| Date | Thu, 4 Dec 2003 23:10:15 +0200 (MET DST) | From | Szakacsits Szabolcs <> | Subject | Re: Is there a "make hole" (truncate in middle) syscall? |
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On Thu, 4 Dec 2003, Rob Landley wrote:
> What are the downsides of holes? [...] is there a performance penalty to > having a file with 1000 4k holes in it, etc...)
Depends what you do, what fs you use. Using XFS XFS_IOC_GETBMAPX you might get a huge improvement, see e.g. some numbers,
http://marc.theaimsgroup.com/?l=reiserfs&m=105827549109079&w=2
The problem is, 0 general purpose (like cp, tar, cat, etc) util supports it, you have to code your app accordingly.
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