Fix compiler warnings

- test/ioq_tests.erl:14:2: Warning: export_all flag enabled - all functions will be exported
- src/ioq_server2.erl:857: Warning: the result of the expression is ignored (suppress the warning by assigning the expression to the _ variable)
- src/ioq/src/ioq_server2.erl:928:52: Warning: variable 'RL' is unused
- test/ioq_kv_tests.erl:125:14: Warning: random:uniform/1 is deprecated; use the 'rand' module instead
3 files changed
tree: 51d8bdb40ad24db3fda70fd383ee46cc3508e925
  1. include/
  2. priv/
  3. src/
  4. test/
  5. .gitignore
  9. rebar.config
  10. rebar.config.script

IOQ classes

The following are the list of IOQ classes:

  • interactive
  • db_update
  • view_update
  • db_compact
  • view_compact
  • internal_repl
  • low

Bypassing IOQ

One can configure an ioq bypass, which removes an IO class from prioritization, as below:

config:set("ioq.bypass", "view_update", "true")

Note that setting an IOQ bypass can effectively trump all other classes, especially in the case of an interactive bypass v. compaction. This can lead to high disk usage.

Setting priorities

The priority for a class can also be set ala:

config:set("ioq", "compaction", "0.3")

Or globally, using snippet/rpc:

s:set_config("ioq", "compaction", "0.314", global)
rpc:multicall(config, set, ["ioq", "compaction", "0.217"])

As the interactive class is ‘everything else’ its priority cannot be directly set.