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Recently, a new buffer and storage management strategy called In-Page Logging (IPL) has been proposed for database systems based on flash memory. Its main objective is to overcome the limitations of flash memory such as erase-before-write and asymmetric read/write speeds by storing changes made to a data page in a form of log records without overwriting the data page itself. Since it maintains a series...
In this paper, we introduce an effective method of ontology data management on flash memory based SSD. Ontology is the concept to manage semantic Web data. However, ontology is used not only in semantic web but also in life sciences, intelligence and CRM/ERP nowadays. Adapting ontology concept on these field, ontology have been managing large amount of data. Therefore, we suggest the effective method...
Hash join is one of important operations in database system, and its performance may slow down because of disk I/O in hash table overflow phenomenon. In that phenomenon, the more overflow of hash table occurs, the more disk I/O arise, so join performance go from bad to worse. Dominant disk I/O patterns of hash join are sequential writes and random reads, then flash memory SSD is in a more advantageous...
For the past decade, numerous methods have been proposed for the design of a flash translation layer (FTL), which is the core engine of flash memory drives that critically determines the performance of the drives. In this paper, we revisit one of the popular FTL schemes called FAST, and augment it with new optimization techniques aiming particularly at online transaction processing (OLTP) workloads...
Flash memory has many advantages such as high performance, low electronic power, non-volatile storage and physical stability, over hard-disks. For this reason, flash memory has been deployed as data storage for mobile devices, including PDAs, MP3 players, laptop-computers and database systems. According to the cell type, flash memory can be divided into SLC(Single Level Chip) and MLC(Multi Level Chip)...
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