Re: AS400/i5 etc general behaviour

[Tom Liotta <qsrvbas@xxxxxxxxxxxx>]

Charles Wilt wrote:

> The difference between the single level store the i uses and the swap
> file system used by other systems, is that when the i swaps data out
> of memory, it only exists in one place on disk.  Whereas with other
> systems, data is swapped out of memory into a specific swap file on
> disk plus the original copy of the data still resides on the file
> system. In other words, with the i, a particular piece of data exists
> at a given time either on disk, or in memory.

Shouldn't that be "...with the i, a particular piece of data exists 
at a given time either on disk, or on disk _and_ in memory."? I 
don't think it's wiped from disk when it's paged into memory. I 
think it's more that whenever it's paged into memory, that becomes 
the page-image that everything (most things?) recognize as the "real 
thing". And unless it actually changes, it shouldn't ever be paged 
back out.

Tom Liotta