HOW DO I CALCULATE THE NUMBER OF DB2 USER LICENSES NEEDED FOR CMVC?
ITEM: RTA000052038
QUESTION:
I have reviewed item CQJPF and still have a question about the
number of DB2 licenses I need. The item says that the CMVC user
communicates via a CMVC daemon. Is there just one daemon for
CMVC, or a configurable number, or is there one per user? If I
have 5 CMVC tokens, and want all five to have relatively simultaneous
access (realizing the 15 hold, etc.) how many DB2 user licenses
must I purchase? An example of how to calculate this, and the
trade-offs (similar to your ROT of 1.4 CMVC tokens per user) would
be helpful also.
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A: The cmvcd daemons run on the CMVC server and handle CMVC client
requests for CMVC actions. Each daemon handles one request at a time.
You determine the number of daemons you want to start based upon the load
you expect the CMVC server to handle accessing DB2/6000. Each cmvcd
daemon requires a database license. CMVC will support a maximum of 255
cmvcd licenses. When you specify a given number of daemons to be
started, CMVC actually activates twice that number. However, only the
number of daemons you specify actively process requests to the DB2/6000
database and only the number you specify are database users.
Thus, if you are able to get by satisfactorily with one cmvcd daemon,
CMVC will create two daemons, of which only one is used to access the
DB2/6000 database. You would need one DB2/6000 license. You could
have as many clients connected to the database as you wish with this one
license. However, they would only be actually accessing the database
one at a time. This would be satisfactory depending upon the particular
applications running in the client/server environment. If performance
is not satisfactory, then you would need to increase the number of
DB2/6000 licenses as appropriate and increase the number of cmvcd daemons
to correspond to the DB2/6000 licenses added.
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This item was created from library item Q675651 FFCQB
Additional search words:
AIX AIXCMVC ALTERNATE CALC CALCS CALCULATE CASE CMVC COMPUTE
CONFIGURATIO DB2 FFCQB INDEX IX JAN95 LICENSES NUMBER NUMBERING
NUMERIC NUMERICAL OZNEW RISCSYSTEM SOFTWARE USER
WWQA: ITEM: RTA000052038 ITEM: RTA000052038
Dated: 01/1995 Category: AIXCMVC
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