Sameer Kamat wrote:
Hello,
I am synchronizing one ~15GB file over the network. This file from
the previous day exists on the destination and I synchronized today's
file over. This is the output.
Number of files: 1
Number of files transferred: 1
Total file size: 15919685632 bytes
Total transferred file size: 15919685632 bytes
Literal data: 6208029752 bytes
Matched data: 9711655880 bytes
File list size: 44
Total bytes written: 3576325033
Total bytes read: 433560
wrote 3576325033 bytes read 433560 bytes 962140.85 bytes/sec
total size is 15919685632 speedup is 4.45
Does the literal data indicate the actual number of bytes it sent over
the wire to the destination ? What is Total bytes written ? This
probably has been discussed earlier, but I would really appreciate it if
someone could explain it again. On the destination side, I see that a
temp file of 15919685632 bytes was constructed. Now if the all of the
15919685632 bytes were not sent over, is this temp file on the server
constructed from the existing file on the destination and the changes
sent from the source ? Or were the entire 15919685632 bytes sent over ?
I can tell you what I have learned from experience. The "Literal data" is the
data that doesn't match and needs to be sent to the destination. If you use
--whole-file-mode, you will notice that "Total file size" and "Literal data"
have the same value. My guess is that you were using compression, since "Total
bytes written" is around half of "Literal data", and I believe this figure also
will include any control information. For such a large file, you may want to try
using --inplace in which case it won't create the temp file - which as you
suspect, is constructed from the existing destination file and the data sent
over the wire.
Linus
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