Large files in UNIX
Scalability. XFS scalability to meet the requirements for storage volume and
speed of the input / output when accessing memory. XFS originally designed for
very high levels of productivity, so it flows more than 300 Mbytes / s has been
demonstrated even on systems CHALLENGE. Typically, traditional files,
directories and file systems as growth usually reduces the productivity of the
system - XFS file system has been designed in such a way that its performance is
not dependent on its size. For example, the unwavering performance has been
shown in tests to XFS-directories capacity up to 32 million files.
Support for large file systems and large files. XFS provides an opportunity to
manage file systems and separate files of up to 1 exabytes (1018), that is,
millions of times larger than the largest of the modern file systems. This
provides compatibility with popular 64 - bit platforms. For example, SGI version
of the NFS network file system 5.3 enables you to export 64 - bit file systems
in other types of file systems. You can use the supplied with the XFS interface
to work with the 32 - bit programs that can work as a result of 64 - bit of
position and size. Using a combination of NFS and XFS is infinitely overcome
limitations 32 - bit systems, and all existing software will work without
recompiling with XFS files up to 2 gigabytes. However, to work with larger files,
some changes may be necessary.
XFS file system allows you to create blocks to the size of 512 bytes up to 1 MB.
The user can specify the configuration ekstentov (continuous data) file at the
time of its creation while ensuring continuity of data recording to disk, and
the increasing speed input and output. As a result, there is no delay in access
data by switching from one file to another ekstenta. The maximum size one can be
as high as 1 ekstenta terabytes.
Managing large directories with a large number of files. With the growing size
of file systems, the old method of locating files, providing a linear redundancy,
runs so slowly that is virtually useless. To meet this challenge in XFS included
large directories to index dynamically reserve space for the files.
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