設定 replica set 相關
初始化 replica set
var config = { _id : "repl", members : [ {_id : 0, host : 'repl1:27017'}] };
rs.initiate(config);
修改 replica set 設定
var config = rs.conf();
config.members[1].priority = 0;
rs.reconfig(config);
加入仲裁者
rs.addArb('replarb:27017');
權限相關
新增 user
db.createUser(
{
user: "username",
pwd: "password",
roles: [
'userAdminAnyDatabase',
'dbAdminAnyDatabase',
'readWriteAnyDatabase'
]
}
);
移除 user
db.removeUser('username');
現有 user 加入新權限角色
db.grantRolesToUser(
"backupuser",
[
{ role: "backup", db: "admin" },
{ role: "restore", db: "admin" }
]
);
Capped Collections
建立一個有大小/筆數限制的collection
官方文件: capped-collections
// set on create
db.createCollection( "<collection name>", { capped: true, size: <size in byte>[, max : <num of max documents>] } );
// set on exists
db.runCommand({"convertToCapped": "<collection name>", size: <size in byte>[, max : <num of max documents>]});
