Hi,
I am sorry for the very long email. And thanks a lot for all your patience.
1. DMESG doesn't show any "hard resetting link" at all.
2. The SSDs are connected to ATA 0 and ATA1. The server is brand new (or
at least it should be).
3. Partition table:
root [~]# cat /etc/fstab
# Created by anaconda on Wed Apr 3 17:22:52 2013
UUID=8fedde2c-f5b7-4edf-975f-d8d087d79ebf / ext4
noatime,usrjquota=quota.user,jqfmt=vfsv0 1 1
UUID=bfc50d02-6d4d-4510-93ea-27941cd49cf4 /boot ext4
noatime,defaults 1 2
UUID=cef1d19d-2578-43db-9ffc-b6b70e227bfa swap swap defaults 0 0
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
/usr/tmpDSK /tmp ext3
noatime,defaults,noauto 0 0
root [~]# cat /etc/mdadm.conf
# mdadm.conf written out by anaconda
MAILADDR root
AUTO +imsm +1.x -all
ARRAY /dev/md0 level=raid1 num-devices=2
UUID=8a4b7005:a4f71a13:7d4659cf:104f9a4f
ARRAY /dev/md1 level=raid1 num-devices=2
UUID=ead5b5ca:9f5397a2:3b488cbe:11eb8bdb
ARRAY /dev/md2 level=raid1 num-devices=2
UUID=44efd14d:8bcd26d4:4d1fda9f:a4b5fe14
root [/]# mount
/dev/md2 on / type ext4 (rw,noatime,usrjquota=quota.user,jqfmt=vfsv0)
proc on /proc type proc (rw)
sysfs on /sys type sysfs (rw)
devpts on /dev/pts type devpts (rw,gid=5,mode=620)
tmpfs on /dev/shm type tmpfs (rw,rootcontext="system_u:object_r:tmpfs_t:s0")
/dev/md0 on /boot type ext4 (rw,noatime)
none on /proc/sys/fs/binfmt_misc type binfmt_misc (rw)
/usr/tmpDSK on /tmp type ext3 (rw,noexec,nosuid,loop=/dev/loop0)
/tmp on /var/tmp type none (rw,noexec,nosuid,bind)
And now the tests you indicated:
4.
root [/]# echo 3 > /proc/sys/vm/drop_caches
root [~]# time cp largefile.tar.gz test03.tmp; time sync;
(this is probably when the file is read into some swap/cache)
real 0m3.052s
user 0m0.010s
sys 0m0.612s
(this is probably when the file is actually written)
real 1m2.570s
user 0m0.000s
sys 0m0.011s
root [/]# echo 3 > /proc/sys/vm/drop_caches
root [~]# time cp largefile.tar.gz test04.tmp;
real 0m3.848s
user 0m0.004s
sys 0m0.634s
After about 15 seconds the server load started to increase from 1,
spiked to 40 in about a minute and then it started decreasing.
5. The perf top -U output during a dd copy:
Samples: 2M of event 'cycles', Event count (approx.): 19505138470
9.10% [kernel] [k] page_fault
5.56% [kernel] [k] clear_page_c_e
3.29% [kernel] [k] list_del
2.51% [kernel] [k] unmap_vmas
2.50% [kernel] [k] __mem_cgroup_commit_charge
2.50% [kernel] [k] mem_cgroup_update_file_mapped
2.26% [kernel] [k] port_inb
1.89% [kernel] [k] shmem_getpage_gfp
1.78% [kernel] [k] _spin_lock
1.72% [kernel] [k] __alloc_pages_nodemask
1.67% [kernel] [k] __mem_cgroup_uncharge_common
1.61% [kernel] [k] free_pcppages_bulk
1.59% [kernel] [k] get_page_from_freelist
1.56% [kernel] [k] alloc_pages_vma
1.37% [kernel] [k] get_page
