CLI Guide

● standard: This controller cache mode of operation is optimized for sequential and random I/O
and is the optimization of choice for most workloads. In this mode, the cache is kept coherent
with the partner controller. This mode gives you high performance and high redundancy.
● no-mirror: In this mode of operation, the controller cache performs the same as the standard
mode with the exception that the cache metadata is not mirrored to the partner. While this
improves the response time of write I/O, it comes at the cost of redundancy. If this option is
used, the user can expect higher write performance but is exposed to data loss if a controller fails.
Read Ahead Size
If a volume is specified, its read-ahead cache setting:
● Disabled: Read-ahead is disabled.
● Adaptive: Adaptive read-ahead is enabled, which allows the controller to dynamically calculate
the optimum read-ahead size for the current workload.
● Stripe: Read-ahead is set to one stripe. The controllers treat NRAID and RAID-1 disk groups
internally as if they have a stripe size of 512 KB, even though they are not striped.
● 512 KB, 1 MB, 2 MB, 4 MB, 8 MB, 16 MB, or 32 MB: Size selected by a user.
Examples Show the cache parameters for the system and for volume V1.
# show cache-parameters V1
Basetypes
cache-settings
cache-parameter
status
See also
set volume-cache-parameters
show volumes
show certificate
Description
Shows the status of the system’s security certificate.
Minimum role manage
Syntax
show certificate
[a|b|both]
Parameters
[a|b|both]
Optional. Specifies whether to show information for controller A, B, or both. If this parameter is
omitted, information is shown for both controllers.
Output
Properties are described in alphabetical order.
Certificate Status
● Customer-supplied: The controller is using a certificate that you have uploaded.
● System-generated: The controller is using system-generated certificates.
● Unknown status: The controller's certificate cannot be read. This most often occurs when a
controller is restarting or the certificate replacement process is still in process
Certificate Text
The full text of the certificate.
Controller
● A: Controller A.
● B: Controller B.
Time Created
The date and time in the format year-month-day hour:minutes:seconds when the
certificate was created.
170 Alphabetical list of commands