On Sunday, May 06, 2012 05:19:20, Andrei POPESCU wrote: > On Vi, 04 mai 12, 15:08:57, Chris Knadle wrote: ... > > Speed is generally what XFS is good at, *except* when it comes to > > deletion of a large number of files -- that's where it's slow. > > On advise of a list subscriber I have added the 'delaylog' mount option. > This is supposed to help if you have a new enough kernel. It took me a while to find a reference for what this setting does. Having read the paragraph in the link below [it's question #40 when using the contents at the top of the page], it seems there's a speed benefit but also a risk of additional corruption in the case of an unclean shutdown. http://www.xfs.org/index.php/XFS_FAQ#Q:_I_want_to_tune_my_XFS_filesystems_for_.3Csomething.3E As for the kernel -- I'm currently using Linux 3.3.4. [I've been custom compiling my own kernel using make-kpkg from the 'kernel-package' package for a long time now.] > > Also in practice I find that any kernel crash or hard-power-off corrupts > > XFS to at least some extent requiring an xfs_check and xfs_repair, so I > > have to make sure to keep a LiveCD on hand to be able to do this. > > I using xfs only on my laptop, so I have hard power-off only if the > kernel crashes. I just did the xfs_check and xfs_repair now, but they > didn't find any problems. The last time I had a hard-power-off both of the XFS filesystems on my laptop came up clean also, however I did have corruption and had to clean out about a hundred files in /lost+found. [Mostly temp files, but 'debsums -s' also reported files missing from packages, so I needed to reinstall several packages to fix that.] -- Chris -- Chris Knadle Chris.Knadle@coredump.us GPG Key: 4096R/0x1E759A726A9FDD74
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