Server :: Creation Of Clustered Storage On CentOS 5.5?

Sep 25, 2010

What I am trying to to is set up a cluster as follows:

- There are four nodes
- Nodes three and four have large amounts of storage that will be used for storing user data.
- Nodes one and two will be running a couple of network services.

I'd like have nodes one and two to have a clustered filesystem just between them to store data for the services run only by it possible to share one filesystem between two nodes and another filesystem between two other nodes? The cluster seems to try to make the storage changes across all nodes. They will not be able to spend the extra money to get the same storage in all four nodes. Here is what I have done. I am using CentOS 5.5. After installing CentOS, I did this:

On all nodes:


[root@node1 ~]# yum groupinstall "Clustering"
[root@node1 ~]# yum groupinstall "Cluster Storage"
[root@node1 ~]# chkconfig ricci on


...which I think makes sense because the cluster was supposed to create the PV and the volume group, but did not. I don't even think it tries. The first time it tries to do anything to another node is when I create a logical volume.

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CentOS 5 :: LVM2 Clustered Mirror Monitor And Repair?

Apr 8, 2009

I am using LVM2 Clustering to mirror logical volumes between 2 different storage arrays ( iscsi target hosts). Everything is up and running fine, but I would like to be able to monitor the status of the mirror(s), and "re-sync" them if necessary.

I have attempted the locate the information from Google. From what I have read, lvdisplay -v should tell me whether the mirrors are in sync, but it either is not, or I am simply miss reading it. I have come also across information stating lvchange -m [ 0 | # ] should be used to add or remove mirror copies. Is the is correct / only way to "resync" a mirror, in the event that I can determine the mirror is actually out sync?

For those who are familiar with Symantec's VERITAS volume manager, I am looking get the equivalent information related to plexes from vxprint, the equivalent function from /etc/vx/bin/vxreattach -br, and the progress information from vxtask list. I hope the information is currently "search challenged", or I am simply not fully comprehending what I have found.

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Ubuntu :: Stop Automatic Thumbnail Creation And Storage?

Jan 31, 2011

I was lurking about my hidden files and noticed the ".thumbnails" directory. I had been browsing the web for about an hour and had opened some image files from my drive.HOLY CRAP! I had over 2000 thumbnails in that directory! Every time an image is displayed, a thumbnail of it is created? Really? Seriously, I don't care what the reason behind this "feature" is, how do I stop it? It is simply unnecessary and a waste of disk space.

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CentOS 5 :: CentOS5 With Clustered Lvm2 : Not Booting Anymore (VolGroup00 Not Activated)?

Sep 13, 2010

I "inherited" a cluster of 2 systems with XenCluster, based on CentOS 5.5. About five weeks ago I ran the (long overdue) yum update, which crashed in the middle of updating on both nodes, so I had to reinstall all those packages by hand and had to re-enable their startup. So both systems are already in the not-ideal state.

One system rebooted itself during my absence and now won't boot anymore. It seems to boil down to clustered lvm not being activated in the initrd and therefore no VolGroup00 available, which contains the root. The other volume group has good reasons to be clustered but the root does not need to be. But I can't fix it from a rescue CD, every time the error comes up that the volume group is clustered.The exact error display at boot is at

what do I do to either fix the startup to ignore VolGroup00 being clustered OR change the status of VolGroup00 to non-clustered?I notice the other system has this too so my best guess is that I'll have the same problem in a bigger way when this system reboots too. Hoping for no power failures...Relevant versions of stuff:

centos 5.5
kernel 2.6.18-194.11.1.el5xen

(from the still running system)

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General :: Samba Server Creation On CentOS 5.5

Jan 17, 2011

How to configure Samaba Server on CentOS 5.5 and how to synchronize with my Windows Server-2003.

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CentOS 5 Server :: What Storage Type To Choose?

Jun 21, 2011

We new have server with VmWare ESXi4.1 and we created virtual machine with CentOS5.6.This CentOS5.6 virtual machine will be used as webserver. We need to backup all files and have access to these files. We are going to keep all websites, databases, backups on data storage (NetApp FAS2000 series).

We have two options to how to use this storage:

1: We can mount storage volume directly to CentOS5.6 by NFS.