1.26% [kernel] [k] release_pages
1.22% [kernel] [k] radix_tree_lookup_slot
1.19% [kernel] [k] lookup_page_cgroup
1.11% [kernel] [k] handle_mm_fault
0.98% [kernel] [k] __wake_up_bit
0.98% [kernel] [k] copy_page_c
0.97% [kernel] [k] __d_lookup
0.94% [kernel] [k] __do_fault
0.92% [kernel] [k] free_hot_cold_page
0.80% [kernel] [k] find_vma
6. iotop is very dynamic and I am afraid the data I am providing will be
unclear but let me give a number of snapshots from during the large file
copy and maybe you can make something of it (samples a few seconds apart):
Total DISK READ: 15.39 K/s | Total DISK WRITE: 169.29 M/s
TID PRIO USER DISK READ DISK WRITE SWAPIN IO COMMAND
4236 be/4 nobody 0.00 B/s 0.00 B/s 0.00 % 0.00 % [httpd]
4662 be/4 nobody 0.00 B/s 0.00 B/s 0.00 % 0.00 % [httpd]
31126 be/4 mysql 0.00 B/s 46.17 K/s 0.00 % 0.00 % mysqld
--basedir=/ --datadir=/var/lib/mysql --user=mysql
--log-error=/var/lib/mysql/server.err --open-files-limit=50000
--pid-file=/var/$
4971 be/4 nobody 0.00 B/s 23.08 K/s 0.00 % 0.00 % [httpd]
5284 be/4 nobody 0.00 B/s 7.69 K/s 0.00 % 0.00 % [httpd]
9522 be/4 user 7.69 K/s 38.47 K/s 0.00 % 0.00 % spamd child
5547 be/4 nobody 0.00 B/s 7.69 K/s 0.00 % 0.00 % [httpd]
!!!!!! 6085 be/4 root 7.69 K/s 1004.85 M/s 0.00 % 0.00 % dd
if=largefile.tar.gz of=test10 oflag=sync bs=1G
Total DISK READ: 7.71 K/s | Total DISK WRITE: 29.91 M/s
TID PRIO USER DISK READ DISK WRITE SWAPIN IO COMMAND
506 be/4 root 0.00 B/s 0.00 B/s 0.00 % 99.99 % [md2_raid1]
30861 be/4 root 0.00 B/s 7.71 K/s 0.00 % 0.00 % httpd -k
start -DSSL
31346 be/4 root 0.00 B/s 7.71 K/s 0.00 % 0.00 % tailwatchd
1457 be/3 root 0.00 B/s 7.71 K/s 0.00 % 0.00 % auditd
5914 be/4 root 7.71 K/s 0.00 B/s 0.00 % 0.00 % cpanellogd
- scanning logs
6085 be/4 root 0.00 B/s 7.71 K/s 0.00 % 0.00 % dd
if=largefile.tar.gz of=test10 oflag=sync bs=1G
Total DISK READ: 0.00 B/s | Total DISK WRITE: 29.30 M/s
TID PRIO USER DISK READ DISK WRITE SWAPIN IO COMMAND
9522 be/4 user 0.00 B/s 0.00 B/s 0.00 % 99.99 % spamd child
506 be/4 root 0.00 B/s 0.00 B/s 0.00 % 99.99 % [md2_raid1]
31346 be/4 root 0.00 B/s 7.73 K/s 0.00 % 0.00 % tailwatchd
1397 be/4 root 0.00 B/s 7.73 K/s 0.00 % 0.00 % [flush-9:2]
6085 be/4 root 0.00 B/s 15.45 K/s 0.00 % 0.00 % dd
if=largefile.tar.gz of=test10 oflag=sync bs=1G
Total DISK READ: 12.43 K/s | Total DISK WRITE: 5.96 M/s
TID PRIO USER DISK READ DISK WRITE SWAPIN IO COMMAND
5914 be/4 root 0.00 B/s 0.00 B/s 0.00 % 99.99 % cpanellogd
- setting up logs for promusic
6101 be/4 mailnull 0.00 B/s 353.61 B/s 0.00 % 99.99 % exim -bd -q1h
6107 be/4 user 0.00 B/s 0.00 B/s 0.00 % 99.99 % pop3
6124 be/4 nobody 0.00 B/s 353.61 B/s 0.00 % 99.99 % httpd -k
start -DSSL
9522 be/4 user 1060.83 B/s 184.06 K/s 0.00 % 99.99 % spamd child
