[Leveldb] Introduction to an interface file in source code analysis

. Include... leveldb... db. hdb. h defines basic operation interfaces, including Put, Write, and Delete. Put, Write and Other interfaces are implemented using pure virtual functions, but they are implemented by default ..... Cache. hlebeldb cache interface, implemented using LUR algorithm, provides interfaces for adding, deleting, and searching... comparator. h Pressure

./Include.../leveldb.../db. h db. h defines basic operation interfaces, including Put, Write, and Delete. Put, Write and Other interfaces are implemented using pure virtual functions, but they are implemented by default. .../Cache. h lebeldb cache interface, implemented using LUR algorithm, provides interfaces for adding, deleting, and searching.../comparator. h Pressure

./Include
../Leveldb
.../../Db. h
Db. h defines basic operation interfaces, including Put, Write, and Delete. Put, Write and Other interfaces are implemented using pure virtual functions, but they are implemented by default.
.../../Cache. h
The lebeldb cache interface is implemented using the LUR algorithm and provides interfaces for adding, deleting, and searching.
.../Comparator. h
Compression Algorithm Interface
.../../Env. h
Environment Settings, some file operations
.../../Filter_policy.h
Some filtering methods define a series of interfaces for implementation
.../Iterator. h
A series of iterator operations, including First, end, seek, etc.
.../Options. h
Define a series of database operations, read/write, etc.
.../../Slice. h
Data Element
.../Status. h
Returned status, OK, IOERROR
.../../Table_builder.h
Controllers used to store tables
.../Table. h
Implement various write operations, including deleting identifiers