Modify Copy Table Size - Fujitsu ETERNUS DX60 S3 User Manual

Chapter 7 Advanced Copy Management

7.6 Modify Copy Table Size

7.6

Modify Copy Table Size

This function sets the copy table size, which is used by the firmware for the ETERNUS DX, on the CM cache
memory. When the EC, OPC or REC function is in use, this copy table is used as the area that manages the
progress of the copy.
• Registering a license for the Advanced Copy function or the Unified Storage environment is required to
use this function.
• When the copy table size is equal to 0MB, copy functions cannot be used. The initial (factory default)
copy table size setting for the ETERNUS DX500 S3/DX600 S3 and the ETERNUS DX8700 S3/DX8900 S3 is
0MB. Modify the copy table size before using the copy function.
• Make sure to stop the copy session before reducing the copy table size. To check the copy session, refer to
"Advanced Copy (Basic Information)" in "ETERNUS Web GUI User's Guide (Operation)".
• Cache memory is not only used for the copy table, but also used for REC Buffers. Note that a copy table
with the maximum capacity for each model cannot always be created. Whether a copy table with the
maximum capacity can be created depends on the memory capacity in the ETERNUS DX and the REC
Buffer size.
• If the copy table size is insufficient, an error occurs in the copy session. Make sure to specify the "Table
Size Threshold" value to monitor the usage of the copy table in advance. The ETERNUS DX reports the
notification using the method specified in
select the notification method in advance.
• Set the resolution as small as possible. When a large value is specified, the performance may be reduced.
When unsure about whether the copy target area might be increased in future use, specify the maximum
resolution.
• The same resolution must be used by both the copy source and copy destination storage system for REC. If
the resolution settings for the copy source and copy destination storage systems are different, REC cannot
be performed. Note that the copy table sizes do not need to be the same. If different recommended
resolutions are calculated for the copy source and copy destination storage systems, use whichever
resolution is greater for both storage systems. If the resolution is changed, recalculate the copy table size
setting for the storage system with the new resolution.
• Changes to the resolution setting are applied from the next session. For a copy session that is currently
being performed, data is copied with the resolution that was specified when the session was started. To
change the resolution of a copy session that is currently being performed, cancel the copy session and
start again.
• When the table size or the table size threshold is changed, the new value is applied immediately.
• The current copy table size can be checked. Refer to "Setting (Advanced Copy)" in "ETERNUS Web GUI
User's Guide (Operation)" for details.
• Setting the copy table size is not required when using the ODX or XCOPY function, or when using copy
functions with VVOLs.
For details on the parameters for this function, refer to
For the factory default settings for this function, refer to
"1.9.1 Setup Event Notification" (page
602
ETERNUS Web GUI User's Guide (Settings)
Copyright 2015 FUJITSU LIMITED
"A.7.3 Modify Copy Table Size" (page
"Appendix B Modify Copy Table Size" (page
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