1669 be/4 root 0.00 B/s 2.42 K/s 0.00 % 99.99 % rsyslogd -i
/var/run/syslogd.pid -c 5
1235 be/4 root 0.00 B/s 2.42 K/s 0.00 % 98.28 % [kjournald]
506 be/4 root 0.00 B/s 0.00 B/s 0.00 % 28.46 % [md2_raid1]
541 be/3 root 0.00 B/s 34.04 M/s 0.00 % 3.43 % [jbd2/md2-8]
Total DISK READ: 303.21 K/s | Total DISK WRITE: 60.64 M/s
TID PRIO USER DISK READ DISK WRITE SWAPIN IO COMMAND
1235 be/4 root 0.00 B/s 60.64 K/s 0.00 % 99.99 % [kjournald]
541 be/3 root 0.00 B/s 0.00 B/s 0.00 % 96.16 % [jbd2/md2-8]
1232 be/0 root 0.00 B/s 0.00 B/s 0.00 % 81.07 % [loop0]
11449 be/4 mysql 250.15 K/s 0.00 B/s 0.00 % 12.84 % mysqld
--basedir=/ --datadir=/var/lib/mysql --user=mysql
--log-error=/var/lib/mysql/server.err --open-files-limit=50000
--pid-file=/var/$
6085 be/4 root 7.58 K/s 30.32 K/s 0.00 % 5.24 % dd
if=largefile.tar.gz of=test10 oflag=sync bs=1G
Total DISK READ: 2023.83 K/s | Total DISK WRITE: 82.31 M/s
TID PRIO USER DISK READ DISK WRITE SWAPIN IO COMMAND
6085 be/4 root 0.00 B/s 38.04 K/s 0.00 % 99.99 % dd
if=largefile.tar.gz of=test10 oflag=sync bs=1G
6267 be/4 user 0.00 B/s 0.00 B/s 0.00 % 99.99 % pop3
6291 be/4 user 0.00 B/s 0.00 B/s 0.00 % 99.99 % pop3
541 be/3 root 0.00 B/s 492.43 M/s 0.00 % 99.99 % [jbd2/md2-8]
6282 be/4 nobody 730.40 K/s 0.00 B/s 0.00 % 99.99 % httpd -k
start -DSSL
506 be/4 root 0.00 B/s 0.00 B/s 0.00 % 52.39 % [md2_raid1]
Total DISK READ: 74.61 K/s | Total DISK WRITE: 8.66 M/s
TID PRIO USER DISK READ DISK WRITE SWAPIN IO COMMAND
6282 be/4 nobody 26.55 K/s 0.00 B/s 0.00 % 97.65 % httpd -k
start -DSSL
541 be/3 root 0.00 B/s 7.04 M/s 0.00 % 95.64 % [jbd2/md2-8]
1235 be/4 root 0.00 B/s 0.00 B/s 0.00 % 94.07 % [kjournald]
1394 be/4 root 0.00 B/s 0.00 B/s 0.00 % 89.26 % [flush-7:0]
506 be/4 root 0.00 B/s 0.00 B/s 0.00 % 31.66 % [md2_raid1]
Total DISK READ: 544.44 K/s | Total DISK WRITE: 82.08 M/s
TID PRIO USER DISK READ DISK WRITE SWAPIN IO COMMAND
1235 be/4 root 0.00 B/s 129.31 K/s 0.00 % 99.99 % [kjournald]
541 be/3 root 0.00 B/s 63.57 M/s 0.00 % 99.99 % [jbd2/md2-8]
31119 be/4 mysql 0.00 B/s 61.25 K/s 0.00 % 88.49 % mysqld
--basedir=/ --datadir=/var/lib/mysql --user=mysql
--log-error=/var/lib/mysql/server.err --open-files-limit=50000
--pid-file=/var/$
506 be/4 root 0.00 B/s 0.00 B/s 0.00 % 72.41 % [md2_raid1]
31346 be/4 root 0.00 B/s 20.42 K/s 0.00 % 69.36 % tailwatchd
1232 be/0 root 0.00 B/s 183.75 K/s 0.00 % 54.04 % [loop0]
6085 be/4 root 3.40 K/s 40.83 K/s 0.00 % 26.49 % dd
if=largefile.tar.gz of=test10 oflag=sync bs=1G
11561 be/4 mysql 0.00 B/s 45.64 M/s 0.00 % 0.00 % mysqld
--basedir=/ --datadir=/var/lib/mysql --user=mysql
--log-error=/var/lib/mysql/server.err --open-files-limit=50000
--pid-file=/var/$
I have also run it with the "-a" flag and there is something interesting
(looong though heavily greped output below).
