High Availability Linux with Software RAID
Using a combination of software RAID and a recovery CD, a high availability Linux server can be set up and configured easily. It is conceivable that a drive could fail, putting the RAID into degraded mode, without the system administrator knowing immediately. A cron job could be created to periodically examine the /proc/mdstat file and send an e-mail or page if the RAID volumes were found to be in degraded mode.
After testing with VMware, I used the same technique outlined above to install Red Hat 8.0 on my physical machine. I also went through the same testing procedure on the physical machine, including failing a pure RAID drive, failing the first mixed RAID and native drive, restoring RAID volumes in degraded mode, booting of the recovery CD, rebuilding the native partition and installing the boot loader on the MBR. It worked flawlessly, and my system has been reborn as an HA server.
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Until recently, IBM’s Power Platform was looked upon as being the system that hosted IBM’s flavor of UNIX and proprietary operating system called IBM i. These servers often are found in medium-size businesses running ERP, CRM and financials for on-premise customers. By enabling the Power platform to run the Linux OS, IBM now has positioned Power to be the platform of choice for those already running Linux that are facing scalability issues, especially customers looking at analytics, big data or cloud computing.
￼Running Linux on IBM’s Power hardware offers some obvious benefits, including improved processing speed and memory bandwidth, inherent security, and simpler deployment and management. But if you look beyond the impressive architecture, you’ll also find an open ecosystem that has given rise to a strong, innovative community, as well as an inventory of system and network management applications that really help leverage the benefits offered by running Linux on Power.Get the Guide