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File Systems

  • Coda is a distributed filesystem with its origin in AFS2. It has many features that are very desirable for network filesystems.
  • InterMezzo is a new distributed file system with a focus on high availability. InterMezzo will be suitable for replication of servers, mobile computing, managing system software on large clusters, and for maintenance of high availability clusters.
  • Lustre is a scalable, secure, robust, highly-available cluster file system. It is designed, developed and maintained by Cluster File Systems, Inc.


  • DRBD is a block device which is designed to build high availability clusters. This is done by mirroring a whole block device via (a dedicated) network. You could see it as a network raid-1.

Volume Managers

  • LVM (Logical Volume Manager) allows you to create file systems spanning multiple disks, create and manage large filesystems, extend and shrink online file systems, move data physically from one disk to another without changing the position in the file tree, and much more.
  • LVM2 is the successor of LVM.



  • Ethereal - An excellent network analysis tool for troubleshooting, analysis, software and protocol development, and education.