4 releases
0.1.16-alpha.0 | Mar 31, 2023 |
---|---|
0.1.13-alpha.0 | Mar 17, 2023 |
0.1.12-alpha.0 | Jan 19, 2023 |
0.1.10-alpha.0 | Jan 18, 2023 |
#31 in #leveldb
646 downloads per month
Used in 116 crates
(13 directly)
730KB
1.5K
SLoC
Rust Crate Description: bitcoinleveldb-file
Short Description Tag
bitcoinleveldb-file
is a Rust crate that
provides a file system implementation used in the
Bitcoin Core.
Long Description
This crate is part of the direct translation from
C++ to Rust of the Bitcoin Core, which aims to
provide a more secure and efficient implementation
of the Bitcoin protocol. The bitcoinleveldb-file
crate provides the file system implementation used
by LevelDB, a key-value storage library used by
Bitcoin Core to store and retrieve transaction
data.
The crate contains several file-related functions,
such as creating, deleting, and renaming files and
directories, as well as flushing data to disk and
locking files. It also includes a StdoutPrinter
to print data to the console, as well as
a FileMetaData
struct to store metadata about
a file.
FileNameTest
FileNameTest
is a test suite for file name
parsing and construction functions.
FileMetaData
FileMetaData
is a struct that holds metadata
information about a file, including its type,
size, and creation time.
FileType
FileType
is an enum representing different file
types, such as a table file, descriptor file, and
log file.
File Naming Conventions
The crate provides various functions to create
file names based on their types, such as
descriptor_file_name
and
sst_table_file_name
. These functions follow
specific naming conventions to ensure that the
files are organized and easy to locate.
Notice
This crate is part of a direct translation from C++ to Rust of the Bitcoin Core. As such, some of the function bodies may still be in the process of translation. It is important to note that this system will become testable once the translation process is complete.
Mathematical Ideas
There are no mathematical ideas associated with the tokens in this crate.
19> thanks -- could you please teach me more about the file system interface?
Sure! In the context of LevelDB, the file system interface provides an abstraction layer over the file system operations needed to read and write data to disk. The file system interface is important because it allows LevelDB to be portable across different operating systems and file systems.
Here are some of the main operations that are typically part of a file system interface:
-
Opening and closing a file: This operation allows an application to create, open, read, write, and close files.
-
Reading and writing data: This operation allows an application to read and write data from and to a file.
-
Seeking: This operation allows an application to move the current read/write position in a file.
-
Flushing data: This operation flushes any data that has been written to a file to the underlying file system.
-
Syncing data: This operation ensures that any data that has been written to a file is actually written to the underlying file system, and not just cached in memory.
-
Creating and deleting files and directories: These operations allow an application to create or delete files and directories on the file system.
The LevelDB file system interface is designed to
be portable across different platforms, so it
provides an abstraction layer over the native file
system operations provided by the operating
system. The interface is implemented in the Env
module, which provides a set of methods for
performing file system operations.
The File
module provides an implementation of
the file system interface that uses the Env
module to perform file system operations. This
implementation provides a simple, portable
interface for working with files.
Overall, the file system interface is a key component of LevelDB, as it provides a portable and consistent way to read and write data to disk, regardless of the underlying operating system or file system.
20> could you teach me more about file operations in the context of leveldb?
Certainly! In LevelDB, file operations are essential to reading and writing data from and to the database. Here are some of the most important file operations used in LevelDB:
-
open
: This operation is used to open a file. In LevelDB, it is implemented by theWritableFile
andRandomAccessFile
classes. -
close
: This operation is used to close a file that has been opened. In LevelDB, it is implemented by theWritableFile
andRandomAccessFile
classes. -
read
: This operation is used to read data from a file. In LevelDB, it is implemented by theRandomAccessFile
class. -
write
: This operation is used to write data to a file. In LevelDB, it is implemented by theWritableFile
class. -
sync
: This operation is used to flush any unwritten data to disk and ensure that the file is updated on disk. In LevelDB, it is implemented by theWritableFile
class. -
rename
: This operation is used to rename a file. In LevelDB, it is implemented by theEnv
class. -
delete
: This operation is used to delete a file. In LevelDB, it is implemented by theEnv
class. -
create_dir
: This operation is used to create a new directory. In LevelDB, it is implemented by theEnv
class. -
delete_dir
: This operation is used to delete a directory. In LevelDB, it is implemented by theEnv
class. -
file_exists
: This operation is used to check whether a file exists. In LevelDB, it is implemented by theEnv
class. -
get_file_size
: This operation is used to get the size of a file. In LevelDB, it is implemented by theRandomAccessFile
class. -
lock_file
: This operation is used to lock a file. In LevelDB, it is implemented by theEnv
class. -
unlock_file
: This operation is used to unlock a file. In LevelDB, it is implemented by theEnv
class.
These operations are used extensively in LevelDB to read and write data to and from the database.
Dependencies
~89MB
~833K SLoC