similar to: LVM Read/Write speed <10% drive''s normal speed

Hi. I''m using Xen on RHEL cluster, and I have strange problems. I gave raw volumes from storage to Xen virtual machines. With windows, I have a problem that nodes don''t see the volume as same one.... for example: clusternode1# clusvcadm -d vm:winxp clusternode1# dd if=/dev/mapper/winxp of=/node1winxp clusternode2# dd if=/dev/mapper/winxp of=/node2winxp clusternode3# dd

Hi All, We''ve limitation of 500 GB per server as per ServerLoft. we are needing to store word/pdf files. We are planning to use following setup. /dev/sda1 - boot - ext2 /dev/sda2 - swap /dev/sda3 - dom0 - ext3 /dev/sda4 - LVM - one LV for each domU, We''re planning 3 DomUs. /dev/sda5 - FreeNAS. Is that possible? Can it be in one of the LVs under 4th partition? Currently, one

Hi Sriram, Once again, thanks for your timely reply.... I tested as your suggesstion and i found that i don''t have any file in the location "/var/lib/xen" [root@globushead xen]# pwd /var/lib/xen [root@globushead xen]# ls -ll total 0 Further i tested the command "xm save " and results as follows Terminal 1: xm save -c TestVM1 TestVM1.chkpt

Hi All, I have several Xen virtual machines within logical volumes using LVM2. I did not use disk images for performance reasons. Conventionally, if I want to clone my virtual machines, I have to dd the LV to an image file. But this consumes a lot of time and harddisk space. So, instead of doing that, I want to use losetup and kpartx with my logical volumes, which contain operating systems of

I have compiled a Dom0 kernel and kept in boot the images xen-test-vmlinuz initrd-test-2.6.29.img xen-3.3.gz my /boot/grub/menu.lst looks like this title TEST Xen 3.3 / Ubuntu 9.04 uuid 32ce16fb-1400-4d71-bb37-c98ef140e501 kernel /xen-3.3.gz module /xen-test-vmlinuz root=/dev/vga/dom0 ro console=tty0 module /initrd-test-2.6.29.2.img quiet I get

I''ve been using lvm under centos to create the backing store for domUs and although the performance seems acceptable it has some shortcomings. The biggest of which is the LVM bug which prevents me from removing an lv (it says it is still mounted and it definitely isnt). I thought this was just a centos bug but it appears to be evident in debian and ubuntu too and I really can''t

Hi, I have high IO-Wait on the ods (ceph), the osd are running a v3.1-rc9 kernel. I also experience high IO-rates, around 500IO/s reported via iostat. Device: rrqm/s wrqm/s r/s w/s rkB/s wkB/s avgrq-sz avgqu-sz await r_await w_await svctm %util sda 0.00 0.00 0.00 6.80 0.00 62.40 18.35 0.04 5.29 0.00 5.29 5.29 3.60 sdb

Hi, I have a Dom0 with LVMs. Also, I have 2 DomU's. What happen with DomU partitions if I resize Dom0 volumes? They changes of size too? Thanks in advance -- -- Open Kairos http://www.openkairos.com Watch More TV http://sebelk.blogspot.com Sergio Belkin -

Hello all! I've readed somes docs and I found nothing about the following trouble : I can't connect to my sbmd server using the following : '\\MYRH72SMBDSERVERNAME\'. I always got a error message like : 'Share name could not be found, make sure you typed it correctly....' , but if I utilize \\10.x.x.x\ all is working fine (I don't want to access using the \\IP\

An EXT3 filesystem technically isn't supposed to require an fsck, correct? Well, as per my last email re: EXT3 Crash?! I ran an fsck on a couple of my LVMs. It said they were clean, but then I decided to be 100% sure and force an fsck. Error after Error after Error after Error. I wound up losing almost half the data on my LVM due to all the errors. What's the real deal? Am I doing

I realize this might be one of those religious topics, but is there any good rule of thumb as to how to setup storage for a Xen domU? Without really knowing any better, I''m basically going to make a disk image of the OS and the create a ''data'' partition on my raid 5 volume for each virtual machine. This is for use at home, so in reality it probably doesn''t

Hi all, I am running Xen 3.2-1 / 2.6.18 on Debian Etch (Dom0). I setup a Dom0 with several DomUs (Linux). Each DomU disk is a LV partition. I have been seeing a few mails about backups and LVM and just wanted to make sure that what I am doing is correct. Each DomU with a database has a cron that dumps the db with mysqldump. Later on, Dom0 will do an LVM Snapshot of all DomUs and then do a

Hey, group, I've got a system installed on a VMware VM. The SAN administrator allocated me more disk space from the (EMC) SAN and I need ultimately to create another partition to mount on the filesystem. Two (initial) questions about this: What steps do I need to take prior to creating a new partition with fdisk? (The SAN space, BTW, is connected through VMware.) The OS is already

Hi all, I have another problem with starting domainU (xenolinux). I took me pretty much quite some time and i can not figure out why starting a new domain is failing. I will really appreciate if somebody can help me with this error. The error I get when booting xen-domainU is: /======================= Red Hat nash version 4.1.18 starting Mounted /proc filesystem Mounting sysfs Creating /dev

Hello listmates, I have encountered a rather peculiar situation. We have a Centos 6 VM (64 bit) running on a VMware vSphere 5.5 server. It was running just fine until one day I decided to reboot it and it just would not boot up. Effectively, dracut failed to initialize the LVM, much like under the scenario described here:

Hi all, Please excuse the many posts. Wondering if any one can help me with the the setup. I have 2x2TBdisks. I would like to mirror them. I would like to create two LVMs so that I can snap shot from one to the other. During Centos 6 install, how would I go about this as its confusing? So far I am here; 1) Created the following raid devices; md0 500MB (use it for /boot) md1 4000MB (use it

Hi guys, I''m running Xen 4.2.1, compiled manually so I can play with Remus and DRBD, running on Ubuntu 12.10. I keep getting this error when trying to start up my first VM to run the Ubuntu netboot installer. ----------------------------------------------------------------- root@left:/home/eross# xl create /etc/xen/ubuntu.cfg -c Parsing config from /etc/xen/ubuntu.cfg Daemon running

I'm having some difficulty finding a method to shrink my /home to expand my /.? They both correspond to LVMs.? It is my understanding that one cannot shrink a xfs filesystem.? One must back it up (xfsdump), remove (lvremove) redefine it and then restore it back (xfsrestore). Okay, I'm running into a problem where /home? needs to be "unused".? If tried going in to

Hi All, I am having an issue with an XFS filesystem shutting down under high load with very many small files. Basically, I have around 3.5 - 4 million files on this filesystem. New files are being written to the FS all the time, until I get to 9-11 mln small files (35k on average). at some point I get the following in dmesg: [2870477.695512] Filesystem "sda5": XFS internal error

Hi, I''m running Xen on a Debian Xeon E3110 using the Debian 2.6.26-2-xen kernel. As filesystem for my lvm domU partitions I choosed xfs. I get the following error in kern.log of domU when booting a domU: blkfront: sda2: write barrier op failed blkfront: sda2: barriers disabled end_request: I/O error, dev sda2, sector 0 end_request: I/O error, dev sda2, sector 0 Filesystem