HP StorageWorks Scalable File Share - Manual (Page 159)

Verifying the system 6–29
*** program interrupted by user ***
Total queued = 0.
Total sent = 0.
Total received = 93751.
Bidirectional (summed) bandwidth
The bidirectional test causes packets to stream in both directions (both nodes are always sending). The
gm_allsize
command reports the sum of the send and receive bandwidths. To test the bidirectional
(summed) bandwidth between two nodes, specify the
--both-ways
option on the master server, as
follows:
On the slave server, use the same command as that used for the unidirectional test. For example:
# /opt/gm/bin/gm_allsize --slave --size=15
On the master server, specify the
--both-ways
option when you invoke the command. For example:
# /opt/gm/bin/gm_allsize --both-ways --bandwidth
--remote-host=south1.my.domain.com --size=15 –geometric
You can also specify the
--verify
option to force the verification of contents of all messages; however,
this option significantly degrades the performance of the test. The following example shows typical output
produced by this test. To stop the process on the slave server, press
Ctrl/c
:
# Opening board 0 port 2. Sending to port 2.
# Not verifying contents of messages.
Remote GM node id n2r1 (6).
# Reliable Point-to-Point Bidirectional Summed Bandwidth (MByte/s)
# size 15
# ./gm_allsize --both-ways --bandwidth --remote-host=south2/
--size=15 --geometric
1 0.20
2 0.41
3 0.60
4 0.81
5 1.01
6 1.16
7 1.41
8 1.61
9 1.79
10 2.02
11 2.22
12 2.39
13 2.62
14 2.82
15 2.98
16 3.23
18 3.58
20 4.03
22 4.44
24 4.77
27 5.44
30 5.83
33 6.66
37 7.36
41 8.05
46 9.14
51 10.01
57 11.34
64 12.58
The output from the command consists of two columns of data: the first column lists the message size (in
bytes) and the second column lists the bandwidth (in MB/sec).