Fujitsu ETERNUS DX100 S3 - Page 852

Appendix A Parameter List
A.4 Connectivity Management
ETERNUS Web GUI User’s Guide (Settings)
Copyright 2015 FUJITSU LIMITED P2X0-1270-13ENZ0
852
- TCP Window Scale
Description 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:
Input condition/
Display contents
0 - 14
This item is not displayed when the port type is "iSCSI RA (for older storage system connection)".
TCP Window Scale TCP Window size
0 32 KB
1 64 KB
2 128 KB
3 256 KB
4 512 KB
5 1024 KB
6 2048 KB
7 4096 KB
8 8192 KB
9 16384 KB
10 32768 KB
11 65536 KB
12 131072 KB
13 262144 KB
14 524288 KB