mirrors/couchdb-ioq

Jiahui Li

Add error handling for noproc
Add error handling to avoid the following error:
$ make eunit apps=couch suites=couch_btree_prop_tests
...
**error:{assertMatch,[{module,couch_btree_prop_tests},
              {line,35},
              {comment,"Failed property test 'prop_btree_'"},
              {expression,"proper : quickcheck ( ? MODULE : F ( ) , [ { to_file , user } , { start_size , 2 } , { numtests , 3000 } , long_result ] )"},
              {pattern,"true"},
              {value,[[{set,{var,1},
                            {call,couch_btree_prop_tests,query_modify,
                                  [[551,502],[{882,c},{948,a}],[]]}}]]}]}
Related PR:

https://github.com/apache/couchdb/pull/5635
https://github.com/apache/couchdb/pull/5636

7个月前55次提交

includeAdd a proper reshard ioq class3年前
privAdd a proper reshard ioq class3年前
srcAdd error handling for `noproc`7个月前
testMake sure to handle `other` priority in ioq's new bypass/2 API1年前
.gitignoreGit ignore .eunit directory3年前
IOQ2.mdAdd dynamic IOQ class documentation7年前
README.mdImport Cloudant's full IOQ code7年前
operator_guide.mdAdd a proper reshard ioq class3年前
rebar.configAdd editors magic lines3年前
rebar.config.scriptAdd editors magic lines3年前

README.md

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.

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README.md

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