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Monterey, California
Apr. 11, 2005 to Apr. 14, 2005
ISBN: 0-7695-2318-8
pp: 218-223
Lin Qiao , University of California, Santa Barbara
Balakrishna R. Iyer , IBM Silicon Valley Lab
Divyakant Agrawal , University of California, Santa Barbara
Amr El Abbadi , University of California, Santa Barbara
Sandeep Uttamchandani , IBM Almaden Research Center
This paper proposes STORAGEDB: a paradigm for implementing storage virtualation using databases. It describes details for storing the logical-to-physical mapping information as tables within the database; handling the incoming I/O requests of the application as database queries; bookkeeping of the I/O operations as database transactions. In addition, STORAGEDB uses built-in DBMS features to support storage virtualization functionalities; as an example we describe how online table space migration can be used to support reallocation of logical disks. Finally, we describe our modifications to a traditional RDBMS implementation, in order to make it light-weight. Improving the performance of a traditional DBMS is critical for the acceptance of STORAGEDB since the performace overheads are considered a primary challenge in replacing existing storage virtualization engines. Our current lightweight RDBMS has a 19 times shorter invocation path length than the original. In comparision to the open-source virtualization software, namely LVM, the extra cost of STORAGEDB is within 20% of LVM in trace-driven tests. (unlike STORAGEDB, LVMdid not have logging overhead). We consider these initial results as the "stepping stone" in the paradigm of applying databases for storage virtualization.
Lin Qiao, Balakrishna R. Iyer, Divyakant Agrawal, Amr El Abbadi, Sandeep Uttamchandani, "STORAGEDB: Enhancing the Storage Sub-System with DBMS Functionalities", MSST, 2005, Mass Storage Systems and Technologies, IEEE / NASA Goddard Conference on, Mass Storage Systems and Technologies, IEEE / NASA Goddard Conference on 2005, pp. 218-223, doi:10.1109/MSST.2005.34
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