Crash Consistency
نویسندگان
چکیده
Keeping data safe in the presence of crashes is a fundamental problem storage systems. Although high-level ideas for crash consistency are relatively well understood, realizing them practice surprisingly complex and full challenges. The systems research community actively working on solving this challenge, papers examined here offer three solutions.
منابع مشابه
Lightweight Application-Level Crash Consistency on Transactional Flash Storage
Applications implement their own update protocols to ensure consistency of data on the file system. However, since current file systems provide only a preliminary ordering guarantee, notably fsync(), these update protocols become complex, slow, and error-prone. We present a new file system, CFS, that supports a native interface for applications to maintain crash consistency of their data. Using...
متن کاملDesigning multicore scalable filesystems with durability and crash consistency
It is challenging to simultaneously achieve multicore scalability and high disk throughput in a file system. For example, data structures that are on separate cache lines in memory (e.g., directory entries) are grouped together in a transaction log when the file system writes them to disk. This grouping results in cache line conflicts, thereby limiting scalability. McoreFS is a novel file syste...
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Modern file systems provide a set of mechanisms to ensure consistent recovery of the file system in the event of a computer crash. However, these mechanisms are complex and hard to implement correctly. Furthermore, these mechanisms are time consuming to test, leading to only a cursory set of crash consistency tests being run on new file systems and any patches submitted to existing file systems...
متن کاملIs Ordering of Disk Updates Required to Maintain File-System Crash-Consistency?
On reboot after a crash, the file system should be consistent: e.g., previously correct files should not now contain garbage. In early file systems, getting to a consistent state involved a full scan after reboot. This was very slow, and impractical for large systems. Modern file systems improve upon this by writing updates to disk in a specific order : e.g, metadata before commit blocks. This ...
متن کاملCrash Systems
Pre-Crash Systems (PCS) integrate the features of active and passive safety systems to reduce both crash and injury severity. Upon detection of an impending collision, PCS can provide an early warning to the driver and activate automatic braking to reduce the crash severity for the subject vehicle. PCS can also activate the seatbelt pretensioners prior to impact. This paper identifies the oppor...
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ژورنال
عنوان ژورنال: ACM Queue
سال: 2022
ISSN: ['1542-7730', '1542-7749']
DOI: https://doi.org/10.1145/3561654