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13.19. File system test

寫寫空檔案

$ dd bs=1 seek=2TB if=/dev/null of=test
$ time dd if=/dev/zero of=/srv/file bs=1M count=1000
		

寫隨機檔案

$ time dd if=/dev/urandom of=test.txt bs=1M count=1000		
		

13.19.1. ext4 vs btrfs

			
$ cat /etc/fstab
# /etc/fstab: static file system information.
#
# Use 'blkid -o value -s UUID' to print the universally unique identifier
# for a device; this may be used with UUID= as a more robust way to name
# devices that works even if disks are added and removed. See fstab(5).
#
# <file system> <mount point>   <type>  <options>       <dump>  <pass>
proc            /proc           proc    nodev,noexec,nosuid 0       0
/dev/sda1       /               ext4    errors=remount-ro 0       1
# /opt was on /dev/sda7 during installation
UUID=5ce518a4-0f46-4688-8002-84bac2330282 /opt            btrfs   defaults        0       2
# /srv was on /dev/sda6 during installation
UUID=19573a64-f0a6-4250-a9fd-532e3d4e3477 /srv            ext4   defaults        0       2
# swap was on /dev/sda5 during installation
UUID=0f2e2f50-d989-47bf-afb7-7593888222cf none            swap    sw              0       0
			
			
			
neo@neo-Vostro-3400:~$ time dd if=/dev/zero of=/srv/file bs=1M count=100
100+0 records in
100+0 records out
104857600 bytes (105 MB) copied, 0.500941 s, 209 MB/s

real	0m0.521s
user	0m0.000s
sys	0m0.140s
neo@neo-Vostro-3400:~$ time dd if=/dev/zero of=/srv/file bs=1M count=100
100+0 records in
100+0 records out
104857600 bytes (105 MB) copied, 0.672553 s, 156 MB/s

real	0m0.698s
user	0m0.000s
sys	0m0.160s
neo@neo-Vostro-3400:~$ time dd if=/dev/zero of=/opt/file bs=1M count=100
100+0 records in
100+0 records out
104857600 bytes (105 MB) copied, 0.0987276 s, 1.1 GB/s

real	0m0.133s
user	0m0.000s
sys	0m0.120s
neo@neo-Vostro-3400:~$ time dd if=/dev/zero of=/opt/file bs=1M count=100
100+0 records in
100+0 records out
104857600 bytes (105 MB) copied, 0.101664 s, 1.0 GB/s

real	0m0.134s
user	0m0.000s
sys	0m0.140s



neo@neo-Vostro-3400:~$ time dd if=/dev/zero of=/srv/file bs=1M count=1000
1000+0 records in
1000+0 records out
1048576000 bytes (1.0 GB) copied, 11.8609 s, 88.4 MB/s

real	0m11.914s
user	0m0.010s
sys	0m1.360s
neo@neo-Vostro-3400:~$ time dd if=/dev/zero of=/opt/file bs=1M count=1000
1000+0 records in
1000+0 records out
1048576000 bytes (1.0 GB) copied, 9.80331 s, 107 MB/s

real	0m9.860s
user	0m0.000s
sys	0m0.880s
neo@neo-Vostro-3400:~$

			
			

13.19.2. xfs vs jfs vs reiserfs

			
$ cat /etc/fstab
# /etc/fstab: static file system information.
#
# <file system> <mount point>   <type>  <options>       <dump>  <pass>
proc            /proc           proc    defaults        0       0
# /dev/sda2       /               ext3    errors=remount-ro 0       1
UUID=8ce10c79-f97e-4585-8c07-75f64f043137       /               ext3    errors=remount-ro 0       1
# /dev/sda1       /boot           ext3    defaults        0       2
UUID=35705945-65ed-437b-9f79-fd0e014d100c       /boot           ext3    defaults        0       2
# /dev/sda5       /home           reiserfs defaults        0       2
UUID=f376adb7-e943-4805-892a-4fa457150b66       /home           reiserfs defaults        0       2
# /dev/sda7       /srv            xfs     defaults        0       2
UUID=2ee5c516-707f-47dc-a6a6-0d49d5dc9829       /srv            xfs     defaults        0       2
# /dev/sda8       /var            jfs     defaults        0       2
UUID=2928ba86-72fb-4b60-adc2-0f7d47e62d03       /var            jfs     defaults        0       2
# /dev/sda6       /var/www        ext3    defaults        0       2
UUID=34d3890f-a682-42ea-bdca-815f442e6539       /var/www        ext3    defaults        0       2
# /dev/sda3       none            swap    sw              0       0
UUID=bf605f47-70bc-4653-be98-c8659f959e25       none            swap    sw              0       0
/dev/scd0       /media/cdrom0   udf,iso9660 user,noauto     0       0

			
			
