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s3,swift: Add --use-server-modtime

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`--use-server-modtime` stops s3 and swift retrieving the modtime from metadata which enables a fast sync mode with the `--update` flag.
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Peter Baumgartner
2018-04-13 06:32:17 -06:00
committed by Nick Craig-Wood
parent 6b67489133
commit 1db68571fd
7 changed files with 47 additions and 0 deletions
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docs/content/docs.md
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@@ -799,6 +799,19 @@ This can be useful when transferring to a remote which doesn't support
mod times directly as it is more accurate than a `--size-only` check
and faster than using `--checksum`.
### --use-server-modtime ###
Some object-store backends (e.g, Swift, S3) do not preserve file modification
times (modtime). On these backends, rclone stores the original modtime as
additional metadata on the object. By default it will make an API call to
retrieve the metadata when the modtime is needed by an operation.
Use this flag to disable the extra API call and rely instead on the server's
modified time. In cases such as a local to remote sync, knowing the local file
is newer than the time it was last uploaded to the remote is sufficient. In
those cases, this flag can speed up the process and reduce the number of API
calls necessary.
### -v, -vv, --verbose ###
With `-v` rclone will tell you about each file that is transferred and