validation是什么意思 Validation缩写
- 科技
- 2023-08-14 11:53:39
- 218
各位老铁们好,相信很多人对validation是什么意思都不是特别的了解,因此呢,今天就来为大家分享下关于validation是什么意思以及Validation缩写的问...
各位老铁们好,相信很多人对validation是什么意思都不是特别的了解,因此呢,今天就来为大家分享下关于validation是什么意思以及Validation缩写的问题知识,还望可以帮助大家,解决大家的一些困惑,下面一起来看看吧!
CRV批头是什么意思
CRV批头是CRV(ContainerReleaseValidation)标准中定义的一种类型,用于描述集装箱封闭批次的外观和状态。CRV批头是指集装箱封闭批次上的标识或标签,通常以特定的颜色、形状或图案来识别,用于指示该批次已经经过检查和验证,符合相关的标准和要求,可以进行货物的运输。CRV批头对于集装箱运输和国际贸易中的货物安全和质量控制非常重要。
mgr是什么意思
MySQLGroupReplication(下简称MGR)准确来说是官方推出的高知可用解决方案,基于原生复制技术,并以插件的方式提供。
1、使用前,关掉防火墙,包括selinux,firewalld,或者MySQL企业版的firewall(如果用了企业版的话)2、两台机器:(4台MySQL实例)192.168.2.219centos-ytt57-13311/3312192.168.2.229centos-ytt57-23311/33123、安装MySQL(两台都装),MySQLShell(任意一台),mysqlrouter(任意一台,官方建议和应用程序装在一个服务器上)yuminstallmysql-community-servermysql-shellmysql-router-community
4、搭建InnoDB-Cluster(两台都装)
1.配置文件如下:shell>vi/etc/my.cnfmaster-info-repository=tablerelay-log-info-repository=tablegtid_mode=ONenforce_gtid_consistency=ONbinlog_checksum=NONElog_slave_updates=ONbinlog_format=ROWtransaction_write_set_extraction=XXHASH642.系统HOSTS配置(两台都配)
shell>vi/etc/hosts
127.0.0.1localhostlocalhost.localdomainlocalhost4localhost4.localdomain4
::1localhostlocalhost.localdomainlocalhost6localhost6.localdomain6
192.168.2.219centos-ytt57-2
192.168.2.229centos-ytt57-3
用MySQLcoalesce函数确认下report-host是否设置正确(root@localhost):[(none)]>SELECTcoalesce(@@report_host,@@hostname)asr;+----------------+|r|+----------------+|centos-ytt57-1|+----------------+1rowinset(0.00sec)
3.创建管理员用户搭建GROUPREPLICATION(四个节点都要)
createuserrootidentifiedby'Root@123';grantallon*.*torootwithgrantoption;flushprivileges;
4.MySQLsh连接其中一台节点:
[root@centos-ytt57-1mysql]#mysqlshroot@localhost:3321
5.检查配置正确性:(如果这里不显示OK,把对应的参数加到配置文件重启MySQL再次检查)dba.checkInstanceConfiguration("root@centos-ytt57-2:3311");dba.checkInstanceConfiguration("root@centos-ytt57-2:3312");dba.checkInstanceConfiguration("root@centos-ytt57-3:3311");dba.checkInstanceConfiguration("root@centos-ytt57-3:3312");mysqlsh执行检测
[root@centos-ytt57-1mysql]#mysqlsh--log-level=8root@localhost:3311
MySQLlocalhost:3311sslJS>dba.checkInstanceConfiguration("root@centos-ytt57-2:3311")
{
"status":"ok"
}
6.创建集群,节点1上创建。(结果显示Clustersuccessfullycreated表示成功)
MySQLlocalhost:3311sslJS>varcluster=dba.createCluster('ytt_mgr');
Clustersuccessfullycreated.UseCluster.addInstance()toaddMySQLinstances.
Atleast3instancesareneededfortheclustertobeabletowithstandupto
oneserverfailure.
