Fujitsu ETERNUS DX60 S3 - Page 688

Appendix A Parameter List
A.1 System Management
ETERNUS Web GUI User’s Guide (Settings)
Copyright 2015 FUJITSU LIMITED P2X0-1270-13ENZ0
688
• Caching Priority
• Monitoring I/O
A.1.3.9 Setup Exclusive Read Cache
For details about this function, refer to "1.4.10 Setup Exclusive Read Cache" (page 59).
For the factory default settings for this function, refer to "Appendix B Setup Exclusive Read Cache" (page 975)
.
● Cache Size Settings
• Exclusive Read Cache
A.1.3.10 Setup Disk Drive Patrol
For details about this function, refer to "1.4.11 Setup Disk Drive Patrol" (page 61).
Description This parameter specifies the concurrency for storing data in EXC or EXCP.
The greater the value is, the higher the concurrency is set for storing data in EXC or EXCP.
The smaller the value is, the lower the concurrency is set for storing data in EXC or EXCP.
This item is displayed only when using the controller firmware version V10L4x or later.
Input condition/
Display contents
10 (Fastest) - 1
This parameter is used for performance tuning. It is not necessary to change the default setting ("10 (Fastest)") for
normal use.
Description Select the target I/O type that is to be monitored for data storing to the cache.
This parameter affects how frequently data is stored in the EXC or EXCP.
Input condition/
Display contents
• Read
• Read / Write
Description Select the exclusive read cache ratio for the CM cache memory.
The actual capacity of the exclusive read cache varies depending on the memory size
installed in the ETERNUS DX.
Exclusive read cache capacity = Cache area for user data (*1) x Exclusive read cache (%)
*1: Cache area for user data = (Memory size per CM - Active table area (such as copy
table size)) / 2 (*2)
*2: To mirror the user data, divide the calculated value in half.
Input condition/
Display contents
• 0 %
• 5 %
• 10 %
• 15 %
• 20 %
• 25 %
• 30 %