6. DATA SOURCES › 6.3 Correlating Data Sources › 6.3.9 Important Usage Notes for the NLL and LSY Files

6.3.9 Important Usage Notes for the NLL and LSY Files

The NLDM System Activity (NVSLSY) File and the NLDM Link
Activity (NVSNLL) File combine data from two separate
collection functions within the same monitor:  either two
collection functions within NetView or two collection
functions within CA NetMaster. You must ensure that these two
data collection functions are synchronized, or the data from
the two functions in each file will represent information
from different time periods.

To synchronize NetView Response Time Monitor (RTM) data and
NetView accounting and availability (A&A) data collection,
execute the NetView COLLECT and NetView RECORD commands
simultaneously at regular intervals throughout the day using
NetView/NCCF CLISTS.  The NetView COLLECT command produces
the SMF type 39 interval record that contains RTM data and
the NetView RECORD command produces the SMF type 39 interval
record that contains A&A data.

On NetView hosts that control large network domains, you may
not be able to synchronize the collection of RTM and A&A data
on a domain-wide basis.  For example, if a NetView domain
contains 2,000 or more remote 3274/3174 cluster controllers
with the RTM feature, several minutes can elapse from the
time the NetView COLLECT command executes until the time
NetView receives RTM data from all of the remote controllers.
A similar delay does not occur when A&A data is received
because it is extracted internally from VTAM.  A possible
solution is to synchronize the collection of A&A and RTM data
for a subset of network resources within a NetView domain.
For example, if you want to use the data as it is organized
in the NLDM Link Activity (NVSNLL) File, synchronize
execution of the NetView COLLECT and RECORD commands for all
the resources attached to a given NCP or link.  If the
arrangement of data in the NLDM System Activity (NVSLSY) File
is more useful to your data center, synchronize collection
of the A&A and RTM data by primary logical unit (PLU).

If both the RTM and A&A data collection functions are turned
on in NetView, then RTM and A&A data is automatically
forwarded to NetView and combined in a session termination
record, even if the data is not actively solicited through
COLLECT and RECORD commands.  However, it is important to
consider producing records for both RTM and A&A data at
regular intervals using NetView CLISTs containing COLLECT and
RECORD commands due to the following:

   o  Analysis of peak activity and long response times is
      permitted during extended sessions

   o  Data loss is prevented if either the host system or any
      resource along the session path fails before the
      session terminates normally

For information on how to synchronize CA NetMaster Network
Tracking System (NTS) and Network Error Warning System (NEWS)
RTM data collection and CA NetMaster NTS accounting data
collection, refer to the CA NetMaster Management for SNA
documentation.