125 lines
3.2 KiB
Markdown
125 lines
3.2 KiB
Markdown
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---
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title: "B2"
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description: "Backblaze B2"
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date: "2015-12-29"
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---
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<i class="fa fa-fire"></i>Backblaze B2
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----------------------------------------
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B2 is [Backblaze's cloud storage system](https://www.backblaze.com/b2/).
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Paths are specified as `remote:bucket` (or `remote:` for the `lsd`
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command.) You may put subdirectories in too, eg `remote:bucket/path/to/dir`.
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Here is an example of making a b2 configuration. First run
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rclone config
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This will guide you through an interactive setup process. You will
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need your account number (a short hex number) and key (a long hex
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number) which you can get from the b2 control panel.
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```
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No remotes found - make a new one
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n) New remote
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q) Quit config
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n/q> n
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name> remote
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What type of source is it?
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Choose a number from below
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1) amazon cloud drive
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2) b2
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3) drive
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4) dropbox
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5) google cloud storage
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6) swift
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7) hubic
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8) local
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9) onedrive
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10) s3
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type> 2
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Account ID
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account> 123456789abc
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Application Key
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key> 0123456789abcdef0123456789abcdef0123456789
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Endpoint for the service - leave blank normally.
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endpoint>
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Remote config
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--------------------
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[remote]
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account = 123456789abc
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key = 0123456789abcdef0123456789abcdef0123456789
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endpoint =
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--------------------
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y) Yes this is OK
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e) Edit this remote
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d) Delete this remote
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y/e/d> y
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```
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This remote is called `remote` and can now be used like this
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See all buckets
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rclone lsd remote:
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Make a new bucket
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rclone mkdir remote:bucket
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List the contents of a bucket
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rclone ls remote:bucket
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Sync `/home/local/directory` to the remote bucket, deleting any
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excess files in the bucket.
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rclone sync /home/local/directory remote:bucket
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### Modified time ###
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The modified time is stored as metadata on the object as
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`X-Bz-Info-src_last_modified_millis` as milliseconds since 1970-01-01
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in the Backblaze standard. Other tools should be able to use this as
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a modified time.
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Modified times are set on upload, read on download and shown in
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listings. They are not used in syncing as unfortunately B2 doesn't
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have an API method to set them independently of doing an upload.
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### SHA1 checksums ###
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The SHA1 checksums of the files are checked on upload and download,
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but they aren't used for sync as they aren't compatible with the MD5
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checksums rclone normally uses.
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### Versions ###
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When rclone uploads a new version of a file it creates a [new version
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of it](https://www.backblaze.com/b2/docs/file_versions.html).
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Likewise when you delete a file, the old version will still be
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available.
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The old versions of files are visible in the B2 web interface, but not
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via rclone yet.
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Rclone doesn't provide any way of managing old versions (downloading
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them or deleting them) at the moment. When you `purge` a bucket, all
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the old versions will be deleted.
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### Bugs ###
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Note that when uploading a file, rclone has to make a temporary copy
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of it in your temp filing system. This is due to a weakness in the B2
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API which I'm hoping will be addressed soon.
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### API ###
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Here are [some notes I made on the backblaze
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API](https://gist.github.com/ncw/166dabf352b399f1cc1c) while
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integrating it with rclone which detail the changes I'd like to see.
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With a couple of small tweaks Backblaze could enable rclone to not
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make a temporary copy of all files and fully support modification
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times.
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