This is taken during the 'dd oflag=sync' copy. It seems it does
something right at the beginning (writes about 250MB of that files) than
it mostly idles through the end:
Total DISK READ: 333.35 K/s | Total DISK WRITE: 38.76 M/s
PID PRIO USER DISK READ DISK WRITE SWAPIN IO COMMAND
541 be/3 root 0.00 B 332.00 K 0.00 % 0.49 % [jbd2/md2-8]
13467 be/4 root 0.00 B 4.00 K 0.00 % 0.00 % python /usr/bin/iotop -baoP -d 1
13479 be/4 root 4.00 K 250.12 M 0.00 % 0.00 % dd if=largefile.tar.gz of=test11 oflag=sync bs=1G
Total DISK READ: 4.84 M/s | Total DISK WRITE: 11.77 K/s
PID PRIO USER DISK READ DISK WRITE SWAPIN IO COMMAND
541 be/3 root 0.00 B 332.00 K 0.00 % 0.37 % [jbd2/md2-8]
13467 be/4 root 0.00 B 4.00 K 0.00 % 0.00 % python /usr/bin/iotop -baoP -d 1
13479 be/4 root 4.00 K 250.12 M 0.00 % 0.00 % dd if=largefile.tar.gz of=test11 oflag=sync bs=1G
Total DISK READ: 0.00 B/s | Total DISK WRITE: 379.93 K/s
PID PRIO USER DISK READ DISK WRITE SWAPIN IO COMMAND
541 be/3 root 0.00 B 332.00 K 0.00 % 0.30 % [jbd2/md2-8]
13467 be/4 root 0.00 B 8.00 K 0.00 % 0.00 % python /usr/bin/iotop -baoP -d 1
13479 be/4 root 4.00 K 250.12 M 0.00 % 0.00 % dd if=largefile.tar.gz of=test11 oflag=sync bs=1G
1232 be/0 root 0.00 B 244.00 K 0.00 % 0.00 % [loop0]
1397 be/4 root 0.00 B 24.00 K 0.00 % 0.00 % [flush-9:2]
Total DISK READ: 0.00 B/s | Total DISK WRITE: 69.69 M/s
PID PRIO USER DISK READ DISK WRITE SWAPIN IO COMMAND
13479 be/4 root 4.00 K 250.16 M 0.00 % 79.98 % dd if=largefile.tar.gz of=test11 oflag=sync bs=1G
541 be/3 root 0.00 B 458.64 M 0.00 % 0.25 % [jbd2/md2-8]
13467 be/4 root 0.00 B 8.00 K 0.00 % 0.00 % python /usr/bin/iotop -baoP -d 1
1232 be/0 root 0.00 B 244.00 K 0.00 % 0.00 % [loop0]
1397 be/4 root 0.00 B 24.00 K 0.00 % 0.00 % [flush-9:2]
Total DISK READ: 20.81 K/s | Total DISK WRITE: 6.07 M/s
PID PRIO USER DISK READ DISK WRITE SWAPIN IO COMMAND
541 be/3 root 0.00 B 765.19 M 0.00 % 83.17 % [jbd2/md2-8]
1235 be/4 root 0.00 B 0.00 B 0.00 % 78.06 % [kjournald]
13479 be/4 root 8.00 K 250.24 M 0.00 % 60.66 % dd if=largefile.tar.gz of=test11 oflag=sync bs=1G
506 be/4 root 0.00 B 0.00 B 0.00 % 35.01 % [md2_raid1]
1394 be/4 root 0.00 B 0.00 B 0.00 % 11.25 % [flush-7:0]
Total DISK READ: 43.28 K/s | Total DISK WRITE: 34.09 M/s
PID PRIO USER DISK READ DISK WRITE SWAPIN IO COMMAND
541 be/3 root 0.00 B 767.47 M 0.00 % 84.84 % [jbd2/md2-8]
1235 be/4 root 0.00 B 28.00 K 0.00 % 70.65 % [kjournald]
13479 be/4 root 12.00 K 250.29 M 0.00 % 65.12 % dd if=largefile.tar.gz of=test11 oflag=sync bs=1G
