I/O analysis is an essential task for improving the performance of scientific applications on high-performance computing (HPC) systems. However, current analysis tools, which often use data drilling techniques (iterative exploration for deeper insights), ...

In flash-based solid-state drives (SSDs), certain small unaligned I/O requests span two logical pages though their size is not larger than the basic write/read unit of SSDs (i.e. an SSD page), and we term them as across-page requests. Servicing such ...

Modern high density SSDs commonly designate a part of their capacity as a cache using an Single-level Cell (SLC)-mode region. Partial programming is then adopted for reducing space fragmentation in the SLC-mode pages, but it exacerbates program disturb ...

Parity based RAID suffers from poor small write performance due to heavy parity update overhead. The recently proposed method EPLOG constructs a new stripe with updated data chunks without updating old parity chunks. However, due to skewness of data ...

Tradespace analysis is an important part of design and modeling simulations in the military, in which thousands of design parameters are made available for detecting potential areas for performance enhancement in expensive equipment such as combat and ...

Virtualization is the foundation for cloud computing, and the virtualization can not be achieved without software defined, elastic, flexible and scalable virtual layers. Unfortunately, if multiple virtual storage devices are chained together, the system ...

Retrieving sequential rich media content from modern commodity disks is a challenging task. As disk capacity increases, there is a need to increase the number of streams that are allocated to each disk. However, when multiple streams are accessing a ...