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From fe2609302233148b8c670417748c0f036092c3d7 Mon Sep 17 00:00:00 2001
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From: Neal Gompa <ngompa13@gmail.com>
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Date: Sun, 12 Mar 2017 18:20:49 -0400
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Subject: [PATCH] Use --block-size with xz to make seekable xz-compressed
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 images (rhbz#984704)
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---
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 appcreate/appliance.py | 3 ++-
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 1 file changed, 2 insertions(+), 1 deletion(-)
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diff --git a/appcreate/appliance.py b/appcreate/appliance.py
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index e489494..61f1c46 100644
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--- a/appcreate/appliance.py
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+++ b/appcreate/appliance.py
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@@ -643,7 +643,8 @@ class ApplianceImageCreator(ImageCreator):
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                 dst = "%s/%s-%s.%s" % (self._outdir, self.name, name, self.__disk_format)
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                 if self.__compress:
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-                    rc = subprocess.call(["xz", "-z", src])
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+                    # Compress with xz using 16 MiB block size for seekability
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+                    rc = subprocess.call(["xz", "-z", "--block-size=16777216", src])
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                     if rc == 0:
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                         logging.debug("compression successful")
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                     if rc != 0:
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-- 
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2.9.3
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