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This article for those who just jump into MongoDB ocean from RDBMS world. First of all, I can tell you do not start finding stuff which usually support by RDBMS into MongoDB. When you decided to start learning MongoDB then Continue readingMongoDB auto increment field→

Before starting any mongodb administration job, we need to know very well about the system, where MongoDB is going to deploy. For this article I choose very common linux OS Ubuntu. Target readers should not be only for mongodb dba, Continue readingLinux directory structure, user, group, permission, ownership etc.→

As we probably all know, shell script is badly required, when you thought to automate something in your operating system. We are here using Born shell(sh) and bash in linux ubuntu. cat /etc/shells #it will give us following shells /bin/sh Continue reading1. Shell script comment variable and wildcard→

Often we saw that after making individual machine better (Scale up) or distributed the data into shards (Scale Out) or making all read queries route to secondary replica set, yet the queries are not performing well and getting the bottleneck. Continue readingMongoDB query optimization→

CommandDescriptionExample&Run the previous command in the backgroundls &&&Logical ANDif [ “$X” -ge “0” ] && [ “$X” -le “9”]||Logical ORif [ “$X” -lt “0” ] || [ “$X” -gt “9” ]^Start of linegrep “^X”$End of linegrep “X$”=String equality (cf. -eq)if Continue reading3. Shell comparison operator & reference→