Should we stop gitaly while backing repositors even configured backup strategy to "COPY"


My command to back up GitLab is “gitlab-rake gitlab:backup:create STRATEGY=copy GZIP_RSYNCABLE=yes --trace”
But I am not sure if I should stop gitaly while backing up the repositories since the backup takes up to 8 hours to finish.
If I stop the gitaly, then the other user around the world won’t be able to access it.

How does GitLab back up while the strategy is “COPY”?
Is it okay to back up with a strategy that is “COPY” and don’t stop gitaly?