If you are new to a Gfarm file system, it's recommended that you read the documents in the following order:
README.en (in English) README.ja (in Japanese) This file.
LICENSE (in English) The License for Gfarm.
RELNOTES (in English) This document describes the differences in each version.
OVERVIEW.en (in English) OVERVIEW.ja (in Japanese) This document introduces an overview of Gfarm and its terminology.
INSTALL.en (in English) INSTALL.ja (in Japanese) This document describes how to install Gfarm from the source code.
INSTALL.RPM.en (in English) INSTALL.RPM.ja (in Japanese) This document describes how to install Gfarm from the RPM binary packages that are used in RedHat Linux, Fedora Core, CentOS, etc.
INSTALL.Debian.en (in English) INSTALL.Debian.ja (in Japanese) This document describes how to install Gfarm from the Debian binary packages that are used in Debian and Ubuntu.
SETUP.en (in English) SETUP.ja (in Japanese) This document describes how to setup a Gfarm file system.
SETUP.private.en (in English) SETUP.private.ja (in Japanese) This document describes how to setup a private Gfarm file system by a non-privileged user instead of the root privilege. Note that only the user can use Gfarm in this case, thus it's recommended to use SETUP.en / SETUP.ja usually.
KNOWN_PROBLEMS.en (in English) KNOWN_PROBLEMS.ja (in Japanese) This document describes known problems with Gfarm.
Gfarm-FAQ.en (in English) Gfarm-FAQ.ja (in Japanese) This document describes frequently asked questions and answers.
Reference manual in both HTML and UNIX manpage format. (both English and Japanese)
User's manual in HTML format. (both English and Japanese)
Please see http://oss-tsukuba.org/en/software/gfarm as well.