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| author | Lars Wirzenius <liw@liw.fi> | 2010-07-01 11:12:46 +1200 |
|---|---|---|
| committer | Lars Wirzenius <liw@liw.fi> | 2010-07-01 11:12:46 +1200 |
| commit | c897e5418a859a2893d380477cbdb88f1728b544 (patch) | |
| tree | 6dec44aa957e9ee3c960189cc1b0b17093cd6820 | |
| parent | d8880cf041a89858f3dae58b703f6c5808907c49 (diff) | |
| download | obnam-c897e5418a859a2893d380477cbdb88f1728b544.tar.gz | |
Only store metadata if it has changed.
B-tree lookups are massively faster than inserts,
so this saves time on incremental backups, since
most of the time, the metadata does not actually
change.
| -rw-r--r-- | obnamlib/store.py | 8 |
1 files changed, 7 insertions, 1 deletions
diff --git a/obnamlib/store.py b/obnamlib/store.py index 00cb94f0..ad2226cc 100644 --- a/obnamlib/store.py +++ b/obnamlib/store.py @@ -381,7 +381,13 @@ class GenerationStore(StoreTree): self.curgen.remove_range(key, key) def create(self, filename, metadata): - self.set_metadata(filename, metadata) + key = self.key(filename, self.FILE, self.FILE_METADATA) + try: + old_metadata = self.curgen.lookup(key) + except KeyError: + old_metadata = None + if metadata != old_metadata: + self.set_metadata(filename, metadata) # Add to parent's contents, unless already there. parent = os.path.dirname(filename) |