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Eliminating the Bandwidth Bottleneck of Central Query Dispatching Through TCP Connection Hand-Over

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dc.contributor.authorKlauck, Stefan
dc.contributor.authorPlauth, Max
dc.contributor.authorKnebel, Sven
dc.contributor.authorStrobl, Marius
dc.contributor.authorSantry, Douglas
dc.contributor.authorEggert, Lars
dc.contributor.editorGrust, Torsten
dc.contributor.editorNaumann, Felix
dc.contributor.editorBöhm, Alexander
dc.contributor.editorLehner, Wolfgang
dc.contributor.editorHärder, Theo
dc.contributor.editorRahm, Erhard
dc.contributor.editorHeuer, Andreas
dc.contributor.editorKlettke, Meike
dc.contributor.editorMeyer, Holger
dc.date.accessioned2019-04-11T07:21:39Z
dc.date.available2019-04-11T07:21:39Z
dc.date.issued2019
dc.description.abstractIn scale-out database architectures, client queries must be routed to individual backend database servers for processing. In dynamic database systems, where backend servers join and leave a cluster or data partitions move between servers, clients do not know which server to send queries to. Using a central dispatcher, all queries and responses are routed via a single node. In a system with many high-performance backends, such a central node can become the system bottleneck. This paper compares three different approaches for query dispatching in terms of scaling network throughput and processing flexibility. Off-the-shelf TCP/HTTP load-balancers cannot dispatch individual queries arriving over a single connection to different backend servers, unless they are extended to understand the database wire protocol. For small response sizes up to 4 KB, a purpose-built query dispatcher delivers the highest throughput. For larger responses (i.e., BLOBs or data sets for external analysis), a novel approach for network proxying that transparently maps TCP connections between backend servers performs best.We propose hybrid query dispatching that performs a TCP connection hand-over on demand when returning large database results.en
dc.identifier.doi10.18420/btw2019-07
dc.identifier.isbn978-3-88579-683-1
dc.identifier.pissn1617-5468
dc.identifier.urihttps://dl.gi.de/handle/20.500.12116/21737
dc.language.isoen
dc.publisherGesellschaft für Informatik, Bonn
dc.relation.ispartofBTW 2019
dc.relation.ispartofseriesLecture Notes in Informatics (LNI) – Proceedings, Volume P-289
dc.subjectScale-Out Database Systems
dc.subjectQuery Dispatching
dc.subjectLoad-Balancing
dc.titleEliminating the Bandwidth Bottleneck of Central Query Dispatching Through TCP Connection Hand-Overen
gi.citation.endPage106
gi.citation.startPage97
gi.conference.date4.-8. März 2019
gi.conference.locationRostock
gi.conference.sessiontitleWissenschaftliche Beiträge

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P289 - BTW2019 - Datenbanksysteme für Business, Technologie und Web