<\/p>\n
You can run commands on all the compute nodes or cell nodes from a single server on Exadata. We can use the dcli utility for this operation.<\/p>\n
Commands can be executed in parallel on desired servers with dcli utility. You can use it as follows.<\/p>\n
dcli [options] [commands]<\/pre>\nYou must configure Secure Shell (SSH) access without password between the server on which you are running dcli and the target servers.(SSH Connectivity)<\/p>\n
Use the -g parameter to specify the file that has the names of the destination servers are located. Also, with the-L parameter, we specify the user information to run the command on the target servers. If you do not specify a user with the -l parameter, the command will be executed\u00a0 with the user “celladmin” by default.<\/p>\n
First, create the file “dbs_group” which contains the host names of all db nodes and the file “cell_group” which contains the host names of all cell nodes.<\/p>\n
Sample Usages:<\/h3>\n
Running the hostname command on all db nodes and cell nodes:<\/strong><\/p>\n
[root@dbadm01 ~]# dcli -g dbs_group -l root 'hostname'\r\ndbadm01: dbadm01.local\r\ndbadm02: dbadm02.local\r\n\r\n[root@dbadm01 ~]# dcli -g cell_group -l root 'hostname'\r\nceladm01: celadm01.local\r\nceladm02: celadm02.local\r\nceladm03: celadm03.local<\/pre>\nQuerying cell status on cell nodes:<\/strong><\/p>\n
[root@dbadm01 ~]# dcli -g cell_group -l root 'cellcli -e list cell'\r\nceladm01: celadm01 online\r\nceladm02: celadm02 online\r\nceladm03: celadm03 online<\/pre>\nAs you can see, you can run a command on all servers from a single server and see the result. With this tool, it is possible to perform operations on Exadata very easily on a single server. dcli is an indispensable tool for Exadata.<\/p>\n\n
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