pipelining

pipelining vs transaction in redis

由 不想你离开。 提交于 2019-12-29 03:13:11
问题 When we use a transaction in Redis, it basically pipelines all the commands within the transaction. And when EXEC is fired, then all the commands are executed together, thus always maintaining the atomicity of multiple commands. Isn't this same as pipelining? How are pipelining and transaction different? Also, why does not the single threaded nature of Redis suffice? Why do we explicitly need pipelining/transaction? 回答1: Pipelining is primarily a network optimization. It essentially means the

What is the minimal number of dependency chains to maximize the execution throughput?

由 怎甘沉沦 提交于 2019-12-25 09:48:09
问题 Given a chain of instructions linked by true dependencies and repeated periodically (i.e. a loop), for example (a->b->c)->(a->b->c)->... Assuming that it can be split into several shorter and independent sub-dependency chains to benefit from out-of-order execution : (a0->b0->c0)->(a0->b0->c0)->... (a1->b1->c1)->(a1->b1->c1)->... The out-of-order engine schedules each instruction to the corresponding CPU unit which have a latency and a reciprocal throughput. What is the optimal number of sub

Accessing variable outside redis pipelining function on Laravel

由 喜夏-厌秋 提交于 2019-12-24 11:24:05
问题 I am trying simple redis pipelining command using laravel and have an issue : $a = array("1","2","3"); Redis::pipeline(function($pipe) { for ($i = 0; $i < count($a); $i++) { $pipe->set("key:$a", $a); } }); And I got 'Undefined variable: a '. I think I am missing something here. Anybody can help? 回答1: This way you can make a variable to be visible within an anonymous function's scope: $a = array("1","2","3"); Redis::pipeline(function($pipe) use ($a) { for ($i = 0; $i < count($a); $i++) { $pipe

Pipelining between two SEPARATE Powershell processes

由 一笑奈何 提交于 2019-12-20 02:56:26
问题 Let's say I have two PowerShell programs running: Producer.ps1 and Consumer.ps1 . Is there any way to establish a client-server relationship between the two .ps1 files I have? Specifically, Producer.ps1 outputs a PSObject containing login info. Is there any way I can establish a listener and named pipe between the two objects to pass this PSObject from Producer.ps1 directly into Consumer.ps1 ? ( Note : the two files cannot be combined, because they each need to run as different Windows users.

How to select a value of “measure-object” directly? (powershell)

由 六月ゝ 毕业季﹏ 提交于 2019-12-13 02:24:03
问题 I am wondering about something. Not very important, but I am curious now... Let's say we have a array: PS C:\> $array 3 1129 1063 1139 1299 4446 1135 1096 1216 1075 And now we want to have the average of the values above. So I use Measure-Object : PS C:\> $array | Measure-Object -Average | select Average Average ------- 1360,1 okay. That's nice. But what if I only want to select the value, without getting some kind of "table" with the column name "average". I only want to have the value "1360

Spring Data Redis: Redis Pipeline returning always null

由 点点圈 提交于 2019-12-11 02:14:45
问题 I would like to retrieve multiple hashmap values with only specified fields. So I opted-in to Redis pipeline. While testing the below code, i see redisResponse1 is always null, where as redisResponse2 has value. getRedisTemplate().executePipelined(new RedisCallback<Object>() { @Override public Object doInRedis(RedisConnection connection) throws DataAccessException { List<byte[]> redisResponse1 = connection.hMGet(key.getBytes(), params); List<byte[]> redisResponse2 = getRedisTemplate()

What's the role of EX stage for branching in Pipelined MIPS w Forwarding?

由 微笑、不失礼 提交于 2019-12-08 10:23:36
问题 Consider the following Pipelined Processor structure: Notice that the condition test for branching (the = circuit), as well as the target address calculation for the next instruction in case of branch taken are executed in the ID phase - as a way to save on stalls/flushes (as opposed to doing all that in the EX phase and forwarding the results in the MEM phase of the given branch instruction). Since all the work gets done in Instruction Decode stage, why bother waiting for the given branching

Pipelining between two SEPARATE Powershell processes

由 让人想犯罪 __ 提交于 2019-12-01 23:06:55
Let's say I have two PowerShell programs running: Producer.ps1 and Consumer.ps1 . Is there any way to establish a client-server relationship between the two .ps1 files I have? Specifically, Producer.ps1 outputs a PSObject containing login info. Is there any way I can establish a listener and named pipe between the two objects to pass this PSObject from Producer.ps1 directly into Consumer.ps1 ? ( Note : the two files cannot be combined, because they each need to run as different Windows users. I know one possible solution for communicating is to write the PSObject to a text/xml file, then have

HTTP 1.1 Pipelining

由 时光怂恿深爱的人放手 提交于 2019-11-30 20:47:35
I have to implement an HTTP client in Java and for my needs it seems that the most efficient way to do it, is implement HTTP pipeline (as per RFC2616 ). As an aside, I want to pipeline POSTs. (Also I am not talking about multiplexing. I am talking about pipelining i.e. many requests over one connection before receiving any response- batching of HTTP requests) I could not find a third party library that explicitly states it supports pipelining. But I could use e.g. Apache HTTPCore to build such a client, or if I have to, build it by myself. The problem I have is if it is a good idea. I have not

HTTP 1.1 Pipelining

由 做~自己de王妃 提交于 2019-11-30 04:55:28
问题 I have to implement an HTTP client in Java and for my needs it seems that the most efficient way to do it, is implement HTTP pipeline (as per RFC2616). As an aside, I want to pipeline POSTs. (Also I am not talking about multiplexing. I am talking about pipelining i.e. many requests over one connection before receiving any response- batching of HTTP requests) I could not find a third party library that explicitly states it supports pipelining. But I could use e.g. Apache HTTPCore to build such
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