Title:
A Recovery Conscious Framework for Fault Resilient Storage Systems
A Recovery Conscious Framework for Fault Resilient Storage Systems
Author(s)
Seshadri, Sangeetha
Liu, Ling
Chiu, Lawrence
Constantinescu, Cornel
Balachandran, Subashini
Liu, Ling
Chiu, Lawrence
Constantinescu, Cornel
Balachandran, Subashini
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Abstract
In this paper we present a recovery-conscious framework for
improving the fault resiliency and recovery efficiency of highly
concurrent embedded storage software systems. Our framework
consists of a three-tier architecture and a suite of recovery
conscious techniques. In the top tier, we promote fine-grained
recovery at the task level by introducing recovery groups to
model recovery dependencies between tasks. At the middle tier
we develop highly effective mappings of dependent tasks to processor
resources through careful tuning of recovery efficiency
sensitive parameters. At the bottom tier, we advocate the use of
recovery-conscious scheduling by careful serialization of dependent
tasks, which provides high recovery efficiency without
sacrificing system performance. We develop a formal model
to guide the understanding and the development of techniques
for effectively mapping fine-grained tasks to system resources,
aiming at reducing the ripple effect of software failures while
sustaining high performance even during system recovery. Our
techniques have been implemented on a real industry-standard
storage system. Experimental results show that our techniques
are effective, non-intrusive and can significantly boost system
resilience while delivering high performance.
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Date Issued
2007
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Text
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Technical Report