Re: High Availability: Hot Standby vs. Warm Standby

Hi,

Rob Wultsch wrote on 09.07.2010 18:14:
>> I am aware that I can use the 9.0 standby server for read only queries, but
>> that is (currently) not something we need
>>
>
> Taking SQL backups without impacting the master might be something to consider.

Interesting point. Thanks for mentioning that.


>> I'm wondering about the differences when the failover situation occurs. From
>> reading the docs, I get the impression that 9.0's streaming replication
>> might be faster than 8.4's WAL shipping, but otherwise offers the same level
>> of data protection.
>>
>> Is there a difference in how much data could potentially be lost in case of
>> a failover?
>
> 9.0 has streaming replication so much less data would likely be lost.
> WAL logs are generally 16 MB and often shipped when completed.

So my assumption is correct that streaming replication does mean that in case of a failover less transactions are lost?


Regards
Thomas