small todo list¶

• workers
  • out-of-fd handling should be (only) in the main worker

• implement stat-caching with extra threads
• add per plugin+virtual-request specific data
• accesslog
• physical.* conditionals
• regexp support
• ipv6 support

• angel
  • zero downtime restarts
  • fd passing
  • backend spawning with different uid/gid
  • log rotation (or use the zero downtime restart?)

• throttling
  • each connection gets a "magazine" that represents the amount of bytes it can send at the moment
  • when sending data, decrease the magazine
  • if magazine reaches 0, remove EV_WRITE for the sockwatcher and put connection at the end of the throttling queue
  • each N milliseconds (maybe 500, configure via setup?), check if there are waiting connections in the queue and rearm if waiting for > N ms
  • when rearming a connection, add number of allowed bytes to the magazine and set EV_WRITE again
  • add throttling via "pools". all connections in a specific pool share a magazine which enables throttling of all connections in a vhost for example
  • add throttling by ip (somewhat more complex)

• log
  • scheme:// prefix
  • write logs directly out in startup phase

• implement better counter_format(): allow output like "10 961 KiB"

• find good hashing algorithms for ipv6 and memory addresses

• add mechanism to store plugin data specific to client ip address. can be used for bandwidth throttling, limit requests per second, limit concurrent requests etc
  • what would be the fastest algorithm for this task? hashtable, some kind of tree (red-black?) etc
  • a lot of inserts, deletes and lookups
  • has to be shared among all workers so locking needed