RE: Unique ID's across multiple databases

[Jerry Schwartz]

>-----Original Message-----
>From: vegivamp@stripped [mailto:vegivamp@stripped] On Behalf Of Johan De
>Meersman
>Sent: Monday, September 13, 2010 7:27 AM
>Cc: Max Schubert; mysql@stripped; replication@stripped
>Subject: Re: Unique ID's across multiple databases
>
>Hmm, that's a very interesting scenario, indeed.
>
>One bad connection will break the chain, though, so in effect you'll be
>multiplying the disconnecting rate...
>
>I think you'd be better of with a star topology, but MySQL unfortunately
>only allows ring-types. This is gonna require some good thinking on your
>part :-)
>
[JS] It sounds like you are trying to protect against a regional disaster.

This is precisely the type of scenario for which NAS or FibreChannel is used. 
You let the storage medium take care of replication. Typically you'd only need 
two units, perhaps on opposite sides of the country, using FibreChannel over 
IP.

I've been out of this market (sales/support side) for many years, so I don't 
know what the current technology costs, but if you can afford it that is the 
way to go. It will make your life much simpler.


Regards,

Jerry Schwartz
Global Information Incorporated
195 Farmington Ave.
Farmington, CT 06032

860.674.8796 / FAX: [phone]
E-mail: jerry@stripped
Web site: www.the-infoshop.com



>
>> This is actually more for failover scenarios where databases are spread in
>> multiple locations with unreliable internet connections. But you want to
>> keep every single location working even when they are cut off from the
>> other
>> databases. The primary purpose is not load distribution.
>>
>> On Mon, Sep 13, 2010 at 12:03 PM, Johan De Meersman <vegivamp@stripped
>> >wrote:
>>
>> >
>> >
>> >
>> >> offset + increment thingy is good if you know in advance that you'll
>> have
>> >> a
>> >> limited number of servers. But if you have no idea that you will have
> 2,
>> >> 20,
>> >> or 200 servers in your array in the future, you just can't pick an
>> optimal
>> >>
>> >
>> > What benefit do you think you will reap from that many masters ? Don't
>> > forget that every write still has to be done on every server, so you're
>> not
>> > actually distributing that load; while for reads you only need simple
>> > slaves.
>> >
>> >
>> > --
>> > Bier met grenadyn
>> > Is als mosterd by den wyn
>> > Sy die't drinkt, is eene kwezel
>> > Hy die't drinkt, is ras een ezel
>> >
>>
>
>
>
>--
>Bier met grenadyn
>Is als mosterd by den wyn
>Sy die't drinkt, is eene kwezel
>Hy die't drinkt, is ras een ezel