xfsprogs
Details
| Last Update: | 2008-02-07 17:01:04 |
| Version: | 2.9.6 |
| License/Program Type: | GPL (GNU General Public License) |
| Publisher: | Silicon Graphics, Inc. |
| Price: | $0.00 |
Description:
XFS combines advanced journaling technology with full 64-bit
addressing and scalable structures and algorithms. This combination
delivers the most scalable high-performance filesystem ever
conceived.
Here are some key features of
"xfsprogs":
Quick Recovery
· The XFS journaling technology allows it to restart
very quickly after an unexpected interruption, regardless of the
number of files it is managing. Traditional filesystems must do
special filesystem checks after an interruption, which can take
many hours to complete. The XFS journaling avoids these lengthy
filesystem checks.
Fast Transactions
· The XFS filesystem provides the advantages of
journaling while minimizing the performance impact of journaling on
read and write data transactions. Its journaling structures and
algorithms are tuned to log the transactions rapidly.
· XFS uses efficient tree structures for fast searches
and rapid space allocation. XFS continues to deliver rapid response
times, even for directories with tens of thousands of entries.
Massive Scalability
· XFS is a full 64-bit filesystem, and thus is capable
of handling filesystems as large as a million terabytes.
· 263 = 9 x 1018 = 9 exabytes
· A million terabytes is thousands of times larger than
most large filesystems in use today. This may seem to be an
extremely large address space, but it is needed to plan for the
exponential disk density improvements observed in the storage
industry in recent years. As disk capacity grows, not only does the
address space need to be sufficiently large, but the structures and
algorithms need to scale. XFS is ready today with the technologies
needed for this scalability.
· XFS also continues to evolve to match the capabilities
of the hardware it is being deployed on. Efficiency when dealing
with large amounts (terabytes) of main memory and hence large
numbers of active files and large amounts of cached file data are
areas demanding continual improvements. Extending XFS to improve
performance on large NUMA machines is also an area of active
research and development.
Efficient Allocations
· XFS implements extremely sophisticated space
management techniques. Efficiency in space management has been
achieved through the use of variable sized extents, rather than the
simple single-block-at-a-time mechanism of many other filesystems.
XFS was the first filesystem to implement delayed space allocation
for buffered writes, supports direct I/O, provides an optional
realtime allocator, and is able to align allocations based on the
geometry of the underlying storage device. The XFS allocator
performs admirably in the presence of multiple parallel writers,
and is renowned for its resistance to space fragmentation under
such conditions.
Excellent Bandwidth
· XFS is capable of delivering very close to the raw I/O
performance that the underlying hardware can provide. XFS has
proven scalability on SGI Altix systems of multiple
gigabytes-per-second on multiple terabyte filesystems.
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