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43
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50
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zlib-compression which is relatively well-tested but still might
cause corruption if used improperly. And there is the relatively
new delta-encoding mechanism designed expressly for fossil. We want
to make sure that bugs in these encoding mechanisms do not lead to
loss of data.
To increase our confidence that everything in the repository is
recoverable, fossil makes sure it can extract an exact replicate
of every content file that it changes just prior to transaction
commit. So during the course of check-in (or other repository
operation) many different files
in the repository might be modified. Some files are simply
compressed. Other files are delta encoded and then compressed.
While all this is going on, fossil makes a record of every file
that is encoded and the SHA1 hash of the original content of that
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|
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
|
zlib-compression which is relatively well-tested but still might
cause corruption if used improperly. And there is the relatively
new delta-encoding mechanism designed expressly for fossil. We want
to make sure that bugs in these encoding mechanisms do not lead to
loss of data.
To increase our confidence that everything in the repository is
recoverable, fossil makes sure it can extract an exact replica
of every content file that it changes just prior to transaction
commit. So during the course of check-in (or other repository
operation) many different files
in the repository might be modified. Some files are simply
compressed. Other files are delta encoded and then compressed.
While all this is going on, fossil makes a record of every file
that is encoded and the SHA1 hash of the original content of that
|