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sync,copy,move: add --check-first to do all checking before starting transfers

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See: https://forum.rclone.org/t/rclone-sync-doing-transfer-and-checking-in-paralel/16352/
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Nick Craig-Wood
2020-05-15 11:39:07 +01:00
parent 147f97d1f7
commit 518d39815c
5 changed files with 50 additions and 4 deletions
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docs/content/docs.md
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@@ -429,6 +429,20 @@ Set to 0 to disable the buffering for the minimum memory usage.
Note that the memory allocation of the buffers is influenced by the
[--use-mmap](#use-mmap) flag.
### --check-first ###
If this flag is set then in a `sync`, `copy` or `move`, rclone will do
all the checks to see whether files need to be transferred before
doing any of the transfers. Normally rclone would start running
transfers as soon as possible.
This flag can be useful on IO limited systems where transfers
interfere with checking.
Using this flag can use more memory as it effectively sets
`--max-backlog` to infinite. This means that all the info on the
objects to transfer is held in memory before the transfers start.
### --checkers=N ###
The number of checkers to run in parallel. Checkers do the equality