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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,90 @@ | ||
| import time | ||
|
|
||
| import ZODB, ZODB.FileStorage,ZODB.FileStorage.interfaces | ||
| import persistent,persistent.list | ||
| import transaction | ||
| from BTrees.IOBTree import IOBTree | ||
| from BTrees.OOBTree import OOBTree | ||
|
|
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| from config import CONFIG | ||
|
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|
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| class MyZODB(): | ||
| def __init__(self,data_path='data/train_data_buffer.fs'): | ||
| self.storage = ZODB.FileStorage.FileStorage(data_path) | ||
| self.db = ZODB.DB(self.storage,cache_size=1,large_record_size=1<<64) | ||
| self.connection = self.db.open() | ||
| self.root = self.connection.root() | ||
| self.gc_cnt = 0 #20次gc一次 | ||
| while True: | ||
| try: | ||
| if not isinstance(self.root.data,IOBTree): | ||
| self.root.data = IOBTree() | ||
| transaction.commit() | ||
| else: | ||
| break | ||
| except: | ||
| time.sleep(5) | ||
| self.data = self.root.data | ||
| def close(self): | ||
| self.connection.close() | ||
| self.db.close() | ||
| self.storage.close() | ||
|
|
||
| def getMaxIters(self): | ||
| return self.data.maxKey() if len(self.data)>0 else 0 | ||
| def getMinIters(self): | ||
| return self.data.minKey() if len(self.data)>0 else 0 | ||
|
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| def __delitem__(self, key): | ||
| self.data.__delitem__(key) | ||
|
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| def gc(self,buffer_size = CONFIG['buffer_size']): | ||
| len = self.data.__sizeof__() | ||
| if len > buffer_size: | ||
| self.delAny(len / 10) #删除10%数据 | ||
| if self.gc_cnt > 20: | ||
| self.pack() | ||
| self.gc_cnt = 0 | ||
|
|
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| def delAny(self,num): | ||
| for i in range(num): | ||
| self.data.__delitem__(self.db.getMinIters()) | ||
| transaction.commit() | ||
|
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| def pack(self): | ||
| self.db.pack(time.time()) | ||
| transaction.commit() | ||
|
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| #加载所有数据 | ||
| def load(self): | ||
| return self.data.maxKey(),list([d for ds in self.data.values() for d in ds]) | ||
|
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| def dump(self,iters, data_buffer): | ||
| self.gc_cnt += 1 | ||
| i = iters | ||
| while True: | ||
| if not self.data.has_key(i): | ||
| self.data.insert(i,data_buffer) | ||
| transaction.commit() | ||
| break | ||
| else: | ||
| i += 1 | ||
| return i | ||
|
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| class Book(persistent.Persistent): | ||
|
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| def __init__(self, title): | ||
| self.title = title | ||
| self.authors = [] | ||
|
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| def add_author(self, author): | ||
| self.authors.append(author) | ||
| self._p_changed = True | ||
|
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| if __name__ == '__main__': | ||
| t = MyZODB('data/train_data_buffer.fs') | ||
| t.pack() | ||
| print(t.storage.getSize()) | ||
| print(t.getMaxIters()) | ||
| t.close() |
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