With our RH guests we use a 64MB vdisk as our highest priority swap
device, backed up by a 128MB swap minidisk "just in case".  The LPAR is
currently configured without expanded storage, BUT this weekend we're
bringing some in with an IPL.

I presume SuSE SLES 8 includes the xpram driver?  I wonder if I should
consider XSTOR for my "backup" swap volume rather than minidisk.  Since
it's coming from XSTOR, does it need to be initialized like VDISK does,
with something like the MKSWAP EXEC?

Presumably if guests don't have XSTOR defined, z/VM will still use it
for something.  The LPAR is being reconfigured with XSTOR based on
various recommendations... at the expense of some real storage (no
additional storage is being configured to the LPAR).  z/VM is supposed
to be a better performer under this configuration?

Thanks for any info,
~ Daniel

> With the xpram driver Linux can use expanded storage as
> another disk I/O
> device, typically for paging or anything that requires very fast
> access.  You might be better off removing it and using VDISK for a
> paging device.


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