[Kamailio-Users] Redundancy and fault-tolerance

[Iñaki Baz Castillo]

El Martes, 3 de Marzo de 2009, Juha Heinanen escribió:
> Iñaki Baz Castillo writes:
>  > > what do you mean by not optimized? If the slave is not active (not
>  > > running) and one use DRDB just for synchronizing the data, how this
>  > > could be dangerous?
>  >
>  > Simpler than that. Forget DB replication stuff. I just mean that if
>  > you have a MySQL 1 with a large MyISAM table and you copy it to other
>  > server using "scp/rsync", you will get a non optimized or corrupted
>  > table (even if both servers have same CPU, architecture and file
>  > system).
>  >
>  > I've experimented it by copying with "rsync" a 2 GB long MyISAM table.
>  > After restarting the MySQL-2 and run a SQL command to check tables
>  > [1], you probably will get a "NOT OPTIMIZED TABLE" and you must to
>  > repair it. This is the best case.
>
> inaki,
>
> drdb keeps exact copy of the raw disk image of master on the slave.  it
> has nothing to do with copying of files.

Yes, for sure.
But in case of data corruption wouldn't it be very dangerous?


-- 
Iñaki Baz Castillo