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XFS In Linux 3.10 To Put On Extra Protection

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  • XFS In Linux 3.10 To Put On Extra Protection

    Phoronix: XFS In Linux 3.10 To Put On Extra Protection

    The XFS file-system with the forthcoming Linux 3.10 kernel will have an experimental feature for CRC protection of meta-data...

    http://www.phoronix.com/vr.php?view=MTM2Mzg

  • #2
    Crc for meta-data is cool and all that, but it's like saying "well, the trojan wiped all your data, but since it didn't get root, at least you don't need to reinstall your OS!".

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    • #3
      Originally posted by [Knuckles] View Post
      Crc for meta-data is cool and all that, but it's like saying "well, the trojan wiped all your data, but since it didn't get root, at least you don't need to reinstall your OS!".
      CRC for metadata isn't designed for security. It is just a means of ensuring metadata integrity.

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      • #4
        Originally posted by RahulSundaram View Post
        CRC for metadata isn't designed for security. It is just a means of ensuring metadata integrity.
        This interests me. I've used XFS before and it was always good, so I wouldn't mind abandoning ext4 and going back to XFS if there was some advantage in doing so. Data integrity is a big deal for me, and I'd rate it more important than performance (though good performance is always nice to). Actually, XFS does perform well. So I guess my next question is: does ext4 have CRC checking too, or is XFS the first?

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        • #5
          Originally posted by Candide View Post
          This interests me. I've used XFS before and it was always good, so I wouldn't mind abandoning ext4 and going back to XFS if there was some advantage in doing so. Data integrity is a big deal for me, and I'd rate it more important than performance (though good performance is always nice to). Actually, XFS does perform well. So I guess my next question is: does ext4 have CRC checking too, or is XFS the first?
          ext4.wiki.kernel.org: Ext4 Metadata Checksums

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          • #6
            Originally posted by Candide View Post
            This interests me. I've used XFS before and it was always good, so I wouldn't mind abandoning ext4 and going back to XFS if there was some advantage in doing so. Data integrity is a big deal for me, and I'd rate it more important than performance (though good performance is always nice to). Actually, XFS does perform well. So I guess my next question is: does ext4 have CRC checking too, or is XFS the first?
            This is designed to protect metadata integrity. It will not make XFS protect your data anymore than it already does. That is to say, not at all.

            If you want data integrity, you should use ZFS.

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            • #7
              Originally posted by Candide View Post
              This interests me. I've used XFS before and it was always good, so I wouldn't mind abandoning ext4 and going back to XFS if there was some advantage in doing so. Data integrity is a big deal for me, and I'd rate it more important than performance (though good performance is always nice to). Actually, XFS does perform well. So I guess my next question is: does ext4 have CRC checking too, or is XFS the first?
              XFS isn't the first. Linux 3.5 introduced some checksums for metadata integrity in Ext4

              http://kernelnewbies.org/Linux_3.5#h...a7b417333147f8

              Btrfs provides better data integrity but like all filesystems has its own set of tradeoffs.

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              • #8
                Originally posted by ryao View Post
                This is designed to protect metadata integrity. It will not make XFS protect your data anymore than it already does. That is to say, not at all.

                If you want data integrity, you should use ZFS.
                NILFS2 is also interesting for data integrity.

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