Re: MySQL on iSCSI or IPSAN?
In the last episode (May 22), Jeremy Zawodny said:
> On Wed, May 22, 2002 at 03:52:33PM +0800, Patrick Hsieh wrote:
> > Hello Dan Nelson <dnelson@allantgroup.com>,
> >
> > Is there any lock problem on iSCSI or SAN environment? Say,
> > mutliple mysql server mount the backend iSCSI or SAN storage
> > device. Is it safe?
>
> It is safe if you use MySQL's external (file) locking.
You will also need a filesystem that supports shared storage.
Sistina's Global File System (GFS) is the only such filesystem
available for Linux, afaik (at only $995 per node; shared storage is
NOT easy to implement). If you do not have such a filesystem, you will
most likely completely trash your filesystem when you mount it from the
2nd machine.
iSCSI/FibreChannel is not NFS. It is block-level access to raw storage
just like SCSI or IDE.
--
Dan Nelson
dnelson@allantgroup.com
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