506 be/4 root 0.00 B 0.00 B 0.00 % 31.81 % [md2_raid1]
1232 be/0 root 0.00 B 1568.00 K 0.00 % 14.57 % [loop0]
1394 be/4 root 0.00 B 0.00 B 0.00 % 9.71 % [flush-7:0]
1397 be/4 root 0.00 B 3.44 M 0.00 % 1.47 % [flush-9:2]
13467 be/4 root 0.00 B 12.00 K 0.00 % 0.00 % python /usr/bin/iotop -baoP -d 1
Total DISK READ: 3.85 K/s | Total DISK WRITE: 35.28 M/s
PID PRIO USER DISK READ DISK WRITE SWAPIN IO COMMAND
541 be/3 root 0.00 B 768.32 M 0.00 % 84.36 % [jbd2/md2-8]
1235 be/4 root 0.00 B 28.00 K 0.00 % 83.53 % [kjournald]
13479 be/4 root 12.00 K 250.30 M 0.00 % 65.05 % dd if=largefile.tar.gz of=test11 oflag=sync bs=1G
506 be/4 root 0.00 B 0.00 B 0.00 % 32.55 % [md2_raid1]
1232 be/0 root 0.00 B 1568.00 K 0.00 % 14.21 % [loop0]
1394 be/4 root 0.00 B 0.00 B 0.00 % 9.46 % [flush-7:0]
1397 be/4 root 0.00 B 3.45 M 0.00 % 1.48 % [flush-9:2]
Total DISK READ: 3.91 K/s | Total DISK WRITE: 3.91 K/s
PID PRIO USER DISK READ DISK WRITE SWAPIN IO COMMAND
541 be/3 root 0.00 B 768.32 M 0.00 % 82.29 % [jbd2/md2-8]
1235 be/4 root 0.00 B 28.00 K 0.00 % 81.48 % [kjournald]
13479 be/4 root 12.00 K 250.30 M 0.00 % 63.37 % dd if=largefile.tar.gz of=test11 oflag=sync bs=1G
506 be/4 root 0.00 B 0.00 B 0.00 % 31.75 % [md2_raid1]
1232 be/0 root 0.00 B 1568.00 K 0.00 % 13.86 % [loop0]
1394 be/4 root 0.00 B 0.00 B 0.00 % 9.23 % [flush-7:0]
1397 be/4 root 0.00 B 3.45 M 0.00 % 1.44 % [flush-9:2]
13467 be/4 root 0.00 B 28.00 K 0.00 % 0.00 % python /usr/bin/iotop -baoP -d 1
Total DISK READ: 15.64 K/s | Total DISK WRITE: 15.32 M/s
PID PRIO USER DISK READ DISK WRITE SWAPIN IO COMMAND
541 be/3 root 0.00 B 768.71 M 0.00 % 85.51 % [jbd2/md2-8]
1235 be/4 root 0.00 B 28.00 K 0.00 % 79.53 % [kjournald]
13479 be/4 root 12.00 K 250.31 M 0.00 % 61.78 % dd if=largefile.tar.gz of=test11 oflag=sync bs=1G
506 be/4 root 0.00 B 0.00 B 0.00 % 36.15 % [md2_raid1]
1232 be/0 root 0.00 B 1568.00 K 0.00 % 13.53 % [loop0]
1394 be/4 root 0.00 B 0.00 B 0.00 % 9.01 % [flush-7:0]
1397 be/4 root 0.00 B 3.45 M 0.00 % 6.60 % [flush-9:2]
13467 be/4 root 0.00 B 32.00 K 0.00 % 0.00 % python /usr/bin/iotop -baoP -d 1
Total DISK READ: 0.00 B/s | Total DISK WRITE: 0.00 B/s
PID PRIO USER DISK READ DISK WRITE SWAPIN IO COMMAND
541 be/3 root 0.00 B 768.71 M 0.00 % 85.77 % [jbd2/md2-8]
1235 be/4 root 0.00 B 28.00 K 0.00 % 75.90 % [kjournald]
13479 be/4 root 12.00 K 250.31 M 0.00 % 58.82 % dd if=largefile.tar.gz of=test11 oflag=sync bs=1G
