How to start and cut MongoDB system logs

Source: Internet
Author: User
Tags install mongodb mongodb sharding

How to start and cut MongoDB system logs

When the mongos routing service is enabled during mongodb sharding, a log storage location is specified:
1 mongos -- configdb 127.0.0.1: 27019 -- logpath/var/log/mongodb/mongos. log -- pidfilepath/var/run/mongodb/mongos. pid -- logappend -- logRotate reopen -- fork

We have specified the log storage location in/var/log/mongodb/mongos. in the log file, when the system data volume is large and has been running for a long time, mongos. the log file will change to several GB, which will definitely affect the performance of mongos routing.
In this case, we can use the system's logrotate log auto-cutting service to change mongos. log File Size, go to cd/etc/logrotate. d/directory, create a file: touch mongos, edit and add the following content:
/Var/log/mongodb/mongos. log {
Rotate 1
Daily
Dateext
Size 200 M
Postrotate
/Bin/kill-SIGUSR1 'cat/var/run/mongodb/mongos. pid 2>/dev/null' 2>/dev/null | true
Endscript
}

A brief description of the above configuration is provided:
Size: specifies that when the mongos. log file exceeds MB, the file is automatically cut.
Dateext: Specifies the backup file naming method when a file is cut.
Rotate 5: Five archived logs are stored at a time. For the sixth archive, the most recent archive will be deleted.
Daily: log files are poll by day
Postrotate/endscript: After other commands are executed, execute the commands

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