Hi Thouraya, In all versions of Cassandra, each query will have one coordinator. Any node in the cluster can be the coordinator and this is choice is made by the client/driver. The coordinator may or may not have a replica of the data being requested.
Cheers, Alec Collier | Workplace Service Design Corporate Operations Group - Technology | Macquarie Group Limited • From: Thouraya TH [mailto:thouray...@gmail.com] Sent: Wednesday, 19 August 2015 2:48 AM To: user@cassandra.apache.org Subject: Question: Coordinator in cassandra Hi all; Please with the version cassandra 2.0.6, we have by default one coordinator per data center, per client or per query ? Thank you so much for help. Kind Regards. This email, including any attachments, is confidential. If you are not the intended recipient, you must not disclose, distribute or use the information in this email in any way. If you received this email in error, please notify the sender immediately by return email and delete the message. Unless expressly stated otherwise, the information in this email should not be regarded as an offer to sell or as a solicitation of an offer to buy any financial product or service, an official confirmation of any transaction, or as an official statement of the entity sending this message. Neither Macquarie Group Limited, nor any of its subsidiaries, guarantee the integrity of any emails or attached files and are not responsible for any changes made to them by any other person.
