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File system Stores file owner POSIX file permissions Creation timestamps Last access/ read timestamps Last metadata change timestamps Last archive timestamps Access control lists
He intended it to be an advanced file system with modern features [16] like those of ZFS or Btrfs, with the speed and performance of file systems such as ext4 and XFS. [3] As of 2017 Overstreet was receiving financial support for the development of Bcachefs via Patreon. [5] As of mid-2018, the on-disk format had settled. [8]
In Linux, the ext2, ext3, ext4, JFS, Squashfs, UBIFS, Yaffs2, ReiserFS, Reiser4, XFS, Btrfs, OrangeFS, Lustre, OCFS2 1.6, ZFS, and F2FS [11] filesystems support extended attributes (abbreviated xattr) when enabled in the kernel configuration. Any regular file or directory may have extended attributes consisting of a name and associated data.
ext4 (fourth extended filesystem) is a journaling file system for Linux, developed as the successor to ext3.. ext4 was initially a series of backward-compatible extensions to ext3, many of them originally developed by Cluster File Systems for the Lustre file system between 2003 and 2006, meant to extend storage limits and add other performance improvements. [4]
Disk Cloning Software Disk cloning capabilities of various software. Name Operating system User Interface Cloning features Operation model License
XFS was the recommended underlying filesystem for Filestore OSDs, and Btrfs could be used at one's own risk. ext4 filesystems were not recommended due to limited metadata capacity. [24] The BlueStore back end does still use XFS for a small metadata partition. [25]
Although ext is not a specific file system name, it has been succeeded by ext2, ext3, and ext4. It has metadata structure inspired by traditional Unix filesystem principles, and was designed by Rémy Card to overcome certain limitations of the MINIX file system.
The XFS filesystem, starting with Linux 5.10, has an optional "big timestamps" feature which extends the timestamp range to the year 2486. [27] While the native APIs of OpenVMS can support timestamps up to 31 July 31086, [28] the C runtime library (CRTL) uses 32-bit integers for time_t. [29]