As you might know, if disk partitions containing Oracle datafiles are not aligned with the underlying storage system, then some I/O’s can suffer from some overhead as they are effectively translated in two I/O’s. If you want more info, google…
How does Oracle keep data consistent on filesystems?
Sometimes there is questioning on how EMC can provide consistent snapshots on storage systems, given the fact that file systems like ext3, ufs and the like may keep write data in file system (server) cache.
Information Lifecycle Management and Oracle databases – part 3
Archiving and purging old data In the end, if you want to seriously reduce the effective size of a database (after using all innovations on the infrastructure level) is to move data out of the database on to something else.…
Information Lifecycle Management and Oracle databases – part 2
Database compression Another technique that Oracle has improved as of version 11g is compression. In versions up to 10g you could only compress an entire table, and after that, random performance on a compressed table was poor. It…
Information Lifecycle Management and Oracle databases – part 1
This is an article I wrote a while ago (late 2009), a while after EMC introduced Enterprise Flash Drives (EFD’s). Although more tooling is available these days to automate the tiering of storage, the basic concepts are still very valid,…