2: We can add storage via NFS to VmWare and then add new virtual disks to CentOS5.6 by VmWare vSphere client.

What option would you recommend to use? Which option is better, faster and more secure? My thoughts:If we mount storage volume directly to CentOS5.6 so we can access .snapshot directory there is all snapshots. So it's easy to access all backed up files. NetApp has snapshot system and we can schedule to make snapshots automatically, so we don't need to setup any additional backup utilities in CentOS5.6. But we don't have any NetApp snapshot restoring software license so copy/paste from .snapshot directory is only option.

If we add storage to VmWare firstly (by NFS) and then add new virtual hard disks to CentOS5.6 by VmWare vSphere client so we have to setup rsnapshot(or any similar utility) to make backups in CentOS5.6. But NetApp will also make backups of .vmdk files. So it's like double backups, lol :) If storage crashes so we screwed in both ways, I think.

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CentOS 5 Server :: Create GFS Shared Storage Without SAN/iSCSI

Sep 3, 2009

I built a CentOS 5 Linux cluster with GFS storage using local RAID volume and share it with gnbd_export/import on two web-servers. Now I need to expand that storage to another servers local volume. I saw the picture in the manual, but I don`t know, how can I create that scheme.

I can use gnbd_export on the second server and gnbd_import on the first. In that case I will have two volumes on the first storage and I can expand volume group, logical volume, etc on it.

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CentOS 5 Server :: Centralized Storage For Windows And Clients?

May 26, 2011

I have setup openldap and samba for authenticating Windows and Linux clients on my server. They are working fine. Windows users are getting authenticated through server as Primary Domain Controller and Linux clients directly from Openldap directory. But I have little problem that is I want to mount home folders created on server to be available on clients so clients get a centralized storage with some quota on both Linux and Windows clients. Can you help me please how can I do that.

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Server :: Software For A CentOS Or RHEL X86_64 For Web Storage & Photos

Jan 27, 2010

I have been searching for a software package that will install on CentOS5.4 x86_64 or RHEL5.4 x86_64 that I can allow users to access via the Internet for online web storage, pictures and they can manage their space (quota would be enforced). I am not having much luck finding any software?

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Server :: Cluster Storage With The Rock Cluster Storage Operating System?

Jun 8, 2010

I am trying to do the cluster storage with the Rock Cluster storage operating system . I have install the rock cluster on the main server . and I want to connect the client with the PXE boot . when I starting the client then it boot from the PXE boot into the mode of compute node. but it ask the where is to be stored the I have give the path..then server says that not able to find the directory path.

1) insert-ethers
2) client is started with the PXE boot.
3) it detects the dhcp .
4) At last it demand where is to be started by cd-rom, harddisk ,nfs etc.

then I started with the nfs and I have given the lanIp of server.and server is detecting the client but client is not finding the filesystem directory. into export partition directory but it is not taking path.

/export/rock/install it is not finding this path then it is not able to start the o/s from PXE boot..Is there any solution and manual of rock or anyother solution then u can reply to me...

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Ubuntu :: Desktop Icons Creation And Panel Content Creation After Login Getting Slower

Nov 17, 2010

I've been running 10.04 since September on my new MSi i3 notebook and about two weeks ago I noticed that when I login after system boot, propagation of icons on my desktop and the content of my Panel have become slower and slower.If I logout and login again the propagations are not slow.

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CentOS 5 :: Conga Errors With Enabled Shared Storage Support In CentOS 5.3?

Jun 24, 2009

I try to set up a 5 nodes cluster and a shared Coraid Storage with conga but it fails with "Shared Storage Support" checked.The message is:'A problem occurred when installing packages: Packages of set "Clustered Storage" are not present in available repository' and it is shown under every node on the next sceen after I submit.The pc where conga runs is on the same subnet ( and it has the same /etc/hosts of the other nodes.In that pc runs a proxy too and the nodes go out through it (that pc has 2 NICs)Every node (2.6.18-128.1.14.el5-xen-x86_64) is patched whith the last yum update (this morning) the same is for the pc (2.6.18-128.1.14.el5).Every node has 4 NICs , 2 NICc towards the storage the others in bonding towards the WAN.Every node is exactly alike, they have been installed with the ks.cfg generated from the first node and they all have the support for Clustering, Virtualization, and Clustered Storage.

