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DTSTART:19700308T020000
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DTSTAMP:20190719T085743Z
LOCATION:HG E 3
DTSTART;TZID=Europe/Stockholm:20190612T163000
DTEND;TZID=Europe/Stockholm:20190612T170000
UID:submissions.pasc-conference.org_PASC19_sess154_msa289@linklings.com
SUMMARY:VeloC: Very Low Overhead Checkpointing System
DESCRIPTION:Minisymposium\nComputer Science and Applied Mathematics, Emerg
 ing Application Domains, Chemistry and Materials, Climate and Weather, Phy
 sics, Solid Earth Dynamics, Life Sciences, Engineering\n\nVeloC: Very Low 
 Overhead Checkpointing System\n\nNicolae\n\nThis talk introduces VeloC, a 
 multi-level checkpoint/restart runtime for high performance computing
  applications that takes advantage of and delivers high performance and sc
 alability for modern, complex heterogeneous storage hierarchies without sa
 crificing ease of use and flexibility. First, the talk introduces the need
  for checkpointing at Exascale and associated challenges. Next, it highlig
 hts the key features of VeloC: (1) exposes a simple application-level API 
 to checkpoint and restart HPC applications based on either protecting
  application data structures directly or managing application-de
 fined checkpoint files; (2) hides the complexity of interacting with 
 the storage hierarchy (burst buffers, etc.) of current and future HPC syst
 ems; (3) has a modular design that facilitates flexibility in choosin
 g the resilience strategies and mode of operation (synchronous or asy
 nchronous), while being highly customizable with additional post-processin
 g modules; (3) supports use cases beyond fault tolerance: suspend-resume j
 obs over multiple reservations, revisit previous states (e.g. adjoint comp
 utations), etc. Furthermore, it provides a brief overview of the technique
 s introduces by VeloC to implements these features. Finally, the talk conc
 ludes with examples of and early results with applications that aim for Ex
 ascale and use VeloC for checkpointing.
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