The point not missed...or was missed is:
Reduce the amount of cache available for z/Linux machines and let MDC
handle it.
Of course, you can't turn off Linux caching, and even if you reduce the
virtual size of the machine below the working set size (where you are
actively paging to the swap file)
Tom Duerbusch wrote:
> If you are running low on memory and can't afford the next bumb in
> memory (yet), you tune back the z/Linux caching, and let MDC handle more
> of the load. MDC is a shared cache, that is shared across all dasd
> where it isn't explicitly turned off. If one Linux image beco
Well, it all depends on what you want to do, the requirements you have
and how much money you have .
For a particular application, cache is always better closer to the
application then farther away. i.e. you create an array within your
program and load the data there, and you can access it much f
MDC is a write-through cache so it does not apply to write I/Os
It can help read I/Os, but the answer to how/if to use it is
"it depends". As Carsten mentioned, it can be great for shared
minidisks with significant read I/O. There are also cases where
for non-shared minidisks, I might want to use
Johnny Tan wrote:
> By default, z/VM minidisk cache is enable. As I know, z/VM minidisk cache is
> using z/VM real memory and expanded storage. Would anyone recommend to use
> minidisk cache on z/VM where the main purpose of z/VM here is to support
> Linux guests?
>
> Today's DASD technology ha
Hi,
I have a question here on z/VM minidisk cache.
By default, z/VM minidisk cache is enable. As I know, z/VM minidisk cache is
using z/VM real memory and expanded storage. Would anyone recommend to use
minidisk cache on z/VM where the main purpose of z/VM here is to support Linux
guests?
To
Hi,
I have a question here on z/VM minidisk cache.
By default, z/VM minidisk cache is enable. As I know, z/VM minidisk cache is
using z/VM real memory and expanded storage. Would anyone recommend to use
minidisk cache on z/VM where the main purpose of z/VM here is to support Linux
guests?
To
