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SUMMARY:Holistic GC: Coordinating Garbage Collection across Rack-scale Sys
 tems - Tim Harris (Oracle Lab)
DTSTART:20141113T150000Z
DTEND:20141113T160000Z
UID:TALK54154@talks.cam.ac.uk
CONTACT:Eiko Yoneki
DESCRIPTION:Many Java applications run over multiple JVMs\, letting them s
 cale to use resources across multiple physical machines\, and allowing dec
 omposition of software into multiple interacting services. Examples includ
 e popular frameworks such as Hadoop and Spark.\n\nIn this talk\, we illust
 rate how the performance of GC within individual VMs can have a significan
 t impact on a distributed application as a whole: GC behavior can decrease
  throughput for batch-style analytics applications\, and can cause high ta
 il-latencies for interactive jobs.\n\nWe argue that coordination between V
 Ms can mitigate these problems\, enabled by the low communication latency 
 possible on modern interconnects. We provide initial results from a protot
 ype system\, illustrating how we can reduce the impact of GC pauses in a b
 atch workload\, and suggesting how we will also be able to reduce the exte
 nt to which the GC causes “stragglers” in interactive settings.\n
LOCATION:FW26\, Computer Laboratory\, William Gates Builiding
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