CloudTieringFS: Policy-Driven Multi-Tier File System

The daemon and the shared library that together enable support of tiering between a POSIX-compliant file system (local or distributed) and a cloud object storage at the file level while maintaining the POSIX semantics.

Documentation

A very detailed description of the CloudTieringFS is given in Sergey Morozov's Master's Thesis.

Installation

To start daemon run:

$> sudo S3_ACCESS_KEY_ID='<access-key-id>' \
        S3_SECRET_ACCESS_KEY='<secret-access-key>' \
   $PWD/bin/cloudtiering-daemon $PWD/conf/cloudtiering.conf

Set LD_PRELOAD variable globally

$> export LD_PRELOAD=$PWD/bin/libcloudtiering.so
$> <executable>

or individually, per process

$> LD_PRELOAD=$PWD/bin/libcloudtiering.so <executable>

Dependencies

Below is a list of tools and libraries that should be installed on the system in order to enable code compilation. This list may be incomplete.

• s3 shared library (openSUSE 42.2: libs3-2, libs3-devel);
• dotconf shared library (openSUSE 42.2: dotconf, dotconf-devel);
• libattr shared library (openSUSE 42.2: libattr-devel);
• gcc5 compiler (openSUSE 42.2: gcc5);
• proc file system should be present on the system.

Licensing

CloudTieringFS is licensed under the GNU General Public License, Version 3.