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Title: | Weaker Forms of Monotonicity for Declarative Networking: a more fine-grained answer to the CALM-conjecture | Authors: | AMELOOT, Tom KETSMAN, Bas NEVEN, Frank Zinn, Daniel |
Issue Date: | 2014 | Publisher: | ASSOC COMPUTING MACHINERY | Source: | Proceedings of the 33rd ACM Symposium on Principles of Database Systems | Abstract: | The CALM-conjecture, first stated by Hellerstein [23] and proved in its revised form by Ameloot et al. [13] within the framework of relational transducer networks, asserts that a query has a coordination-free execution strategy if and only if the query is monotone. Zinn et al. [32] extended the framework of relational transducer networks to allow for specific data distribution strategies and showed that the nonmonotone win-move query is coordination-free for domainguided data distributions. In this paper, we complete the story by equating increasingly larger classes of coordinationfree computations with increasingly weaker forms of monotonicity and make Datalog variants explicit that capture each of these classes. One such fragment is based on stratified Datalog where rules are required to be connected with the exception of the last stratum. In addition, we characterize coordination-freeness as those computations that do not require knowledge about all other nodes in the network, and therefore, can not globally coordinate. The results in this paper can be interpreted as a more fine-grained answer to the CALM-conjecture. | Notes: | Neven, F (reprint author), Hasselt Univ, Comp Sci, Hasselt, Belgium. frank.neven@uhasselt.be | Keywords: | distributed database; relational transducer; consistency; coordination; expressive power; cloud programming | Document URI: | http://hdl.handle.net/1942/16393 | ISBN: | 9781450320665 | DOI: | 10.1145/2594538.2594541 | ISI #: | 000450809200006 | Rights: | Copyright 2014 ACM 978-1-4503-2375-8/14/06 ...$15.00 | Category: | C1 | Type: | Proceedings Paper | Validations: | ecoom 2019 |
Appears in Collections: | Research publications |
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