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Very discordant fork multi-threadedContinue the topic of the previous few days. Do a fantastic West Tour server optimizer thing. Previous code, the work of a regular disk two steps, the dynamic Data in the VM serialization, and then the serialized data write disk. In these two steps, the serialization work is not done independently in a separate thread/process, but on the main thread. The IO section is in a separate process.Serializing a task is a tedious process. Very time consuming (as opposed

length of 4294967295, is fully sufficient, so directly 4 bytes 0 buffer.writeuint32be (0, 2); Buffer.writeuint32be (length, 6); } else if (length >) { buffer[1] = 126;//longer than 125 is represented by a 2-byte buffer.writeuint16be (length, 2); } else { buffer[1] = length; } writes the body buffer.write (message, index); This.socket.write (buffer);};In addition to the realization of a function, is heartbeat detection: To prevent the ser

fputs (inip, out );} Fclose (fp ); Fclose (out ); 　　 } 　　 Using gcc in linux? O trans. c compiled by generating the file trans, 　　 The configuration of dns2go. conf is as follows: # # Simple configuration file for DNS2Go linux client # # For more information refer to the dns2go. conf manual page 　　 # # GLOBAL ctictives # # DNS2Go Server Server = discovery.dns2go.com 　　 # Key (required, case-sensitive) Key = aaaaaa-bbbbbb-ccccccc-ddddd (this is the activ

, timeout requests waiting too long, user experience is very poor. improved: In order to improve the request timeout after long connection loss, the client has added a ping frame heartbeat mechanism for okhttp, the process is as follows: (1) client based on http/ 2 Protocol for network communication, HTTP/2 from the bottom to achieve multiplexing, multiple requests to share a link to request, when the client is idle, the link remains alive. (2) to implement a fixed interval to send ping frame

received the return information of the client after 10 heartbeats (that is, ticktime) length. The total length of time is 10*2000=20 seconds.Synclimit: This configuration item identifies the length of time that a message, request and response is sent between Leader and Follower, the maximum number of ticktime, and the total length of time is 5*2000=10 seconds.Ticktime: This time is the time interval between the Zookeeper server or between the client

connection to the Kafka cluster. -Spring.kafka.consumer.client-id= # ID to pass to the server when making requests. Used forserver-side logging. +spring.kafka.consumer.enable-auto-commit= # Whether The consumer ' s offset is periodically committed in the background. -spring.kafka.consumer.fetch-max-wait= # Maximum amount of time the server blocks before answering the fetch requestifThere isn ' t sufficient data to immediately satisfy the requirement given by "fetch.min.bytes". +Spring.kafka.con

the Zookeeper server, but the Zookeeper server cluster is connected to theLeader Follower Server) The maximum number of heartbeat intervals that can be tolerated when a connection is initialized. The client connection failed when the Zookeeper server has not received the return information of the client after 10 heartbeats (that is, ticktime) length. The total length of time is 5*2000=10 seconds.Synclimit: This configuration item identifies the lengt

3des_ede_cbc_sha"connectiontimeout=" 20000 "executor=" Tomcatthreadpool "keystorefile=" ${bio-vmssl.keyfile.name} "keystorePass=" ${ Bio-vmssl. Ssl.password} "keystoretype=" PKCS12 "maxkeepaliverequests=" [port= "${bio-vmssl.https.port}" protocol= "HTTP/1.1" Redirectport= "${bio-vmssl.https.port}" scheme= "https" secure= "true" >Note: Add only the red text as indicated and does not change any other options. This adds back support for less secure cipher strengths for backward compatibility purpo

to the other Zone Registration center, network delay is relatively large, heartbeat detection is likely to be problematic.(2) Service invocation: To ensure preferential invocation of services within the same zone, only when the service within the same zone is not available, to call the service of the zone.1. configuration file for service registrationeureka: client: prefer-same-zone-eureka: true #地区 region: beijing availability-zones: beijing: zone-1,zone-2 service-url: zone-1: http://lo

participate in the leader vote. Zookeeper Configuration Introduction: Ticktime: The base event unit, in milliseconds. This time is the time interval between the zookeeper server or between the client and the server to maintain heartbeat, that is, each ticktime time will send a heartbeat. DataDir: The location of a snapshot of a database in memory, as the name implies, is the directory where the data is stored zookeeper, by default, zookeeper writes the log file of the data is also saved in t

