Avago Technologies MegaRAID Fast Path Software - Manual (Page 111)

LSI Corporation Confidential | July 2011 Page 111
MegaRAID SAS Software User Guide Chapter 4: WebBIOS Configuration Utility | CacheCade Configuration
4.6 CacheCade Configuration This section contains the procedures for creating CacheCadeRAID virtual drives for the
CacheCade advanced software feature.
The MegaRAID CacheCade advanced software improves application performance by
expanding the MegaRAID read caching capacity and introducing write caching. The
CacheCade feature uses high-performing CacheCade software as a secondary tier of
cache to provide faster reads and to maximize transactional I/O performance.
NOTE: This procedure does not create a RAID configuration. It creates a CacheCade
software virtual drive that functions as a secondary tier of cache.
Using the CacheCade 2.0 SSD Read Caching software as controller cache allows for very
large data sets to be present in cache, delivering performance up to 50 times greater
than regular cache in read-intensive applications, such as online transaction processing
(OLTP), and file and Web server workloads. The solution accelerates the IO performance
of HDD-based drive groups while requiring only a small investment in CacheCade
software technology.
To support full-throughput for multiple direct-attached CacheCade software, this
feature reduces I/O-processing overhead in the 2208-chip-based MegaRAID
controllers. CacheCade offers performance equivalent to flash-based controllers and
better performance for RAID 5 and RAID 6 when compared to Fusion I/O.
4.6.1 Creating a CacheCade 2.0 SSD
Read Caching Configuration
CacheCade 2.0 SSD Read Caching software provides you with read caching capability.
Perform the following steps to create a CacheCade 2.0 drive group:
1. Click Configuration Wizard on the WebBIOS main dialog.
The Select Configuration Wizard dialog appears, as shown in Figure 60 .