Chapter 7. File System
The XFS file system is currently supported in Red Hat Enterprise Linux 6 and is well suited for very large files and file systems on a single host. Integrated backup and restore, direct I/O and online resizing of the file system are some of the benefits that this file system provides.
Parallel NFS (pNFS) is a part of the NFS v4.1 standard that allows clients to access storage devices directly and in parallel. The pNFS architecture eliminates the scalability and performance issues associated with NFS servers in deployment today.
/etc/modprobe.d/dist-nfsv41.conffile with the following line and reboot the system:
alias nfs-layouttype4-1 nfs_layout_nfsv41_files
-o minorversion=1mount option is specified, and the server is pNFS-enabled, the pNFS client code is automatically enabled.
The CIFS (Common Internet File System) protocol allows for a unified way to access remote files on disparate operating systems. The CIFS client has traditionally only allowed for synchronous writes. This meant that the client process would not yield back control until the writes were successfully completed. This can lead to degraded performance for large transactions that take long to complete. The CIFS client has been updated to write data in parallel without the need to wait for the sequential writes. This change can now result in performance improvements up to 200%.
Support for NTLMSSP authentication has been added to CIFS. In addition, CIFS now uses the kernel's crypto API.
autofs4 module has been updated to kernel version 2.6.38.
Fixed tracepoints have been added to
Support for the
-o nobarrier mount option in
ext4, and its utilities: tune2fs, debugfs, libext2fs, has been added.