On Sun, 2011-03-13 at 19:59 +0100, Holger Levsen wrote: > Hi, > > On Sonntag, 13. März 2011, Ben Hutchings wrote: > > > how inefficient is it? how large? > > The larger the file, the more benefit there is from mapping its blocks > > with extents. The cost in terms of disk space is minimal. The cost in > > terms of seek operations is probably more significant. > > So how much faster is xfs with files of 10-20gb? Something like 10% or 20% or > rather something like 200%? Pass. > > XFS should be fine, but doesn't flush data to disk as eagerly as ext3, > > i.e. you need an explicit sync before you can be sure the data will > > still be there after an unclean shutdown. Same is true for ext4 (at > > least with default settings). > > The problem with unclean shutdowns is, that you hardly ever can do a sync in > advance... [...] You can sync after closing each file. Ben. -- Ben Hutchings Once a job is fouled up, anything done to improve it makes it worse.
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