ACM Transactions on Computer Systems (TOCS)
Reimplementing the Cedar file system using logging and group commit
SOSP '87 Proceedings of the eleventh ACM Symposium on Operating systems principles
A case for redundant arrays of inexpensive disks (RAID)
SIGMOD '88 Proceedings of the 1988 ACM SIGMOD international conference on Management of data
Beating the I/O bottleneck: a case for log-structured file systems
ACM SIGOPS Operating Systems Review
The design and implementation of a log-structured file system
SOSP '91 Proceedings of the thirteenth ACM symposium on Operating systems principles
File system logging versus clustering: a performance comparison
TCON'95 Proceedings of the USENIX 1995 Technical Conference Proceedings
Metadata logging in an NFS server
TCON'95 Proceedings of the USENIX 1995 Technical Conference Proceedings
DualFS: a new journaling file system without meta-data duplication
ICS '02 Proceedings of the 16th international conference on Supercomputing
Transforming policies into mechanisms with infokernel
SOSP '03 Proceedings of the nineteenth ACM symposium on Operating systems principles
yFS: A Journaling File System Design for Handling Large Data Sets with Reduced Seeking
FAST '03 Proceedings of the 2nd USENIX Conference on File and Storage Technologies
The Conquest file system: Better performance through a disk/persistent-RAM hybrid design
ACM Transactions on Storage (TOS)
The Design of New Journaling File Systems: The DualFS Case
IEEE Transactions on Computers
Chunkfs: using divide-and-conquer to improve file system reliability and repair
HOTDEP'06 Proceedings of the 2nd conference on Hot Topics in System Dependability - Volume 2
SQCK: a declarative file system checker
OSDI'08 Proceedings of the 8th USENIX conference on Operating systems design and implementation
yFS: a journaling file system design for handling large data sets with reduced seeking
FAST'03 Proceedings of the 2nd USENIX conference on File and storage technologies
Chunkfs: using divide-and-conquer to improve file system reliability and repair
HotDep'06 Proceedings of the Second conference on Hot topics in system dependability
FAST'12 Proceedings of the 10th USENIX conference on File and Storage Technologies
Ffsck: The Fast File-System Checker
ACM Transactions on Storage (TOS)
Ffsck: the fast file system checker
FAST'13 Proceedings of the 11th USENIX conference on File and Storage Technologies
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Our Netra NFS group at Sun set out to solve the challenging problem of providing remote Network File System (NFS) service with high performance and availability. An NFS server must guarantee the permanence of changes to the file system before acknowledging an NFS request. Thus, the server's underlying local file system must perform update operations synchronously to stable storage with potentially high latency. Our solution to this problem involves using the Solaris Unix File System (UFS), derived from the Berkeley Fast File System (FFS), in conjunction with nonvolatile RAM (NVRAM) as fast stable storage. We evaluated the system using the LADDIS benchmark and as a result, developed a cacheing technique for block-mapping information that gave us a 23% increase in measured server throughput in our standard RAID-5 server configuration. With recent increases in disk capacity and RAID technology, filesystem sizes have reached a point not imagined by the FFS designers, requiring an approach to checking file-system consistency that does not grow proportionately with file-system size. We examined several log-based solutions to providing fast crash recovery, but none could use the NVRAM effectively and meet our performance requirements. As an alternative, we developed an approach that uses UFS but maintains file-system working-set information, so that the consistency checker needs to examine only the active portions of a file system. This approach met our performance goals and also reduced file-system consistency-checking times to between 3% and 25% of those in the original UFS implementation.