Lenovo Storage S3200 with Fibre Channel
6
SSD Read Cache and Tiering
Tiering occurs on the Lenovo Storage S3200 by separating drives into three types:
Archive – 7200 RPM drives
Standard – 10K or more RPM drives
Performances – SSDs (requires optional license)
Automatic tiering occurs among the different pools of drive types based on the frequency
of data access. Data blocks associated with frequently accessed files will migrate to the
highest performance tier available, while rarely accessed data blocks will be migrated to
a higher capacity tier. This process allows for users or applications to change their
access patterns and have the storage optimize itself every 5 seconds without any
administrator prevention.
The SSD read cache is another option for improving performance by expanding the
effective size of the controller cache without any additional licensing costs. Both
performance tiering and the SSD read cache were tested as part of this validation. The
tiering occurred at a granular level in 4MB chunks that allowed frequently accessed data
to be determined in a programmatic way without any user intervention. It is easy to
monitor where data is stored on the S3200 via either the command line or the GUI.
To Next Page
Loading...
