Chris,
Whether you're on-prem or in cloud...
* RAC, RAC one-node, and OS-level HA clusters (i.e.
Pacemaker/Corosync, etc) provide protection only to the /database
//service/, not to the /data/ in the database/
/
o RPO isn't a factor with service protection, as RPO is a
characteristic of /data protection//
/
* Restore/recovery from database backups can not guarantee RPO lower
than the initialization parameter setting for ARCHIVE_LAG_TARGET
o ...and there are many reasons to consider RPO to be at least
twice the ARCHIVE_LAG_TARGET value as well...
* Data replication utilities like GoldenGate, SharePlex, etc cannot
guarantee RPO=0 due to all the queuing and forwarding necessary
o "/eventual consistency/" also implies that "/eventual/" could
turn out to be "/never/"
The only Oracle mechanism which guarantees RPO=0 is DataGuard using MAX
PROTECTION mode, while DataGuard in MAX AVAILABILITY mode comes in with
a close second.
Even the Zero Data Loss Recovery Appliance (ZDLRA) essentially employs
the same mechanisms used by DataGuard MAX PROTECTION mode.
Please let me know what you think?
Thanks!
-Tim
On 9/23/2022 3:51 AM, Chris Taylor wrote:
Hey guys, recently started working at a new company that's moving their Oracle database to AWS.
One of the things they want is a near-0 RPO.
I was looking into AWS snapshot and replication to accomplish this which seems pretty doable.
Either in the same region or into another region in case the region was down/unavailable.
So I'm looking for two things:
1.) Other options? Active-Passive setup in 2 different regions? (Like Failover but non-RAC)
2.) Anyone using AWS and snapshot copies & replication for Oracle in AWS?
Reference:
(Taking snapshots)
https://aws.amazon.com/blogs/database/improving-oracle-backup-and-recovery-performance-with-amazon-ebs-multi-volume-crash-consistent-snapshots/
(Replicating Snapshots)
https://aws.amazon.com/blogs/aws/ebs-snapshot-copy/
Thanks,
Chris
