Cisco Cisco E-Mail Manager Unity Integration Option Guida All'Installazione
Performance Considerations
During internal testing, hyper-threading has consistently doubled the time it took the database
migration to complete; therefore, to minimize migration time one should disable hyper-threading.
migration to complete; therefore, to minimize migration time one should disable hyper-threading.
Ways to Reduce Data Migration Time
How to reduce data migration time:
•
Reduce database size.
–
Purge the Logger DB of all data already replicated to the HDS (25 GB or less)
–
Remove any unneeded records, especially RCD, RCV, TCD, and TCV tables via ICM
Purge Utility and/or SQL Query Analyzer.
Purge Utility and/or SQL Query Analyzer.
Note: Removing records impacts the availability of historical reports. Knowledge of the
HDS schema is required.
HDS schema is required.
•
Use better hardware, especially on I/O subsystems.
–
RAID 1 + 0
–
I/O Cache – more is better
•
For Technology Refresh upgrades, have the fastest network possible (gigabit through one
network switch) between the source and the destination machines. Use of a crossover cable
is not recommended because it lacks buffer memory and can cause data loss.
network switch) between the source and the destination machines. Use of a crossover cable
is not recommended because it lacks buffer memory and can cause data loss.
Upgrade Guide Cisco ICM/IPCC Enterprise & Hosted Editions Release 7.0(0)
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Chapter 5: ICM/IPCC 7.0(0) Upgrade Time and Space Requirements
Time Guidelines and Migration Performance Values