[Glass] [GS/SS Beta] Scale to multiple nodes sharing a DB?

[Norbert Hartl]

Am 15.11.2013 um 15:25 schrieb Mariano Martinez Peck <marianopeck at gmail.com>:

> Hi guys,
> 
> Thanks for the answers. That's what I wanted to hear!!! It is a good feeling to know that from the technical point of view we can scale a lot :) 
> 
Depends on what you call a lot :) Without knowing gemstone in depth I can easily say that distributing an unpartitioned memory space over multiple hosts and modifying state only within transactions has severe limits. So keep that in mind. 

Norbert

> 
> On Thu, Nov 14, 2013 at 9:05 PM, Dale K. Henrichs <dale.henrichs at gemtalksystems.com> wrote:
> Bruno,
> 
> The short answer is yes:)
> 
> Mutiple stones can be run on a single host. There is one SPC per stone per host.
> 
> So in a system with two stones running on host A, there will be two SPCs on host A.
> 
> You can connect to either of the stones running on host A from host B.
> 
> In the first form you can connect to a stone on host A and arrange for the rpc gems servicing your GemTools client (for example) to run on host A in which case those gems will connect to the SPC on host A.
> 
> In the second form you can connect to a stone on host A and arrange for the gems to run on host B (not permitted with Free license) in which case there will be an SPC on host B as well ... if you connect to both stones from host B in this fashion, then you'll have one SPC per stone on host B ...
> 
> tranlogs and extents must be on the "same filesystem" as the stone ... NFS filesystems are not reliable enouch to be used for extents and tranlogs ... non NFS, shared filesystems can be used for tranlogs and extents ...
> 
> Dale
> ----- Original Message -----
> | From: "BrunoBB" <smalltalk at adinet.com.uy>
> | To: glass at lists.gemtalksystems.com
> | Sent: Thursday, November 14, 2013 3:44:02 PM
> | Subject: Re: [Glass] [GS/SS Beta] Scale to multiple nodes sharing a DB?
> |
> | Hi,
> |
> | As i understad, ... each machine (with gems or the stone) has a
> | unique SPC
> | (shared page cache).
> | Is this correct ?
> | Gems in the same node (machine) access the same SPC, but for others
> | gems in
> | other node have their own SPC. Or a single node can run more than one
> | SPC ?
> | (may be this not make sense).
> |
> | Can the extents and the Stone run on different nodes ?
> | Can the translog and the Stone run on different nodes ?
> |
> | Regards,
> | Bruno
> |
> |
> |
> | --
> | View this message in context:
> | http://forum.world.st/GS-SS-Beta-Scale-to-multiple-nodes-sharing-a-DB-tp4722243p4722305.html
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> 
> -- 
> Mariano
> http://marianopeck.wordpress.com
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