Login or Register to Ask a Question and Join Our Community

Sponsored Content
Full Discussion: How to test RAID10 array performance [Debian Wheezy]?
Top Forums UNIX for Advanced & Expert Users How to test RAID10 array performance [Debian Wheezy]? Post 302918591 by gacanepa on Wednesday 24th of September 2014 10:30:37 AM
Old 09-24-2014
Dave,
Thanks again!
As for pvdisplay and lvdisplay, I must mention here that these RAID arrays are not on LVMs (but here is the output of the commands anyway):

Code:
root@debian:~# pvdisplay
  --- Physical volume ---
  PV Name               /dev/sda5
  VG Name               debian
  PV Size               9.76 GiB / not usable 2.00 MiB
  Allocatable           yes (but full)
  PE Size               4.00 MiB
  Total PE              2498
  Free PE               0
  Allocated PE          2498
  PV UUID               0VU3Cr-2uLV-68Y8-W9hZ-uwav-APT7-or633a
   
root@debian:~# lvdisplay
  --- Logical volume ---
  LV Path                /dev/debian/root
  LV Name                root
  VG Name                debian
  LV UUID                Vuyq6i-Ctxr-nz4f-MIYi-x6fB-Fgif-Gjommv
  LV Write Access        read/write
  LV Creation host, time debian, 2014-08-12 21:27:22 -0300
  LV Status              available
  # open                 1
  LV Size                332.00 MiB
  Current LE             83
  Segments               1
  Allocation             inherit
  Read ahead sectors     auto
  - currently set to     256
  Block device           254:0
   
  --- Logical volume ---
  LV Path                /dev/debian/usr
  LV Name                usr
  VG Name                debian
  LV UUID                VIKvTb-Kl4V-l2Uw-K5Zp-vjjG-BCoP-MFO2d5
  LV Write Access        read/write
  LV Creation host, time debian, 2014-08-12 21:27:23 -0300
  LV Status              available
  # open                 1
  LV Size                3.41 GiB
  Current LE             874
  Segments               1
  Allocation             inherit
  Read ahead sectors     auto
  - currently set to     256
  Block device           254:2
   
  --- Logical volume ---
  LV Path                /dev/debian/var
  LV Name                var
  VG Name                debian
  LV UUID                LPUuFP-JX6Q-ShWJ-otNN-aBvu-DKNg-SxJfcv
  LV Write Access        read/write
  LV Creation host, time debian, 2014-08-12 21:27:23 -0300
  LV Status              available
  # open                 1
  LV Size                1.66 GiB
  Current LE             425
  Segments               1
  Allocation             inherit
  Read ahead sectors     auto
  - currently set to     256
  Block device           254:3
   
  --- Logical volume ---
  LV Path                /dev/debian/swap_1
  LV Name                swap_1
  VG Name                debian
  LV UUID                fLMGxe-ksTR-VNbM-rknH-G6OR-Aq1z-Q2RIwP
  LV Write Access        read/write
  LV Creation host, time debian, 2014-08-12 21:27:23 -0300
  LV Status              available
  # open                 2
  LV Size                560.00 MiB
  Current LE             140
  Segments               1
  Allocation             inherit
  Read ahead sectors     auto
  - currently set to     256
  Block device           254:1
   
  --- Logical volume ---
  LV Path                /dev/debian/tmp
  LV Name                tmp
  VG Name                debian
  LV UUID                BgKzko-pArn-LGq9-gLRG-xYFM-clc1-dJkzyN
  LV Write Access        read/write
  LV Creation host, time debian, 2014-08-12 21:27:23 -0300
  LV Status              available
  # open                 1
  LV Size                300.00 MiB
  Current LE             75
  Segments               1
  Allocation             inherit
  Read ahead sectors     auto
  - currently set to     256
  Block device           254:4
   
  --- Logical volume ---
  LV Path                /dev/debian/home
  LV Name                home
  VG Name                debian
  LV UUID                viKzZn-oOmC-JI88-itWv-26vw-eVoG-6RWWGL
  LV Write Access        read/write
  LV Creation host, time debian, 2014-08-12 21:27:23 -0300
  LV Status              available
  # open                 1
  LV Size                3.52 GiB
  Current LE             901
  Segments               1
  Allocation             inherit
  Read ahead sectors     auto
  - currently set to     256
  Block device           254:5
   
root@debian:~#

mdadm.conf (I just realize the definition for /dev/md1 is missing, but I am failing to understand how that would help to the understanding of why the RAID10, with its current configuration, is not performing as well as it should be)
Code:
# Please refer to mdadm.conf(5) for information about this file.
#

