dump volume

[Feljav]

What is a dump volume?

[Victor Fridyev · Accepted solution]

Hi,


Dump space is one or a series of disk devices used to store a system crashdump. By default, HP-UX will configure a single dump device. The initial dump device is also configured as the primary swap device. Primary swap is a contiguous volume, and as such it is not easy to extend its size. Consequently, in order to configure additional dump space, we will need to configure additional dump devices that can be either individual disks or volumes (LVM or VxVM). If we are using volumes, the volumes do not need to be created in the root volume/disk group. Together with our initial dump device, they form our total dump space. If we are going to create a volume to act as a dump device, there is a criterion to which dump devices must adhere:

http://safari.oreilly.com/0131463969/ch09lev1sec7

HTH

[A. Clay Stephenson]

... and if you have the room (and generally you do because boot disks are much larger these days), it's much smater to configure separate dump and swap spaces. The two really have nothing to do with each other and the default approach os combining these two functions into the same space is a relic of the days when drives were small. By separating the swap and dump areas, there is no need to compress and save the image in a cooked file before swap is used. This can save many valuable minutes during a reboot cycle.