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Fwd: Re: PSQL, Mosix is unuseful

From: "valter m" <maweb(at)hotmail(dot)com>
To: pgsql-hackers(at)postgresql(dot)org
Subject: Fwd: Re: PSQL, Mosix is unuseful
Date: 2000-11-01 15:04:45
Message-ID: (view raw, whole thread or download thread mbox)
Lists: pgsql-hackers
Hello everyone,

no hope to use PostgreSQL + Mosix, because PostgreSQL uses shared memory, as 
such it's not suitable for migration.

Mosix isn't able now to give us a single system image, where a cluster of 
machine acts as a single transparent machine.

I'm trying DIPC+GFS to do this, i've patched the 2.2.17 linux kernel with 
DIPC , changed PostgreSQL sources to create distributed shared memory and 
semaphores (postgres uses only sem and shm), next steps are to try to 
start-up (the changed) postgres to use this  distibuted ipc and a central 
location for datafiles (GFS , NFS?, or a thing that permits a shared fs with 
flock and fcntl) , then do a simple connect script that , for example , do a 
round-robin connection to the different postgresql servers on the machineS.

DIPC has not a failover mechanism now.



>From: Johan Sjholm <Netmaster(at)streetwise(dot)se>
>To: "Mosix List" <mosix-list(at)cs(dot)huji(dot)ac(dot)il>
>Subject: PSQL
>Date: Wed, 1 Nov 2000 14:09:34 +0100
>Hello everyone,
>Anyone that has tryied PostgreesSQL under Mosix ? How well does it run ?
>Just checking before I get going whit it;)
>And I am also going to run Apache on those machines, will that work any 
>good ?
>Whit friendly Regards
>- Johan
>To unsubscribe, send message to mosix-list-request(at)cs(dot)huji(dot)ac(dot)il
>with "unsubscribe" in the message body.

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