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Nicolas Wavrant
ZODB
Commits
b84f6284
Commit
b84f6284
authored
Dec 10, 2004
by
Tim Peters
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Note that IF trees are new in 3.4.
parent
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doc/guide/modules.tex
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b84f6284
...
@@ -61,9 +61,9 @@ structures. There are variants of the data structures specialized to
...
@@ -61,9 +61,9 @@ structures. There are variants of the data structures specialized to
integers, which are faster and use less memory. There
integers, which are faster and use less memory. There
are five modules that handle the different variants. The first two
are five modules that handle the different variants. The first two
letters of the module name specify the types of the keys and values in
letters of the module name specify the types of the keys and values in
mappings -- O for any object, I for 32-bit signed integer, and
F for
mappings -- O for any object, I for 32-bit signed integer, and
(new in
32-bit C float. For example, the
\module
{
BTrees.IOBTree
}
module provides
ZODB 3.4) F for 32-bit C float. For example, the
\module
{
BTrees.IOBTree
}
a mapping with integer keys and arbitrary objects as values.
module provides
a mapping with integer keys and arbitrary objects as values.
The four data structures provide by each module are a BTree, a Bucket,
The four data structures provide by each module are a BTree, a Bucket,
a TreeSet, and a Set. The BTree and Bucket types are mappings and
a TreeSet, and a Set. The BTree and Bucket types are mappings and
...
@@ -84,12 +84,13 @@ much better (logarithmic) worst-case time bounds, and the tree structure
...
@@ -84,12 +84,13 @@ much better (logarithmic) worst-case time bounds, and the tree structure
is built out of multiple objects, which ZODB can load individually
is built out of multiple objects, which ZODB can load individually
as needed.
as needed.
The four modules are named
\module
{
OOBTree
}
,
\module
{
IOBTree
}
,
The five modules are named
\module
{
OOBTree
}
,
\module
{
IOBTree
}
,
\module
{
OIBTree
}
,
\module
{
IIBTree
}
, and
\module
{
IFBTree
}
. The two letter
\module
{
OIBTree
}
,
\module
{
IIBTree
}
, and (new in ZODB 3.4)
prefixes are repeated in the data types names. The
\module
{
BTrees.OOBTree
}
\module
{
IFBTree
}
. The two letter prefixes are repeated in the data types
module defines the following types:
\class
{
OOBTree
}
,
\class
{
OOBucket
}
,
names. The
\module
{
BTrees.OOBTree
}
module defines the following types:
\class
{
OOSet
}
, and
\class
{
OOTreeSet
}
. Similarly, the other four modules
\class
{
OOBTree
}
,
\class
{
OOBucket
}
,
\class
{
OOSet
}
, and
\class
{
OOTreeSet
}
.
each define their own variants of those four types.
Similarly, the other four modules each define their own variants of those
four types.
The
\function
{
keys()
}
,
\function
{
values()
}
, and
\function
{
items()
}
The
\function
{
keys()
}
,
\function
{
values()
}
, and
\function
{
items()
}
methods on BTree and TreeSet types do not materialize a list with all
methods on BTree and TreeSet types do not materialize a list with all
...
...
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