Hi Kerry,
The issue here is that the TSM backup server (AIX? NT/Win2K?) won't be able to understand the WAFL filesystem structure. So the most that is theoretically possible is a raw LUN block dump (I don't think TSM supports that anyway).
What exactly do you mean by "SAN client"?
If by that you mean that you have virtualised disks (LUNs managed by the filer accessed via VLD, iSCSI or FCP) that are stored on your filer then yes, TSM may be able to mount the LUN as it will use a filesystem layout that such as NTFS or JFS that TSM will understand.
If however you mean FC block I/O access to a WAFL filesystem - which is what your post implies - then no, and it makes no sense to try. This is where NDMP will provide more value depending on the TSM version you are running.
If you can post to toasters or email me directly with more detailed configuration information (TSM version, OS versions, network configuration etc.) then I or someone else here can help with more specific advice.
What you probably want to do is give your filer a FC connection to your tape library so TSM can use NDMP to manage a "local" backup to the tape library from the filer. You will need to be careful with zoning on your FC switches. Also, only the Vixel 8100-NAS and some Brocade models of FC switch are officialy supported by NetApp for this configuration. (doesn't mean it won't work with other switches of course). AFAIK TSM 5 and later support this.
An alternative is to add a couple of NIC's and provide a dedicated [crossover, or through switch with jumbo frame support] gigabit link between the filer and the TSM server. Set your MTU size to 9014 bytes for this link, and use an IP range that does not exist on your LAN to prevent route table issues. (i.e. if your LAN is say 10.x.y.z use 192.168.y.z for the dedicated link). You should be able to get over 30MB/sec for NDMP transfers over this link, more than enough to keep an AIT3, SDLT or LTO drive busy. However, only the most recent versions of TSM (6.0? can't remember right now and I'm mobile, need to check) support NDMP data streaming over an ethernet link.
regards,
Alan.
-----Original Message----- From: Kerry Herschel To: toasters@mathworks.com Sent: 9/07/2003 4:51 PM Subject: access same files via SAN and NFS
Hi,
I'm interested in setting up a volume that a NFS client can write files to via an NFS mount point and our TSM backup server can backup via a SAN connection. Can I setup a volume that can be accessed by both a NFS client and a SAN client? Netapp tech support says no but when reading the documentation it sounds like I can do it. Has anyone done this?
Thanks for any input,
Kerry Herschel
================================================================ Margaret.K.Herschel@jpl.nasa.gov ICIS Jet Propulsion Laboratory Phone 818.354.1111
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