| 摘要 |
<p>New In-Memory Data Bases (IMDBs) are growing in memory capacities and there is a marked increase in number of cores and CPUs on modern single-server-board hardware. The magnetic hard disks (HDD) are the accepted industry standard for storage of data. Some of the recent designs are even using solid-state-drive (SSD) because of their hard durability in addition to HDD. Here we foresee the usage of persistent medium like NOR and NAND FLASH EEPROMs on Memory bus of processor directly, which shorten the iatency and throughput gap between total main memory and 'HDD, SSD or Flash Storage'. We see the drastic difference in access times of EEPROMs (up to 350 nanoseconds (read)) compared to SSD (up to 250,000 nanoseconds) and further compared to traditional storage like hard drives (up to 15 million nanoseconds); when compared to RAM (up to 100 nanoseconds). This low latency of reading access of NOR and NAND FLASH EEPROM, which is comparable to RAM, makes ideal for making IMDBs superfast, as there is no dependency on slow media like HDD and SSD. Additionally the same technology can be used for making any server superfast, that is, usage of persistent medium like NOR and NAND FLASH EEPROMs, along with RAM for any specific server and using SSD or HDD for backups. Here NOR and NAND FLASH EEPROMs are used for holding all application programs and system programs. The operating system software like UNIX, Linux, Windows or OS X needs to be changed suitably. To summarize, with this NOR and NAND FLASH EEPROMS approach there will be two or more generic conceptual appliances (Hardware + Software combined machines) that will be realized with this methodology. To illustrate we will show two approaches in the following. 1. Specific to IMDBs. 2. Specific to servers to make them superfast. 3. There are many other appliances that are possible which we are not discussing here.</p> |
