Optionally enable in-use auto encryption可选地启用使用中的自动加密

Remarks

Automatic encryption is an enterprise only feature that only applies to operations on a collection. 自动加密是企业独有的功能，仅适用于集合上的操作。Automatic encryption is not supported for operations on a database or view, and operations that are not bypassed will result in error (see libmongocrypt: Auto Encryption Allow-List). To bypass automatic encryption for all operations, set bypassAutoEncryption=true in AutoEncryptionOpts.数据库或视图上的操作不支持自动加密，未绕过的操作将导致错误（请参阅libmongocrypt:自动加密允许列表）。要绕过所有操作的自动加密，请在AutoEncryptionOpts中设置bypassAutoEncryption=true。

Automatic encryption requires the authenticated user to have the listCollections privilege action.自动加密要求经过身份验证的用户具有listCollections权限操作。

If a MongoClient with a limited connection pool size (i.e a non-zero maxPoolSize) is configured with AutoEncryptionOptions, a separate internal MongoClient is created if any of the following are true:如果使用AutoEncryptionOptions配置了连接池大小有限（即maxPoolSize为非零）的MongoClient，则如果以下任何一项为真，则会创建一个单独的内部MongoClient:

• AutoEncryptionOptions.keyVaultClient is not passed.未传入。
• AutoEncryptionOptions.bypassAutomaticEncryption is false.为false。

If an internal MongoClient is created, it is configured with the same options as the parent MongoClient except minPoolSize is set to 0 and AutoEncryptionOptions is omitted.如果创建了内部MongoClient，除了minPoolSize设置为0并且省略了AutoEncryptionOptions之外，它将使用与父级MongoClient相同的选项进行配置。

The time in milliseconds to attempt a connection before timing out.超时前尝试连接的时间（以毫秒为单位）。

Allow a driver to force a Single topology type with a connection string containing one host允许驱动程序强制使用包含一个主机的连接字符串的单一拓扑类型

Allows a wrapping driver to amend the client metadata generated by the driver to include information about the wrapping driver允许包装驱动程序修改驱动程序生成的客户端元数据，以包含有关包装驱动程序的信息

Force server to assign _id values instead of driver强一致性务器分配_id值而不是驱动程序

heartbeatFrequencyMS controls when the driver checks the state of the MongoDB deployment. hearteatFrequencyMS控制驱动程序何时检查MongoDB部署的状态。Specify the interval (in milliseconds) between checks, counted from the end of the previous check until the beginning of the next one.指定检查之间的间隔（以毫秒为单位），从上一次检查结束到下一次检查开始计数。

The size (in milliseconds) of the latency window for selecting among multiple suitable MongoDB instances.用于在多个合适的MongoDB实例中进行选择的延迟窗口的大小（以毫秒为单位）。

The maximum number of connections that may be in the process of being established concurrently by the connection pool.连接池可能同时建立的最大连接数。

The maximum number of milliseconds that a connection can remain idle in the pool before being removed and closed.在删除和关闭连接之前，连接在池中可以保持空闲的最大毫秒数。

The maximum number of connections in the connection pool.连接池中的最大连接数。

Sets the minimum heartbeat frequency. In the event that the driver has to frequently re-check a server's availability, it will wait at least this long since the previous check to avoid wasted effort.设置最小检测信号频率。如果驱动程序必须频繁地重新检查服务器的可用性，它将在上次检查后至少等待这么长时间，以避免浪费精力。

The minimum number of connections in the connection pool.连接池中的最小连接数。

Enable command monitoring for this client对此客户端启用命令监视

TCP Connection no delayTCP连接无延迟

A primary key factory function for generation of custom _id keys用于生成自定义_id键的主键工厂函数

Enabling the raw option will return a Node.js Buffer which is allocated using allocUnsafe API.启用raw选项将返回使用allocUnsafe API分配的Node.js缓冲区。 See this section from the Node.js Docs here for more detail about what "unsafe" refers to in this context.请参阅Node.js文档中的这一部分，了解有关“不安全”在本文中所指内容的更多详细信息。 If you need to maintain your own editable clone of the bytes returned for an extended life time of the process, it is recommended you allocate your own buffer and clone the contents:如果您需要维护自己的可编辑字节克隆，以延长进程的使用寿命，建议您分配自己的缓冲区并克隆内容：

Example

const raw = await collection.findOne({}, { raw: true });
const myBuffer = Buffer.alloc(raw.byteLength);
myBuffer.set(raw, 0);
// Only save and use `myBuffer` beyond this point
Copy

Remarks

Please note there is a known limitation where this option cannot be used at the MongoClient level (see NODE-3946).请注意，有一个已知的限制，即此选项不能在MongoClient级别使用（请参阅NODE-3946）。 It does correctly work at Db, Collection, and per operation the same as other BSON options work.它在Db、Collection和每个操作中都能正常工作，与其他BSON选项的工作方式相同。

Specifies the name of the replica set, if the mongod is a member of a replica set.如果mongod是副本集的成员，则指定副本集的名称。

Enables retryable reads.启用可重试读取。

Enable retryable writes.启用可重试写入。

Specifies how long (in milliseconds) to block for server selection before throwing an exception.指定在引发异常之前阻止服务器选择的时间（以毫秒为单位）。

The time in milliseconds to attempt a send or receive on a socket before the attempt times out.在尝试超时之前，在套接字上尝试发送或接收的时间（以毫秒为单位）。

The maximum number of hosts to connect to when using an srv connection string, a setting of 0 means unlimited hosts使用srv连接字符串时要连接到的最大主机数，设置为0表示主机不受限制

Modifies the srv URI to look like:修改srv URI，使其看起来像：

_{srvServiceName}._tcp.{hostname}.{domainname}

Querying this DNS URI is expected to respond with SRV records查询此DNS URI应使用SRV记录进行响应

Bypasses validation of the certificates presented by the mongod/mongos instance绕过mongod/mongos实例提供的证书验证

Disables hostname validation of the certificate presented by the mongod/mongos instance.禁用mongod/mongos实例提供的证书的主机名验证。

Disables various certificate validations.禁用各种证书验证。

The maximum time in milliseconds that a thread can wait for a connection to become available.线程可以等待连接可用的最长时间（以毫秒为单位）。

An integer that specifies the compression level if using zlib for network compression.如果使用zlib进行网络压缩，则指定压缩级别的整数。