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OpenZFS 9256 - zfs send space estimation off by > 10% on some datasets

Browse Source 
Authored by: Paul Dagnelie <pcd@delphix.com>
Reviewed by: Matt Ahrens <matt@delphix.com>
Reviewed by: John Kennedy <john.kennedy@delphix.com>
Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Approved by: Richard Lowe <richlowe@richlowe.net>
Ported-by: Giuseppe Di Natale <dinatale2@llnl.gov>

Porting Notes:
* Added tuning to man page.
* Test case changes dropped, default behavior unchanged.

OpenZFS-issue: https://www.illumos.org/issues/9256
OpenZFS-commit: https://github.com/openzfs/openzfs/commit/32356b3c56
Closes #7470
This commit is contained in:
Paul Dagnelie
2016-08-26 11:43:21 -07:00
committed by Brian Behlendorf
parent 4ceb8dd6fd
commit ca0845d59e
3 changed files with 27 additions and 3 deletions
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man/man5/zfs-module-parameters.5
+11
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@@ -1143,6 +1143,17 @@ Maximum number of blocks freed in a single txg.
Default value: \fB100,000\fR.
.RE
.sp
.ne 2
.na
\fBzfs_override_estimate_recordsize\fR (ulong)
.ad
.RS 12n
Record size calculation override for zfs send estimates.
.sp
Default value: \fB0\fR.
.RE
.sp
.ne 2
.na