Fujitsu ETERNUS DX60 S3 User Manual page 852

Appendix A Parameter List
A.4 Connectivity Management
- TCP Window Scale
Description
Input condition/
Display contents
This item is not displayed when the port type is "iSCSI RA (for older storage system connection)".
Input the TCP Window Scale of the target port.
"TCP Window Scale" is a parameter that is used to specify the TCP window size. When
the I/O load is high, the expected performance may not be achieved even if "0" or "1"
is specified for TCP Window Scale. Even if "8" or higher is specified, the ETERNUS DX
performs as though "7" is specified for TCP Window Scale.
Specify the "TCP Window Scale" in powers of two (when the value is n-th to the power
of two, "n" indicates the "TCP Window Scale"). The relationship between the setting
value and the TCP Window Scale is as follows:
TCP Window Scale
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
0 - 14
852
ETERNUS Web GUI User's Guide (Settings)
Copyright 2015 FUJITSU LIMITED
TCP Window size
32 KB
64 KB
128 KB
256 KB
512 KB
1024 KB
2048 KB
4096 KB
8192 KB
16384 KB
32768 KB
65536 KB
131072 KB
262144 KB
524288 KB
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