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Hi @paulmillar, thanks for your comment! In practice there's no way for the client to know whether the source would send some extra data compared to the file size yielded by the stat operation, because, if necessary, the client trims the last chunk so the total number of read bytes equals to the file size. For example, let us assume we are copying a 12MB file and we are using the default chunk size of 8MB. The client will read first data chunk of 8MB and second data chunk of 4MB (in total 12MB). The server won't send any extra data (past the end of file) because the client asks only for 12MB. If the file size is expected to change (which in most case it is not), there is the `-Z | --dynamic-src` option that allows to read the file until EOF is reached. -- You are receiving this because you are subscribed to this thread. Reply to this email directly or view it on GitHub: https://github.com/xrootd/xrootd/issues/1492#issuecomment-895887983 ######################################################################## Use REPLY-ALL to reply to list To unsubscribe from the XROOTD-DEV list, click the following link: https://listserv.slac.stanford.edu/cgi-bin/wa?SUBED1=XROOTD-DEV&A=1