Re: [ZODB-Dev] ZODB replication and high-availability across data centers
we are currently investigating options for a large-scale solution where the machines (ZEO clients and ZEO server) should be separated across two data centers. Incoming traffic should be balanced between both data centers. Automatic failover and online-replication are desirable - high-performance is a must. The well-known options are: ZRS (ZEO) Relstorage on top of some RDBMS-related clustering/replication mechanism NEO DRDB ZEORaid We have not explicitly set something like this up; although our hosting partner has SAN replication between data centers. This is another solution; while low level - may be valid to explore. They use it with Oracle and MSSQLServer to do cross datacenter replication. cheers alan ___ For more information about ZODB, see the ZODB Wiki: http://www.zope.org/Wikis/ZODB/ ZODB-Dev mailing list - ZODB-Dev@zope.org https://mail.zope.org/mailman/listinfo/zodb-dev
Re: [ZODB-Dev] ZODB replication and high-availability across data centers
On Thu, 2010-10-21 at 18:07 +0100, Chris Withers wrote: On 21/10/2010 16:44, Andreas Jung wrote: The well-known options are: Relstorage on top of some RDBMS-related clustering/replication mechanism This is where I'd look, since the RDBMS guys likely have patterns that match the one you're seeking... True, but they also have SQL which can be replicated with much less overhead. Replicating at such a low level requires replicating whole objects even if a single attribute changes whether you use Relstorage or not. This is why I would consider replication at application level, especially in a limited bandwith environment. -- Roché Compaan Upfront Systems http://www.upfrontsystems.co.za ___ For more information about ZODB, see the ZODB Wiki: http://www.zope.org/Wikis/ZODB/ ZODB-Dev mailing list - ZODB-Dev@zope.org https://mail.zope.org/mailman/listinfo/zodb-dev
Re: [ZODB-Dev] ZODB replication and high-availability across data centers
On 10/21/2010 09:44 AM, Andreas Jung wrote: -BEGIN PGP SIGNED MESSAGE- Hash: SHA1 Hi there, we are currently investigating options for a large-scale solution where the machines (ZEO clients and ZEO server) should be separated across two data centers. Incoming traffic should be balanced between both data centers. Automatic failover and online-replication are desirable - high-performance is a must. The well-known options are: ZRS (ZEO) Relstorage on top of some RDBMS-related clustering/replication mechanism Six Feet Up is running RelStorage + MySQL + async replication for one of their customers. AFAIK, it works well. Also, I expect the new replication features in Postgres 9 to work well with RelStorage. Depending on what you're doing, balancing between data centers could be very complicated. You might start simple by directing traffic to only one data center at a time. Shane ___ For more information about ZODB, see the ZODB Wiki: http://www.zope.org/Wikis/ZODB/ ZODB-Dev mailing list - ZODB-Dev@zope.org https://mail.zope.org/mailman/listinfo/zodb-dev
