I think the performances are not the main things in your case, you need to see the "managment" capabilities of each filesystems, If you want to learn more about the LVM probably you test the move of a logical volume, the extend, reduce of a logical volume and...
With Ext3 you can grow the filesystem offline and with a kernel patch you can grow online, you can not shrink.
Reiserfs V3 you can grow the filesystem online and skrink offline. I do not know the capabilities of the ReiserFS V4 (you need to patch the kernel if you want to test Reiserfs V4) .
Xfs you can grow the filesystem online, no shrink.
Jfs you can grow offline (probably there is a patch for online growing), no shrink.
With the last version of lilo and grub you can boot all these filesystems with the LVM (probably grub need a patch to support the boot form a logical volume).
Best regards.
Francis
David Johnston wrote:
On Fri, 2004-01-09 at 19:15, Greg Freemyer wrote:
On Fri, 2004-01-09 at 19:00, Chris Conn wrote:
They seem to all have their unique pros and cons.Hi, I'm running slackware 9.1, have a dual-boot Win98/Slack machine and I've just added a 60GB HD. I'm using 50GB of that for Windows (kid games :-)) and 10GB for Linux, have formatted it as EXT2 but now I'm thinking of trying one of the journaled file systems, reiserfs or IBM's JFS or EXT3. I haven't used that new partition yet.
My Slackware system is EXT2 on the original HD.
I work in AIX support at IBM (systems performance, mainly) and
I'm thinking this will be a good opportunity to learn more about the LVM at home. Is there one of these journaled file
systems that you all would recommend over the other? I'm not
sure how I'm going to convert to the new filesystem, although
I should be able to make the filesystem on the new HD whatever
I want, so I'm halfway there.
Thanks for any advice,
I don't think any of them are 'the best'.
ext3 seems to be the most solid from what I read, but not great for performance.
reiserfs is great for lots of small files. It was tuned for news servers.
xfs is great at delivering streaming video.
I don't know anything about jfs.
I chose xfs 2 years ago as my filesystem of choice because I assumed it would be the most rock solid due to the SGI support. That has not been true, but the current XFS 1.3.1 seems to work pretty well.
Maybe there is a wiki somewhere that talks about the pros and cons. If
not, there really should be.
There is, I've seen it, but I've lost the url. IIRC, the "pro" for jfs was that it had the lowest CPU usage.
If you want to tinker with logical volumes and journaled file systems to learn more about AIX, I'd go with jfs. I believe it's related but not identical to the jfs in AIX.
I've used both AIX and Linux, and like both. There are some interesting differences in their LVM, but in general your idea is sound.
I'd recommend you try all of the file systems and compare them yourself.
-David
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