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head/cddl/contrib/opensolaris/cmd/zpool/zpool-features.7
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| .\" information: Portions Copyright [yyyy] [name of copyright owner] | .\" information: Portions Copyright [yyyy] [name of copyright owner] | ||||
| .\" | .\" | ||||
| .\" Copyright (c) 2012, 2017 by Delphix. All rights reserved. | .\" Copyright (c) 2012, 2017 by Delphix. All rights reserved. | ||||
| .\" Copyright (c) 2013 by Saso Kiselkov. All rights reserved. | .\" Copyright (c) 2013 by Saso Kiselkov. All rights reserved. | ||||
| .\" Copyright (c) 2013, Joyent, Inc. All rights reserved. | .\" Copyright (c) 2013, Joyent, Inc. All rights reserved. | ||||
| .\" | .\" | ||||
| .\" $FreeBSD$ | .\" $FreeBSD$ | ||||
| .\" | .\" | ||||
| .Dd June 7, 2017 | .Dd August 16, 2019 | ||||
| .Dt ZPOOL-FEATURES 7 | .Dt ZPOOL-FEATURES 7 | ||||
| .Os | .Os | ||||
| .Sh NAME | .Sh NAME | ||||
| .Nm zpool-features | .Nm zpool-features | ||||
| .Nd ZFS pool feature descriptions | .Nd ZFS pool feature descriptions | ||||
| .Sh DESCRIPTION | .Sh DESCRIPTION | ||||
| ZFS pool on\-disk format versions are specified via "features" which replace | ZFS pool on\-disk format versions are specified via "features" which replace | ||||
| the old on\-disk format numbers (the last supported on\-disk format number is | the old on\-disk format numbers (the last supported on\-disk format number is | ||||
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| .\" dump device on a pool comprised of multiple vdevs. | .\" dump device on a pool comprised of multiple vdevs. | ||||
| .It Sy spacemap_histogram | .It Sy spacemap_histogram | ||||
| .Bl -column "READ\-ONLY COMPATIBLE" "com.delphix:spacemap_histogram" | .Bl -column "READ\-ONLY COMPATIBLE" "com.delphix:spacemap_histogram" | ||||
| .It GUID Ta com.delphix:spacemap_histogram | .It GUID Ta com.delphix:spacemap_histogram | ||||
| .It READ\-ONLY COMPATIBLE Ta yes | .It READ\-ONLY COMPATIBLE Ta yes | ||||
| .It DEPENDENCIES Ta none | .It DEPENDENCIES Ta none | ||||
| .El | .El | ||||
| .Pp | .Pp | ||||
| This features allows ZFS to maintain more information about how free space | This feature allows ZFS to maintain more information about how free space | ||||
| is organized within the pool. | is organized within the pool. | ||||
| If this feature is | If this feature is | ||||
| .Sy enabled , | .Sy enabled , | ||||
| ZFS will | ZFS will | ||||
| set this feature to | set this feature to | ||||
| .Sy active | .Sy active | ||||
| when a new space map object is created or | when a new space map object is created or | ||||
| an existing space map is upgraded to the new format. | an existing space map is upgraded to the new format. | ||||
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