[zfs-discuss] ZFS utility like Filefrag on linux to help analyzing the extents mapping
Hello All, I'd like to know if there is an utility like `Filefrag' shipped with e2fsprogs on linux, which is used to fetch the extents mapping info of a file(especially a sparse file) located on ZFS? I am working on efficient sparse file detection and backup through lseek(SEEK_DATA/SEEK_HOLE) on ZFS, and I need to verify the result by comparing the original sparse file and the copied file, so if there is such a tool available, it can be used to analyze the start offset and length of each data extent. Thanks in advance! -Jeff ___ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
Re: [zfs-discuss] ZFS utility like Filefrag on linux to help analyzing the extents mapping
On Wed, Feb 16, 2011 at 8:53 PM, Jeff liu jeff@oracle.com wrote: Hello All, I'd like to know if there is an utility like `Filefrag' shipped with e2fsprogs on linux, which is used to fetch the extents mapping info of a file(especially a sparse file) located on ZFS? Something like zdb - maybe? http://cuddletech.com/blog/?p=407 -- Fajar I am working on efficient sparse file detection and backup through lseek(SEEK_DATA/SEEK_HOLE) on ZFS, and I need to verify the result by comparing the original sparse file and the copied file, so if there is such a tool available, it can be used to analyze the start offset and length of each data extent. ___ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
Re: [zfs-discuss] ZFS utility like Filefrag on linux to help analyzing the extents mapping
Hi Fajar, Thanks for your quick response, just playing it around for a while, it is very useful to me. Have a nice day! -Jeff 在 2011-2-16，下午10:16， Fajar A. Nugraha 写道： On Wed, Feb 16, 2011 at 8:53 PM, Jeff liu jeff@oracle.com wrote: Hello All, I'd like to know if there is an utility like `Filefrag' shipped with e2fsprogs on linux, which is used to fetch the extents mapping info of a file(especially a sparse file) located on ZFS? Something like zdb - maybe? http://cuddletech.com/blog/?p=407 -- Fajar I am working on efficient sparse file detection and backup through lseek(SEEK_DATA/SEEK_HOLE) on ZFS, and I need to verify the result by comparing the original sparse file and the copied file, so if there is such a tool available, it can be used to analyze the start offset and length of each data extent. ___ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
