2.使用4.2.x版本重启所有副本集实例 3.采用之前方式,在副本集primary节点执行(兼容性版本设置,会自动同步到副本集节点) 修改兼容性版本命令: db.adminCommand({setFeatureCompatibilityVersion:"4.2"}) 查看当前兼容性版本是否修改成功: db.adminCommand({getParameter:1,featureCompatibilityVersion:1}) 待所有副本集节点...
Get FeatureCompatibilityVersion To view thefeatureCompatibilityVersionfor amongodinstance, run thegetParametercommand on amongodinstance: db.adminCommand( { getParameter:1, featureCompatibilityVersion:1 } ) The output resembles: { featureCompatibilityVersion: {version:'5.0'}, ...
1 协议压缩(Wire Protocol Compression) 在3.6中Client和Server之间的通信协议增加了压缩功能，使得...
Feature Compatibility Version To upgrade to MongoDB 8.0 from a 7.0 deployment, the 7.0 deployment must havefeatureCompatibilityVersionset to7.0. To check the version: db.adminCommand( {getParameter:1,featureCompatibilityVersion:1} ) To upgrade to MongoDB 8.0, refer to the upgrade instructions specifi...
mongo>db.adminCommand({getParameter:1,featureCompatibilityVersion:1})>// 如果特性兼容版本小于4.0,则要设置为4.0>db.adminCommand({setFeatureCompatibilityVersion:"4.0"})>exit 初始化复制集 使用复制集的方法初始化复制集 代码语言:javascript 复制 mongo>rs.initiate()>rs.status()>exit ...
{ "FeatureCompatibilityVersion" : { "acquireCount" : { "r" : NumberLong(1) } }, "ReplicationStateTransition" : { "acquireCount" : { "w" : NumberLong(1) } }, "Global" : { "acquireCount" : { "r" : NumberLong(1) } } }, "waitingForFlowControl" : false, "flowControlStats" :...
注意,要进行流控制,副本集/分片集群必须具有:featureCompatibilityVersion (FCV) 4.2,并启用读关注多数。也就是说,如果FCV不是4.2,或者读关注多数被禁用,则启用的流控制没有效果。 启用了流控制后,当延迟增长到接近flowControlTargetLagSeconds时,主节点上的写操作必须先获取票据,然后才能进行写操作。通过限制每秒发出...
#引用形式的描述信息db.adminCommand( { getParameter: 1, featureCompatibilityVersion: 1 } ) 1. 2. 如果返回结果包含"supportsTransactions"字段,并且值为true,则表示该实例支持事务操作。如果不支持事务,则会出现“Transactions are not supported by this deployment”错误。
if (!opCtx->getClient()->isInDirectClient() && readConcernArgs.getLevel() != repl::ReadConcernLevel::kAvailableReadConcern && (iAmPrimary || ((serverGlobalParams.featureCompatibility.getVersion() == ServerGlobalParams::FeatureCompatibility::Version::kFullyUpgradedTo36) && ...
(each counted as a member) in the replica set type: integer featureCompatibilityVersion: description: FeatureCompatibilityVersion configures the feature compatibility version that will be set for the deployment type: string members: description: Members is the number of members in the replica set type...