Bugs as deviant behavior: a general approach to inferring errors in systems code
SOSP '01 Proceedings of the eighteenth ACM symposium on Operating systems principles
An empirical study of operating systems errors
SOSP '01 Proceedings of the eighteenth ACM symposium on Operating systems principles
Proceedings of the twentieth ACM symposium on Operating systems principles
File system design for an NFS file server appliance
WTEC'94 Proceedings of the USENIX Winter 1994 Technical Conference on USENIX Winter 1994 Technical Conference
Scalability in the XFS file system
ATEC '96 Proceedings of the 1996 annual conference on USENIX Annual Technical Conference
Extending file systems using stackable templates
ATEC '99 Proceedings of the annual conference on USENIX Annual Technical Conference
Parity lost and parity regained
FAST'08 Proceedings of the 6th USENIX Conference on File and Storage Technologies
An analysis of data corruption in the storage stack
FAST'08 Proceedings of the 6th USENIX Conference on File and Storage Technologies
A file is not a file: understanding the I/O behavior of Apple desktop applications
SOSP '11 Proceedings of the Twenty-Third ACM Symposium on Operating Systems Principles
Inside dropbox: understanding personal cloud storage services
Proceedings of the 2012 ACM conference on Internet measurement conference
BTRFS: The Linux B-Tree Filesystem
ACM Transactions on Storage (TOS)
Proceedings of the Twenty-Fourth ACM Symposium on Operating Systems Principles
ROOT: replaying multithreaded traces with resource-oriented ordering
Proceedings of the Twenty-Fourth ACM Symposium on Operating Systems Principles
*-Box: towards reliability and consistency in dropbox-like file synchronization services
HotStorage'13 Proceedings of the 5th USENIX conference on Hot Topics in Storage and File Systems
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Cloud-based file synchronization services have become enormously popular in recent years, both for their ability to synchronize files across multiple clients and for the automatic cloud backups they provide. However, despite the excellent reliability that the cloud back-end provides, the loose coupling of these services and the local file system makes synchronized data more vulnerable than users might believe. Local corruption may be propagated to the cloud, polluting all copies on other devices, and a crash or untimely shutdown may lead to inconsistency between a local file and its cloud copy. Even without these failures, these services cannot provide causal consistency. To address these problems, we present ViewBox, an integrated synchronization service and local file system that provides freedom from data corruption and inconsistency. ViewBox detects these problems using ext4-cksum, a modified version of ext4, and recovers from them using a user-level daemon, cloud helper, to fetch correct data from the cloud. To provide a stable basis for recovery, ViewBox employs the view manager on top of ext4-cksum. The view manager creates and exposes views, consistent in-memory snapshots of the file system, which the synchronization client then uploads. Our experiments show that ViewBox detects and recovers from both corruption and inconsistency, while incurring minimal overhead.