for example, in a user group, a user can belong to multiple groups, and multiple users in a group need to do bidirectional caching because they need to obtain groupSet:getByUserId:xxx userSet:getByGroupId:xxx in both directions then role, permission r...
one database of user balance, one database of order table, one database of fund details users use balance to place orders, how to ensure that no more orders will be placed and the data are consistent in the case of large concurrency ...
At present, the company needs to build a remote monitoring and management system for a series of linux embedded devices, but this kind of equipment will be delivered to different users. is Zabbix suitable as a remote monitoring system in this case? Will ...
first of all, I intend to learn in depth about distributed related content, including spark,Hadoop cloud computing, as well as load balancing and service-oriented, to conduct in-depth and systematic learning. Of course, some aspects are familiar with an...
https: zh.wikipedia.org wiki. fail if the response message returned by any participant node in the first phase is "terminated ", or if the coordinator node is unable to get the response messages of all participant nodes before the query timeout o...
read the algorithms of consistent hash and hash slot and articles on the network that introduce them both. It is said that consistent hash needs less data to migrate than traditional hash when deleting node or and adding nodes. There is no problem here. ...
first of all, to introduce my situation, I have a physical machine as a master node, which is referred to as master later. There are also two additional servers, later known as node1 and node2. Where the docker node slave1-slave10, is configured on node...
how many physical machines can the RT,redis cluster support, and what is the system limit? ...
I deployed a fastdfs file cluster on five servers, assigned as follows: tracker1:117.48.231.77 tracker2:117.48.231.99 [group1] 117.48.231.94 117.48.231.88 [group2] 117.48.231.84 you can upload files to the storage of two group. but the prob...
redis master-slave replication is obviously different from clustering. The former is to provide redundancy and high availability, while the latter is to store data separately. Different redis nodes have different data. but mysql master slave and clu...
A lot of code that you don t like, turn it off. ...
private boolean termPredicate(HashMap<Long, Vote> votes, Vote vote) { SyncedLearnerTracker voteSet = new SyncedLearnerTracker(); voteSet.addQuorumVerifier(self.getQuorumVerifier()); if (self.getLastSeenQuorumVerifie...
Why does the above figure emphasize that "after the only participant who received the commit message is dead ", even if a new coordinator is elected, the transaction status cannot be determined personal total feeling: suppose there are three part...
recently, I have been reading the principle and practice of distributed consistency from Paxos to zookeeper. There is one thing I don t understand about CAP on page 12: I may have a big problem with my understanding of the first paragraph in the p...
what are the popular distributed frameworks in big factories now? ...
want to learn distributed preparation for job-hopping. I don t know where to start. Will zookeeper+dubbo only learn these two frameworks and ask the boss to show me the way? thank you ...
template: <template name="temp"> status {{status}} < template> then send in status when you use this template for the first time on this page. <template is="temp" data="{{status}}" < template> ...
recently, I was learning the flask framework. When I came into contact with the concept of "separation of front and rear ends ", I was very curious. I checked on the Internet and said that the front and rear ends exchange data through JSON. My personal ...
< el-upload class="upload-demo" ref="upload" action="http: add" name="Content" :data="form" :...
assume that the total duration of input.mkv is 35 minutes, and the video length cut with the following command is correct, which is 10 minutes: ffmpeg -ss 00:10:00 -to 00:20:00 -accurate_seek -i input.mkv -codec copy -avoid_negative_ts 1 -y output.mk...
first of all, here is my first piece of code: let testValue = this.state.testValue; this.setState({testValue: testValue + 1}); console.log(this.state.testValue); this.setState({testValue: testValue + 1}); console.log(this.state.testValu...