Note: "permalinks" may not be as permanent as we would like,
direct links of old sources may well be a few messages off.
Hi guys,
Why does iostat on cluster node HA03 show only drb0, while node HA04
shows both drbd0 and drbd1?
HA03:
[root at ha03 ~]# iostat
Linux 2.6.18-92.1.22.el5PAE (ha03.mycharts.md) 05/08/2009
avg-cpu: %user %nice %system %iowait %steal %idle
0.60 0.01 0.74 1.26 0.00 97.40
Device: tps Blk_read/s Blk_wrtn/s Blk_read Blk_wrtn
sda 90.36 3556.48 737.54 1132380817 234833149
dm-0 179.58 3524.76 620.27 1122280905 197492218
dm-1 4.57 0.12 36.45 39725 11606789
drbd0 160.86 3524.68 521.18 1122255260 165942472
[root at ha03 ~]# service drbd status
drbd driver loaded OK; device status:
version: 8.0.14 (api:86/proto:86)
GIT-hash: bb447522fc9a87d0069b7e14f0234911ebdab0f7 build by
root at ha03.mycharts.md, 2008-12-23 04:36:40
m:res cs st ds p mounted
fstype
0:ha_mysql Connected Primary/Secondary UpToDate/UpToDate C
/ha_mysql ext3
1:ha_ftp Connected Secondary/Primary UpToDate/UpToDate C
HA04:
[root at ha04 ~]# iostat
Linux 2.6.18-92.1.22.el5PAE (ha04.mycharts.md) 05/08/2009
avg-cpu: %user %nice %system %iowait %steal %idle
0.14 0.01 0.29 0.89 0.00 98.68
Device: tps Blk_read/s Blk_wrtn/s Blk_read Blk_wrtn
sda 69.39 544.57 867.66 173600433 276599076
dm-0 91.51 437.38 614.05 139431239 195751408
dm-1 11.47 95.84 36.58 30552183 11660807
drbd0 25.13 437.30 91.74 139405546 29246048
drbd1 11.30 95.71 36.43 30512394 11611928
[root at ha04 ~]# service drbd status
drbd driver loaded OK; device status:
version: 8.0.14 (api:86/proto:86)
GIT-hash: bb447522fc9a87d0069b7e14f0234911ebdab0f7 build by
root at ha04.mycharts.md, 2008-12-22 06:11:56
m:res cs st ds p mounted
fstype
0:ha_mysql Connected Secondary/Primary UpToDate/UpToDate C
1:ha_ftp Connected Primary/Secondary UpToDate/UpToDate C /ha_ftp
ext3
BONUS QUESTION
Why does the lvdisplay command on HA04 preceed ever line of output with
the word "lvdisplay?" Node HA03 does not do this.
[root at ha04 ~]# lvdisplay
lvdisplay --- Logical volume ---
lvdisplay LV Name /dev/vg01/lv01
lvdisplay VG Name vg01
lvdisplay LV UUID 0mpN50-4dDv-0prI-PLBd-slvJ-PStA-eCkxvC
lvdisplay LV Write Access read/write
lvdisplay LV Status available
lvdisplay # open 2
lvdisplay LV Size 400.00 GB
lvdisplay Current LE 102400
lvdisplay Segments 1
lvdisplay Allocation inherit
lvdisplay Read ahead sectors auto
lvdisplay - currently set to 256
lvdisplay Block device 253:0
lvdisplay
lvdisplay --- Logical volume ---
lvdisplay LV Name /dev/vg01/lv02
lvdisplay VG Name vg01
lvdisplay LV UUID AKbuTX-z1iE-GLhw-Nc1X-FERw-qrBL-HZBfJL
lvdisplay LV Write Access read/write
lvdisplay LV Status available
lvdisplay # open 2
lvdisplay LV Size 620.00 GB
lvdisplay Current LE 158720
lvdisplay Segments 1
lvdisplay Allocation inherit
lvdisplay Read ahead sectors auto
lvdisplay - currently set to 256
lvdisplay Block device 253:1
lvdisplay
--
Eric Robinson
Disclaimer - May 8, 2009
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