diff options
| -rw-r--r-- | man/man8/zfs.8 | 48 |
1 files changed, 34 insertions, 14 deletions
diff --git a/man/man8/zfs.8 b/man/man8/zfs.8 index dabc1f694..031c05c21 100644 --- a/man/man8/zfs.8 +++ b/man/man8/zfs.8 @@ -144,7 +144,7 @@ zfs \- configures ZFS file systems .LP .nf -\fBzfs\fR \fBsend\fR [\fB-DnPpRrv\fR] [\fB-\fR[\fBiI\fR] \fIsnapshot\fR] \fIsnapshot\fR +\fBzfs\fR \fBsend\fR [\fB-DnPpRv\fR] [\fB-\fR[\fBiI\fR] \fIsnapshot\fR] \fIsnapshot\fR .fi .LP @@ -2322,7 +2322,7 @@ Unshare the specified filesystem. The command can also be given a path to a \fBZ .ne 2 .mk .na -\fBzfs send\fR [\fB-DnPpRrv\fR] [\fB-\fR[\fBiI\fR] \fIsnapshot\fR] \fIsnapshot\fR +\fBzfs send\fR [\fB-DnPpRv\fR] [\fB-\fR[\fBiI\fR] \fIsnapshot\fR] \fIsnapshot\fR .ad .sp .6 .RS 4n @@ -2355,49 +2355,69 @@ Generate a stream package that sends all intermediary snapshots from the first s .ne 2 .mk .na -\fB\fB-v\fR\fR +\fB\fB-R\fR\fR .ad .sp .6 .RS 4n -Print verbose information about the stream package generated. This information -includes a per-second report of how much data has been sent. +Generate a replication stream package, which will replicate the specified filesystem, and all descendent file systems, up to the named snapshot. When received, all properties, snapshots, descendent file systems, and clones are preserved. +.sp +If the \fB-i\fR or \fB-I\fR flags are used in conjunction with the \fB-R\fR flag, an incremental replication stream is generated. The current values of properties, and current snapshot and file system names are set when the stream is received. If the \fB-F\fR flag is specified when this stream is received, snapshots and file systems that do not exist on the sending side are destroyed. .RE .sp .ne 2 .mk .na -\fB\fB-R\fR\fR +\fB\fB-D\fR\fR .ad .sp .6 .RS 4n -Generate a replication stream package, which will replicate the specified filesystem, and all descendent file systems, up to the named snapshot. When received, all properties, snapshots, descendent file systems, and clones are preserved. -.sp -If the \fB-i\fR or \fB-I\fR flags are used in conjunction with the \fB-R\fR flag, an incremental replication stream is generated. The current values of properties, and current snapshot and file system names are set when the stream is received. If the \fB-F\fR flag is specified when this stream is received, snapshots and file systems that do not exist on the sending side are destroyed. +Generate a deduplicated stream. Blocks which would have been sent multiple times in the send stream will only be sent once. The receiving system must also support this feature to recieve a deduplicated stream. This flag can be used regardless of the dataset's dedup property, but performance will be much better if the filesystem uses a dedup-capable checksum (eg. sha256). .RE .sp .ne 2 .mk .na -\fB\fB-D\fR\fR +\fB\fB-p\fR\fR +.ad +.sp .6 +.RS 4n +Include the dataset's properties in the stream. This flag is implicit when -R is specified. The receiving system must also support this feature. +.RE + +.sp +.ne 2 +.na +\fB\fB-n\fR\fR .ad .sp .6 .RS 4n -This option will cause dedup processing to be performed on the data being written to a send stream. Dedup processing is optional because it isn't always appropriate (some kinds of data have very little duplication) and it has significant costs: the checksumming required to detect duplicate blocks is CPU-intensive and the data that must be maintained while the stream is being processed can occupy a very large amount of memory. +Do a dry-run ("No-op") send. Do not generate any actual send data. This is +useful in conjunction with the \fB-v\fR or \fB-P\fR flags to determine what +data will be sent. +.RE + .sp -Duplicate blocks are detected by calculating a cryptographically strong checksum on each data block. Blocks that have the same checksum are presumed to be identical. The checksum type used at this time is SHA256. However, the stream format contains a field which identifies the checksum type, permitting other checksums to be used in the future. +.ne 2 +.na +\fB\fB-P\fR\fR +.ad +.sp .6 +.RS 4n +Print machine-parsable verbose information about the stream package generated. .RE .sp .ne 2 .mk .na -\fB\fB-p\fR\fR +\fB\fB-v\fR\fR .ad .sp .6 .RS 4n -Include properties in the send stream without the -R option. +Print verbose information about the stream package generated. This information +includes a per-second report of how much data has been sent. .RE The format of the stream is committed. You will be able to receive your streams on future versions of \fBZFS\fR. |