38 lines
1.4 KiB
Diff
38 lines
1.4 KiB
Diff
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From ef0ee0166b0594b04c73376f84a729c2985ca064 Mon Sep 17 00:00:00 2001
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From: "Richard W.M. Jones" <rjones@redhat.com>
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Date: Tue, 27 Jul 2021 23:10:24 +0100
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Subject: [PATCH] cow: Improve documentation of cow-on-cache option
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(cherry picked from commit 9731e80d58c3aed2514d249e7925c2053d6eb0e8)
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---
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filters/cow/nbdkit-cow-filter.pod | 13 +++++++------
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1 file changed, 7 insertions(+), 6 deletions(-)
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diff --git a/filters/cow/nbdkit-cow-filter.pod b/filters/cow/nbdkit-cow-filter.pod
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index 64df3fbd..2a693ebe 100644
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--- a/filters/cow/nbdkit-cow-filter.pod
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+++ b/filters/cow/nbdkit-cow-filter.pod
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@@ -54,12 +54,13 @@ serve the same data to each client.
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=item B<cow-on-cache=true>
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-Treat a client cache request as a shortcut for copying unmodified data
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-from the plugin to the overlay, rather than the default of passing
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-cache requests on to the plugin. This parameter defaults to false
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-(which leaves the overlay as small as possible), but setting it can be
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-useful for converting cache commands into a form of copy-on-read
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-behavior, in addition to the filter's normal copy-on-write semantics.
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+When the client issues a cache (prefetch) request, preemptively save
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+the data from the plugin into the overlay.
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+
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+=item B<cow-on-cache=false>
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+
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+Do not save data from cache (prefetch) requests in the overlay. This
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+leaves the overlay as small as possible. This is the default.
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=back
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--
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2.31.1
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