			
# XFS

neo@deployment:~$ time dd if=/dev/zero of=/srv/file bs=1M count=100
100+0 records in
100+0 records out
104857600 bytes (105 MB) copied, 0.0897329 s, 1.2 GB/s

real	0m0.117s
user	0m0.000s
sys	0m0.088s
neo@deployment:~$ time dd if=/dev/zero of=/srv/file bs=1M count=1000
1000+0 records in
1000+0 records out
1048576000 bytes (1.0 GB) copied, 4.86382 s, 216 MB/s

real	0m4.885s
user	0m0.000s
sys	0m0.960s

# JFS

neo@deployment:~$ time dd if=/dev/zero of=/var/tmp/file bs=1M count=100
100+0 records in
100+0 records out
104857600 bytes (105 MB) copied, 0.127605 s, 822 MB/s

real	0m0.157s
user	0m0.000s
sys	0m0.100s
neo@deployment:~$ time dd if=/dev/zero of=/var/tmp/file bs=1M count=1000
1000+0 records in
1000+0 records out
1048576000 bytes (1.0 GB) copied, 9.58573 s, 109 MB/s

real	0m9.597s
user	0m0.000s
sys	0m0.988s

# reiserfs

neo@deployment:~$ time dd if=/dev/zero of=/home/neo/file bs=1M count=100
100+0 records in
100+0 records out
104857600 bytes (105 MB) copied, 0.392038 s, 267 MB/s

real	0m0.430s
user	0m0.000s
sys	0m0.252s
neo@deployment:~$ time dd if=/dev/zero of=/home/neo/file bs=1M count=1000
1000+0 records in
1000+0 records out
1048576000 bytes (1.0 GB) copied, 4.62378 s, 227 MB/s

real	0m4.663s
user	0m0.000s
sys	0m2.592s

# EXT3

neo@deployment:~$ time dd if=/dev/zero of=/var/www/file bs=1M count=100
100+0 records in
100+0 records out
104857600 bytes (105 MB) copied, 0.189314 s, 554 MB/s

real	0m0.207s
user	0m0.004s
sys	0m0.176s
neo@deployment:~$ time dd if=/dev/zero of=/var/www/file bs=1M count=1000
1000+0 records in
1000+0 records out
1048576000 bytes (1.0 GB) copied, 6.46036 s, 162 MB/s

real	0m7.460s
user	0m0.008s
sys	0m1.832s
			
			

13.19.3. RAID10 (146G*8) vs EMC VNX 5300 (8G Fibre Channel)

伺服器RAID卡頻寬是6G,而Fibre Channel目前是8G,ISCSI與FCoE 可以提供 10G頻寬,InfiniBand可以提供120G頻寬。

# cat /etc/fstab
LABEL=/                 /                       ext3    defaults        1 1
LABEL=/boot             /boot                   ext3    defaults        1 2
tmpfs                   /dev/shm                tmpfs   defaults        0 0
devpts                  /dev/pts                devpts  gid=5,mode=620  0 0
sysfs                   /sys                    sysfs   defaults        0 0
proc                    /proc                   proc    defaults        0 0
LABEL=SWAP-sda3         swap                    swap    defaults        0 0
/dev/sda4               /home/oracle/rman       ext3    defaults        0 2
/dev/sdb1               /opt/oracle     ext3    defaults        0 2
/dev/emcpowerj1         /u02                    ext3    defaults        0 0

# df -h
Filesystem            Size  Used Avail Use% Mounted on
/dev/sda2              95G  7.8G   82G   9% /
/dev/sda1             1.9G   42M  1.8G   3% /boot
tmpfs                  63G  534M   63G   1% /dev/shm
/dev/sda4             924G  619G  258G  71% /home/oracle/rman
/dev/sdb1             1.1T  309G  735G  30% /opt/oracle
/dev/emcpowerj1       296G   20G  261G   7% /u02
			

IBM X3850 G5

# time dd if=/dev/zero of=file bs=1M count=100
100+0 records in
100+0 records out
104857600 bytes (105 MB) copied, 0.152702 seconds, 687 MB/s

real	0m0.154s
user	0m0.001s
sys	0m0.153s
# time dd if=/dev/zero of=file bs=1M count=1000
1000+0 records in
1000+0 records out
1048576000 bytes (1.0 GB) copied, 1.6589 seconds, 632 MB/s

real	0m1.710s
user	0m0.009s
sys	0m1.657s

# time dd if=/dev/zero of=file bs=1G count=2
2+0 records in
2+0 records out
2147483648 bytes (2.1 GB) copied, 3.48809 seconds, 616 MB/s

real	0m5.899s
user	0m0.000s
sys	0m5.594s
			

EMC

# time dd if=/dev/zero of=file bs=1M count=100
100+0 records in
100+0 records out
104857600 bytes (105 MB) copied, 0.175535 seconds, 597 MB/s

real	0m0.178s
user	0m0.001s
sys	0m0.171s
# time dd if=/dev/zero of=file bs=1M count=1000
1000+0 records in
1000+0 records out
1048576000 bytes (1.0 GB) copied, 1.67429 seconds, 626 MB/s

