest/using-timescaledb/backup
Not sure what's going on in that one Github issue, but we are looking into it.
"Data is successfully dumped. also i can see the constraints, indexes are also copied successfully."
The warnings are produced by COPY TO, which is used by pg_dump, since COPY TO doesn't copy chunks. It is not an issue for pg_dump, since it also do COPY TO on each chunk table.
Timescale engineer here - was part of discussion about this warning. We need to do another round and see how to remove this confusion.
That issue is now closed by the original author:
"Data is successfully dumped. also i can see the constraints, indexes are also copied successfully."
Does a WAL backup approach work?
https://docs.timescale.com/latest/using-timescaledb/backup
There are hundreds of thousands of TimescaleDB databases in production so this is generally not an issue.