scmadm man page on OpenIndiana

scmadm man page on OpenIndiana

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scmadm(1M) System Administration Commands scmadm(1M)

NAME
scmadm - storage cache manager administration utility

SYNOPSIS
scmadm

scmadm -h

scmadm -e

scmadm -d

scmadm -v

scmadm -C [parameter [= [value]]...]

scmadm -o {system | cd | device} [option]

scmadm -m {cd | diskname | all}

DESCRIPTION
The scmadm command provides various options for controlling and gather‐
ing information about a storage device cache.

OPTIONS
If no options are specified, scmadm displays a list of configured cache
descriptors with disknames, options, and global options. The scmadm
command supports the following options:

-h

Displays usage information for the scmadm command.

-e

Reads the configuration and enables the storage device cache with
those parameters. See dscfg(1M).

-d

Shuts down the storage device cache.

-v

Displays the cache version number.

-C [parameter[=[value]] ...]

Sets or displays the configuration parameters. If the -C option is
specified with no arguments the current cache configuration parame‐
ters are displayed. If parameter is specified, the current value of
parameter is displayed. If parameter=value is specified, the cur‐
rent value of parameter is displayed and the parameter is changed
to value. If value is omitted, or if value is specified as the
null string, " ", or as "-", the parameter is deleted from the con‐
figuration and the system uses the default value. Multiple parame‐
ters can be specified in a single invocation of the scmadm command.
A change in a configuration parameter takes effect only when the
cache is next restarted.

-o { system | cd | diskname } [option]

Sets or displays the options for the system or for the cache device
specified by cd or diskname. If the option rdcache or nordcache is
specified, the system or specified cache device is set to that
option. The option is saved as part of the configuration so that
the option persists. See dscfg(1M). To notify the system to "for‐
get" about a saved option, use the forget option. This does not
change the option; it just removes the option from the saved con‐
figuration. If no option is specified, current options are dis‐
played. The rdcache option is set as the default. The options are
defined as follows:

rdcache

Data blocks are likely to be referenced again and should remain
in cache.

nordcache

Data blocks are unlikely to be referenced again and should be
treated as least recently used, so that other blocks can remain
in the cache longer.

-m { cd | diskname | all }

Displays the cache descriptor and diskname map for the device spec‐
ified by cd or diskname or, if you specify all, displays the cache
descriptors and diskname map for all storage devices on the system.

EXIT STATUS
The scmadm command returns 0 for success, non-zero for error.

FILES
/dev/sdbc

ATTRIBUTES
See attributes(5) for descriptions of the following attributes:

┌─────────────────────────────┬─────────────────────────────┐
│ ATTRIBUTE TYPE │ ATTRIBUTE VALUE │
├─────────────────────────────┼─────────────────────────────┤
│Availability │service/storage/avs/cache- │
│ │management, service/stor‐ │
│ │age/avs/cache-management │
├─────────────────────────────┼─────────────────────────────┤
│Interface Stability │Committed │
└─────────────────────────────┴─────────────────────────────┘