go__cache/docs

Gache notions

Basic idea

Like Memcached, plus...

• Usability:
  • True FLUSHALL equivalent to an instance restart
  • Single process for multiple bins
• Management
  • Complete locking dump/restore (compare cachedump/lru_crawler metadump all`)
  • Snapshots
• Tag support
• Pluggable storage
  • Journaling
  • Write-back/write-through replication
  • Chained storage (fast → slow)

Likely to be slower overall, but more convenient.

Components

Server

• Runner
  • POSIX-style options, not native in Go
  • Configuration loading for systemd (and others) integration
• Protocol handling (FSMs)
  • Application: Memcache protocol proper
  • Presentation: ASCII / Binary
  • Transport "connection":
  • TCP with persistent connections
  • TCP without persistent connections
  • UDP
  • raw socketpair (stdin/stdout)
  • Event handling
• Readline equivalence for ASCII presentation interactions
• Storage
  • Hash logic for keys
  • Pluggable storage
  • Journaling
  • Storage engines
  • Memory
  • Memcached, for use as a debugging proxy in front of a standard instance
  • Others ?
  • Memory
    • Main memory allocation
    • Slab allocator
  • Reporting
  • Background expiration lurker (cf standard lru_crawler)

Client library

Testing tools

• memslap, from libmemcached
  • On MBP2016, memcached 1.5.0 makes 25kqps on the set test,