506 be/4 root 0.00 B 0.00 B 0.00 % 34.51 % [md2_raid1]
1232 be/0 root 0.00 B 1568.00 K 0.00 % 12.91 % [loop0]
1394 be/4 root 0.00 B 0.00 B 0.00 % 8.60 % [flush-7:0]
1397 be/4 root 0.00 B 3.45 M 0.00 % 6.30 % [flush-9:2]
31346 be/4 root 0.00 B 120.00 K 0.00 % 3.42 % tailwatchd
13467 be/4 root 0.00 B 44.00 K 0.00 % 0.00 % python /usr/bin/iotop -baoP -d 1
Total DISK READ: 19.56 K/s | Total DISK WRITE: 10.12 M/s
PID PRIO USER DISK READ DISK WRITE SWAPIN IO COMMAND
541 be/3 root 0.00 B 768.76 M 0.00 % 86.39 % [jbd2/md2-8]
1235 be/4 root 0.00 B 28.00 K 0.00 % 74.21 % [kjournald]
13479 be/4 root 12.00 K 250.31 M 0.00 % 64.36 % dd if=largefile.tar.gz of=test11 oflag=sync bs=1G
506 be/4 root 0.00 B 0.00 B 0.00 % 39.86 % [md2_raid1]
1232 be/0 root 0.00 B 1568.00 K 0.00 % 12.62 % [loop0]
1394 be/4 root 0.00 B 0.00 B 0.00 % 8.41 % [flush-7:0]
1397 be/4 root 0.00 B 3.46 M 0.00 % 6.16 % [flush-9:2]
13467 be/4 root 0.00 B 48.00 K 0.00 % 0.00 % python /usr/bin/iotop -baoP -d 1
Total DISK READ: 0.00 B/s | Total DISK WRITE: 15.65 K/s
PID PRIO USER DISK READ DISK WRITE SWAPIN IO COMMAND
541 be/3 root 0.00 B 768.76 M 0.00 % 87.13 % [jbd2/md2-8]
1235 be/4 root 0.00 B 28.00 K 0.00 % 72.58 % [kjournald]
13479 be/4 root 12.00 K 250.31 M 0.00 % 65.64 % dd if=largefile.tar.gz of=test11 oflag=sync bs=1G
506 be/4 root 0.00 B 0.00 B 0.00 % 38.98 % [md2_raid1]
1232 be/0 root 0.00 B 1568.00 K 0.00 % 12.34 % [loop0]
1394 be/4 root 0.00 B 0.00 B 0.00 % 8.22 % [flush-7:0]
1397 be/4 root 0.00 B 3.46 M 0.00 % 6.03 % [flush-9:2]
13467 be/4 root 0.00 B 52.00 K 0.00 % 0.00 % python /usr/bin/iotop -baoP -d 1
Total DISK READ: 46.71 K/s | Total DISK WRITE: 38.92 K/s
PID PRIO USER DISK READ DISK WRITE SWAPIN IO COMMAND
541 be/3 root 0.00 B 768.76 M 0.00 % 87.24 % [jbd2/md2-8]
1235 be/4 root 0.00 B 28.00 K 0.00 % 71.03 % [kjournald]
13479 be/4 root 12.00 K 250.31 M 0.00 % 66.24 % dd if=largefile.tar.gz of=test11 oflag=sync bs=1G
506 be/4 root 0.00 B 0.00 B 0.00 % 38.15 % [md2_raid1]
1232 be/0 root 0.00 B 1568.00 K 0.00 % 12.08 % [loop0]
1394 be/4 root 0.00 B 0.00 B 0.00 % 8.05 % [flush-7:0]
1397 be/4 root 0.00 B 3.46 M 0.00 % 5.90 % [flush-9:2]
13467 be/4 root 0.00 B 56.00 K 0.00 % 0.00 % python /usr/bin/iotop -baoP -d 1
Total DISK READ: 0.00 B/s | Total DISK WRITE: 0.00 B/s
PID PRIO USER DISK READ DISK WRITE SWAPIN IO COMMAND
541 be/3 root 0.00 B 768.76 M 0.00 % 87.63 % [jbd2/md2-8]
1235 be/4 root 0.00 B 28.00 K 0.00 % 69.54 % [kjournald]
13479 be/4 root 12.00 K 250.31 M 0.00 % 67.10 % dd if=largefile.tar.gz of=test11 oflag=sync bs=1G
