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Re: [Xen-devel] The file system type of DomU is ext2 or ext3?

To: Ye Zhou <zhouyejoe@xxxxxxxxxxx>
Subject: Re: [Xen-devel] The file system type of DomU is ext2 or ext3?
From: "Mohammad Abdul-Amir (Shamma)" <mohammadshamma@xxxxxxxxx>
Date: Mon, 21 Dec 2009 02:15:42 -0800
Cc: xen-devel <xen-devel@xxxxxxxxxxxxxxxxxxx>
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What are the contents of the DomU's /etc/fstab? One thing to check is the type of the root file system in that file.

2009/12/21 Ye Zhou <zhouyejoe@xxxxxxxxxxx>
Hi, all:
     At first I have an idea to improve the performance of the log mechanism in ext3 file system of DomU, but when I do some experiment in DomU, I find a strange thing.
     When I input command "df -lhT" to see the file system type, it shows that it is ext3. But when I input command "cat /proc/mounts", it shows that "/dev/root / ext2 rw".This means the type is still ext2. So I can't do my experiments.
     # df -lhT
     >Filesystem    Type    Size  Used Avail Use% Mounted on
     >/dev/sda1     ext3    9.2G  3.7G  5.1G  42% /
     >tmpfs        tmpfs    129M     0  129M   0% /dev/shm
     
 
     # cat /proc/mounts
     >rootfs / rootfs rw 0 0
     >/dev/root / ext2 rw 0 0
     >/proc /proc proc rw 0 0
     >/sys /sys sysfs rw 0 0
     >/proc/bus/usb /proc/bus/usb usbfs rw 0 0
     >none /dev tmpfs rw 0 0
     >devpts /dev/pts devpts rw 0 0
     >tmpfs /dev/shm tmpfs rw 0 0
     >none /proc/sys/fs/binfmt_misc binfmt_misc rw 0 0
     >sunrpc /var/lib/nfs/rpc_pipefs rpc_pipefs rw 0 0
     >/etc/auto.misc /misc autofs rw,fd=6,pgrp=2065,timeout=300,minproto=5,maxproto=5,indirect 0 0
     >-hosts /net autofs rw,fd=11,pgrp=2065,timeout=300,minproto=5,maxproto=5,indirect 0 0
 
      I made  the DomU OS image by simply copying the main files from Dom0,and in Dom0 it shows it is ext3.
      Whether I made the wrong way in making the image? Or there are some other problems? I don't kown why!
      Thanks all!
     
------------------
Best Regarding!
                Ye  Zhou
--------------------------------------------------------
Cluster and Grid Computing Lab
Services Computing Technology and System Lab
Department of Computer Science
Huazhong University of Science and Technology Wuhan, 430074, China
Mobile:+86-13437170320

 

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Mohammad Abdul-Amir (Shamma)
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