v0.2.2

Release notes

It is a hot-fix release.

Optimizations and Fixes

• Fix invalid memory allocation control for string values on SET command, it corrupts setting values
• Use mmap() for logging file mechanism, so remove redundant copying operations
• Add free'ing all OpenSSL
• Add memory allocation errors to SET command

Full Changelog: v0.2.1...v0.2.2

v0.2.1

Release notes

Optimizations and Fixes

• Remove thread queue states
• Add batching for handling transactions loop
• Integer alignment error of ltoa() method (from #33)
• Add many memory allocation errors for out-of-memory (from #36)
• Fix data race for transaction loop on killing
• Invalid free'ing memory block on free_clients() method
• Optimize handling I/O requests loop

New contributors

• @savashn for #33, #36

Full Changelog: v0.2.0...v0.2.1

v0.2.0

Release notes

Changes

• Move code standard to C23
• Add jemalloc dependency for better memory operations
• Add gperf dependency for perfect hash method
• Add building on MacOS and publishing to Docker CI workflows

Features

• Add extended integer/double support
• Complete installation via Dockerfile
• Add transaction queue
• Add full compatibility for MacOS
• Improve error handling
• Add I/O threads to handle terminating clients, reading data and converting them to processable commands, writing responses

Commands

• Add CLIENT LIST command
• Add INCRBY and DECRBY commands
• Add multiple keys support to INCR and DECR commands

Optimizations and Fixes

• Replace B-Tree with HashTable for caching full database in memory (from #10)
• Replace mutex locking with thread queue for transactions handling
• Improve CPU cache and predicting branches (from #28)
• Add arena allocator
• Many optimizations for most of utility methods and commands
• Many fixes, especially memory leaks, for most of utility methods, commands and server
• Use perfect hash method for command searching
• Fix linear probing on get_data() method

New contributors

• @mihribantastan for #19
• @dhgatjeye for #6, #7, #8, #12, #15, #16, #18, #21, #22, #25

Full Changelog: v0.1.9...v0.2.0

v0.1.9

Release notes

Features

• Add multiple database support
• Add catching SIGTERM and SIGINT signals for closing from a process manager
• Add MacOS compatibility (from #2)
• Replace build system to CMake

Commands

• Add SELECT command
• Add HGETALL, HKEYS and HVALS command
• Add AS argument to change types of values to SET command

Optimizations and Fixes

• Optimize and fix HashTable (from #3)
• Some minor performance optimizations about transactions
• Some minor fixes about database file
• Add command pipelining, so multiple commands can be executed in one iteration
• Replace multiplexing API to epoll

Full Changelog: v0.1.8...v0.1.9

v0.1.8

Release notes

• Add CLIENT KILL, CLIENT LOCK and CLIENT UNLOCK commands
• Add some error messages
• Replace .tellylock with file locking for checking server is opened or not
• Many performance improvements and fixes

Full Changelog: v0.1.7...v0.1.8

v0.1.7

Release notes

• Add error handling and change memory allocations to aligned memory allocations for B-Tree (caching) to reduce CPU overhead
• Add authorization system
• Add PWD, AUTH, APPEND and DEL commands
• Deleting hash table and list from cache when they have no field/node
• Add DIRECT I/O to database file and logging file, so reduces most of system calls and CPU/kernel overhead
• Improve deleting algorithm of B-Tree, almost (?) done
• Add .tellylock file to check if server is opened or not
• Minor performance optimizations

Full Changelog: v0.1.6...v0.1.7

v0.1.6

Release Notes

• Add RESP3 protocol support
• Add AGE, SAVE, LASTSAVE, DBSIZE, BGSAVE and HELLO commands
• Delete MEMORY command
• Add partial deleting/balancing B-Tree
• Change database file structure
• Add saving Hash Table value to database file
• Remove DIRECT I/O because of errors and handling cost
• Many optimizations and fixes
• Add some errors to commands

Full Changelog: v0.1.5...v0.1.6

v0.1.5

Release Notes

• Add HDEL command and deleting field-value pair from hash table
• Update HLEN command for showing detailed length data
• Add TLS support and its configuration options
• Add saving/reading List data from database file
• Add MAX_LOG_LINES option to configuration file
• Add thread safety via mutex locks
• Many performance optimizations and fixes

Full Changelog: v0.1.4...v0.1.5

v0.1.4

Release Notes

• Add caching all keys (keyspace)
• Add partial deleting key-value pair from binary tree
• Many performance optimizations
• Many fixes
• Add LINDEX and EXISTS commands
• Add NX and XX arguments to SET command
• Add sections as arguments to INFO command
• Add parsing string values to configuration file and log file

Full Changelog: v0.1.3...v0.1.4

v0.1.3

Release Notes

• Add partial lists and partial hash table
• Fix inserting key-value pair to binary tree, it works properly
• Some performance improvements
• Add hash table and list commands
• Add GET argument to SET command
• Change optimization flag of compiler

Full Changelog: v0.1.2...v0.1.3