issue of efficiency. Whether it's a client or a server, if it's a long connection, a program needs at least two threads, one for receiving data, one for sending heartbeats, and for writing data that does not require specializedthreads, of course, also require a class of threads (commonly known as worker threads) for processing messages, which means that the receiving thread is only responsible for receiving data and then sending it to the worker for

subscriber may not be able to find it for the longest time after 30s. Service startup after Eureka, together with a list of services to the local cache, services registered update, Eureka will be pushed to each service. Eureka also has strategies to prevent the avalanche of all service heartbeats caused by the instability of a service's network. Eureka has a Web page that allows you to see all the service registrations and Eureka cluster status on th

client connection failed when the Zookeeper server has not received the return information of the client after 10 heartbeats (that is, ticktime) length. The total length of time is 10*2000=20 seconds Synclimit: This configuration item identifies the message sent between Leader and Follower, the length of the request and response time, the maximum length of time that can not exceed how many ticktime, the total length of time is 5*2000=10 seconds D Ata

over 100KB in the last 5 minutes then the trigger expression will return true Example Five Trigger Name: Both nodes of clustered SMTP server is down {smtp1.zabbix.com:net.tcp.service[smtp].last (0)}=0{smtp2.zabbix.com:net.tcp.service[smtp].last (0)}=0 When the SMTP server on both Smtp1.zabbix.com and smtp2.zabbix.com two hosts is offline, the expression returns TRUE. Example Six Trigger Name: Zabbix Agent needs to be upgraded Use the function str (): {zabbix.zabbix.com:agent.version.str

=cloud02:2888:3888 server.3=cloud03:2888:3888 server.4=cloud04:2888:3888 server.5=cloud05:2888:3888 where Server. X represents the machine that makes up the entire service, and when the service starts, it finds the file myID in the data directory, which contains the server's number. Initlimit:This configuration item is used to configure the Zookeeper accept client (the client here is not the client that connects the Zookeeper server, but the Zookeeper server cluster that is connected to the

between nodes:? is connected to the switch above, in general, will ensure that the normal instances continue to serve, but sometimes if the OS too late to send the NIC status to Oracle, it is also possible to cause two nodes are down.? If it is a direct connection, it will cause two instances to be down.CSS HeartbeatOCSSD This process is clusterware the most critical process, if the process is abnormal, will cause the system to restart, this process provides the CSS (Cluster Synchronization Ser

://s3.51cto.com/wyfs02/M02/89/F9/ Wkiol1gjabbcjwd0aaa_yqj8vzo980.jpg "width=" 558 "height=" 127 "/>4, using the same way to create the network card, confirm that two SQL sub-machine can obtain the NIC (three pieces, 1 pieces of production, 1 heartbeats, 1 pieces of storage), here stole the lazy under the internal system to see the corresponding relationship is correct:650) this.width=650; "Style=" background-image:none;padding-left:0px;padding-right:0

. Slave_heartbeat_period Global The heartbeat interval for replication Slave_open_temp_tables Global Number of temporary tables opened from the server Slave_received_heartbeats Global Number of heartbeats from the server Slave_retried_transactions Global Thread attempts to copy lines from the server since this startup Slave_running G

Label:What are the brain fissures in Oracle Clusterware and RAC From:What's Split Brain in Oracle clusterware and Real application Cluster (document ID 1425586.1) Suitable for:Oracle database-enterprise edition-version 10.1.0.2 and laterInformation in this document applies to any platform. Objective:This article explains the brain fissures in Oracle Clusterware and RAC, as well as the errors and results associated with brain fissures. Details:In general terms, the brain fissure indicates inconsi

cause two nodes are down.? If it is a direct connection, it will cause two instances to be down.CSS HeartbeatOCSSD This process is clusterware the most critical process, if the process is abnormal, will cause the system to restart, this process provides the CSS (Cluster Synchronization Service) services. The CSS service monitors the status of the cluster in real time through a variety of heartbeat mechanisms, providing basic cluster service functions such as brain crack protection.The CSS servi