As you know security is one of the key points during database administration. In MongoDB sharded clusters security between components of the cluster is provided …

  Hello everyone, Today I want to talk about new auditing features on Oracle 12c. As you know in Oracle 11g and below versions there …

  In a replica set if one of the members is in RECOVERING state and in the log file of that member if you see: [crayon-698bd00049262446663003/]   …

  Hi guys, Today I want to talk about performance issues on MongoDB. As a dba you may informed by users or developers that the …

Sysaux tablespace is an auxiliary tablespace to the SYSTEM tablespace. If SYSAUX tablespace becomes unusable database functionality will remain operational. Occupants of the SYSAUX tablespace …

  Yesterday in one of our mongodb databases developer asked for unshard a sharded collection. Yes it is possible to unshard a sharded collection but …

  Before restoring database dumps to new servers we need to install MongoDB on each system. Step 1: Installation: [crayon-698bd00049c23067112300/]   inside it: [crayon-698bd00049c27965144465/] [crayon-698bd00049c29460153025/] …

  In sharded replicas before backup process you need to disable balancer and when backup finishes you need to enable the balancer. This process doesn’t …

  In MongoDB we can take backups with database dumps or filesystem snapshots. In large databases it is recommended to use file system snapshots rather …