I heard there exists a table hash clustering kind of concept in oracle but
never used it for IO reduction or performance improvement even in 100TB+
size oracle databases i worked on. But I see something matching that
thought below. Not sure , to what extent it's used/proved useful in real
life scenarios. Others may comment.
On Wed, Sep 22, 2021 at 12:19 AM Lok P <loknath.73@xxxxxxxxx> wrote:
Hello Listers, We have oracle exadata databases which are performing
mostly warehousing or batch type data processing. And few are hybrid i.e
combination of both oltp+warehousing/analytics types processing. ETL jobs
run on a few of these which move/read/write billions rows daily.
The databases are 50TB to ~150TB in size currently. Few architecture
team members suggested evaluating if we can use columnar database type of
offering for IO reduction and thus better performance considering the
future growth. As per my understanding , Oracle stores data in row format
only, so is there any other offering from Oracle for columnar datastore
format or columnar databases and we should evaluate that? Or is there any
clustering kind of technique which can be evaluated which will help reduce
IO? Want to understand experts' views here on this.