Renu Tewari, Richard P. King, Dilip D. Kandlur, and John Wilkes. Placement of multimedia blocks on zoned disks. In Proceedings of IS&T/SPIE Conference on Multimedia Computing and Networking (MMCN), San Jose, CA, USA, January 1996.  Home/Search   Document Details and Download   Summary   Related Articles   Check

....of the disks within this parity group to reconstruct the lost data. Thus, the load on all operational disks increases by 100 under failure, making this parity group a hot spot for the entire system. To distribute the additional load more evenly, parity groups may be rotated such that they overlap [15]. Further improvements can be achieved by assigning blocks pseudo randomly to parity groups [16] To provide a fo cused presentation we will concentrate on the simple scenario of non overlapping parity groups. When the logical disks that were created with the disk merging technique are assigned ....

R. Tewari, R. P. King, D. Kandlur, and D. M. Dias, "Place- ment of Multimedia Blocks on Zoned Disks," in Proceedings of ISFJT/SPIE Multimedia Computing and Networking, San Jose, January 1996.

....in this paper. Random placement (RP) This simple technique assigns blocks to the zones in a random man ner. Maximizing throughput placement (MTP) Several studies attempted to minimize the average disk service time ( by assigning large blocks with a high frequency of access to faster zones [7, 19]. MTP sorts blocks based on their size and frequency of access (Fix Bi for each block i) Next, blocks are assigned to the zones sequentially starting with the fastest zone. Block i with the highest Fix Bi value is assigned to the fastest zone. Minimizing variance placement (MVP) The objective ....

R. Tewari, R. King, D. Kandlur, and D.M. Dias. Placement of multimedia blocks on zoned disks. In Proceedings of Multimedia Computing and Networking, Jan. 1996.

....that only a few possible technologies have been modeled. There are existing disk technologies which are not covered by the above modeling efforts. As an example, we mention the zoned magnetic, ZCAV, disks. These disks have dominated, due to their higher storage capacities and transfer rates ([1, 9, 12, 13, 14, 19]) Another example, also recently produced, is the Hitachi CAV CLV CD ROM 12 16X ( 2] which behaves as a CAV optical disk when reading from the innermost half part with a speed varying from 8X to 16X, and as a CLV disk when reading from the outermost part with a speed of 16X) Thus, ....

Renu Tewari, Richard P. King, Dilip Kandlur, and Daniel Dias, "Placement of Multimedia Blocks on Zoned Disks", IS&T/SPIE Conference on Multimedia Computing and Networking (MMCN'96), San Jose, California, January 1996.

....group size. Since the optimal block size varies across zones, a multimedia server can: i) choose an optimal block size for each zone, or (ii) choose a single block size for all zones. Recently several placement policies that employ different block sizes for different zones have been proposed [20, 21]. Our models enable us to parameterize these policies by choosing an appropriate block size for each zone. Since use of a single block size for all zones can cause an increase in the service time of the most heavily loaded disk, a multimedia server must choose a block size that minimizes this ....

R. Tewari, R P. King, D. Kandlur, and D. Dias. Placement of Multimedia Blocks on Zoned Disks. In Proceedings of ACM/SPIE Multimedia Computing and Networking (MMCN'96), San Jose, January 1996.

....the disks within this parity group to reconstruct the lost data. Thus, the load on all operational disks increases by 100 under failure, making this parity group a hot spot for the entire system. To distribute the additional load more evenly, parity groups may be rotated such that they overlap [TKKD96] Further improvements can be achieved by assigning blocks pseudo randomly to parity groups [ORSS96] To provide a focused presentation we will concentrate on the simple scenario of non overlapping parity groups. When the logical disks that were created with the disk merging technique are ....

R. Tewari, R. P. King, D. Kandlur, and D. M. Dias. Placement of Multimedia Blocks on Zoned Disks. In Proceedings of IS&T/SPIE Multimedia Computing and Networking, San Jose, January 1996.

.... in [NMW97] Studies of the performance impact of multi zone disks on continuous data servers, on the other hand, have focused on data placement issues, namely, the layout of constant bandwidth data objects across zones [Bir95, GKS96] and the generalization of organ pipe like arrangements [TKKD96, TCG96b]. The rest of the paper is organized as follows. Section 2 introduces our system architecture. Section 3 develops an analytic model for predicting the glitch probability. In Section 4, the approach is validated by comparing the analytic results to simulation studies. Section 5 discusses some ....

....is uniformly distrib uted over all sectors of the disk. More advanced placement schemes with information about access frequencies should employ a general ized organ pipe permutation [Won83] storing the hottest data at an optimal point somewhere between the middle and the outermost track [TKKD96, TCG96b], to find the best compromise between short seeks and high bandwidth. Taking such placement optimizations into consideration is left for future work. Note that we assume the bandwidth requirements of all requests to be less than the band width of the innermost zone, such that any data can be ....

Renu Tewari, Richard P. King, Dilip Kandlur, Daniel Dias, Placement of Multimedia Blocks on Zoned Disks, IS&T/SPIE Conference on Multimedia Computing and Networking(MMCN'96), San Jose, California, January 1996.

No context found.

Renu Tewari, Richard P. King, Dilip D. Kandlur, and John Wilkes. Placement of multimedia blocks on zoned disks. In Proceedings of IS&T/SPIE Conference on Multimedia Computing and Networking (MMCN), San Jose, CA, USA, January 1996.

No context found.

Renu Tewari, Richard King, Dilip Kandlur, and Daniel M. Dias, "Placement of Multimedia Blocks on Zoned Disks," in Multimedia Computing and Networking, January 1996.

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