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Crash-only Linux?

Crash-only Linux?

Posted Jan 29, 2010 18:33 UTC (Fri) by dlang (subscriber, #313)
In reply to: Crash-only Linux? by clugstj
Parent article: A module for crashing the kernel

.. or when you were writing to your hard drive.

you can do this today with linux, just mount all your filesystems syncronously and you will have a system that you can shutdown at any time that it's not writing to your disk.

you will also have a system that you will find unusably slow, you don't realize how much you gain from not waiting for writes to hit disk before continuing.


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Crash-only Linux?

Posted Feb 1, 2010 13:29 UTC (Mon) by Cato (subscriber, #7643) [Link]

Actually it's quite viable to use synchronous writes on filesystems - that's how I set up all my Linux systems, having had some major hassles with data corruption on ext3. There is some performance hit but it's still a lot faster than my Windows XP laptop which has about the same CPU and RAM.

See http://lwn.net/Articles/350072/ for the details - however, I now think that the only problem is not having synchronous writes, and that LVM is largely OK. This makes sense given that LVM is used a lot in enterprise Linux servers.


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