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Voldemort V0.9 Released: NIO, Pipelined FSM, Hinted Handoff

I rarely have the chance to write about Project Voldemort and this new release packs so many goodies:

  • non-blocking IO client/server
  • pipelined routing based on finite state machine
  • hinted-handoff
  • zone aware routing
  • read-only stores pipeline
  • updated Java, Python, and Ruby clients

This post from Roshan Sumbaly (LinkedIn) provides all the details:

One of the most important upgrades we have done in production recently has been switching all our clients and servers from the legacy thread-per-socket blocking I/O approach to the new non-blocking implementation which multiplexes using just a fixed number of threads (usually set in proportion to the number of CPU cores on the machine). This is good from an operations perspective on the server because we no longer have to manually keep bumping up the maximum number of threads when new clients are added. From the client’s perspective we now won’t need to worry about thread pool exhaustion due to slow responses from slow servers.

Original title and link: Voldemort V0.9 Released: NIO, Pipelined FSM, Hinted Handoff (NoSQL database©myNoSQL)