Re: [gentoo-server] SAN Clustered Filesystem

[Sean Cook]

OK... it looks like this is just fiber channel... do you have a fiber switch
or are you using direct connects?

In gentoo you will use a qlogic card and just boot the box... the luns that
are presented to the server will just show up as raw disk.  If you want to
get sexy with it, you multipath to set up dual channels to the same disk and
round robin your access to those disks.  This will require a bit more
knowlege of the XRaid and how it presents storage, but it should be
possible.  

If you are using a fiber switch you will want to create a zone from the
device to the nodes based on the wwn that you get off the qlogic interface
which should look something like this:

$ cat /proc/scsi/qla2xxx/0
...
SCSI Device Information:
scsi-qla1-adapter-node=200100e08ba84706;
scsi-qla1-adapter-port=210100e08ba84706;
scsi-qla1-target-0=50060482d52cead8;
...




On 25-Jan-2007, Brian Kroth wrote:
> We actually have an XRaid now sitting in a box.  I was simply going to
> purchase some fiber channel cards for the servers so they can attach to
> it via a QLogic fiber channel switch we have.  But once that's happened
> I want to make sure I can share the same storage pool with all, or
> perhaps just a subset, of the servers.  With OSX this required a special
> XSan client.  I have done very limited research so far to see what it
> would take to get a collection of Gentoo servers to do this, but figured
> I should ask and see if anyone could point me in some directions.
>
> Brian
>
> Sean Cook wrote:
> >I would actually spend a little more and start looking at iSCSI for
> >attached
> >storage.  You can generally pickup some decent chassis on ebay for not a
> >lot
> >of change and it gives you a lot more flexibility.
> >
> >GFS is ok if you don't want to mess around with a SAN but it has no where
> >near the performance of fiber or iSCSI attached storage.
> >
> >Here is exactly what I am talking about...
> >http://cgi.ebay.com/Dell-EMC-AX100i-iSCSI-12-Slot-SAN-Array-w-4x-250GB-HDD_W0QQitemZ300072200442QQihZ020QQcategoryZ111458QQssPageNameZWDVWQQrdZ1QQcmdZViewItem
> >
> >
> >On 25-Jan-2007, Brian Kroth wrote:
> >
> >>Hello all,
> >>
> >>I currently manage about 40 Window, OSX, and Hardened Gentoo servers.  I
> >>will soon have 12 P4 servers that were previously used as video encoders
> >>free as well as an Apple XRaid.  With all this spare hardware I thought
> >>I'd research setting up a cluster of servers running Apache for load
> >>balancing and high availability.  I'm also looking into a MySQL cluster,
> >>but that wouldn't require a shared filesystem.  I'm wondering if anyone
> >>has done something like this before and in particular knows a good
> >>filesystem to use so that each of the servers can access and potentially
> >>write to the same storage array.  I've accomplished the same thing with
> >>XServes running OSX, but they like to charge you a pretty penny for the
> >>XSan software that allows this which I thought I'd try to avoid if
> >>possible.  So far I've seen only GFS, but haven't gotten much reading
> >>done on it yet.  Any other tips or insights would be appreciated as well.
> >>
> >>Thanks,
> >>Brian
> >>--
> >>gentoo-server@g.o mailing list
> >>
> >>
>
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