Subscribe to Posts by Email

Subscriber Count

    696

Disclaimer

All information is offered in good faith and in the hope that it may be of use for educational purpose and for Database community purpose, but is not guaranteed to be correct, up to date or suitable for any particular purpose. db.geeksinsight.com accepts no liability in respect of this information or its use. This site is independent of and does not represent Oracle Corporation in any way. Oracle does not officially sponsor, approve, or endorse this site or its content and if notify any such I am happy to remove. Product and company names mentioned in this website may be the trademarks of their respective owners and published here for informational purpose only. This is my personal blog. The views expressed on these pages are mine and learnt from other blogs and bloggers and to enhance and support the DBA community and this web blog does not represent the thoughts, intentions, plans or strategies of my current employer nor the Oracle and its affiliates or any other companies. And this website does not offer or take profit for providing these content and this is purely non-profit and for educational purpose only. If you see any issues with Content and copy write issues, I am happy to remove if you notify me. Contact Geek DBA Team, via geeksinsights@gmail.com

Pages

18c Database : Oracle Sharding Enhancements

Some important enhancements to Oracle Sharding.

Now Supports CDB with a single PDB attached to it

  • GSDCTL has new commands “add cdb”
  • Supports CDB which has only one CDB

User Defined Sharding methods

  • In previous releases the tablespaces are related to a tablespace set
  • In user defined sharding , we can specify our own tablespaces
  • Then add those tablespaces to shardspace
  • Then add the shards, shard catalog

Consistency Levels for Multi Shard Queries –

  • Initialization Parameter MULTISHARD_QUERY_DATA_CONSISTENCY
  • Strong - SCN synchronization is performed across all shards
  • Shard_local - SCN synchronization is not performed across all shards. Data is consistent within each shard
  • Delayed_standby_allowed - SCN synchronization is not performed across all shards. Data is consistent within each shard. This setting allows data to be fetched from Data Guard standby databases when possible

Thanks

Suresh

Comments are closed.