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MapReduce actual case, MapTask operation mechanism, ReduceTask operation mechanism, MapReduce execution process, hadoop data compression, implementation of Join algorithm MapReduce actual case Reverse order of upstream traffic Cell phone number division MapTask operation mechanism Operation proces ...

netty chat explain: My thoughts demonstration Chat server Chat initialization configuration Client processing message Front end code epilogue explain: I found that it takes a lot of energy to write a blog. In order to leave more time for promotion, I just post the code. Learning address: https: ...

1. Background Log collection adopts ELK framework, i.e. elasticsearch, logstash, kibana, and filebeat component. Filebeat is used to scan log files and send logs to logstash service, while logstash service completes log segmentation and sends logs to elasticsearch service. 2. Deployment steps of filebeat (log - > logstash) Download the ...

client processing logic ConnectionPool netty related configurations are available in com.yahoo.pulsar.client.impl.ConnectionPool public ConnectionPool(final PulsarClientImpl client, EventLoopGroup eventLoopGroup) { this.eventLoopGroup = eventLoopGroup; this.maxConnectionsPerHosts = client.getConfiguration().getConnection ...

Case story: Bug videos are found during the test, which need to be provided for reference in the development of Bug solution, However, after video shooting, it is too large to be transmitted on wechat client, Therefore, there have been testers using winzip to compress in batches (part1, part2, part3), Then transmit the "chaos" of vid ...

1. Soft decoding implementation: JNIEXPORT int JNICALL Java_h264_Native_PlayLocalVideo(JNIEnv *env, jobject obj,jstring inputFilePath_,jobject surface) { const char *path = env->GetStringUTFChars(inputFilePath_, 0); av_log_set_callback(ffmpeg_android_log_callback); av_register_all(); int ret; AVFormatContext *fmt_ctx ...

Encrypt script first: import org.apache.commons.codec.binary.Base64; import java.io.ByteArrayOutputStream; import java.security.Key; import java.security.KeyFactory; import java.security.KeyPair; import java.security.KeyPairGenerator; import java.security.PrivateKey; import java.security.PublicKey; import java.security.Signature; i ...

In the previous article, we looked at what was done during the startup phase of a Dubbo service reference, and what was not seen during the remote invocation phase.The Dubbo service invocation process is complex and involves many steps, such as sending requests, codec, service demotion, filter chain processing, serialization, thread dispatch, ...

Video files such as MP4 are transformed into gif dynamic pictures Video files such as MP4 are transformed into gif dynamic pictures FFmpeg installation FFmpeg easy to use convert installation convert easy to use Video files such as MP4 are transformed into gif dynamic pictures ImageMagick image ...

Here is a summary of some of the more basic instructions for the kafka test I installed in the CDH. 1. Related Basic Contents Each host in the Kafka cluster runs a server called a proxy that stores messages sent to the subject and serves consumer requests. First, look at the instance information o ...