At the database level, Exadata runs Oracle RAC, so I'd expect the same capabilities on Exadata as any other Oracle RAC environment (though the official answer here would have ot come from IBM). My understanding of Guardium is that it provides security and audit capabilities at the database level only, and not of, say, OS or storage. So I wouldn't consider Guardium alone to offer "complete" monitoring for any platform, including Exadata.
I don't work for Oracle, so I can't give an official response, but it should be fine. Because Exadata's database servers run a standard installation of OEL 5.5, I don't see why it wouldn't be supported, as long as it's supported on a standard Linux/Oracle install. Oracle does allow third party software to be installed on the database servers. It would not be supported on the storage cells, as Oracle's stance is that nothing can be installed on those.
File change monitoring on Exadata would work much the same way as on any other Oracle 11gR2 database running RAC and ASM. My question would be: what type of files are you looking to monitor for changes? In the Exadata context:
- Oracle datafiles, redo logs, control files, and parameter files are stored in ASM
- Archivelogs, flashback logs, etc are stored in the FRA, which is typically ASM as well
- Database software files, audit trail, and message logs are stored on local Linux ext3 filesystems
- Storage server software and logs are stored on storage servers. Oracle odes not permit third-party monitoring agents, such as Guardium, to be installed on storage servers. This is akin to most SAN vendors who do not allow third-party monitoring tools to run on SAN controllers either.
I am quite sure Oracle has never supported IBM's products and doubt that will change. IBM determines what versions their products will work with and does their own testing. Note also that Oracle doesn't support more-common software like backup software such as Legato Networker or Veritas Netbackup. The vendors of that software test and support their products, but Oracle doesn't support the products.