On 10/22/10 17:28, Peter Taps wrote:
Hi Neil,
if the file offset does not match, the chances that the checksum would match,
especially sha256, is almost 0.
May be I am missing something. Let's say I have a file that contains 11 letters
- ABCDEFGHIJK. Let's say the block size is 5.
For the first file, the block contents are "ABCDE," "FGHIJ", and "K."
For the second file, let's say the blocks are " ABCD", "EFGHI", and "JK."
The chance that any checksum would match is very less. The chance that any
"checksum+verify" would match is even less.
Regards,
Peter
The block size and contents has to match for ZFS dedup.
See http://blogs.sun.com/bonwick/entry/zfs_dedup
Neil.
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