pool

问题 For my college project I am trying to develop a python based traffic generator.I have created 2 CentOS machines on vmware and I am using 1 as my client and 1 as my server machine. I have used IP aliasing technique to increase number of clients and severs using just single client/server machine. Upto now I have created 50 IP alias on my client machine and 10 IP alias on my server machine. I am also using multiprocessing module to generate traffic concurrently from all 50 clients to all 10

问题 I need to manage long running TCP socket connections to an external server from my Java application. I'm looking for a good socket pool so I will be able to re-use the sockets. Are there any suggestions? 回答1: You could have a look at building a socket pool on top of Commons Pool. 回答2: Koders.com has an implementation here. I can't vouch for it's functionality, however, so you should run a few tests on it. 来源： https://stackoverflow.com/questions/938784/good-client-socket-pool

问题 I want to dimension RAM dependent on the innodb_buffer_pool_size. But all what I find is the dependence of the innodb_buffer_pool_size on RAM. Can you tell me on which parameters on the innodb_buffer_pool_size depends? Number of queries? Number of transactions? I want to find out the formula which calculates the RAM dependent on innodb_buffer_pool_size. Can you help me? Thank you very much for your advice! 回答1: Sizing innodb_buffer_pool_size : If all the queries/transactions are touching tiny

问题 I am trying to load numpy files asynchronously in a Pool: self.pool = Pool(2, maxtasksperchild = 1) ... nextPackage = self.pool.apply_async(loadPackages, (...)) for fi in np.arange(len(files)): packages = nextPackage.get(timeout=30) # preload the next package asynchronously. It will be available # by the time it is required. nextPackage = self.pool.apply_async(loadPackages, (...)) The method "loadPackages": def loadPackages(... (2 strings & 2 ints) ...): print("This isn't printed!') packages

问题 I have a java process that starts about 60 threads that each access a MySql database. Would I benefit from using a Connection Pool like C3P0? Or is it meant only for Web apps (that scale to lots of users) ? Today we have long-living JDBC Connections (one per thread), and my plan was to instead get a Connection from the Connection Pool before every SQL query/insert. I wonder whether that would make our application more stable? Also, if I configure it to match the max number of connections in

问题 I'm using multiprocessing , and specifically a Pool to spin off a couple of 'threads' to do a bunch of slow jobs that I have. However, for some reason, I can't get the main thread to rejoin, even though all of the children appear to have died. Resolved: It appears the answer to this question is to just launch multiple Process objects, rather than using a Pool . It's not abundantly clear why, but I suspect the remaining process is a manager for the pool and it's not dying when the processes

问题 I have an existing java/scala application using a global thread pool. I would like to start using actors in the project but would like everything in the app using the same pool. I know I can set the maximum number of threads that actors use but would prefer sharing the thread pool. Is this necessary/reasonable, and is it possible to designate the actor's thread pool? If it is not possible/recommended, are there any rules of thumb when integrating actors in apps that are already using threads?

问题 Have a task: create 10 sphere objects, put them in pool; on each click got each sphere from pool and show to user at cursor intersection point. Problem: can't figure how to properly create and after this, put it to pool. Please check code below. Currently each sphere create dynamicly like this: (in a-scene on click event) let {x, y, z} = event.detail.intersection.point sceneEl.insertAdjacentHTML('beforeend', `<a-sphere data-coords="[${x}, ${y}, ${z}]" data-clickable position="${x} ${y} ${z}"

问题 I have one couchdb database and I am querying it in parallel. Now, I want to create a connection pool, because I discovered a bottleneck in my design - I was using a single instance of couchd , so parallelization was failing due to that. I searched the web for connection pool implementations, but I was not able to find a proper java connection pool implementation for couchdb - most of the frameworks support relational databases. I will be appreciated if someone can help me for that. 回答1: I've

问题 How can I implement a connection pooling in Java? There is some pattern? I should use some connections and release it. This connection should be closed after a few times. 回答1: You can use some libraries. For JDBC connection pooling check out bonecp, c3p0 or dbcp. If you need a general purpose pooling, see commons Pool, which dbcp is built on. 来源： https://stackoverflow.com/questions/12640608/connection-pooling-pattern