capacity

问题 In my Android app I use Amazon DynamoDB. I created 10 tables with Read capacity 10 and Write capacity 5. Today I received an email from Amazon. It costs me 11.36$. I don't understand the meaning of free tier. Here is what I read from Amazon: DynamoDB customers get 25 GB of free storage, as well as up to 25 write capacity units and 25 read capacity units of ongoing throughput capacity (enough throughput to handle up to 200 million requests per month) and 2.5 million read requests from DynamoDB

问题 In my Android app I use Amazon DynamoDB. I created 10 tables with Read capacity 10 and Write capacity 5. Today I received an email from Amazon. It costs me 11.36$. I don't understand the meaning of free tier. Here is what I read from Amazon: DynamoDB customers get 25 GB of free storage, as well as up to 25 write capacity units and 25 read capacity units of ongoing throughput capacity (enough throughput to handle up to 200 million requests per month) and 2.5 million read requests from DynamoDB

问题 In my Android app I use Amazon DynamoDB. I created 10 tables with Read capacity 10 and Write capacity 5. Today I received an email from Amazon. It costs me 11.36$. I don't understand the meaning of free tier. Here is what I read from Amazon: DynamoDB customers get 25 GB of free storage, as well as up to 25 write capacity units and 25 read capacity units of ongoing throughput capacity (enough throughput to handle up to 200 million requests per month) and 2.5 million read requests from DynamoDB

问题 This bounty has ended . Answers to this question are eligible for a +50 reputation bounty. Bounty grace period ends in 18 hours . san is looking for an answer from a reputable source . Usecase => Create two YARN queues: Q1 and Q2 with the configuration below. [ { "Classification": "capacity-scheduler", "Properties": { "yarn.scheduler.capacity.root.queues" : "Q1,Q2", "yarn.scheduler.capacity.root.Q1.capacity" : "60", "yarn.scheduler.capacity.root.Q2.capacity" : "40", "yarn.scheduler.capacity

问题 Suppose I have N M/M/1 queues in parallel where an arriving job is equally likely to join one of the N queues. We want to keep the probability for a job to wait less than 0.2. Given that we have an arrival rate of 400 jobs/second, and a processing times are exponentially distributed with mean 1 second, how many servers would be required? So my take on the question so far is: \lambda = 400 jobs/second \mu = 1 second \rho = (\lambda)/(k\mu) since we want to keep the probability of waiting less

问题 The capacity parameter in making a slice in Go does not make much sense to me. For example, aSlice := make([]int, 2, 2) //a new slice with length and cap both set to 2 aSlice = append(aSlice, 1, 2, 3, 4, 5) //append integers 1 through 5 fmt.Println("aSlice is: ", aSlice) //output [0, 0, 1, 2, 3, 4, 5] If the slice allows inserting more elements than the capacity allows, why do we need to set it in the make() function? 回答1: The builtin append() function uses the specified slice to append

问题 Why is the maximum capacity of a Java HashMap 1<<30 and not 1<<31, even though the max value of an int is 2 31 -1? The maximum capacity is initialized as static final int MAXIMUM_CAPACITY = 1 << 30; 回答1: Java uses signed integers which means the first bit is used to store the sign of the number (positive/negative). A four byte integer has 32 bits in which the numerical portion may only span 31 bits due to the signing bit. This limits the range of the number to 2^31 - 1 (due to inclusion of 0)

问题 If I do the following: List<GenericClass> listObj = new List<GenericClass>(100); // Do I need this part too? for (int i = 0; i < 100; i++) { listObj[i] = new GenericClass(); } Basically I am asking if the C# compiler will automatically fire the GenericClass constructor for each of the 100 GenericClass objects in the list. I searched in the MSDN documentation as well as here on StackOverflow. Thanks for any help. 回答1: That's not how List works. When you specify a capacity, it's an initial

问题 If I do the following: List<GenericClass> listObj = new List<GenericClass>(100); // Do I need this part too? for (int i = 0; i < 100; i++) { listObj[i] = new GenericClass(); } Basically I am asking if the C# compiler will automatically fire the GenericClass constructor for each of the 100 GenericClass objects in the list. I searched in the MSDN documentation as well as here on StackOverflow. Thanks for any help. 回答1: That's not how List works. When you specify a capacity, it's an initial

问题 According to the C++ standard, is std::vector<T>::pop_back() ever allowed to reduce the capacity of the vector? I am asking because I would like to have a guarantee, that the following code will not throw an out of memory exception: my_vec.pop_back(); if (...) my_vec.push_back(...); Assume that my_vec is an std::vector<int> . I guess there are three possibilities: Yes, this can happen according to both C++03 and C++11. No, C++11 prohibits this (but C++03 does not). No, both C++03 and C++11