Avago Technologies MegaRAID Fast Path Software - Manual (Page 221)

LSI Corporation Confidential | July 2011 Page 221
MegaRAID SAS Software User Guide Chapter 5: MegaRAID Command Tool | CacheCade Related Options
 AdpFacDefSet
 AdpFwFlash
 AdpGetConnectorMode
 AdpSetConnectorMode
 DirectPdMapping
 ShowEnclList
 ShowVpd
 EnclLocate
 PdFwDownload
 SetFacDefault
 PDCpyBk
 AdpFwDump
 Snapshot Enbl/Setprop/Dsbl/TakeSnapshot/DeleteSnapshot
CreateView/DeleteView/Info/Clean/GetViewInfo
 AdpSetProp DefaultSnapshotSpace
DefaultViewSpace/AutoSnapshotSpace
5.5 CacheCade Related
Options
Use the commands in this section to perform actions related to CacheCade 2.0 SSD
Read Caching software and CacheCade Pro 2.0 SSD Read/Write Caching software.
CacheCade 2.0 SSD Read Caching improves application performance by expanding the
MegaRAID read-caching capacity and introducing write caching. The CacheCade 2.0
SSD Read Caching feature uses high-performing CacheCade 2.0 SSD Read Caching
software as a secondary tier of cache to provide faster reads and to maximize
transactional I/O performance.
Using 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 is designed to accelerate the I/O
performance of HDD-based drive groups while only requiring a small investment in
CacheCade 2.0 SSD Read Caching software technology.
To support full-throughput for multiple direct-attached CacheCade 2.0 SSD Read
Caching software, this feature reduces I/O-processing overhead in the SAS 6Gb/s
MegaRAID controllers. CacheCade 2.0 SSD Read Caching offers performance equivalent
to flash-based controllers and better performance for RAID 5 and RAID 6 when
compared to Fusion I/O.