Date: Sat, 16 Jun 2012 20:01:10 +0100 From: Chris Rees <utisoft@gmail.com> To: Wojciech Puchar <wojtek@wojtek.tensor.gdynia.pl> Cc: freebsd-hackers@freebsd.org, Xin LI <d@delphij.net> Subject: Re: BIO_DELETE equivalent for file on FFS filesystem Message-ID: <CADLo83-T%2B4W2aUKc=-CEUrOqwCq5aqipt-fK=BBboQVNJ3qcWQ@mail.gmail.com> In-Reply-To: <alpine.BSF.2.00.1206140647080.72545@wojtek.tensor.gdynia.pl> References: <alpine.BSF.2.00.1205261704590.70782@wojtek.tensor.gdynia.pl> <4FD94240.6060806@delphij.net> <alpine.BSF.2.00.1206140647080.72545@wojtek.tensor.gdynia.pl>
next in thread | previous in thread | raw e-mail | index | archive | help
On Jun 14, 2012 5:49 AM, "Wojciech Puchar" <wojtek@wojtek.tensor.gdynia.pl> wrote: >>> >>> file to take 900MB or... can i call some system function to "punch" >>> holes? >> >> >> I think you can only truncate the file at this time, pretty much like >> brk() works for memory. > > > > BAD. suppose i keep windoze VM image on filesystem which takes 10GB but uses 5GB. > > i could write simple program to find out what blocks are unused and then...do nothing. > What if you cp it? Chris
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?CADLo83-T%2B4W2aUKc=-CEUrOqwCq5aqipt-fK=BBboQVNJ3qcWQ>