506 be/4 root 0.00 B 0.00 B 0.00 % 42.88 % [md2_raid1]
1232 be/0 root 0.00 B 1568.00 K 0.00 % 11.83 % [loop0]
1394 be/4 root 0.00 B 0.00 B 0.00 % 7.88 % [flush-7:0]
1397 be/4 root 0.00 B 3.46 M 0.00 % 5.78 % [flush-9:2]
13467 be/4 root 0.00 B 60.00 K 0.00 % 0.00 % python /usr/bin/iotop -baoP -d 1
Total DISK READ: 7.82 K/s | Total DISK WRITE: 0.00 B/s
PID PRIO USER DISK READ DISK WRITE SWAPIN IO COMMAND
541 be/3 root 0.00 B 768.76 M 0.00 % 87.91 % [jbd2/md2-8]
1235 be/4 root 0.00 B 28.00 K 0.00 % 68.12 % [kjournald]
13479 be/4 root 12.00 K 250.31 M 0.00 % 67.83 % dd if=largefile.tar.gz of=test11 oflag=sync bs=1G
506 be/4 root 0.00 B 0.00 B 0.00 % 42.01 % [md2_raid1]
1232 be/0 root 0.00 B 1568.00 K 0.00 % 11.59 % [loop0]
1394 be/4 root 0.00 B 0.00 B 0.00 % 7.72 % [flush-7:0]
1397 be/4 root 0.00 B 3.46 M 0.00 % 5.66 % [flush-9:2]
13467 be/4 root 0.00 B 68.00 K 0.00 % 0.00 % python /usr/bin/iotop -baoP -d 1
Total DISK READ: 0.00 B/s | Total DISK WRITE: 50.84 K/s
PID PRIO USER DISK READ DISK WRITE SWAPIN IO COMMAND
541 be/3 root 0.00 B 768.76 M 0.00 % 88.16 % [jbd2/md2-8]
1235 be/4 root 0.00 B 28.00 K 0.00 % 66.75 % [kjournald]
13479 be/4 root 12.00 K 250.31 M 0.00 % 68.51 % dd if=largefile.tar.gz of=test11 oflag=sync bs=1G
506 be/4 root 0.00 B 0.00 B 0.00 % 41.16 % [md2_raid1]
1232 be/0 root 0.00 B 1568.00 K 0.00 % 11.35 % [loop0]
1394 be/4 root 0.00 B 0.00 B 0.00 % 7.56 % [flush-7:0]
1397 be/4 root 0.00 B 3.46 M 0.00 % 5.54 % [flush-9:2]
13467 be/4 root 0.00 B 72.00 K 0.00 % 0.00 % python /usr/bin/iotop -baoP -d 1
Total DISK READ: 3.91 K/s | Total DISK WRITE: 93.83 K/s
PID PRIO USER DISK READ DISK WRITE SWAPIN IO COMMAND
541 be/3 root 0.00 B 768.76 M 0.00 % 88.33 % [jbd2/md2-8]
13479 be/4 root 12.00 K 250.31 M 0.00 % 69.09 % dd if=largefile.tar.gz of=test11 oflag=sync bs=1G
1235 be/4 root 0.00 B 28.00 K 0.00 % 65.44 % [kjournald]
506 be/4 root 0.00 B 0.00 B 0.00 % 40.35 % [md2_raid1]
1232 be/0 root 0.00 B 1568.00 K 0.00 % 11.13 % [loop0]
1394 be/4 root 0.00 B 0.00 B 0.00 % 7.41 % [flush-7:0]
1397 be/4 root 0.00 B 3.46 M 0.00 % 5.43 % [flush-9:2]
31346 be/4 root 0.00 B 120.00 K 0.00 % 2.95 % tailwatchd
13467 be/4 root 0.00 B 76.00 K 0.00 % 0.00 % python /usr/bin/iotop -baoP -d 1
Total DISK READ: 0.00 B/s | Total DISK WRITE: 0.00 B/s
PID PRIO USER DISK READ DISK WRITE SWAPIN IO COMMAND
541 be/3 root 0.00 B 768.76 M 0.00 % 88.53 % [jbd2/md2-8]
