From: "Lakshmipathi.G" <lakshmipathi.g@giis.co.in>
To: linux-btrfs@vger.kernel.org
Subject: understanding csum tree
Date: Thu, 12 Nov 2015 20:21:58 +0530 [thread overview]
Message-ID: <20151112145158.GA13251@giis.domain.name> (raw)
Hi -
I trying to understand csum tree and its entries.
1) create a filenamed 'ab' with 100KB of data. I can see csum entry for
this:
item 0 key (EXTENT_CSUM EXTENT_CSUM 4239360) itemoff 3895 itemsize 100
2) created another named 'zb1' with 100KB of data. I can't find csum
entry for this.Looks like item-0 is extended with csum of zb1.
item 0 key (EXTENT_CSUM EXTENT_CSUM 4239360) itemoff 3795 itemsize 200
If I need to read/print only the csum of 'zb1' file - how to achieve
that? thanks!
btrfs-debug-tree output : http://pastebin.com/tzKLX2ZU
after creating zb1 file : http://pastebin.com/WzjJuzFB
Cheers,
Lakshmipathi.G
reply other threads:[~2015-11-12 15:22 UTC|newest]
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