Re: performance problem of Failover Datasource?

Feel free to send us a patch.

Dave

Dave Cramer

dave.cramer(at)credativ(dot)ca
http://www.credativ.ca

On Thu, Dec 13, 2012 at 6:42 AM, Chen Huajun <chenhj(at)cn(dot)fujitsu(dot)com> wrote:

> Hi All,
>
>
> In the latest jdbc driver,multi backends can be assigned in the URL as
> following.
>
> >With latest jdbc drivers you can simply configure multiple host:port
> pairs in the url separated by comma:
> >jdbc:postgresql://host1:**port1,host2:port2/test
> >It has only the most basic failover support. When a new connection is
> opened the hosts are tried in round-robin until a connection is
> successfully established.
>
> But there is a performance problem .if the first host is down,
> all connecting must be blocked until connect timeout at first,
> and then try connect to the next host.
>
> Why not adjust the order of hosts dynamically?
> For excample, after a successful connecting,if the target host is not the
> first host,
> swap the target host and the first host.
> And then subsequent connecting will try the most suitable host at first.
>
>
> --
> Best Regards，
> Chen Huajun
> (2012/12/12 17:09), kaprikorn07 wrote:
>
>> Hi All,
>>
>> As Bruce Adams has mentioned, please let me know if there is any other way
>> to do it other than pgBouncer and pgPool.
>>
>> Please help!
>>
>>
>>
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>>
>>
>>
>
>
>
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