1. Create the mount points on all the nodes (as root user): # mkdir /goldengate 2. Connect to the ASM instance & create the ACFS diskgroup (from the +ASM1 instance): SQL> CREATE DISKGROUP ACFSTEST EXTERNAL REDUNDANCY DISK ‘ORCL:ASMDISK18’ SIZE 4157 M DISK ‘ORCL:ASMDISK19’ SIZE 4157 M ATTRIBUTE ‘compatible.asm’ = ‘11.2’, ‘compatible.advm’ = ‘11.2’; Diskgroup created. […]
Archives for December 2020
How to Check Storage Type in Engine Database (OLVM)
This is a small how-to post to check the storage type in Engine Database. Table storage_server_connections has all connections information. Run below command on OLVM to get the connection information: $ /usr/share/ovirt-engine/dbscripts/engine-psql.sh -c “select connection,iqn,port,storage_type from storage_server_connections;” connection | iqn | port | storage_type ——————————+—–+——+————– The field storage_type will give: value 1 for NFS value […]
How to set “max_report_luns” and “max_luns” on CentOS/RHEL 7 to scan more than 16,383 LUNs
From CentOS/RHEL 7, the default value of parameter max_report_luns has been increased from 512 to 16383. Consequently, CentOS/RHEL 7.x can now discover more than 511 LUNs when the system scans the SCSI interconnect using the Report LUNs mechanism. Increasing this value beyond 16383 is generally not required. But if you want to increase it, then […]
How to set “max_report_luns” and “max_luns” on CentOS/RHEL 6 to scan more than 512 LUNs
The default limit of maximum luns that can be presented in a CentOS/RHEL 6 is 512. But in many cases, you may want to increase this limit. There is a parameter of the SCSI core module to control the number of multiple LUNs. View Current Settings To view the current setting of “max_luns” parameter, use […]
How to Check the Size og yum Channels in CentOS/RHEL
Question: How to find out how large a yum channel repository is, to know how much data the channel will sync to a local yum repository? To see the actual size of the repository use either the ‘yum repolist -v‘ or ‘yum repoinfo‘ command. Example for checking the size of “CentOS-8 – AppStream” yum channel […]
How to Check vendor of installed RPM packages in Linux
This is a quick how-to post on checking the vendor of the installed rpms on a system. In some scenarios, a custom rpm package may not be compatible or supported on the specific system or environment. This post will help you identify the vendor of rpm which are either thrid party or not native to […]
TimeFinder SnapVX Concepts and SnapVX Operations
TimeFinder SnapVX Overview TimeFinder SnapVX provides a highly efficient mechanism for taking periodic point-in-time copies of source data without the need for target devices. Target devices are required only for presenting the point-in-time data to another host. Sharing allocations between multiple snapshots makes it highly space-efficient. A write to the source volume will only require […]
Repairing filesystem issues at Boot in CentOS/RHEL 7 and 8
This post focuses on manually repairing the file-system configuration or corruption issues that stop the boot process. Diagnosing and fixing file system issues Errors in /etc/fstab and corrupt file systems can stop a system from booting. In most cases, systemd drops to an emergency repair shell that requires the root password. The following table lists […]