Skip to Main content Skip to Navigation
Conference papers

Whittle Index Policy for Crawling Ephemeral Content

Abstract : We consider the task of scheduling a crawler to retrieve from several sites their ephemeral content. This is content, such as news or posts at social network groups, for which a user typically loses interest after some days or hours. Thus development of a timely crawling policy for ephemeral information sources is very important. We first formulate this problem as an optimal control problem with average reward. The reward can be measured in terms of the number of clicks or relevant search requests. The problem in its exact formulation suffers from the curse of dimensionality and quickly becomes intractable even with moderate number of information sources. Fortunately, this problem admits a Whittle index, a celebrated heuristics which leads to problem decomposition and to a very simple and efficient crawling policy. We derive the Whittle index and provide its theoretical justification.
Document type :
Conference papers
Complete list of metadata

Cited literature [27 references]  Display  Hide  Download

https://hal.inria.fr/hal-01258647
Contributor : Konstantin Avrachenkov <>
Submitted on : Tuesday, January 19, 2016 - 12:23:21 PM
Last modification on : Wednesday, October 14, 2020 - 3:57:38 AM
Long-term archiving on: : Wednesday, April 20, 2016 - 12:20:05 PM

File

CDC15root.pdf
Files produced by the author(s)

Identifiers

  • HAL Id : hal-01258647, version 1

Collections

Citation

Konstantin Avrachenkov, Vivek Borkar. Whittle Index Policy for Crawling Ephemeral Content. IEEE 54th Annual Conference on Decision and Control (CDC), Dec 2015, Osaka, Japan. ⟨hal-01258647⟩

Share

Metrics

Record views

287

Files downloads

293