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General :: CentOS ISO Creation From OS Files?

May 9, 2011

I have CentOS 5.5 Operating System files copied from the DVD, it's not a ISO image. My Centos dvd is not working so, I would like to make bootable image and burn it on a DVD from the files and install CentOS on other machine. I have tried creating ISO image using mkisofs command but, it is not booting.

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CentOS 5 :: When To Skip Swap Partition Creation

May 10, 2009

Are there any general recommendations on skipping creation of swap partition on servers? If I am sure that server will be ok with it's RAM is there any benefit in skipping swap partition creation or making it the least size possible other than saving disk space?

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CentOS 5 :: Allowing TFTP File Creation?

Aug 4, 2010

Is there a trick to allowing a TFTP connection to create a file? I can successfully tftfp (from a cisco router) if I touch the file first, but otherwise, (/tftpboot has been chmoded to 777) I get [TFTP: error code 2 received - 20334]

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Hardware :: Searching For Clustered File System?

Feb 1, 2011

I'm looking for a way to have two hosts talk to the same volume without the need for backend host communication ie. clustered file systems? Does anyone know of a clustered file system that will allow this? The basic idea I have in my head would be turn off caching and utilize stubs or pointers to let each host know when to reread new data? The hosts will not be writing to the same files or directories at the same time. They will also be targetting certain information in certain locations on the volume.

I'm trying to join two enclaves to pass data without networking. One host will drop a file and write a stub saying the file is there. The second host will then pick up the file analyze it and then drop a report so that the first host can then pick the report up.

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Server :: Imapd Mailbox Subfolders Creation?

Mar 25, 2010

I started to use mailboxes instead of maildirs on my server. My server is with imapd on slackware.I found out that by Thunderbird I just cannot create sub-folders in my imap directory. My users used to manage their mails into hierarchically organized subfolders.

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Server :: MD RAID5 Hangs On Directory Creation

Mar 26, 2010

So here it is, I have a fileserver setup on Ubuntu Server 9.10 AMD64. In this system is 4 1.5TB SATAII drives. They are configured in RAID5 using MD. Now everything is working beautify, except when you need to create a directory. When you do, the system hangs for about 30 seconds. The I/O wait in top jumps up as well. Then the directory is created and everything works once again.

The odd part is it is only Directory creation that does this. I can copy, move, download and stream files off the server perfectly. I am baffeled as to what is causing it. It might be related to the fact that I expanded the array from 3 to 4 drives, it was after that, that I first noticed the problem.

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General :: Disable Only Usb-storage In Centos 5.5?

Dec 26, 2010

I'm using centos 5.5,my problem is that i need to disable usb-storage in my machine.But i need usb mouse and usb keyboard to function properly.I have tried all the below mentioned methods,

1.Appending blacklist-usbstorage to /etc/modprobe.d/bl*

2.removing the *.ko file,which removes the usb-storage drivers.

3.Added the line, install usb-storage /bin/true to /etc/modeprobe.conf

The first mentioned method works partially.That is the usb port in the front panel of the cpu is gets disabled.But,when i insert it at the port behind the CPU, usb-storage(pendirve) mounts automatically,which should not happen.

NOTE:usb-storage have to be disabled only for normal-users

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CentOS 5 :: How To Make 5 A Virtual SAN (storage)

Jan 5, 2010

i want to make my centos5 a virtual SAN (storage).

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Server :: Kickstart Customize Boot Menu Creation?

Aug 3, 2011

create the menu and submenu in isolinux.cfgWe do have a lot sites,ach sites using different Linux OS customization. So i need to create menu and submenu to select the appropriate OS image for the respective sites to do the installation through kickstart

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Server :: Make Two Storage Server Mirror Data In Real Time?

Jan 15, 2011

I have 2 servers each one with a RAID and I want them mirror they data so if one of them goes down the other one take the job with out disruption. I've heard of multipath by I want to know it in detail or learn of more options.

