Currently, we can not have more than one global topology operation at the same time. This means that we can not have concurrent truncate operations because truncate is implemented as a global topology operation.
Truncate excludes with other topology operations, and has to wait for those to complete before truncate starts executing. This can lead to truncate timeouts. In these cases the client retries the truncate operation, which will check for ongoing global topology operations, and will fail with
an "Another global topology request is ongoing, please retry." error.
This can be avoided by truncate checking if the ongoing global topology operation is a truncate running for the same table who's truncate has just been requested again. In this case, we can wait for the ongoing truncate to complete instead of immediately failing the operation, and
provide a better user experience.
This is an improvement, backport is not needed.
Closes#22166Closesscylladb/scylladb#22371
* github.com:scylladb/scylladb:
test: add test for re-cycling ongoing truncate operations
truncate: add additional logging and improve error message during truncate
storage_proxy: wait on already running truncate for the same table
storage_proxy: allow multiple truncate table fibers per shard
22386a6ceb