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CLSF (China Linux Storage & File System Workshop) is an effort to make local Linux kernel hackers get together to share and exchange ideas. CLSF is an invitation only workshop, in order to have effective communication, only a small group of people will be invited. Most of the invitees are active upstream Linux kernel developers locally from China, focus on I/O and storage sub-systems.
CLSF 2014 was hold in office of XiaoMi which is a famous consumer electronics company in china. Participators are mainly from Huawei, Fujitsu, Intel, Alibaba and other companies.
The first topic lead by Jiufei Xue from Huawei is about ocfs2. Huawei was building their private cloud product on ocfs2, so in recent two years the kernel developers in Huawei commited many fix patches and new features into ocfs2 community. In this year, they add range lock into ocfs2, so users could not only lock the whole file but a specific range of one file, which will promote the performance in cluster when many clients read/write files at the same time.