Hi Wayne, If I am replicating the forests of US1 to US2 and EU2, what happens when US1 goes down ?
Which server will take over and server the US1 forests ? US2 or EU2 ? Regards, Danny On Wed, Jul 18, 2012 at 7:16 PM, Wayne Feick <[email protected]>wrote: > Yes, this should work fine. > > You'll have a master US-Database in the US, and a master UK-Database in > the UK, with each replicating to the site. Local-disk failover works fine > at both ends for both master and replica databases. > > Extending to a third site should also be fine, just keep in mind that a > network brown out to either of the replica sites will degrade your > foreground performance in order to enforce the lag limit. > > Wayne. > > > On 07/18/2012 12:40 PM, Danny Sinang wrote: > > Hi, > > We currently have a 3-node ML cluster here in the US (let's call them > US1, US2, US3), with forest replication and failover enabled. > > Should we need to expand to Europe, would the setup below achieve : > > 1. Traffic Localization (during normal operations) > 2. Continued ML availability (in the event we ever need to bring one > cluster down for hardware or software upgrades / fixes) > > > ? > > *Draft EU Expansion Plan* > > 1. Set up another 3-node ML cluster in Europe (EU1, EU2, EU3), with > forest replication and failover enabled. > > 2. Also replicate the forests of the US cluster to the EU clusters and > vice versa > > 3. Direct US customers (via some geo DNS) to US webservers which use > US1, US2, and US3 > - This would save US customer data to the forests on US1, US2, > and US3 > > 4. Direct EU customers to EU webservers which use EU1, EU2, and EU3 > - This would save EU customer data to the forests on EU1, EU2, > and EU3 > > 5. Should the US ML Cluster ever go down, point the US websevers to the > EU ML Cluster > - I'm hoping this would activate and make available the data from > US1, US2, and US3 on EU1, EU2, and EU3. Am I correct ? > - Same thing should happen the other way around (i.e. if EU ML > cluster goes down, point EU webservers to US ML cluster) > > > Do you think this would work ? > > Is there a better way to achieve our goals ? > > How do we extend this model should the time come for us to expand to > Asia ? > > Regards, > Danny > > > > > > > -- > Wayne Feick > Principal Engineer > MarkLogic [email protected] > Phone: +1 650 655 2378www.marklogic.com > > This e-mail and any accompanying attachments are confidential. The > information is intended solely for the use of the individual to whom it is > addressed. Any review, disclosure, copying, distribution, or use of this > e-mail communication by others is strictly prohibited. If you are not the > intended recipient, please notify us immediately by returning this message to > the sender and delete all copies. Thank you for your cooperation. > > > > > _______________________________________________ > General mailing list > [email protected] > http://developer.marklogic.com/mailman/listinfo/general > >
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