Messages in this thread | | | From | Jesse Pollard <> | Subject | Re: XFS? | Date | Fri, 13 Sep 2002 07:47:54 -0500 |
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On Friday 13 September 2002 02:47 am, Ivan Ivanov wrote: > I think that you missed the main problem with all this new "great" > filesystems. And the main problem is potential data loss in case of a > crash. Only ext3 supports ordered or journal data mode. > > XFS and JFS are designed for large multiprocessor machines powered by UPS > etc., where the risk of power fail, or some kind of tecnical problem is > veri low. > > On the other side Linux works in much "risky" environment - old > machines, assembled from "yellow" parts, unstable power suply and so on. > > With XFS every time when power fails while writing to file the entire file > is lost. The joke is that it is normal according FAQ :)
Also note, it has been my experience that the blocks allocated to the file are also lost. It takes a fsck operation to recover that.
I had a raided XFS filesystem that lost power at 3am every night... IRIX panic/crash/dead. After the third one in a row half of the raid volume was missing. I noticed that when the aviailable space was exausted. It took an xfs_repair to rebuild the free space. (power failure due to overloaded circuit and somebody turned on a monitor...)
> JFS has the same problem. > With ReiserFS this happens sometimes, but much much rarely. May be v4 will > solve this problem at all. > > The above three filesystems have problems with badblocks too. > > So the main problem is how usable is the filesystem. I mean if a company > spends a few tousand $ to provide a "low risky" environment, then may be > it will use AIX or IRIX, but not Linux. > And if I am running a <$1000 "server" I will never use XFS/JFS. > > ----------------- > Best Regards > Ivan
-- ------------------------------------------------------------------------- Jesse I Pollard, II Email: pollard@navo.hpc.mil
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