Many researches compare the storage performance of different virtualised systems. Some of their results are unexplained, which reduces the reliability of the storage performance comparison itself. Through experiments, this reported work identifies that the size of buffer cache significantly affects the storage performance. When the same size of buffer cache is used in experiments, very differen...

Prior works, for estimating the number of pages (blocks) accessed from secondary memory to retrieve a certain number of records for a query, have ignored the effect of main memory buffer size. While this may not cause any adverse impact for special cases, in most cases the impact of buffer sizes will be to increase the number of page accesses. This paper describes the reasons for the impact due...

Heterogeneous devices have been adopted widely in mobile storage systems because a combination of such devices can supply a synergistically useful storage solution by taking advantage of each device. In heterogeneous storage systems there have been several researches for enhancing I/O performance by devising proper buffer cache management algorithms. This paper presents a novel device-aware buf...

Storage management is important to the performance of DBMS. This paper gives a comprehensive overview of storage management in relational DBMS. The storage management is divided into three levels (logical, physical in-memory, and physical on-disk) and discussed separately. The logical level caches logical units (tuples or index values) of the DBMS based on the logical information to improve buf...

Database Management Systems (DBMSs) use a main memory area as a buffer to reduce the number of disk accesses performed by a transaction. DB2 Universal Database divides the buffer area into a number of independent buffer pools and each database object (table or index) is assigned to a specific buffer pool. The tasks of configuring the buffer pools, which defines the mapping of database objects t...

Storage management is an important part of DB2. The buffer pool in DB2 is used to catch the disk pages of the database, and its management algorithm can significantly affect performance. Because of the complexity of DB2 and the workloads running on it, the buffer pool management algorithm is hard to study, config, and tune. In order to investigate the buffer pool management algorithm under cont...

The output speed of a high-resolution camera with fast frame rate is high, reaching 800 MB/s or even more. Consequently, the abundant data recorded can easily cause overflow during transmission and loss storage. To address this problem while achieving reliable acquisition rates, herein, we design high-speed video adaptive storage method based on link protocol. system uses protocol cameras for a...

This presentation aims to describe a method to use a Object-based Storage Device (OSD) Cloud Storage system based on p2p network distributed files as a block level storage system with iSCSI protocol. This coupling of designs allows the user to take advantage of the replication, reliability, scalability and large storage capacity of a Cloud Computing provider without the need for specific or ded...