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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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 them.is 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:
Code:
[root@node1 ~]# yum groupinstall "Clustering"
[root@node1 ~]# yum groupinstall "Cluster Storage"
[root@node1 ~]# chkconfig ricci on
[code].....
...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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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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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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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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Sep 13, 2010
I have a couple of servers which runs CentOS 5.5 and CentOS 5.4. We have decided to buy a UPS and we choose Eaton EX RT 11 plus eaton network management card minislot. I have read on the site of Eaton that they have two applications which could gracefully shutdown my servers - LanSafe and NetWatch. My experience with UPS and those applications is zero so I`m here for some advises? Do you prefer NetWatch over LanSafe?
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May 31, 2011
I have updated bind using yum on a Centos 5.3 server, after restarting, I have this error now.
Error in named configuration:
zone localhost/IN: loaded serial 42
/var/named/mydomain.hosts:20: unknown RR type 'SPF'
My version of is : bind.x86_64 30:9.3.6-16.P1.el5
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Jun 22, 2010
I have a server hacked when i try to log in i type root but won't let me type a passwdthere are no services up, can't see page mail nothing
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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.
Steps:-
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.
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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Nov 27, 2010
There is a command that you can type into the terminal that would "burn" an iso image to a storage device (usb). In ubuntu, this command would be <dd if=(path leading to iso) of=(device to be "burned" to)> Is this the same in Fedora, or is it a different command?
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Feb 22, 2010
I have a drive that I am going to use for media storage, but i am not sure which filesystem type to choose. It was originally ext2 since it had Fedora on it once before, but I want something that is accessible (ie read/write) from a Windows system. I think as long as I share the mount via Samba or something I should not need to worry about the type of system it is.Before thinking, I chose fat32 until I remember the limitations. Since this drive will be mounted by Fedora, I believe I should stick with ext*, but I'm not sure which to choose.
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Feb 26, 2011
I have a "Storage" partition in my hard drive which I have labeled as such and added to fstab. This is my fstab file:
[Code]...
The problem is that when I open up nautilus and click the Computer icon in the toolbar (which gives the fake computer:/// address) I see two items referring to my Storage partition:
* Storage (which appears to be of "unknown type" in the properties).
* 500 GB Hard Disk: Storage (which is the one that works).
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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 (192.168.xxx.xxx) 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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Feb 16, 2010
I was extraction some file through command line then I encounter on notification from winrar. This file exist what u want to do
replace
never
quite
I don't want that winrar will prompt me to choose action. Everytime whenever this situation occur it will overwrite / skip that file
Syntax I am using for unrar
rar e -pmypassword filename
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Dec 5, 2010
I recently purchased the HP w2338h LCD monitor; I previously used HP w1907, which worked perfectly. My graphics card is NVIDIA Quadro NVS 290.
01:00.0 "VGA compatible controller" "nVidia Corporation" "G86 [Quadro NVS 290]" -ra1 "nVidia Corporation" "Unknown device 0492"
01:00.0 0300: 10de:042f (rev a1)
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Feb 27, 2011
I've just made the switch from Ubuntu to Debian Squeeze and am having trouble connecting external media (be it a USB stick or an ext HD). The error I am getting when I connect anything via usb is the following:
Error mounting: mount exited with exit code 1: helper failed with: mount: wrong fs type, bad option, bad superblock on /dev/sdc1, missing codepage or helper program, or other error.
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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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Jan 5, 2010
i want to make my centos5 a virtual SAN (storage).
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Jul 9, 2010
I have desktop workstastation with the following parameters:
HP Workstation xw series 64bit
2xXeon 3.2GHz
2Gb ram
73Gb hdd
I want to use it as server to host my personal page and to learn to manage server, apache and etc. I doubt which distro to use. I used slackware 13 before on my laptop as desktop OS. Also I heard that CentOS is easy to update and manage. Which distro is good for that?
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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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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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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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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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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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Sep 10, 2010
XEN-server will be with 2 virtual OS:
dom1 - opensuse11.3 (x86) as LTSP server+squid+postfix+OpenOffice+FF
dom2 - opensuse11.3(x86) as WINE server for running windows application
Which type I/O prefer? Server for XEN use x64 or X86? about WS (without HD. will be use LTSP)?
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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">
[code]....
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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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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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Jul 13, 2011
My goal is to connect up a bunch of CentOS 5.6 servers to storage array which is running as an SRP target. These servers will be running eventually as Xen hypervisors. I'm using Mellanox Infiniband cards and a Qlogic Infiniband switch.
OFED drivers are already installed as standard. I have done the following.
1. Base install of CentOS 5.6 X86_64
2. Installed the following packages...
openib
ibutils
srptools
infiniband-diags
opensm
[Code]...
It works perfectly and connects to the target immediately with great results. I'd just like this to happen correctly on startup.
To work around the issue I have added the line srp_daemon -e -o into the init script for opensm /etc/init.d/opensmd but it doesnt always start the srp_daemon process. Its rather hit and miss
I'd really like srp_daemon to run as a service with a proper init script but I wouldnt know how to write one. I understand that this issue has been addressed in the RHEL6 srptools package but that doesnt help me because the software I intend to use on these servers specifically requires 5.
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Jan 22, 2011
i decided to build a home server on an AMD64 (buyed some years ago) for file storage, printer sharing and something else... I've searched a lot for "the best distros for server" and discarding extreme solution (like command line only) what remains is: Ubuntu, Fedora and Debian
Now the problem: how to install more than one distros on the same hdd? what i know is that i need a bootloader (grub/lilo) and partitions for boot,swap, and remaining space will be split for the distro itself.
I think is a good idea to have a partition only for files (/data) that all distros can access, but for sure i'd like to have one /root and one /home partitions each distro!
I can't understand if the correct way is first of all to install a distro (let's say ubuntu), then set up everything such as partitions and bootloader and then install other distros. I'd like to know if it is possible to manage dinamycally the space reserved for distros, so i'll be able to install 2,3,4,5...distros with no problems.
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