On Fri, Jul 12, 2013 at 9:46 AM, Joshua D. Drake <jd@xxxxxxxxxxxxxxxxx> wrote:
Thank you Joshua.
Yep, if you are correct, and I believe you are, then obviously I was thinking of something else (this happens when you work on multiple systems I'm afraid). That would explain why I was having so much trouble finding something that wasn't there.
This will make our planning a bit easier because I now know what the limits currently are. I will be checking out Postgres-XC as well.
PostgreSQL itself does not support a distributed architecture. You may be thinking of Postgres-XC?
On 07/12/2013 07:23 AM, Melvin Call wrote:
Hello list,
Can anyone point me to some reading material on how auto-generated
sequence primary keys are handled on distributed systems? I think the
advice used to be to use GUIDs, but I thought I read somewhere that
PostgreSQL now assigns a pool of numbers to each node when a sequence is
implemented. I have searched the PostgreSQL 9.1.5 Documentation, but
apparently my search terms are not quite what it takes, or dreamt that up.
Sequences are local to each instances and it is not a pool, it is a 64bit allocation for each sequence within the local node, generally constrained only when called from the serial (big serial being 64 bits) type to 32 bits.
Sincerely,
Joshua D. Drake
Thank you Joshua.
Yep, if you are correct, and I believe you are, then obviously I was thinking of something else (this happens when you work on multiple systems I'm afraid). That would explain why I was having so much trouble finding something that wasn't there.
This will make our planning a bit easier because I now know what the limits currently are. I will be checking out Postgres-XC as well.
Regards,
Melvin
Melvin