7.添加节点2,3,4(全部显示OK,表示添加成功)MySQLlocalhost:3311sslJS>cluster.addInstance('root@centos-ytt57-2:3312');MySQLlocalhost:3311sslJS>cluster.addInstance('root@centos-ytt57-3:3311');MySQLlocalhost:3311sslJS>cluster.addInstance('root@centos-ytt57-3:3312');
8.查看拓扑图:(describe简单信息,status详细描述)
MySQLlocalhost:3311sslJS>cluster.describe()
{
"clusterName":"ytt_mgr",
"defaultReplicaSet":{
"name":"default",
"topology":[
{
"address":"centos-ytt57-2:3311",
"label":"centos-ytt57-2:3311",
"role":"HA",
"version":"8.0.17"
},
{
"address":"centos-ytt57-2:3312",
"label":"centos-ytt57-2:3312",
"role":"HA",
"version":"8.0.17"
},
{
"address":"centos-ytt57-3:3311",
"label":"centos-ytt57-3:3311",
"role":"HA",
"version":"8.0.17"
},
{
"address":"centos-ytt57-3:3312",
"label":"centos-ytt57-3:3312",
"role":"HA",
"version":"8.0.17"
}
],
"topologyMode":"Single-Primary"
}
}
MySQLlocalhost:3311sslJS>cluster.status()
"clusterName":"ytt_mgr",
"defaultReplicaSet":{
"name":"default",
"primary":"centos-ytt57-2:3311",
"ssl":"REQUIRED",
"status":"OK",
"statusText":"ClusterisONLINEandcantolerateuptoONEfailure.",
"topology":{
"centos-ytt57-2:3311":{
"address":"centos-ytt57-2:3311",
"mode":"R/W",
"readReplicas":{},
"role":"HA",
"status":"ONLINE",
"version":"8.0.17"
},
"centos-ytt57-2:3312":{
"address":"centos-ytt57-2:3312",
"mode":"R/O",
"readReplicas":{},
"role":"HA",
"status":"ONLINE",
"version":"8.0.17"
},
"centos-ytt57-3:3311":{
"address":"centos-ytt57-3:3311",
"mode":"R/O",
"readReplicas":{},
"role":"HA",
"status":"ONLINE",
"version":"8.0.17"
},
"centos-ytt57-3:3312":{
"address":"centos-ytt57-3:3312",
"mode":"R/O",
"readReplicas":{},
"role":"HA",
"status":"ONLINE",
"version":"8.0.17"
}
},
"topologyMode":"Single-Primary"
},
"groupInformationSourceMember":"centos-ytt57-2:3311"
9.简单测试下数据是否同步
(root@localhost):[(none)]>createdatabaseytt;
QueryOK,1rowaffected(0.03sec)
(root@localhost):[(none)]>useytt;
Databasechanged
(root@localhost):[ytt]>createtablep1(idintprimarykey,log_timedatetime);
QueryOK,0rowsaffected(0.08sec)
(root@localhost):[ytt]>insertintop1values(1,now());
QueryOK,1rowaffected(0.04sec)
(root@localhost):[ytt]>showmasterstatus;
+---------------+----------+--------------+------------------+-------------------------------------------+
|File|Position|Binlog_Do_DB|Binlog_Ignore_DB|Executed_Gtid_Set|
+---------------+----------+--------------+------------------+-------------------------------------------+
|mysql0.000001|25496|||6c7bb9db-b759-11e9-a9c0-0800276cf0fc:1-41|
+---------------+----------+--------------+------------------+-------------------------------------------+
1rowinset(0.00sec)
查看其他三个节点
(root@localhost):[ytt]>showtables;
+---------------+
|Tables_in_ytt|
+---------------+
|p1|
+---------------+
1rowinset(0.00sec)
(root@localhost):[ytt]>select*fromp1;
+----+---------------------+
|id|log_time|
+----+---------------------+
|1|2019-08-0516:44:20|
+----+---------------------+
1rowinset(0.00sec)
停掉主节点:[root@centos-ytt57-2mysql0]#systemctlstopmysqld@0
现在查看,主节点已经变为本机3312节点"centos-ytt57-2:3312":{"address":"centos-ytt57-2:3312","mode":"R/W","readReplicas":{},"role":"HA","status":"ONLINE"}
10.报错处理
错误日志里显示2019-08-05T09:01:35.125591Z0[ERROR]Plugingroup_replicationreported:'Thegroupnameoptionismandatory'2019-08-05T09:01:35.125622Z0[ERROR]Plugingroup_replicationreported:'UnabletostartGroupReplicationonboot'
同时用cluster.rescan()扫描,发现Theinstance'centos-ytt57-2:3311'isnolongerpartoftheReplicaSet.
重新加入此节点到集群:cluster.rejoinInstance('centos-ytt57-2:3311')
再次执行cluster.status()查看集群状态:"status":"OK",11.移除和加入cluster.removeInstance("centos-ytt57-3:3312");Theinstance'centos-ytt57-3:3312'wassuccessfullyremovedfromthecluster.cluster.addInstance("centos-ytt57-3:3312");Theinstance'centos-ytt57-3:3312'wassuccessfullyaddedtothecluster.
12.用mysqlrouter生成连接MGR相关信息。涉及到两个用户:--user=mysqlrouter是使用mysqlrouter的系统用户自动创建的MySQL用户是用来与MGR通信的用户。如果想查看这个用户的用户名以及密码,就加上--force-password-validation,不过一般也没有必要查看。
validation set,什么意思
validationset验证集的意思。trainingset是用来训练模型或确定模型参数的,如ANN中权值等;validationset是用来做模型选择(modelselection),即做模型的最终优化及确定的,如ANN的结构;而testset则纯粹是为了测试已经训练好的模型的推广能力。当然,testset这并不能保证模型的正确性,他只是说相似的数据用此模型会得出相似的结果。
calibrationreport是什么意思
calibrationreport校准报告双语对照例句:1.Jointheopen,install,adjustandvalidationofnewproductiveequipment.Writetestrunningreportandcalibrationreportofrelativeinstrument.参与新生产设备的开箱、安装、调试和验证,填写调试报告和有关仪表的检定报告
ecv试验是什么
ecv试验(ExaminingCross-Validation)是一种机器学习中常用的评估模型效果的重要方法。它用于对模型训练效果进行测试,其基本思想为将训练数据集分为K份,依次选取其中K-1份作为训练集,剩余1份作为验证集,在这样的划分下重复进行K次,最后得到K次试验结果的平均值作为最终评估结果。
ecv试验可以有效防止模型出现过拟合的现象,可以准确评估模型的真实性能,是目前比较常用的机器学习模型评估方法之一。
投稿中审稿人提出validationexperiment是什么意思
validationexperiment释义验证试验validation英-[,v?l?'de???n]美-[,v?l?'de??n]释义n.确认;批准;生效
文章到此结束,如果本次分享的validation是什么意思和Validation缩写的问题解决了您的问题,那么我们由衷的感到高兴!
本文链接:http://wxnzbj.com/ke/761.html
上一篇:php在线教程视频 php在线