XFS In Linux 3.10 To Put On Extra Protection

[phoronix]

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

[[Knuckles]]

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!".

[RahulSundaram]

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.

[Candide]

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?

[kernelOfTruth]

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

[ryao]

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.

[RahulSundaram]

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.

[LightBit]

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.