A FUSE file system with an internal dedicated page cache that only flushes data if explicitly requested by the application. This is useful for simulat

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2024-09-05 12:00:13

A FUSE file system with an internal dedicated page cache that only flushes data if explicitly requested by the application. This is useful for simulating power failures and losing all unsynced data.

LazyFS was tested with ext4 (with the default mount options) as the underlying file system (FUSE backend), in both Debian 11 (bullseye) and Ubuntu 20.04 (focal) environment. It is C++17 compliant and requires the following packages to be installed:

FUSE requires the option allow_other as a startup argument so that other users can read and write files, besides the user owning the file system. For that, you must uncomment/add the following line on the configuration file /etc/fuse.conf:

I recommend following the simple cache configuration (indicating the cache size and using a similar configuration file as default.toml), since it's currently the most tested schema in our experiments. Additionally, for the section [cache], you can specify the following:

[cache.simple] or [cache.manual]: To setup the cache size and internal organization. For now, you could just follow the example using the custom_size in (Gb/Mb/Kb) and the number of blocks in each page (you can just leave 1 as default). For manual configurations, comment out the simple configuration and uncoment/change the example above to suit your needs.