The schedules usually set to 10 MPX

On Tue, Apr 29, 2008 at 1:45 PM, Tharp, Trey <Trey.Tharp AT allstate DOT com> 
wrote:
> What's the multiplexing # set to on the schedule? Also, "Allow multiple
>  data streams" is checked on the policies, right?
>
>  You can have an unlimited number of policies using a storage unit group
>  as far as I know. We've got well over 100 policies using a storage unit
>  group with 2-4 storage units in it and we run over 1000 active jobs to
>  this storage units.
>
>  There are many enablers and limits for multiplexing and multistreaming
>  that all have to be turned on and turned up for it to work. The lowest
>  denominator is on the schedule itself, so if a new stream starts, it
>  will not join a mpx group that's got more jobs active than what it's set
>  to.
>
>  i.e. a schedule with an mpx setting of 4 will not join a storage unit
>  with Max Drives = 1 and Max MPX = 10 that's got 5 streams running, even
>  though the storage unit can take 5 more streams.
>
>  -Trey
>
>
>
>  -----Original Message-----
>  From: veritas-bu-bounces AT mailman.eng.auburn DOT edu
>  [mailto:veritas-bu-bounces AT mailman.eng.auburn DOT edu] On Behalf Of fred
>  fred
>  Sent: Saturday, April 26, 2008 4:22 AM
>  To: veritas-bu AT mailman.eng.auburn DOT edu
>  Subject: [Veritas-bu] Storage unit groups are not understood - yes
>  I'mpuzzeld
>
>  In the relms of the Top 20 (or so) misunderstood ....specifically #2.
>  Storage unit groups are not understood.  (version = 6.5.1)
>
>  I'm still puzzled..... If you have policies pointing to the same storage
>  group with two policies running with the a couple of streams each.  Then
>  a third starts it ends up by queueing.  The only difference being its
>  not NT Windows but a Standard Unix policy.
>  Rentetion time and media pool the same.
>
>  Can only a limited number of Policies actually use the storage group at
>  any one time, even if the retention time and tape pool the same?
>
>  Does the same apply  for storage units?
>
>  If you have  a stroage unit like below I would expect you could have two
>  policies writng to it at the same time (with no queueing ) as long as
>  there less than a total of 10 streams. Policies with media multiplexing
>  of 10 and same retention and pool.
>
>  Storage Unit:
>  Multiplexing enabled
>  Maximum concurrent write drives: 1
>  Maximum streams per drive: 10
>  I have set it to one as I don't what to multistream to more that two
>  tapes drives in the storage unit group.
>
>  Storage Unit Group (set to "balance load" ) has two storage units of the
>  above i.e a max of 20 streams i.e it will do twice the work load
>  of my example  I'm assuming each stream is a "job".   In the manuals
>  what is a "job" seems to change with context.
>
>  Max client streams = 24 (for slow backups of small servers)
>
>  Am  I missing anything?
>
>  Cheers Fred
>  _______________________________________________
>  Veritas-bu maillist  -  Veritas-bu AT mailman.eng.auburn DOT edu
>  http://mailman.eng.auburn.edu/mailman/listinfo/veritas-bu
>
>  _______________________________________________
>  Veritas-bu maillist  -  Veritas-bu AT mailman.eng.auburn DOT edu
>  http://mailman.eng.auburn.edu/mailman/listinfo/veritas-bu
>
_______________________________________________
Veritas-bu maillist  -  Veritas-bu AT mailman.eng.auburn DOT edu
http://mailman.eng.auburn.edu/mailman/listinfo/veritas-bu