The article deals the main approaches to analysis of war memory, that established in Russian and foreign academic researches. It is made an attempt classify these approaches, criteria highlighting a central actor, translating images past, or recognition plurality such actors. showed specificities state non-state actors articulation memory. As result, it highlighted state-centred approach, popul...

one of the most important items for better file system performance is efficient buffering of disk blocks in main memory. efficient buffering helps to reduce the widespeed gap between main memory and hard disks. in this buffering system, the block replacement policy is one of the most important design decisions that determines which disk block should be replaced when the buffer is full. to overc...

In this paper, we describe a main memory hybrid database system called HYRISE, which automatically partitions tables into vertical partitions of varying widths depending on how the columns of the table are accessed. For columns accessed as a part of analytical queries (e.g., via sequential scans), narrow partitions perform better, because, when scanning a single column, cache locality is improv...

Storing all database data in memory is an idea that many researchers have been studying it from mid-1980s when RAM prices decreased while their capacity increased. Main Memory Database systems (MMDB) are an efficient solution to store all database data in main physical memory. Conventional database systems like relational databases are optimized for disk I/O operations but Memory resident datab...

Emerging non-volatile main memory (NVMM) unlocks the performance potential of applications by storing persistent data in the main memory. Such applications require a lightweight persistent transactional memory (PTM) system, instead of a heavyweight filesystem or database, to have fast access to data. In a PTM system, the memory usage, both capacity and bandwidth, plays a key role in dictating p...

Recently, to efficiently support the real-time requirements of RTLS( Real Time Location System) services, interest in the main memory DBMS is rising. In the main memory DBMS, because all data can be lost when the system failure happens, the recovery method is very important for the stability of the database. Especially, disk I/O in executing the log and the checkpoint becomes the bottleneck of ...

The memory system is a fundamental performance and energy bottleneck in almost all computing systems. Recent system design, application, and technology trends that require more capacity, bandwidth, efficiency, and predictability out of the memory system make it an even more important system bottleneck. At the same time, DRAM technology is experiencing difficult technology scaling challenges tha...

Current data models like the NF 2 model and object-oriented models support set-valued attributes. Hence, it becomes possible to have join predicates based on set comparison. This paper introduces and evaluates two main memory algorithms to evaluate eeciently this kind of join. More speciically, we concentrate on subset predicates.