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authorShawn O. Pearce <spearce@spearce.org>2010-02-01 09:27:35 -0800
committerJunio C Hamano <gitster@pobox.com>2010-02-01 12:09:47 -0800
commit5eef828bc03649ba11acc05c983d72823c27f0bb (patch)
tree2554847a2c6f7853bf2b9b8226de1ccca67ce828 /Documentation/git-fast-import.txt
parent63d04a78043c61c52ae437fa6106e7029b466bbf (diff)
downloadgit-5eef828bc03649ba11acc05c983d72823c27f0bb.tar.gz
git-5eef828bc03649ba11acc05c983d72823c27f0bb.tar.xz
fast-import: Stream very large blobs directly to pack
If a blob is larger than the configured big-file-threshold, instead of reading it into a single buffer obtained from malloc, stream it onto the end of the current pack file. Streaming the larger objects into the pack avoids the 4+ GiB memory footprint that occurs when fast-import is processing 2+ GiB blobs. Signed-off-by: Shawn O. Pearce <spearce@spearce.org> Signed-off-by: Junio C Hamano <gitster@pobox.com>
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diff --git a/Documentation/git-fast-import.txt b/Documentation/git-fast-import.txt
index e6d364f53..79c5f69d4 100644
--- a/Documentation/git-fast-import.txt
+++ b/Documentation/git-fast-import.txt
@@ -50,6 +50,12 @@ OPTIONS
importers may wish to lower this, such as to ensure the
resulting packfiles fit on CDs.
+--big-file-threshold=<n>::
+ Maximum size of a blob that fast-import will attempt to
+ create a delta for, expressed in bytes. The default is 512m
+ (512 MiB). Some importers may wish to lower this on systems
+ with constrained memory.
+
--depth=<n>::
Maximum delta depth, for blob and tree deltification.
Default is 10.