Re: Replication Factor Change
Hello OK i got it , so i should set CL to ALL for reads, otherwise data may be retrieved from nodes that does not have yet current record. Thanks for help. Yulian Oifa On Thu, Nov 5, 2015 at 5:33 PM, Eric Stevenswrote: > If you switch reads to CL=LOCAL_ALL, you should be able to increase RF, > then run repair, and after repair is complete, go back to your old > consistency level. However, while you're operating at ALL consistency, you > have no tolerance for a node failure (but at RF=1 you already have no > tolerance for a node failure, so that doesn't really change your > availability model). > > On Thu, Nov 5, 2015 at 8:01 AM Yulian Oifa wrote: > >> Hello to all. >> I am planning to change replication factor from 1 to 3. >> Will it cause data read errors in time of nodes repair? >> >> Best regards >> Yulian Oifa >> >
Re: Replication Factor Change
If you switch reads to CL=LOCAL_ALL, you should be able to increase RF, then run repair, and after repair is complete, go back to your old consistency level. However, while you're operating at ALL consistency, you have no tolerance for a node failure (but at RF=1 you already have no tolerance for a node failure, so that doesn't really change your availability model). On Thu, Nov 5, 2015 at 8:01 AM Yulian Oifawrote: > Hello to all. > I am planning to change replication factor from 1 to 3. > Will it cause data read errors in time of nodes repair? > > Best regards > Yulian Oifa >
RE: Replication Factor Change
Hello, If current CL = ONE, Be careful on production at the time of change replication factor, 3 nodes will be queried while data is being transformed ==> So data read errors! De : Yulian Oifa [mailto:oifa.yul...@gmail.com] Envoyé : jeudi 5 novembre 2015 16:02 À : user@cassandra.apache.org Objet : Replication Factor Change Hello to all. I am planning to change replication factor from 1 to 3. Will it cause data read errors in time of nodes repair? Best regards Yulian Oifa _ Ce message et ses pieces jointes peuvent contenir des informations confidentielles ou privilegiees et ne doivent donc pas etre diffuses, exploites ou copies sans autorisation. Si vous avez recu ce message par erreur, veuillez le signaler a l'expediteur et le detruire ainsi que les pieces jointes. Les messages electroniques etant susceptibles d'alteration, Orange decline toute responsabilite si ce message a ete altere, deforme ou falsifie. Merci. This message and its attachments may contain confidential or privileged information that may be protected by law; they should not be distributed, used or copied without authorisation. If you have received this email in error, please notify the sender and delete this message and its attachments. As emails may be altered, Orange is not liable for messages that have been modified, changed or falsified. Thank you.