Note: "permalinks" may not be as permanent as we would like,
direct links of old sources may well be a few messages off.
On 29.06.2007 00:10, Lars Ellenberg wrote: > what is your backend storage? 3ware 3650 BBU 6x 320GB WDE Raid 10, 16k stripe > kernel? 2.6.21 > lvm version? 2.02.17 > what does "lvs -o +devices --segments" say? LV VG Attr #Str Type SSize Devices backup vg owi-a- 1 linear 450.00G /dev/sda3(76833) backup-snap vg swi-ao 1 linear 15.00G /dev/sda3(199713) data vg -wi-ao 1 linear 300.00G /dev/sda3(0) meta vg -wi-ao 1 linear 132.00M /dev/sda3(76800) > filesystem? XFS, nobarrier, not aligned. > RAM? 4GB > cpus? 2x Xeon 5130 @ 2.00GHz > in short, in my experience having the snapshot > on the same pv as the origin may cause serious pain. From what I can tell, this is way less problematic with hardware controllers with big write cache. What ever they do, they seem to handle the copy on write for LVM snap quite good. -- Regards, H.D.