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SUMMARY:System Seminars - Title : FlashTier: A Lightweight\, Consistent an
 d Durable Storage Cache
DTSTART:20120416T130000
DTEND:20120416T143000
DTSTAMP:20260407T110529Z
UID:de70d8f474f3d53d2c621b27a8868dae8e235b8fb4876553095c27f5
CATEGORIES:Conferences - Seminars
DESCRIPTION:Mohit Saxena\nAbstract :\nThe availability of high-speed solid
 -state storage has introduced a new tier into the storage hierarchy. Low-l
 atency and high-IOPS solid-state drives (SSDs) cache data in front of high
 -capacity disks. However\, most existing SSDs are designed to be a drop-in
  disk replacement\, and hence are mismatched for use as a cache.\nThis wor
 k describes FlashTier\, a system architecture built upon solid-state cache
  (SSC)\, a flash device with an interface designed for caching. Management
  software at the operating system block layer directs caching. The FlashTi
 er design addresses three limitations of using traditional SSDs for cachin
 g. First\, FlashTier provides a unified logical address space to reduce th
 e cost of cache block management within both the OS and the SSD. Second\, 
 FlashTier provides cache consistency guarantees allowing the cached data t
 o be used following a crash. Finally\, FlashTier leverages cache behavior 
 to silently evict data blocks during garbage collection to improve perform
 ance of the SSC.\nWe have implemented an SSC simulator and a cache manager
  in Linux. In trace-based experiments\, we show that FlashTier reduces add
 ress translation space by 60% and silent eviction improves performance by 
 up to 167%. Furthermore\, FlashTier can recover from the crash of a 100GB 
 cache in only 2.4 seconds.\n\nBio :\nMohit Saxena is a PhD candidate at th
 e Computer Sciences department\, University of Wisconsin-Madison. His rese
 arch interests lie in operating systems and storage\, with current focus o
 n new interfaces for flash and non-volatile memory technologies. In the pa
 st\, he has investigated different memory abstractions within the OS to us
 e flash SSDs -- as a cheap medium to virtualize expensive main memory\, a 
 durable medium to persist volatile main memory\, and a fast medium to cach
 e slow disk storage. Before joining Wisconsin\, he graduated with MS from 
 Purdue University and B.Tech. from Indian Institute of Technology (IIT-Del
 hi) in Computer Sciences.
LOCATION:BC 229 https://plan.epfl.ch/?room==BC%20229
STATUS:CONFIRMED
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