Lee Stewart wrote: <SNIP> > For example, doing an LVM with 45 mod 9s. Round numbers math gives me > 6.8GB/volume x 45 volumes = 306GB. That's close to what Max gives. > But what's the number with 8 stripes? >
Hello Lee, The idea is to put each of the specified stripes on a different DASD. I have always used a number of stripes that was a factor of the number of DASD in the VG. So for your example of 45 DASD that would mean using a number of stripes of either 9 or 5. Also I have always added extra DASD to the VG pool in multiples of the number of stripes, in the above example that would mean adding either 9 or 5 DASD at a time. If you do not do as I suggest, then you can end up with more stripes on one or more DASD than on others. This would defeat the purpose of using stripes, which is to spread the I/O load "evenly" across multiple DASD. If you want to use a number of stripes of 8, then either put 48 DASD in your VG pool or reduce to 40. 48 has more factors, so with 48 DASD in the VG you could choose a number of stripes from 2,3,4,6,8,12,16,24. mark ---------------------------------------------------------------------- For LINUX-390 subscribe / signoff / archive access instructions, send email to [EMAIL PROTECTED] with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390
