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This special remote type stores file contents in a bucket in Amazon S3
or a similar service.
See [[tips/using_Amazon_S3]] and
[[tips/Internet_Archive_via_S3]] for usage examples.
## configuration
The standard environment variables `AWS_ACCESS_KEY_ID` and
`AWS_SECRET_ACCESS_KEY` are used to supply login credentials
for Amazon. You need to set these only when running
`git annex initremote`, as they will be cached in a file only you
can read inside the local git repository.
A number of parameters can be passed to `git annex initremote` to configure
the S3 remote.
* `encryption` - One of "none", "hybrid", "shared", or "pubkey".
See [[encryption]].
* `keyid` - Specifies the gpg key to use for [[encryption]].
* `embedcreds` - Optional. Set to "yes" embed the login credentials inside
the git repository, which allows other clones to also access them. This is
the default when gpg encryption is enabled; the credentials are stored
encrypted and only those with the repository's keys can access them.
It is not the default when using shared encryption, or no encryption.
Think carefully about who can access your repository before using
embedcreds without gpg encryption.
* `datacenter` - Defaults to "US". Other values include "EU",
"us-west-1", and "ap-southeast-1".
* `storageclass` - Default is "STANDARD". If you have configured git-annex
to preserve multiple [[copies]], consider setting this to "REDUCED_REDUNDANCY"
to save money.
* `host` and `port` - Specify in order to use a different, S3 compatable
service.
* `bucket` - S3 requires that buckets have a globally unique name,
so by default, a bucket name is chosen based on the remote name
and UUID. This can be specified to pick a bucket name.
* `fileprefix` - By default, git-annex places files in a tree rooted at the
top of the S3 bucket. When this is set, it's prefixed to the filenames
used. For example, you could set it to "foo/" in one special remote,
and to "bar/" in another special remote, and both special remotes could
then use the same bucket.
* `x-amz-*` are passed through as http headers when storing keys
in S3.
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