13479 be/4 root 12.00 K 250.31 M 0.00 % 69.69 % dd if=largefile.tar.gz of=test11 oflag=sync bs=1G
1235 be/4 root 0.00 B 28.00 K 0.00 % 64.18 % [kjournald]
506 be/4 root 0.00 B 0.00 B 0.00 % 39.57 % [md2_raid1]
1232 be/0 root 0.00 B 1568.00 K 0.00 % 10.91 % [loop0]
1394 be/4 root 0.00 B 0.00 B 0.00 % 7.27 % [flush-7:0]
1397 be/4 root 0.00 B 3.46 M 0.00 % 5.33 % [flush-9:2]
13467 be/4 root 0.00 B 80.00 K 0.00 % 0.00 % python /usr/bin/iotop -baoP -d 1
Total DISK READ: 0.00 B/s | Total DISK WRITE: 15.64 K/s
PID PRIO USER DISK READ DISK WRITE SWAPIN IO COMMAND
541 be/3 root 0.00 B 768.76 M 0.00 % 88.20 % [jbd2/md2-8]
13479 be/4 root 12.00 K 250.31 M 0.00 % 69.72 % dd if=largefile.tar.gz of=test11 oflag=sync bs=1G
1235 be/4 root 0.00 B 28.00 K 0.00 % 62.96 % [kjournald]
506 be/4 root 0.00 B 0.00 B 0.00 % 38.82 % [md2_raid1]
1232 be/0 root 0.00 B 1568.00 K 0.00 % 10.71 % [loop0]
1394 be/4 root 0.00 B 0.00 B 0.00 % 7.13 % [flush-7:0]
1397 be/4 root 0.00 B 3.46 M 0.00 % 5.23 % [flush-9:2]
13467 be/4 root 0.00 B 84.00 K 0.00 % 0.00 % python /usr/bin/iotop -baoP -d 1
Total DISK READ: 0.00 B/s | Total DISK WRITE: 0.00 B/s
PID PRIO USER DISK READ DISK WRITE SWAPIN IO COMMAND
541 be/3 root 0.00 B 768.76 M 0.00 % 88.61 % [jbd2/md2-8]
13479 be/4 root 12.00 K 250.31 M 0.00 % 70.50 % dd if=largefile.tar.gz of=test11 oflag=sync bs=1G
1235 be/4 root 0.00 B 28.00 K 0.00 % 61.79 % [kjournald]
506 be/4 root 0.00 B 0.00 B 0.00 % 38.10 % [md2_raid1]
1232 be/0 root 0.00 B 1568.00 K 0.00 % 10.51 % [loop0]
1394 be/4 root 0.00 B 0.00 B 0.00 % 7.00 % [flush-7:0]
1397 be/4 root 0.00 B 3.46 M 0.00 % 5.13 % [flush-9:2]
13467 be/4 root 0.00 B 92.00 K 0.00 % 0.00 % python /usr/bin/iotop -baoP -d 1
Total DISK READ: 258.12 K/s | Total DISK WRITE: 86.04 K/s
PID PRIO USER DISK READ DISK WRITE SWAPIN IO COMMAND
541 be/3 root 0.00 B 768.76 M 0.00 % 89.19 % [jbd2/md2-8]
13479 be/4 root 12.00 K 250.31 M 0.00 % 71.45 % dd if=largefile.tar.gz of=test11 oflag=sync bs=1G
1235 be/4 root 0.00 B 28.00 K 0.00 % 60.66 % [kjournald]
506 be/4 root 0.00 B 0.00 B 0.00 % 37.40 % [md2_raid1]
1232 be/0 root 0.00 B 1568.00 K 0.00 % 10.32 % [loop0]
1394 be/4 root 0.00 B 0.00 B 0.00 % 6.87 % [flush-7:0]
1397 be/4 root 0.00 B 3.46 M 0.00 % 5.04 % [flush-9:2]
13467 be/4 root 0.00 B 96.00 K 0.00 % 0.00 % python /usr/bin/iotop -baoP -d 1
I appologize for such a lengthy email!
Kind regards!
Andrei Banu
--
To unsubscribe from this list: send the line "unsubscribe linux-raid" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