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Ubuntu Servers :: Mainboard And Storage System - How Both Storage Devices Will Be Supported By Debian

Mar 11, 2011

I'm interested in buying a new hardware for my company. The old server (now 10 years old) should be replaced with a new one. Till now, I was looking on different hardware suppliers, boards and different other places. I found a Tyan board [URL]. The hardware spec is quite interesting and the board would fullfill our claims.

how both storage devices will be supported by Ubuntu or Debian??

- SATA-Controller: AMD SP5100
- SAS-Controller: LSI 1068E

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CentOS 5 :: Migrate VM In A Non Shared Storage Environment?

Jun 15, 2010

I have a server running CentOS 5.5 with KVM capabilities. I need to migrate all the VMs to another server with the exact same hardware specs. The problem is it is running on individual harddisks, not shared storage. What is the best way to migrate to minimise downtime?

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CentOS 5 :: 5.5 Hangs When Copying Files To Storage

Sep 7, 2011

I built a centralized storage system a year ago (Aug. 2010) and for the past 10 months it has preformed flawlessly. About two months ago (July 2011) I began having problems writing to my centralized storage. The copies (cp -rpv) fail whether they are nfs or samba mounted disks to my centralized storage.

Attempting to copy either frame sequence (.dpx, .tiffs, .targas) or .MOV files now lock up my system and knock my storage offline.

The error that continues to echo back when this happens is :

I have not made any changes or updates to my storage configuration since building it last August 2010. I have reached out to Areca, and they found nothing wrong with the Raid Controller or my Raid settings.

I tried to troubleshoot all the basics - swapped out cables, replaced the WD storage disks, changed switches still the problem persists.

If anyone else has experienced this issue please let me know what you did to fix it. I can also post any error logs or message logs if that would be of assistance.

Below are the specs of my storage system

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Server :: Mounting A Storage Device Of Other Servers Using NFS On Another Server

Aug 2, 2011

Setup1: Two rack mounted servers with a common storage device serving as the home directories for users on the servers. The storage device is a gfs partition mounted on the servers as the home directory using SAS cables. These servers have RHEL 5.4 as the installed operating system.

Setup2: A standard tower server with Debian 6 as the operating system used for tape backups. This has a tape drive connected to it.

Question: How to mount the storage device of setup1 using NFS on the server in setup2.

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Server :: Creation Utilisateurs Pour Acces Distance Serveur Ftp Redhat?

May 20, 2010

voici mon probleme, j un serveur ftp sous redhat, comment faire pour creer les utilisateurs, (mais pas des utilisateurs locaux), c-a-d, les utilisateurs peuvent acceder au serveur ftp distant partir du client ftp (dans une autre machine), par mot de passe et identifiant.
merci de me donner la rponse si c possible dtaille.
merci beaucoup.

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CentOS 5 :: Implementing A Two-node Cluster With Shared Storage (GFS) And IP Address?

Jul 8, 2009

I am working on the beginning of implementing a two-node cluster with shared storage (GFS) and IP address. Both machines are virtual on VMware ESX 3.5, that should not make a difference, but that is the background.current status is that I have a single node cluster built with only the IP address configured within the cluster. The issue that I am having is that I have configured a service to contain only the IP address resource, however, when I go into cluster management that "service" does not register. As such, I cannot bring it online, ping it, etc. below is my cluster.conf configuration:

<?xml version="1.0"?>
<cluster alias="tmbackup" config_version="10" name="tmbackup">
<quorumd device="/dev/sdb1" interval="1" min_score="3" tko="10" votes="3">


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CentOS 5 Hardware :: Direct Attached SCSI Storage Not Showing Up In O/S

Oct 14, 2009

We just setup a HP DL380 with CentOS 5, and ran all of the latest updates.I am trying to attach a Compaq array (no model number) that is SCSI attached. I can see the array from the bios and created a raid group on it from there. However, from LVM and lvscan, I don't see it at all. I checked dmesg and there are no errors.Also, interestingly /proc/scsi/scsi is empty.

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CentOS 5 :: Change Virtual Machines Storage Directory In Centos5.5?

Oct 15, 2010

I installed centos 5.5 Ent as host and i installed vmware server 2.2. i need to Change the location of the 'Virtual Machines' directory(/var/lib/vmware/Virtual Machines) to a directory on /home(/home/Virtual Machines) where there is more disk space.Reinstalling centos and reinstalling Vmware server is not the option for me.

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