Shulou(Shulou.com)06/02 Report--

Test the occupancy of Cache disk when writing in ceph environment

[root@localhost ~] # lsblk

NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT

Sr0 11:0 1 1024M 0 rom

Sdb 8:16 0 20G 0 disk

└─ cachedev-0 (dm-4) 253 dm-4 4 0 20G 0 dm / sandstone-data/sds-0

Sda 8:0 0 50G 0 disk

├─ sda1 8:1 0 500M 0 part / boot

└─ sda2 8:2 0 49.5G 0 part

├─ VolGroup-lv_root (dm-0) 253 dm-0 0 0 45.6G 0 lvm /

└─ VolGroup-lv_swap (dm-1) 253 dm-1 1 0 3.9G 0 lvm [SWAP]

Sdc 8:32 0 20G 0 disk

├─ vg_mix-lv_journal_0_0 (dm-2) 253 dm-2 2 0 8G 0 lvm

└─ vg_mix-lv_cache_0_0 (dm-3) 253 dm-3 3 0 12G 0 lvm

└─ cachedev-0 (dm-4) 253 dm-4 4 0 20G 0 dm / sandstone-data/sds-0

Sdd 8:48 0 10G 0 disk

Sde 8:64 0 10G 0 disk

Sdf 8:80 0 10G 0 disk

[root@localhost ~] #

First shell:

[root@localhost ~] # dd if=/dev/zero of=/dev/sdd bs=1M count=1000

Second shell:

[root@localhost ~] # iostat-dxt 1

Linux 2.6.32-358.11.1.2.ky3.1.x86_64 (localhost.localdomain) October 23, 2017 _ x86 CPU 644)

18:27:31 on October 23, 2017

Device: rrqm/s wrqm/s rUnip s wdeband s rsec/s wsec/s avgrq-sz avgqu-sz await svctm% util

Sdb 0.01 5.12 0.05 1.59 0.47 53.67 33.11 0.03 19.76 7.90 1.29

Sda 0.06 46.33 1.28 44.61 24.24 727.82 16.39 5.33 116.08 1.70 7.81

Sdc 0.76 1.20 5.25 4.24 54.36 67.44 12.83 0.10 10.14 4.70 4.46

Dm-0 0.00 0.00 0.22 90.94 13.70 727.82 8.13 7.03 77.15 0.84 7.65

Dm-1 0.00 0.00 0.00 0.01 0.00 8.00 0.00 7.87 2.71 0.00

Dm-2 0.00 0.00 0.19 1.87 1.51 38.52 19.47 0.03 14.93 8.38 1.72

Dm-3 0.00 0.00 1.00 3.48 8.03 28.18 8.08 0.14 30.85 4.76 2.13

Dm-4 0.00 0.00 0.08 8.54 0.67 68.34 8.00 1.72 199.06 3.18 2.74

Sdd 0.00 1.35 0.00 0.01 0.01 10.33 894.49 0.08 6452.67 34.39 0.04

Sde 0.00 0.00 0.00 0.01 0.00 8.00 0.00 2.74 2.74 0.00

Sdf 0.00 0.00 0.00 0.01 0.00 8.00 0.00 2.74 2.74 0.00

18:27:32 on October 23, 2017

Device: rrqm/s wrqm/s rUnip s wdeband s rsec/s wsec/s avgrq-sz avgqu-sz await svctm% util

Sdb 0.00 595.00 0.00 13.00 0.00 7384.00 568.00 0.88 139.38 22.85 29.70

Sda 0.00 12.00 10.00 1012.00 88.00 8152.00 8.06 144.63 93.69 0.98 100.00

Sdc 0.00 69.00 5.00 16.00 544.00 7376.00 377.14 36.40 563.48 47.62 100.00

Dm-0 0.00 0.00 2.00 1004.00 16.00 8032.00 8.00 147.08 95.42 0.99 100.00

Dm-1 0.00 0.00 0.00

Dm-2 0.00 0.00 0.00 19.00 0.00 8584.00 451.79 9.95 379.74 52.37 99.50

Dm-3 0.00 0.00 2.00 69.00 16.00 552.00 8.00 927.73 2342.27 14.08 100.00

Dm-4 0.00 0.00 2.00 606.00 16.00 4848.00 8.00 1195.77 439.58 1.64 100.00

Sdd 0.00 3937.00 0.00 16.00 0.00 15368.00 960.50 143.73 5219.94 62.50 100.00

Sde 0.00 0.00 0.00

Sdf 0.00 0.00 0.00

The environment is a ceph environment. Sdc serves as a cache disk for journal and cache.

The following is the block and other information of the virtual disk:

[root@localhost] # smartctl-a / dev/sdc

Smartctl 5.43 2012-06-30 r3573 [x86_64-linux-2.6.32-358.11.1.2.ky3.1.x86_64] (local build)

Copyright (C) 2002-12 by Bruce Allen, http://smartmontools.sourceforge.net

Vendor: VMware

Product: Virtual disk

Revision: 1.0

User Capacity: 21474836480 bytes [21.4 GB]

Logical block size: 512 bytes

Logical Unit id: 0x6000c29586aa7f7d928e86417eb5e2ff

Serial number: 6000c29586aa7f7d928e86417eb5e2ff

Device type: disk

Local Time is: Mon Oct 23 18:30:39 2017 CST

Device does not support SMART

Error Counter logging not supported

Device does not support Self Test logging

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