McKown, John wrote:
Suppose, for the sake of argument, that I want to keep all the z/OS
documentation that I currently have on a Windows share on z/OS itself. I
plan to put it all in z/OS UNIX files and serve it up via the HTTPD
server. This avoids any dependance on the Windows server for our
documentation.
We do exactly the same thing. Everyone is quite happy with it. We use
the z/OS DFS/SMB server to make it all accessible to Windows users. We
also use Library Server for z/OS so that our Windows, Linux, Mac OSX,
and remote PDA users can access the information via browser interface.
The problem is that we only have 3390-3 sized volumes and don't want any
other size. This means a single volume contains only about 2.8 Gb. The
entire subdirectory that I would like to duplicate contain almost 6 Gb
of data. This basically means two complete 3390-3 volumes to contain it.
I would work to eventually change that. Mod3s have their place (i.e.,
for paging), but not for this kind of storage. For "real" data we use a
mixture of mod9s and so-called "large" volumes (61+ kcyls). We maintain
several, very large multivolume zFS data sets.
Should something this large be zFS? Or is HFS OK? Is there any
documentation on the pros/cons of zFS vs. HFS? I have zFS implemented on
my sandbox z/OS 1.6 system. But not on my production z/OS 1.4 system.
Both zFS and HFS can span volumes. We use zFS for our DFS/SMB shares
because it provides better performance. The "kicker" is that you can't
quiesce/backup your zFS from another system in the sysplex on z/OS 1.6
or lower. I remember reading that this unfortunate restriction has been
(or will be) lifted. Whether the fix is in z/OS 1.7 or the follow-on
release, I'm not sure. In any case, HFS does not have this restriction.
--
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| Edward E. Jaffe | |
| Mgr, Research & Development | [EMAIL PROTECTED] |
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