usize-kv

The fastest, 64-bit data-chunk only, one-to-many key-value storage.

use-case

It is specialized for one-to-many relation for NOSQL / key-less structure of data-storage.

features

1. Compact and hashmap-level performance.
2. Theoriotically most compact data-store.

  Offset: 00 01 02 03 04 05 06 07 08 09 0A 0B 0C 0D 0E 0F 	
00000000: 00 00 00 00 00 00 00 01 00 00 00 00 00 00 00 02    ................
00000010: 00 00 00 00 00 01 86 A0 00 00 00 00 00 03 0D 40    ...............@
00000020: 00 00 00 00 00 01 86 A0 00 00 00 00 00 03 0D 40    ...............@
00000030: FF FF FF FF FF FF FF FF 00 00 00 00 00 03 0D 40    ...............@
00000040: FF FF FF FF FF FF FF FF 00 00 00 00 00 03 0D 40    ...............@
00000050: FF FF FF FF FF FF FF FF 00 00 00 00 00 03 0D 40    ...............@
00000060: FF FF FF FF FF FF FF FF 00 00 00 00 00 03 0D 40    ...............@
00000070: FF FF FF FF FF FF FF FF 00 00 00 00 00 03 0D 40    ...............@
00000080: FF FF FF FF FF FF FF FF 00 00 00 00 00 03 0D 40    ...............@
00000090: FF FF FF FF FF FF FF FF 00 00 00 00 00 03 0D 40    ...............@
000000a0: FF FF FF FF FF FF FF FF 00 00 00 00 00 03 0D 40    ...............@
000000b0: FF FF FF FF FF FF FF FF 00 00 00 00 00 03 0D 40    ...............@
000000c0: FF FF FF FF FF FF FF FF 00 00 00 00 00 03 0D 40    ...............@
000000d0: FF FF FF FF FF FF FF FF 00 00 00 00 00 03 0D 40    ...............@
000000e0: FF FF FF FF FF FF FF FF 00 00 00 00 00 03 0D 40    ...............@
000000f0: FF FF FF FF FF FF FF FF 00 00 00 00 00 03 0D 40    ...............@
00000100: FF FF FF FF FF FF FF FF 00 00 00 00 00 03 0D 40    ...............@
00000110: FF FF FF FF FF FF FF FF 00 00 00 00 00 03 0D 40    ...............@
00000120: 00 00 00 01 00 00 00 00 00 00 00 00 00 00 00 00    ................

3. Read Lock-less and Read-Write isolation. That writing will never produce locks to harm reading performance.
4. Total binary transaction from internal to TCP communication.

usage

start

cargo run

API

• A client connects to a usize-kv server by creating a TCP connection to the port 9123.
• Servers receive 64*3=192-bit commands.
• The first 64 bits are reserved for command.
• The second 64 bits are reserved for key.
• The third 64 bits are reserved for value.
• Read: 00 00 00 00 00 00 00 00 FF FF FF FF FF FF FF FF 00 00 00 00 00 00 00 00 is to read the value of key INT_MAX
• Append: 00 00 00 00 00 00 00 01 FF FF FF FF FF FF FF FF 00 00 00 00 00 00 00 02 is to append the value of key INT_MAX as value 2
• Update(remove before write): 00 00 00 00 00 00 00 02 <key*64bit> <val*64bit>
• Remove: ... 03 ...
• Empty the Database and store files: ... 04 ...
• Dump The database as a readable format: ... 05 ...
• Manually Rebuild the store file: ... 09 ...

warning

This project is under development. It may not be even usable. Issues:

• Broken TCP test and server
• Getting slower when map is getting large