Attachment 2769 Details for Bug 18765 – Lvm-Benchmark script

Lvm-Benchmark script

lvm-bench.sh (text/plain), 2.41 KB, created by Philipp Hahn on 2010-10-20 18:21:46 CEST

(hide)

Description:

Filename:

MIME Type:

Creator: Philipp Hahn

Created: 2010-10-20 18:21:46 CEST

Size: 2.41 KB

patch

obsolete

>#!/bin/sh
>msg () { tput setaf 1; echo "$*"; tput op; }
>
>msg ===== Write directly to hard-disk
>msg == 1. write block directly to hard-disk
>lvcreate -L 4G -n test1 vg_ucs
>#   Logical volume "test1" created
>echo 1 >/proc/sys/vm/drop_caches
>time dd if=/dev/zero bs=1M count=4k conv=fsync oflag=direct of=/dev/vg_ucs/test1
># 4096+0 DatensÃ¤tze ein
># 4096+0 DatensÃ¤tze aus
># 4294967296 Bytes (4,3 GB) kopiert, 47,1095 s, 91,2 MB/s
># 
># real    0m47.132s
># user    0m0.004s
># sys     0m4.428s
>
>msg ===== Write to CoW-end
>msg == 1. write block directly to hard-disk
>msg == 2. update CoW-table and write to disk
>lvcreate -s -L 4,1G -n test2 /dev/vg_ucs/test1
>#   Rounding up size to full physical extent 4,10 GB
>#   Logical volume "test2" created
>echo 1 >/proc/sys/vm/drop_caches
>time dd if=/dev/zero bs=1M count=4k conv=fsync oflag=direct of=/dev/vg_ucs/test2
># 4096+0 DatensÃ¤tze ein
># 4096+0 DatensÃ¤tze aus
># 4294967296 Bytes (4,3 GB) kopiert, 153,322 s, 28,0 MB/s
># 
># real    2m33.330s
># user    0m0.096s
># sys     0m13.125s
>
>msg ===== Write to CoW-end again
>msg == 1. write block directly to hard-disk
>echo 1 >/proc/sys/vm/drop_caches
>time dd if=/dev/zero bs=1M count=4k conv=fsync oflag=direct of=/dev/vg_ucs/test2
># 4096+0 DatensÃ¤tze ein
># 4096+0 DatensÃ¤tze aus
># 4294967296 Bytes (4,3 GB) kopiert, 48,3079 s, 88,9 MB/s
># 
># real    0m48.495s
># user    0m0.100s
># sys     0m19.761s
>
>msg ===== Write to origin-end
>msg == 1. read original block from origin
>msg == 2. write original block to CoW device
>msg == 3. update CoW-table and write to disk
>msg == 4. write modified block to origin
>lvremove -f /dev/vg_ucs/test2
>lvcreate -s -L 4,1G -n test3 /dev/vg_ucs/test1
>#   Rounding up size to full physical extent 4,10 GB
>#   Logical volume "test3" created
>echo 1 >/proc/sys/vm/drop_caches
>time dd if=/dev/zero bs=1M count=4k conv=fsync oflag=direct of=/dev/vg_ucs/test1
># 4096+0 DatensÃ¤tze ein
># 4096+0 DatensÃ¤tze aus
># 4294967296 Bytes (4,3 GB) kopiert, 195,556 s, 22,0 MB/s
># 
># real    3m15.760s
># user    0m0.096s
># sys     0m13.205s
>
>msg ===== Write to origin-end again
>msg == 1. write block directly to hard-disk
>echo 1 >/proc/sys/vm/drop_caches
>time dd if=/dev/zero bs=1M count=4k conv=fsync oflag=direct of=/dev/vg_ucs/test1
># 4096+0 DatensÃ¤tze ein
># 4096+0 DatensÃ¤tze aus
># 4294967296 Bytes (4,3 GB) kopiert, 59,0429 s, 72,7 MB/s
># 
># real    0m59.273s
># user    0m0.108s
># sys     0m17.181s
>
>lvremove -f /dev/vg_ucs/test3
>lvremove -f /dev/vg_ucs/test1

Actions: View

Attachments on bug 18765: 2768 | 2769