We present an algorithm for efficient processing of set-containment joins in main memory. Our algorithm uses an index structure based on inverted files. We focus on improving performance of the algorithm in a main-memory environment by utilizing the L2 CPU cache more efficiently. To achieve this, we employ some optimizations including partitioning the inverted lists and compressing the intermed...

GWAC will have been built an integrated FOV of 5,000 degree2 and already 1,800 square degree2. The limit magnitude a 10-second exposure image in the moonless night is 16R. In each observation night, produces about 0.7TB raw data, data processing pipeline generates millions single frame alerts. We describe Data Processing Management System (GPMS), including hardware architecture, database, detec...

The data acquisition system for the SLD detector will make extensive use of parallel processing at the front-end level. Fastbus acquisition modules are being built with powerful processing capabilities for calibration, data reduction and further pre-processing of the large amount of analog data handled by each module. This paper describes the read-out electronics chain and data pre-processing s...

Secure and efficient network virtualization is a key building block for virtualized environments such as data centers or enterprise networks. While machine virtualization alone provides immediate isolation of computing resources such as memory and CPU between guest domains, the network remains to be a shared resource as all traffic from guests eventually pass through a shared network resource a...

As a test of quenched lattice twisted mass QCD, we compute the non-perturbatively O(a) improved pseudoscalar and vector meson masses and the pseudoscalar decay constant down to MPS/MV = 0.467(13) at β = 6 in large volume. We check the absence of exceptional configurations and – by further data at β = 6.2 – the size of scaling violations. The CPU time cost for reaching a given accuracy is close ...