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4171 clean up spa_feature_*() interfaces
4172 implement extensible_dataset feature for use by other zpool features
Reviewed by: Max Grossman <max.grossman@delphix.com>
Reviewed by: Christopher Siden <christopher.siden@delphix.com>
Reviewed by: George Wilson <george.wilson@delphix.com>


 254 .sp
 255 .ne 2
 256 .na
 257 \fB\fBmulti_vdev_crash_dump\fR\fR
 258 .ad
 259 .RS 4n
 260 .TS
 261 l l .
 262 GUID    com.joyent:multi_vdev_crash_dump
 263 READ\-ONLY COMPATIBLE   no
 264 DEPENDENCIES    none
 265 .TE
 266 
 267 This feature allows a dump device to be configured with a pool comprised
 268 of multiple vdevs.  Those vdevs may be arranged in any mirrored or raidz
 269 configuration.
 270 
 271 When the \fBmulti_vdev_crash_dump\fR feature is set to \fBenabled\fR,
 272 the administrator can use the \fBdumpadm\fR(1M) command to configure a
 273 dump device on a pool comprised of multiple vdevs.

 274 






















 275 .SH "SEE ALSO"
 276 \fBzpool\fR(1M)



 254 .sp
 255 .ne 2
 256 .na
 257 \fB\fBmulti_vdev_crash_dump\fR\fR
 258 .ad
 259 .RS 4n
 260 .TS
 261 l l .
 262 GUID    com.joyent:multi_vdev_crash_dump
 263 READ\-ONLY COMPATIBLE   no
 264 DEPENDENCIES    none
 265 .TE
 266 
 267 This feature allows a dump device to be configured with a pool comprised
 268 of multiple vdevs.  Those vdevs may be arranged in any mirrored or raidz
 269 configuration.
 270 
 271 When the \fBmulti_vdev_crash_dump\fR feature is set to \fBenabled\fR,
 272 the administrator can use the \fBdumpadm\fR(1M) command to configure a
 273 dump device on a pool comprised of multiple vdevs.
 274 .RE
 275 
 276 .sp
 277 .ne 2
 278 .na
 279 \fB\fBextensible_dataset\fR\fR
 280 .ad
 281 .RS 4n
 282 .TS
 283 l l .
 284 GUID    com.delphix:extensible_dataset
 285 READ\-ONLY COMPATIBLE   no
 286 DEPENDENCIES    none
 287 .TE
 288 
 289 This feature allows more flexible use of internal ZFS data structures,
 290 and exists for other features to depend on.
 291 
 292 This feature will be \fBactive\fR when the first dependent feature uses it,
 293 and will be returned to the \fBenabled\fR state when all datasets that use
 294 this feature are destroyed.
 295 
 296 .RE
 297 
 298 .SH "SEE ALSO"
 299 \fBzpool\fR(1M)