On Sun, 23 May 2010 20:01:50 -0400, Shmuel Metz (Seymour J.) wrote:
>
>>The clean way forward was devised by [I]SPF some time ago in the
>>SPFEDIT ENQ.
>
>No.
>
>>I believe it assures data integrity;
>
>It doesn't.
>
>>NFS server and FTP server (others?)
>>use the technique to cooperate with ISPF.
>
>K3wl. What if it isn't ISPF that's updating the member? What ISPF does
>only provides protection from programs doing the same thing. If you
>want protection across the board then you need exclusive access.
>
ISPF also does ENQ SYSDSN SHR, and for load modules, SYSIEWLP, so it
provides protection from programs not doing the same thing.

Yes, it would have been better if the convention had been established
by DFSMS instead of by a single product such as ISPF.

-- gil

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