Many kinds of information, e.g., addresses, crawls of webpages, or academic affiliations, are prone to becoming outdated over time. In order to show the efficacy and the accuracy of the proposed approach, the results obtained from the analytical model is validated with the results obtained from the simulations. Second and foremost, the relationship between the number of nodes and the number of repairmen is presented with an optimization analysis for large-scale systems.
The analytical model and solution presented here are capable of considering large number of nodes up to thousands and able to incorporate availability issues of the system. First, a generic approximate solution approach is adapted and developed for performability modelling which considers performance and availability issues of large number of nodes with multi-repairmen. The key contribution of this paper is twofold. In this paper, analytical modelling and optimization analysis are presented for large-scale systems. This leads to developing and designing analytical models to understand and predict of complex system behaviour in order to ensure availability of large-scale systems. However, the practical large-scale systems result in unpredictable, fault-tolerant, often detrimental outcomes.
DISK ARCHIVE SOFTWARE
“The combined value proposition that the two companies offer is convincing and powerful, replacing the traditional data tape library with ALTO to deliver a fully secure tapeless workflow with superior performance, high availability and much lower total cost of ownership integrated with the best in IT-based software playout.The large-scale communication systems and computer networks provide flexible, efficient, and highly available services to their users.
DISK ARCHIVE ARCHIVE
“We are delighted to combine the benefits of the ALTO Content Library with that of the OASYS Player through our strategic alliance with OASYS,” states Alan Hoggarth, CEO at Disk Archive Corporation. OASYS Media Manager manages the movement of media files to the OASYS Player servers as demanded by each channel’s schedule. The OASYS Media Library indexes all the content stored on the ALTO, creating a metadata XML for each media file. The ALTO Content Library is used by OASYS as the central shared storage between OASYS Player servers. It provides an ideal archive for transmission-ready content in multi-channel playout environments supporting removable media for vault storage, media transportation and disaster recovery. The result is a cost-effective alternative to a data tape library with fast access, no planned maintenance and higher security than simple RAID storage. Any individual disk which is not reading or writing is switched off, saving power and greatly extending disk life. Forming a strategic alliance with Disk Archive Corporation allows us to offer our clients a modern, scalable and reliable media archiving solution for their playout facility that is fully integrated with our playout solutions.”ĪLTO is based on a variant of the MAID architecture with totally independent control of each disk in a densely packed array of affordable “green” drives which are designed to support spin-down operation. “As our clients scale-up the number of channels they playout using OASYS Player, and build larger and larger catalogues of media, so the need for a cost-effective, media archive managed solution has grown. “At OASYS we believe in pioneering innovative and reliable solutions to meet our clients’ specific playout needs,” says Fraser Jardine, VP global sales at OASYS. OASYS Automated Playout Limited, a supplier of IT-based automation playout software, has formed a strategic alliance with Disk Archive Corporation, a provider of disk based archive solutions.
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