The full story of 1000 cores

In our initial DaMoN paper, we set out the goal to revisit the results of “Starring into the Abyss [...] of Concurrency Control with [1000] Cores” (Yu in Proc. VLDB Endow 8: 209-220, 2014). Against their assumption, today we do not see single-socket CPUs with 1000 cores. Instead, multi-socket hardwa...

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Bibliographic Details
Published in:The VLDB journal Vol. 31; no. 6; pp. 1185 - 1213
Main Authors: Bang Tiemo, May, Norman, Petrov Ilia, Binnig Carsten
Format: Journal Article
Language:English
Published: New York Springer Nature B.V 01.01.2022
Subjects:
Concurrency
Concurrency control
Hardware
Sockets
ISSN:1066-8888, 0949-877X
Online Access:Get full text
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Summary:In our initial DaMoN paper, we set out the goal to revisit the results of “Starring into the Abyss [...] of Concurrency Control with [1000] Cores” (Yu in Proc. VLDB Endow 8: 209-220, 2014). Against their assumption, today we do not see single-socket CPUs with 1000 cores. Instead, multi-socket hardware is prevalent today and in fact offers over 1000 cores. Hence, we evaluated concurrency control (CC) schemes on a real (Intel-based) multi-socket platform. To our surprise, we made interesting findings opposing results of the original analysis that we discussed in our initial DaMoN paper. In this paper, we further broaden our analysis, detailing the effect of hardware and workload characteristics via additional real hardware platforms (IBM Power8 and 9) and the full TPC-C transaction mix. Among others, we identified clear connections between the performance of the CC schemes and hardware characteristics, especially concerning NUMA and CPU cache. Overall, we conclude that no CC scheme can efficiently make use of large multi-socket hardware in a robust manner and suggest several directions on how CC schemes and overall OLTP DBMS should evolve in future.
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ISSN:1066-8888
0949-877X
DOI:10.1007/s00778-022-00742-4