Rate-based randomized routing in large heterogeneous processor sharing systems
Why this work is in the frame
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Bibliographic record
Abstract
Randomized load balancing techniques are effective solutions to reduce mean waiting time of jobs in large web server farms, where obtaining state information of all the servers becomes costly. The classical power-of-two routing scheme, which has already been analyzed for systems of identical servers, requires the instantaneous state information of two randomly selected servers at each job-arrival instant. In this paper, we consider variants of the classical power-of-two scheme for multiserver systems where the servers may have different service rates. We modify the classical power-of-two scheme for the heterogeneous system so that it now incorporates server speeds into the criterion for server selection. We analytically characterize the stability region, stationary load distribution, and the mean sojourn time of jobs of this modified scheme. It is shown that, in the heterogeneous case, the stability region of the modified scheme may be a subset of the maximum achievable stability region. To improve the stability region, we propose and analyze another scheme which combines the power-of-two routing scheme with randomized state independent routing scheme. We show that this new scheme achieves the maximum stability region and results in the least mean sojourn time of jobs among all the schemes considered in the paper.
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Full frame distilled prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. Learned from the 10,348 direct Codex labels and 10,348 direct Gemma labels. Candidate is the union of thresholded teacher heads; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels or direct frontier model labels.
Codex and Gemma teacher scores by category
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.004 | 0.001 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.001 | 0.000 |
| Bibliometrics | 0.000 | 0.001 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.001 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.000 | 0.000 |
Machine scores (provisional)
The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.
Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.
score_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from it