We are sometimes doing an
'mminfo -q <tell me what I want> -r ssid | nsrclone -f <pool> -S -f -'


By the way, I always believed, cloning *would always* demultiplex; we usualy
do automatic cloning after savegroup finish, and sometimes during cloning
you can see the source tape wind forward (presumably searching the next
records of *the* saveset being cloned at that moment) and backward
(presumably after having finished cloning one saveset and picking up the
next saveset on the worklist). Once I have some time left, I will have a
closer look at the file and record positions.

Ingo


On Fri, 19 Jan 2007 09:58:46 -0500, George Sinclair
<George.Sinclair AT NOAA DOT GOV> wrote:

>rader AT GINSENG.HEP.WISC DOT EDU wrote:
>
>> > > I find it hard to believe that cloning preserves multiplexing, it's my
>> > > understanding that nsrclone goes one by one, SSID to the next SSID
>> > > cloning each singly before moving on to the next
>>
>> > It doesn't need to do that (at least not in the situations I've used
>> > it), and it's very easy to test.
>> >
>> > Instead of copying one ssid at a time, it can maintain a list of ssids.
>> > As it streams a source volume, data from any matching ssid is copied to
>> > a destination volume.  This has the big benefit of requiring only a
>> > single pass on a source volume.
>>
>>And so for many years we've been semi-manually doing something like...
>>
>>  BEGIN='05Jan07 2359'; END='06Jan07 2359'
>>  QUERY="'!incomplete,level=full,'savetime>$BEGIN,savetime<$END"
>>  mminfo -r ssid -q "$QUERY" > ssidlist
>>  nsrclose -S `cat ssidlist`
>>
>>Is there a better way these days?
>>
>>
>>
>How about just nsrclose -b pool -S -f ssidlist
>
>>steve
>>- - -
>>systems & network manager
>>high energy physics
>>university of wisconsin
>>
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>
>
>--
>George Sinclair - NOAA/NESDIS/National Oceanographic Data Center
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