real	0m1.718s
user	0m0.002s
sys	0m1.664s
# time dd if=/dev/zero of=file bs=1G count=2
2+0 records in
2+0 records out
2147483648 bytes (2.1 GB) copied, 3.46919 seconds, 619 MB/s

real	0m3.757s
user	0m0.002s
sys	0m3.656s
			

13.19.4. Dell 2950(RAID5 500G SATA * 6) vs MD1200

			
# cat /etc/fstab
# /etc/fstab: static file system information.
#
# Use 'blkid -o value -s UUID' to print the universally unique identifier
# for a device; this may be used with UUID= as a more robust way to name
# devices that works even if disks are added and removed. See fstab(5).
#
# <file system> <mount point>   <type>  <options>       <dump>  <pass>
proc            /proc           proc    nodev,noexec,nosuid 0       0
# / was on /dev/sda1 during installation
UUID=2fc411ec-9f6e-4e04-9270-11d23a9b0668 /               ext4    errors=remount-ro 0       1
# swap was on /dev/sda2 during installation
UUID=f5175b7a-4c87-471c-ab9f-9d601bc5e6e2 none            swap    sw              0       0
UUID=3217bdd9-1beb-494a-a428-8d1c09eaa1af /backup ext4 errors=remount-ro 0       1
UUID=9bed3b85-bbc5-4aec-8c9a-8911712ea0c6 /backup1 ext4 errors=remount-ro 0       1
UUID=24bec385-2074-4eb5-8d24-22c33dc245d8 /backup2 ext4 errors=remount-ro 0       1


# df -h
Filesystem            Size  Used Avail Use% Mounted on
/dev/sda1              46G  8.6G   35G  20% /
none                  2.0G  212K  2.0G   1% /dev
none                  2.0G     0  2.0G   0% /dev/shm
none                  2.0G  9.0M  2.0G   1% /var/run
none                  2.0G     0  2.0G   0% /var/lock
none                   46G  8.6G   35G  20% /var/lib/ureadahead/debugfs
/dev/sda3             2.2T  2.0T   89G  96% /backup
/dev/sdc1             7.2T  6.0T  887G  88% /backup2
/dev/sdb1             9.0T  7.0T  1.6T  83% /backup1
			
			

/dev/sda 是2950 RAID5 500G*6 1000RPM

/dev/sdb 是MD1200 RAID5 2T*6 7200RPM

/dev/sdc 是MD1200 RAID50 2T*6 7200RPM

root@backup:~# time dd if=/dev/zero of=/backup/file bs=1M count=100
100+0 records in
100+0 records out
104857600 bytes (105 MB) copied, 0.156596 s, 670 MB/s

real	0m0.242s
user	0m0.010s
sys	0m0.150s
root@backup:~# time dd if=/dev/zero of=/backup/file bs=1M count=1000
1000+0 records in
1000+0 records out
1048576000 bytes (1.0 GB) copied, 4.61282 s, 227 MB/s

real	0m4.763s
user	0m0.000s
sys	0m1.640s
root@backup:~# time dd if=/dev/zero of=/backup/file bs=1G count=5
5+0 records in
5+0 records out
5368709120 bytes (5.4 GB) copied, 33.7263 s, 159 MB/s

real	0m34.685s
user	0m0.000s
sys	0m13.070s
root@backup:~# time dd if=/dev/zero of=/backup1/file bs=1M count=100
100+0 records in
100+0 records out
104857600 bytes (105 MB) copied, 0.130451 s, 804 MB/s

real	0m0.290s
user	0m0.000s
sys	0m0.130s
root@backup:~# time dd if=/dev/zero of=/backup1/file bs=1M count=1000
1000+0 records in
1000+0 records out
1048576000 bytes (1.0 GB) copied, 57.1654 s, 18.3 MB/s

real	0m57.206s
user	0m0.000s
sys	0m1.580s
root@backup:~# time dd if=/dev/zero of=/backup1/file bs=1G count=5
5+0 records in
5+0 records out
5368709120 bytes (5.4 GB) copied, 309.194 s, 17.4 MB/s

real	5m9.762s
user	0m0.000s
sys	0m10.820s
root@backup:~# time dd if=/dev/zero of=/backup2/file bs=1M count=100
100+0 records in
100+0 records out
104857600 bytes (105 MB) copied, 0.145224 s, 722 MB/s

real	0m0.333s
user	0m0.000s
sys	0m0.130s
root@backup:~# time dd if=/dev/zero of=/backup2/file bs=1M count=1000
1000+0 records in
1000+0 records out
1048576000 bytes (1.0 GB) copied, 41.9185 s, 25.0 MB/s

real	0m41.979s
user	0m0.010s
sys	0m1.930s
root@backup:~# time dd if=/dev/zero of=/backup2/file bs=1G count=5
5+0 records in
5+0 records out
5368709120 bytes (5.4 GB) copied, 200.384 s, 26.8 MB/s

real	3m20.850s
user	0m0.000s
sys	0m12.490s