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CTDB (Clustered TDB) is an extension of TDB(Trivial Database) used by Samba to store temporary data. One of the challenges to realize the clustered Samba filesystem was to distribute meta-data across servers in a scalable way. CTDB was created by Andrew Tridge, the author of Samba, for this purpose. It has been extended to provide additional features such as IP failover, and now can be used with GlusterFS. In this session, I will explain concrete steps to design and build scalable and high available Samba/NFS file server using GlusterFS and CTDB.