Expand Configuration and Management Manual (H06.21+, J06.10+)

Tuning
Expand Configuration and Management Manual — 529522-013
19 - 24
Using Measure
NETLINE Entity
The NETLINE entity reports several values that you need when modeling traffic on a
path. NETLINE reports part of the path performance associated with a particular
Expand line-handler process, logical device, and ServerNet wide area network (SWAN)
concentrator.
The number of data bytes received is shown in Din4-Bytes and the number of bytes
sent is shown in Dout4-Bytes.
NETLINE also shows the distribution of message sizes in message-size ranges. This
information corresponds to the histogram shown by the SCF interface to the Expand
subsystem. However, unlike SCF, Measure shows only the histogram for the measured
interval.
Example 19-2 shows traffic intensity during a 34.7 second period beginning at
11:53:37. During this period, 1.27 messages of 605.14 bytes were sent per second.
(Relevant information is highlighted in boldface type.)
NETLINE Din4-Bytes and Dout4-Bytes counters include file-system and message-
system overhead and are measured before data compression. L2in-Bytes and L2out-
Bytes counters represent traffic between the input-output process (IOP) and the driver.
The application Link Complete (LCMP) is included in the U64-Bytes category of the
NETLINE display. Application LCMPs are also shown in the Links Received counter for
the SYSTEM entity. The other NETLINE categories report message frames only.
LINE Entity
The LINE entity accounts for the traffic sent by the Expand line-handler process or the
NAM process to and from the OSI Physical Layer (Layer 1). In the sample display
shown in Example
19-3 on page 19-25, the NAM process $X25TAH sent about 1,344
data bytes with 204 bytes of overhead. The Output-Data-Bytes counter and the
Input-Data-Bytes counter show the bytes sent and received by the NAM process or
Expand line-handler process. The Output-Bytes counter shows the data plus the Layer
2 overhead. (Relevant information is highlighted in boldface type.)
Example 19-2. NETLINE Entity Display
Network Line $B30S Device Type 63 Subdevice Type 5
Logical Device 178 TRACKID SWAN38 Clip 3 Line 0
Local System \TAHITI From 7 Feb 1997, 11:53
:37 For 34.7 Seconds
Requests 1.27
Write-Busy-Time 2.21 % Writes 11.97
Read-Busy-Time 98.07 % Reads 9.34
L2in-Bytes 1,204 L2out-Bytes 1,589
Din4-Bytes 773.09 Dout4-Byte
s 605.14
Cin4-Bytes 411.55 Cout4-Bytes 359.61
U64-Bytes 4.82 U128-Bytes 2.05
U256-Bytes 0.61 U512-Bytes
U1024-Bytes 0.03 U2048-Bytes 0.23
U4096-Bytes 0.12 O4095-Bytes