From: Michael <mclaud@roznica.com.ua>
To: linux-btrfs@vger.kernel.org
Subject: Re: [RFC PATCH v10 00/16] Online(inband) data deduplication
Date: Fri, 11 Apr 2014 21:00:09 +0300 [thread overview]
Message-ID: <53482DA9.4090101@roznica.com.ua> (raw)
Hi Liu,
Thanks for your work.
Each test copy 2gb file from sdf (btrfs) to sde (btrfs with dedup 4k
blocksize).
Before every test i recreate filesystem.
On second write all goods.
Test 1
Nodesize = leafsize = 4k
Write overhead ~ x1.5
Test 2
Nodesize = leafsize = 16k
Write overhead ~ x19
Test 1:
fs created label (null) on /dev/sde
nodesize 4096 leafsize 4096 sectorsize 4096 size 931.32GiB
Btrfs v3.14-dirty
./btrfs dedup enable /mnt/backupkvm/ ; ./btrfs dedup on -b4k
/mnt/backupkvm/
[root@hranilka2 ~]# cat /sys/block/sde/stat
157149 3096 1285992 128900 6472058 12962342 718660664
1511294062 0 1576195 1527264468
[root@hranilka2 ~]# cat /sys/block/sde/stat
157149 3096 1285992 128900 6526802 13268740 724690168
1512117500 0 1587233 1528090320
write sectors: 724690168 - 718660664 = 6029504 sector
write mbyte: 6029504 * 512 / 1024 / 1024 ~ 2944 mb
[root@hranilka2 ~]# cat /sys/block/sdf/stat
338633 165 346540680 7043771 7 4 1496 35
0 610795 7043095
[root@hranilka2 ~]# cat /sys/block/sdf/stat
342737 165 350743176 7127546 7 4 1496 35
0 618652 7126860
read sectors: 350743176 - 346540680 = 4202496 sector
read mbyte: 4202496 * 512 / 1024 / 1024 ~ 2052 mb
Test 2:
fs created label (null) on /dev/sde
nodesize 16384 leafsize 16384 sectorsize 4096 size 931.32GiB
Btrfs v3.14-dirty
./btrfs dedup enable /mnt/backupkvm/ ; ./btrfs dedup on -b4k
/mnt/backupkvm/
[root@hranilka2 ~]# cat /sys/block/sde/stat
157440 3313 1290392 129277 6526912 13272046 724722864
1512117920 0 1587500 1528091116
[root@hranilka2 ~]# cat /sys/block/sde/stat
157440 3313 1290392 129277 6964494 13836479 803994376
1514935880 0 1730081 1530910351
write sectors: 803994376 - 724722864 = 79271512 sector
write mbyte: 79271512 * 512 / 1024 / 1024 ~ 38706 mb
[root@hranilka2 ~]# cat /sys/block/sdf/stat
342737 165 350743176 7127546 7 4 1496 35
0 618652 7126860
[root@hranilka2 ~]# cat /sys/block/sdf/stat
346841 165 354945672 7266231 7 4 1496 35
0 629824 7265539
read sectors: 354945672 - 350743176 = 4202496 sector
read mbyte: 4202496 * 512 / 1024 / 1024 ~ 2052 mb
--
Michael Serikov
--
next reply other threads:[~2014-04-11 18:00 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-04-11 18:00 Michael [this message]
-- strict thread matches above, loose matches on Subject: below --
2014-04-10 3:48 [RFC PATCH v10 00/16] Online(inband) data deduplication Liu Bo
2014-04-10 9:08 ` Konstantinos Skarlatos
2014-04-10 15:44 ` Liu Bo
2014-04-10 15:55 ` Liu Bo
2014-04-11 9:28 ` Martin Steigerwald
2014-04-11 9:51 ` Liu Bo
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=53482DA9.4090101@roznica.com.ua \
--to=mclaud@roznica.com.ua \
--cc=linux-btrfs@vger.kernel.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.