Motivation

sqlfs is a POSIX compliant inode table to be used as fuse binding engine. Inode table is store in a very simple sqlite file.

sqlfs is the underlying inode table that support the cloudfs project.

Main features

• Simple by design
• Available on all platforms (linux & Windows)
• Very fast (sqlite is actually fastest than most file system)
• Strongly tested
• sqlfs load the whole inode table in memory and use about 1k per file of inode data. So having 100k file will use at least 100MB of memory.

Supported API

sqlfs support most of the fuse API (appart for file body access - open, release, read, write - see cloudfs for this part)

• gettattr
• mkdir
• readdir
• rename
• rmdir
• statfs
• unlink
• utimens
• create

Helpers

• touch
• mkdirp
• rmrf

inode table design

| file_uid | file_name | parent_uid | file_mode | file_size | block_hash | file_ctime | file_mtime | | --- | --- | --- | --- | --- | --- | --- | --- | | (someguid) | usr | (someotherguid) | S_IFDIR | 0o777 | 0 | null | 1560000505 | 1560000505 | | (someguid) | "foo" | (someotherguid) | S_IFREG | 0o666 | 2323 | (file md5) | 1560000505 | 1560000505 |

Credits

• 131 - author
• mafintosh' fuse-bindings