Greetings, I have a customer running TSM 6.1.3 on a Linux RedHat 5.4 server. They are using high-performance SAN attached disk for the TSM database and logs. They have created the TSM database all in one directory under one filesystem. Recently then needed to add more space, and they carved out a lun from another RAID group, and then added that lun to the existing filesystem. TSM shows that it now has the additional space, but it is still all under one directory. In reading the Performance Guide and Admin Guide, they both recommend spreading the data out over multiple directories, putting each directory behind separate disks/luns. This certainly makes sense to spread the I/O out over multiple luns, and I get that. But is there anything wrong with the way my customer has done it? They are using multiple luns from different RAID groups, but they are all put together behind one directory. Is this going to become a problem as they add more and more load to this instance? If TSM has lots of separate directories and they are across multiple luns, does TSM do it's database I/O differently?
Best Regards, John D. Schneider The Computer Coaching Community, LLC Cell: (314) 750-8721
