ASM in Oracle

What is ASM? ASM (Automatic Storage Manager) is in reality a volume manager (works with disk volumes or groups of disks) and is also a file system providing reference to data stored on disk (provides file layout to Oracle). ASM is an alternative to more conventional volume managers, file systems and raw devices. ASM is …

Oracle RAC Voting Disks and OCR

What are these things? I get asked this in interviews. I don’t know what they are, what they do, … I just install it. Is this a good interview question? I’ll tell you at the end of this posting when I’ve researched what these two things actually do. In theory, Oracle RAC is a database …