And a third single disk for /archive. What my sys admin and I want to do is reconfigure the disk pool (Sun T3) to 4 RAID0+1 disks and purchase another T3. In this way we go from a 3 disk system to a 9 disk system (two 4 RAID 0+1 disks and /archive disk). I am also aware that it is critcal to get the redo logs off of RAID5.
Can you please share your thoughts on my current situation (disk crowding) and my new direction so that I may learn better.
The 0+1 filesystems will definitely do better than the RAID 5 filesystems, especially if they are spread out on two controllers. As you know, redo on RAID 5 is bad news. Also, I would put your ORACLE Software and TEMP on the single disk and not archive. IMHO, archive is much too important to be NOT protected.
T3's use Hardware RAID, right? Even so, SW RAID and 0+1 will be better than SW RAID 5 anyday.
As for raid5, I have a question:
If i have 8 disks, one configuration is for raid5, another option is for raid10.
For the performance of read operation(read mostly), which configuration will give better performance? According to your experience?