StorageReview.com -
Many IT managers have been hearing about the benefits (low power, high
IO bandwidth, low latency) of adding SSDs to their existing system to
improve IO speed and application performance. They have also heard
about some of the issues associated with adding SSDs such as high cost,
device wear and data organization disruption. Still, SSDs are here to
stay and the list of vendors and products is getting bigger every day.
The easiest way to take advantage of the SSD benefits is to deploy SSDs
as cache. However, even doing something that sounds that simple can
waste this valuable resource. Enter the concept of SSD caching
software. SSD caching software is used to seamlessly manage the data
flow to the SSD to maximize the ROI of this expensive technology.
Why cache application data in the first place?Simply put, caches are used to speed up access to data. A cache is a
component placed in front of a primary device to transparently store
data so that future data requests can be served faster. As data passes
through a cache on its way to or from the primary device, some of the
data is selectively stored in the cache. When an application or process
later accesses data stored in the cache (a cache hit), that request can
be served faster from the cache than from the slower device. The more
requests that can be served from cache, the faster is the overall system
performance. ... 続きを読む
http://www.storagereview.com/using_ssd_caching_software_to_boost_storage_io_speed_and_application_performance
2012/03/26
Using SSD Caching Software to Boost Storage I/O Speed and Application Performance
