Database & Cloud

Last night I installed the latest NexentaStor Community Edition (5.2.1) and tried to create an iSCSI target then added it to some ESXi nodes to build my home lab environment. At the beginning I though...

Today one customer said the data sync of Oracle Dataguard had issue and our guys checked the alert log then sent below errors to me: ORA-01034: ORACLE not available ORA-27102: out of memory Linux-x86_...

I provided a 12c RAC step-by-step installation guide to client and he got issue during the deployment. Be specific, he failed the SSH User Equivalency: [grid@rac122-1 ~]$ ssh -o FallBackToRsh=no -o Pa...

These days my friend Zhiguo discussed with me about the vote disk issue of Normal Redundancy ASM disk group and I found maybe I made a big mistake. Nowadays more and more customers install two SSD dis...

I got big trouble when I tried to deploy the Exadata test environment on my laptop and I found one possible solution maybe was to enable the UEFI boot mode. When I installed Win10 on my laptop, it cre...

Several weeks ago I patched a 12.2 Oracle RAC and got several issues, I realized there were some key points I should follow during the RAC patching and list them here. 1. When patching the whole syste...

In last week I upgraded my laptop from T420s to E485 to get maximum 32G memory also because the T420s was so old and the cooling system worked inefficiently, so during the summer it would become slowe...

Good news for me. :) Will keep hard working on that and hope one day I could build my own business through it.

Normally when we restore the hot backup of a database, we will recover and open it with resetlogs option because during the restore procedure we have to restore the control file first. Last week I got...

Sometimes, when I installed the Oracle GI and run the asmca, I could create volume and acfs easily, while I never know the background of such things. This time, I need to create a shared cluster files...