November 2021
Intermediate to advanced
410 pages
12h 1m
Chinese
Content preview from MongoDB权威指南（第3版）
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336
｜
第
20
章
function updateEmployeeInfo(session) {
employeesCollection = session.getDatabase("hr").employees;
eventsCollection = session.getDatabase("reporting").events;
session.startTransaction( {writeConcern: { w: "majority" } } );
try{
employeesCollection.updateOne( { employee: 3 },
{ $set: { status: "Inactive" } } );
eventsCollection.insertOne( { employee: 3, status: { new: "Inactive",
old: "Active" } } );
} catch (error) {
print("Caught exception during transaction, aborting.");
session.abortTransaction();
throw error;
}
commitWithRetry(session);
}
20.5
MongoDB
不能保证什么
MongoDB
在一些情况（比如存在硬件问题或文件系统错误）下无法保证持久性。特别是，
如果硬盘损坏，则
MongoDB ...
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