s3backer

FUSE and NBD single file backing store via Amazon S3

s3backer is a filesystem that contains a single file backed by the Amazon Simple Storage Service (Amazon S3). As a filesystem, it is very simple: it provides a single normal file having a fixed size. Underneath, the file is divided up into blocks, and the content of each block is stored in a unique Amazon S3 object. In other words, what s3backer provides is really more like an S3-backed virtual hard disk device, rather than a filesystem. In typical usage, a `normal' filesystem is mounted on top of the file exported by the s3backer filesystem using a loopback mount (or disk image mount on Mac OS X). s3backer can also function as a Network Block Device (NBD) plug-in.