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b2 doc fixes

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Nick Craig-Wood 2016-07-13 14:50:47 +01:00
parent 63f6827a0d
commit c3e996f10f
1 changed files with 16 additions and 7 deletions
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docs/content/b2.md
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@ -104,7 +104,7 @@ method to set the modification time independent of doing an upload.
### SHA1 checksums ### ### SHA1 checksums ###
The SHA1 checksums of the files are checked on upload and download and The SHA1 checksums of the files are checked on upload and download and
will be used in the syncing process. You can use the `--checksum` flag. will be used in the syncing process.
Large files which are uploaded in chunks will store their SHA1 on the Large files which are uploaded in chunks will store their SHA1 on the
object as `X-Bz-Info-large_file_sha1` as recommended by Backblaze. object as `X-Bz-Info-large_file_sha1` as recommended by Backblaze.
@ -119,6 +119,11 @@ depending on your hardware, how big the files are, how much you want
to load your computer, etc. The default of `--transfers 4` is to load your computer, etc. The default of `--transfers 4` is
definitely too low for Backblaze B2 though. definitely too low for Backblaze B2 though.
Note that uploading big files (bigger than 200 MB by default) will use
a 96 MB RAM buffer by default. There can be at most `--transfers` of
these in use at any moment, so this sets the upper limit on the memory
used.
### Versions ### ### Versions ###
When rclone uploads a new version of a file it creates a [new version When rclone uploads a new version of a file it creates a [new version
@ -185,15 +190,19 @@ system.
#### --b2-chunk-size valuee=SIZE #### #### --b2-chunk-size valuee=SIZE ####
When uploading large files chunk the file into this size. Note that When uploading large files chunk the file into this size. Note that
these chunks are buffered in memory. 100,000,000 Bytes is the minimim these chunks are buffered in memory and there might a maximum of
size (default 96M). `--transfers` chunks in progress at once. 100,000,000 Bytes is the
minimim size (default 96M).
#### --b2-upload-cutoff=SIZE #### #### --b2-upload-cutoff=SIZE ####
Cutoff for switching to chunked upload (default 4.657GiB == Cutoff for switching to chunked upload (default 190.735 MiB == 200
5GB). Files above this size will be uploaded in chunks of MB). Files above this size will be uploaded in chunks of
`--b2-chunk-size`. The default value is the largest file which can be `--b2-chunk-size`.
uploaded without chunks.
This value should be set no larger than 4.657GiB (== 5GB) as this is
the largest file size that can be uploaded.
#### --b2-test-mode=FLAG #### #### --b2-test-mode=FLAG ####