一尘不染

Redis可以禁用对管道命令的答复吗?

redis

我目前正在开发一个缓存,需要为每个调用增加数百个计数器,如下所示:

redis.pipelined do
  keys.each{ |key| redis.incr key }
end

现在,在我的配置文件中,我看到redis
gem仍收集了我不需要的答复,并浪费了一些宝贵的时间。我可以通过某种方式告诉Redis我对回复不感兴趣吗?有没有更好的方法来增加很多值。

MINCR例如,我没有找到命令。

提前致谢!


阅读 301

收藏
2020-06-20

共1个答案

一尘不染

是的…至少在2.6中。您可以在LUA脚本中执行此操作,只需让LUA脚本返回空结果即可。这是使用booksleeve客户端的:

const int DB = 0; // any database number
// prime some initial values
conn.Keys.Remove(DB, new[] {"a", "b", "c"});
conn.Strings.Increment(DB, "b");
conn.Strings.Increment(DB, "c");
conn.Strings.Increment(DB, "c");

// run the script, passing "a", "b", "c", "c" to
// increment a & b by 1, c twice
var result = conn.Scripting.Eval(DB,
    @"for i,key in ipairs(KEYS) do redis.call('incr', key) end",
    new[] { "a", "b", "c", "c"}, // <== aka "KEYS" in the script
    null); // <== aka "ARGV" in the script

// check the incremented values
var a = conn.Strings.GetInt64(DB, "a");
var b = conn.Strings.GetInt64(DB, "b");
var c = conn.Strings.GetInt64(DB, "c");

Assert.IsNull(conn.Wait(result), "result");
Assert.AreEqual(1, conn.Wait(a), "a");
Assert.AreEqual(2, conn.Wait(b), "b");
Assert.AreEqual(4, conn.Wait(c), "c");

incrby通过将“ by”数字作为参数传递来做同样的事情,将中间部分更改为:

// run the script, passing "a", "b", "c" and 1, 1, 2
// increment a & b by 1, c twice
var result = conn.Scripting.Eval(DB,
    @"for i,key in ipairs(KEYS) do redis.call('incrby', key, ARGV[i]) end",
    new[] { "a", "b", "c" }, // <== aka "KEYS" in the script
    new object[] { 1, 1, 2 }); // <== aka "ARGV" in the script
2020-06-20