Why do we need Peta-byte datawarehouses?

The answer is to make the vendor companies to sell more CPUs and disks. The need is not originated from the financial market. In the financial market, the firms live on the periodical basis, monthly quarterly and yearly. When the year is ended, then the backups of the systems are taken and the life starts all over again.
If we need to archive data, it is best to take the BCV copy of the databases, instead of archiving tables.
We need to store around 2000 tables, yes it is too much, but the volume of the database is not too big.
Peta-byte DWHs can be used in Telcos, or other big datawarehouses other than financial sector.

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