# by default (built-in), scan all partitions (/proc/partitions) and all
# containers for MD superblocks. alternatively, specify devices to scan, using
# wildcards if desired.
#DEVICE partitions containers

# auto-create devices with Debian standard permissions
CREATE owner=root group=disk mode=0660 auto=yes

# automatically tag new arrays as belonging to the local system
HOMEHOST <system>

# instruct the monitoring daemon where to send mail alerts
MAILADDR root

# definitions of existing MD arrays
ARRAY /dev/md/0 metadata=1.2 UUID=d9a83766:cdec2926:53d85d4a:01f535ca name=debian:0

# This file was auto-generated on Wed, 10 Sep 2014 23:25:15 -0300
# by mkconf 3.2.5-5

 

8 More Discussions You Might Find Interesting

1. Debian

apt-get problems on Wheezy

I am having some troubles with apt-get. I did an apt-get update and an apt-get upgrade. Some dependencies did not download, and so I had to do `apt-get -f install` to fix that. The thing is I get an error about /var/lib/dpkg/available root@hayek:~# apt-get -f install Reading package lists...... (3 Replies)
Discussion started by: John Tate
3 Replies

2. Shell Programming and Scripting

How do I test the first char of each line in an array

Hi folks, I am self-learning as I can I have a script that has read a file into an array. I can read out each line in the array with the code: for INDEX in {0..$LENGTH} ## $LENGTH was determined at the read in do echo "${data}" done What I need to do is test the first char... (2 Replies)
Discussion started by: Marc G
2 Replies

3. Shell Programming and Scripting

[solved] awk: test assoc. array for content

Hi all, I am looking for a quick/short way in awk to check if an associative array has any content. I know I can split() it to an indexed array and check if the 1st element is set, or cycle through it with something like for( ele in arr ), but I want to avoid that, as I am looking for a shorter... (3 Replies)
Discussion started by: zaxxon
3 Replies

4. Linux

Unload kernel module at boot time (Debian Wheezy 7.2, 3.2.0-4-686-pae kernel)

Hi everyone, I am trying to prevent the ehci_hcd kernel module to load at boot time. Here's what I've tried so far: 1) Add the following line to /etc/modprobe.d/blacklist.conf (as suggested here): 2) Blacklisted the module by adding the following string to 3) Tried to blacklist the module... (0 Replies)
Discussion started by: gacanepa
0 Replies

5. Shell Programming and Scripting

Bash - array loop performance

Hi, another little question... "sn" is an array whose elements can vary from about 55,000 to about 150,000 elements. Each element consists of an integer between 0-255, eg: ${sn} contain the value: 103 . For a decrypt-procedure I need scroll all the elements 4 or 5 times. Here is an example of... (15 Replies)
Discussion started by: math4
15 Replies

6. HP-UX

Test cases for file system mount/umount performance in HP

Hi Folks, Could anyone please assist me with the what could be the scenarios to test the file system mount/umount performance check in HPUX. Thanks in advance, Vaishey (5 Replies)
Discussion started by: Vaishey
5 Replies

7. AIX

Power RAID10 array reconstruct fails ?

Hello, P7 machine PCI Express x8 Planar 3Gb SAS Adapter RAID10 array(2 disks)(not AIX lvm) was configured and working, then one disk failed and IBM support replaced that. Now raid array is degraded, data is not lost. I see new disk model(same as original) serial and etc. What I did trying... (0 Replies)
Discussion started by: vilius
0 Replies

8. Shell Programming and Scripting

If test array element multiplication

Ya, I know, who in this day and age is mirroring rootvg...? But yes, my shop does and I need to script checking for it. I also know I could just inverse the the logic and call the LV mirrored if the LPs and PPs were not equal. But I want to do the math in the if test and also know I could... (5 Replies)
Discussion started by: gtsonoma
5 Replies
All times are GMT -4. The time now is 01:39 PM.
Unix & Linux Forums Content Copyright 1993-2022. All Rights Reserved.
Privacy Policy