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hpr_transcripts/hpr1570.txt

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+Episode: 1570
+Title: HPR1570: The JFS File System
+Source: https://hub.hackerpublicradio.org/ccdn.php?filename=/eps/hpr1570/hpr1570.mp3
+Transcribed: 2025-10-18 05:10:51
+
+---
+
+This episode of HBR is brought to you by AnanasThost.com.
+Get 15% discount on all shared hosting with the offer code HBR15.
+That's HBR15.
+Better web hosting that's Aniston Fair at AnanasThost.com.
+Alrighty guys, continuing my file system series for those of you who don't know me, I'm
+JWF and I do things with the hacker public radio or sometimes I do a really long podcast
+on my own JWP Linux podcast that I do at Lipson, I haven't done one in a while, I'm probably
+going to get back to that Lipson account because I'm paying for it and you just start
+doing something.
+Today I wanted to talk to you about JFS.
+Now JFS is different than the journaled, then what we were talking about before that
+used the RISER system, so before on a podcast I talked about journaling file system methods,
+right, or journaling file systems.
+So IBM came up with something called the journaled file system or JFS.
+Now you can select JFS as your file system in a number of things, okay?
+It's possibly one of the oldest file systems because it was developed by IBM in 1990 for
+its AIX flavor of Unix.
+However, it wasn't until the second version that it was ported to the Linux environment.
+Note the official IBM name of the second version of JFS is JFS2, but most Linux systems
+refer to it as JFS.
+So when you go in and you set up everything, it's JFS.
+JFS uses the ordered journaling method, storing only the endowed table data in the journal,
+but not removing it until the actual file data is written to the storage device.
+This method is a compromise between the speed of RISER FS and the integrity of the data
+mode journaling method.
+The JFS file system uses an extent-based file allocation allocating a group of blocks
+for each file written to the storage device.
+This method provides less fragmentation on the storage device outside of IBM Linux offerings
+JFS isn't properly used in the Linux family.
+I've used it a few times, but again, I'm mostly used to fault things.
+I think that with XT4, you can probably set the node to do the same thing with the command
+line.
+Okay, all righty, well, so we've talked about the journal file system or JFS.
+It is an option in a lot of BSDs and Linuxes.
+I hope you all have a great day and you all have a challenge with it, I'm not sure if
+it was really interesting with JFS, but it was one of the options when I installed.
+Already, hey, thank you very much.
+If you have any questions, you can reach me at JWP5 at hotmail.com.
+Thank you.
+Bye.
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