c618f87cd2
Deduplicated send and receive is deprecated. To ease migration to the new dedup-send-less world, the commit adds a `zstream redup` utility to convert deduplicated send streams to normal streams, so that they can continue to be received indefinitely. The new `zstream` command also replaces the functionality of `zstreamdump`, by way of the `zstream dump` subcommand. The `zstreamdump` command is replaced by a shell script which invokes `zstream dump`. The way that `zstream redup` works under the hood is that as we read the send stream, we build up a hash table which maps from `<GUID, object, offset> -> <file_offset>`. Whenever we see a WRITE record, we add a new entry to the hash table, which indicates where in the stream file to find the WRITE record for this block. (The key is `drr_toguid, drr_object, drr_offset`.) For entries other than WRITE_BYREF, we pass them through unchanged (except for the running checksum, which is recalculated). For WRITE_BYREF records, we change them to WRITE records. We find the referenced WRITE record by looking in the hash table (for the record with key `drr_refguid, drr_refobject, drr_refoffset`), and then reading the record header and payload from the specified offset in the stream file. This is why the stream can not be a pipe. The found WRITE record replaces the WRITE_BYREF record, with its `drr_toguid`, `drr_object`, and `drr_offset` fields changed to be the same as the WRITE_BYREF's (i.e. we are writing the same logical block, but with the data supplied by the previous WRITE record). This algorithm requires memory proportional to the number of WRITE records (same as `zfs send -D`), but the size per WRITE record is relatively low (40 bytes, vs. 72 for `zfs send -D`). A 1TB send stream with 8KB blocks (`recordsize=8k`) would use around 5GB of RAM to "redup". Reviewed-by: Jorgen Lundman <lundman@lundman.net> Reviewed-by: Paul Dagnelie <pcd@delphix.com> Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov> Signed-off-by: Matthew Ahrens <mahrens@delphix.com> Closes #10124 Closes #10156
104 lines
1.8 KiB
Makefile
104 lines
1.8 KiB
Makefile
dist_man_MANS = \
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fsck.zfs.8 \
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mount.zfs.8 \
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vdev_id.8 \
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zdb.8 \
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zfs.8 \
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zfsconcepts.8 \
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zfsprops.8 \
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zfs-allow.8 \
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zfs-bookmark.8 \
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zfs-change-key.8 \
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zfs-clone.8 \
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zfs-create.8 \
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zfs-destroy.8 \
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zfs-diff.8 \
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zfs-get.8 \
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zfs-groupspace.8 \
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zfs-hold.8 \
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zfs-inherit.8 \
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zfs-jail.8 \
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zfs-list.8 \
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zfs-load-key.8 \
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zfs-mount.8 \
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zfs-program.8 \
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zfs-project.8 \
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zfs-projectspace.8 \
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zfs-promote.8 \
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zfs-receive.8 \
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zfs-recv.8 \
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zfs-redact.8 \
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zfs-release.8 \
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zfs-rename.8 \
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zfs-rollback.8 \
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zfs-send.8 \
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zfs-set.8 \
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zfs-share.8 \
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zfs-snapshot.8 \
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zfs-unallow.8 \
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zfs-unjail.8 \
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zfs-unload-key.8 \
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zfs-unmount.8 \
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zfs-upgrade.8 \
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zfs-userspace.8 \
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zfs-wait.8 \
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zgenhostid.8 \
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zinject.8 \
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zpool.8 \
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zpoolconcepts.8 \
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zpoolprops.8 \
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zpool-add.8 \
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zpool-attach.8 \
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zpool-checkpoint.8 \
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zpool-clear.8 \
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zpool-create.8 \
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zpool-destroy.8 \
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zpool-detach.8 \
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zpool-events.8 \
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zpool-export.8 \
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zpool-get.8 \
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zpool-history.8 \
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zpool-import.8 \
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zpool-initialize.8 \
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zpool-iostat.8 \
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zpool-labelclear.8 \
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zpool-list.8 \
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zpool-offline.8 \
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zpool-online.8 \
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zpool-reguid.8 \
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zpool-remove.8 \
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zpool-reopen.8 \
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zpool-replace.8 \
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zpool-resilver.8 \
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zpool-scrub.8 \
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zpool-set.8 \
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zpool-split.8 \
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zpool-status.8 \
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zpool-sync.8 \
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zpool-trim.8 \
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zpool-upgrade.8 \
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zpool-wait.8 \
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zstream.8 \
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zstreamdump.8
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nodist_man_MANS = \
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zed.8 \
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zfs-mount-generator.8
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EXTRA_DIST = \
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zed.8.in \
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zfs-mount-generator.8.in
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$(nodist_man_MANS): %: %.in
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-$(SED) -e 's,@zfsexecdir\@,$(zfsexecdir),g' \
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-e 's,@systemdgeneratordir\@,$(systemdgeneratordir),g' \
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-e 's,@runstatedir\@,$(runstatedir),g' \
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-e 's,@sysconfdir\@,$(sysconfdir),g' \
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$< >'$@'
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install-data-local:
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$(INSTALL) -d -m 0755 "$(DESTDIR)$(mandir)/man8"
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CLEANFILES = \
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$(nodist_man_MANS)
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