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[Qemu-commits] [COMMIT 9ccb258] qcow2: Change default cluster size to 64


From: Anthony Liguori
Subject: [Qemu-commits] [COMMIT 9ccb258] qcow2: Change default cluster size to 64k
Date: Tue, 16 Jun 2009 21:25:06 -0000

From: Kevin Wolf <address@hidden>

Larger cluster sizes mean less metadata. This has been discussion a few times,
let's do it now. This turns 64k clusters on by default for new images.

Signed-off-by: Kevin Wolf <address@hidden>
Signed-off-by: Anthony Liguori <address@hidden>

diff --git a/block/qcow2.c b/block/qcow2.c
index c2be42e..14d8751 100644
--- a/block/qcow2.c
+++ b/block/qcow2.c
@@ -1703,7 +1703,7 @@ static int qcow_create(const char *filename, 
QEMUOptionParameter *options)
     const char *backing_fmt = NULL;
     uint64_t sectors = 0;
     int flags = 0;
-    size_t cluster_size = 4096;
+    size_t cluster_size = 65536;
 
     /* Read out options */
     while (options && options->name) {




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