Editing JFS (file system) (section)

==On Linux==
In the Linux operating system, JFS is supported with the [[Linux kernel|kernel]] module (since the kernel version ''2.4.18pre9-ac4'') and the complementary [[userspace]] utilities packaged under the name ''JFSutils''. Most [[Linux distribution]]s support JFS unless it is specifically removed due to space restrictions, such as on [[live CD]]s.{{citation needed|date=August 2020}}

According to benchmarks of the available filesystems for Linux, JFS is fast and reliable, with consistently good performance under different kinds of load.<ref>{{Cite web|title=9-Way File-System Comparison With A SSD On The Linux 3.17 Kernel|url=https://www.phoronix.com/scan.php?page=article&item=9way_linux317_fs&num=1|access-date=July 7, 2020|website=Phoronix.com}}</ref>

Actual usage of JFS in Linux is uncommon, however, JFS does have a niche role in Linux: it offers a case-insensitive mount option, unlike most other Linux file systems.<ref>{{Cite web|title=jfs_mkfs: create a JFS formatted partition - Linux Man Pages (8)|url=https://www.systutorials.com/docs/linux/man/8-jfs_mkfs/|access-date=2020-07-07|website=SysTutorials.com}}</ref>

There are also potential problems with JFS, such as its implementation of journal writes. They can be postponed until there is another trigger—potentially indefinitely, which can cause data loss over a theoretically infinite timeframe.<ref>[https://www.usenix.org/events/usenix05/tech/general/full_papers/prabhakaran/prabhakaran.pdf Analysis and Evolution of Journaling File Systems - V. Prabhakaran and others] 2013-06</ref>