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| author | Guangyuan Yang <ygy@FreeBSD.org> | 2020-12-28 21:54:36 +0000 |
|---|---|---|
| committer | Guangyuan Yang <ygy@FreeBSD.org> | 2020-12-28 21:56:58 +0000 |
| commit | 70a2e109bd486f97e6fa5f969be9d90e404de016 (patch) | |
| tree | 29739d3eff7c3ade8b36fbf9592ff5620c24855c | |
| parent | 0c09f4b0cc633750a3cbf724e8590ed9d4ef92e1 (diff) | |
| download | src-70a2e109bd486f97e6fa5f969be9d90e404de016.tar.gz src-70a2e109bd486f97e6fa5f969be9d90e404de016.zip | |
dump(8): clarify the recommended use of cache and snapshots
PR: 131626
MFC after: 1 week
Submitted by: Andrew Hamilton-Wright <andrew@qemg.org>
Reviewed by: bcr
Differential Revision: https://reviews.freebsd.org/D27775
| -rw-r--r-- | sbin/dump/dump.8 | 10 |
1 files changed, 6 insertions, 4 deletions
diff --git a/sbin/dump/dump.8 b/sbin/dump/dump.8 index 56aea04551f8..80e8eae21d19 100644 --- a/sbin/dump/dump.8 +++ b/sbin/dump/dump.8 @@ -29,7 +29,7 @@ .\" @(#)dump.8 8.3 (Berkeley) 5/1/95 .\" $FreeBSD$ .\" -.Dd June 13, 2019 +.Dd December 28, 2020 .Dt DUMP 8 .Os .Sh NAME @@ -134,9 +134,11 @@ Specify the cache size in megabytes. This will greatly improve performance at the cost of .Nm -possibly not noticing changes in the file system between passes. -It is -recommended that you always use this option when dumping a snapshot. +possibly not noticing changes in the file system between passes +unless a snapshot is being used. +The potential for performance improvement indicates that +use of this option together with snapshots is the recommended +course of action. Beware that .Nm forks, and the actual memory use may be larger than the specified cache |