Abstract
We propose a distributed storage system which relocates data blocks autonomously among the storage nodes. In order to optimize I/O performance with slight administrative workload, our system is aimed at the realization of the following two functions; (i) Run-time construction of the storage tiers from the heterogeneous storage devices, and (ii) Automated block migration among the tiers. We also show a technique to reduce management traffic in iSCSI environment.
Highlights
Even a client computer has enough storage space owing to inexpensive mass storage devices
After that the server node shares the logical storage for client nodes with iSCSI.[9] iSCSI is one of the major protocol to use in storage area network (SAN)
We proposed a distributed storage system which provides an automated block migration mechanism
Summary
Even a client computer has enough storage space owing to inexpensive mass storage devices In small organizations such as a small office or a laboratory in a university, a client computer is used for various tasks as a single node, and it is often not configured to cooperate with other client computers. The data files which are seldom accessed by the user in spite of locating on the high performance storage should be migrated to another storage device This relocation task is a heavy burden on the administrators because file access pattern and storage workload are dynamically changed. If they statically decide the location of a file and never relocate it, the system may not be able to utilize the potential performance of the storage devices. We propose a distributed storage system which migrates file data blocks into the suitable storage device for their access pattern
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