On Mon, 3 Dec 2007 08:43:45 -0500, Romanowski, John (OFT) <[EMAIL PROTECTED]> wrote:
>Now that the swap topic's open again: > >What is the basis for advising z/VM VDISK users to have a hierarchy of >multiple linux swap areas of increasing sizes? Are there feature(s) of >the swapping algorithm that make that hierarchy principle optimal? The configuration we use includes swap space on real DASD at a lower priority than the VDISK swap areas. Over time Linux will swap more to th e real DASD than the VDISKs. At this point doing a swap off and then on of a VDISK swap area frees up the fast VDISK. Having various VDISK sizes allows the flexibility of migrating smaller amounts of swap data during busy periods and larger amounts during slow periods. Brian Nielsen
