Networking :: Increase Storage Space Of Server With NAS/DAS Device Via Gigabit Ethernet?
Feb 8, 2010
Cost effective (the people want cheap) solution to increase server storage space with as little impact on throughput (what I want) as possible. I have a server that sends instructions to 20 clients to perform certain tasks. The clients send gigs of data back to the server for storage.
BACKGROUND INFORMATION
Network: Gigabit Ethernet
Clients: (20) HP, Solaris, Linux
Linux Server: Dell R805 PowerEdge (QUAD Core Athlons 16 gigs of ram, 4 gigabit ports.
Selected directories are mounted (NFS) by clients. One directory to be mounted by the clients contains executable files. Mount commands are sent from the server (rsh) to the clients. Yes I know (ssh) but this is how the software was originally written so let's go with it.
The clients then receive commands to execute the binaries contained within the mounted directory. The binaries basically create an image of the clients filesystem including special applications. The client then sends the files and directories to the server which stores this �image�. This process can be reversed to restore a client to the initial baseline image.
In a nut shell, 20 clients are sending gigs of data to the server for storage. I need to attach a NAS (gigabit) to extend the storage capability of the server. The server would mount (NFS) to the hard drives on the NAS. The NAS, configured as a �direct attached storage� device (DAS), means the storage device is connected directly to the server and not the network (which makes it a DAS). This would provide direct storage expansion for the server. However, this configuration cannot be a bottleneck that significantly hinders performance.
Clients <---data---->Server<----storage---->DAS/NAS
1) Will a low end NAS (gigabit port) work? (NetGear 1TB ReadyNAS Duo, RND2110-100NAS) or something with a higher rated throughput (QNAP TS-239 Pro II)
2) Low end won't work, go with �?
3) Does the processor on the NAS play any role that would determine the performance of this configuration given that the server would mount directly to a directory on this device (DAS/NAS)?
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Jan 20, 2011
cp: writing `/tmp/tmpX2KZDc/system.image': No space left on device However, when I right-click on properties, I see it has 51 items, totalling only 130.5 KB!this is a dual boot system with Win XP and Ubuntu 10.10 (~58Gb partition)Quote:
anil@anil-HP-EliteBook-8440p:/tmp$ mount
/dev/sda5 on / type ext4 (rw,errors=remount-ro,commit=0)
proc on /proc type proc (rw,noexec,nosuid,nodev)
[code]...
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Apr 1, 2010
We have a Linux box which acts a a file server. Currently, files and directories are exported using NFS.At the moment, we are a bit concern on its data transfer performance. FYI, we are using a embedded Gigabit Ethernet port on the file server. We ran a few simple write tests between NFS client (also utilizes GigE port) and the NFS server. In these tests, both NFS server and client are both connected directly to each other with a Cat5E cable. Unfortunately, the write/transfer speed results are not as per our expectation. It scores roughly about 11-12MByte/s, where as theoretically Gigabit Ethernet transfer rate is able to reach up to approximately 120MByte/s.I wouldn't expect to reach the theoretical max transfer rate (it would be great if we can , but I would appreciate if you guys can share with us in terms of the following :
1) What's the practical max data transfer rate which you guys managed to observe in a normal Gigabit based connection? What about jumbo frames configuration?
2) Is there any additional tuning/configuration we need to do within the OS to reach those practical max data transfer rate figure?
3) Does PCI-e / system bus plays a role in achieving this speed? For example, we are using the embedded GigE port and we heard some people says embedded ports are actually sharing the system bus and resources with other devices, which might adds into performance issue. Correct me if I'm wrong.
4) Does converting to Cat6 cabling will guarantee an increase in the data transfer performance?
5) In the future (once we are clear on how much single GigE transfer rate we can go) , we are looking into doing bonding since that the NFS server's shared directory/volume read-write speed is way much higher (i.e 400-600MByte/s). Will bonding allow us to achieve higher NFS read/write speed? What are the bonding modes best used for this purposes? Appreciate if anybody who has experience in doing bonding for NFS can share their experience.
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Apr 20, 2010
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Jun 8, 2010
With what command i can check whether my Ethernet card supports gigabit speed Ethernet or not?
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Sep 26, 2010
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Apr 21, 2011
I have an ASUS P5Q PRO motherboard with an integrated Atheros AR8121/AR8113 PCI-E Gigabit Ethernet Adapter.I installed Ubuntu 10.04 "Lucid" 64bit Kernel version 2.6.32.21 I have read that the driver isn't in the kernel, but there's a strange thing :
First if I try to run lspci from command line it doesn't reports Atheros Ethernet Controller.
Second If I try to run lshw -C network from command line it doesn't reports Atheros Ethernet Controller.
Third if I run ifconfig it only returns my loopback address.
Can I suppose that my Ethernet Intel Gigabit Controller is broken or that Atheros driver is missing?
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Sep 20, 2010
from [URL]
i did the following
[root@localhost ~]# lspci | grep Wireless
0c:00.0 Network controller: Intel Corporation Wireless WiFi Link 5100
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Mar 25, 2010
I'm building an Ubuntu 9.10 home server to essentially backup all my PCs to, serve media, and store other large data (I record music and film). Here's what I have as far as storage goes:
4GB CompactFlash: for OS
2x 500GB WD drives: intended for RAID-1 for backup (which I will in turn back to external drive on a weekly basis)
3x TB Hitachi drives: intended for RAID-5 for media and storage
Both RAIDs will be software-driven. Now, a few questions:
From what I've read, I can benefit from using LVM on top of the RAID. Is this true, and besides the complexity and potential difficulties in recovery in case of disaster, is there a downside to LVM?
Would I benefit at all from using smaller logical volumes on the RAID-5, or should I just make one at the full size of the drive?
Also from what I've read, it seems that XFS may be the best filesystem to use, from a stability and performance standpoint. Should I go that route, then? I suppose that if it IS beneficial to have multiple smaller logical volumes, then there may come a point that I need to shrink and grow these logical volumes, and if that's the case, it appears XFS is out of the question. What's the runner-up; Reiser? I currently have /swap and /home partitions on the CF card. I'd at the very least like to remove the /swap partition and just create a swap file on the RAID-5. Should I move my /home partition to the RAID-5 as well?
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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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Feb 26, 2010
Greetings Fellow Knights Of The Penguin Clan....!I am having issues with device mapper seeing a 275GB Raid5 Lun from my SAN storage.I'm using IBM 2145 San Volume Controller.I am able to see a 40 GB Raid 10 device though..
########################################################################
fdisk -l |grep 'dm-*'
Disk /dev/dm-6: 42.9 GB, 42949672960 bytes
[code]....
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Jun 15, 2011
we have purchased the Dell PowerVault NF 500 NAS Storage Box with Window Storage server 2003 is Installed.we have LDAP server for authentication the user in network for accessing network resources.All ubuntu users on client side use ubuntu(LDAP server )for user authentication.when a user logon on client side machine his home directory is created on client machine .
but we want to use the NAS storage device to store the home directories of user.we want to implement that ,whenever a user logon his home directory is created on powerValut NF 500 storage device so that all user data is stored centrally for taking the backup .we want to mount NAS storage device so that user uses when they login and create user profile.
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Mar 3, 2010
I installed ubuntu server 9.10. During the install the onboard 10/100 land card was automatically installed and was used for updating packages. I just put in a DGE-530T gigabit ethernet card. I can see it recognized under lspci.01:07.0 Ethernet controller: D-Link System Inc DGE-530T Gigabit Ethernet Adapter (rev 11) (rev 11). It does not show up under ifconfig. The CD came with linux drivers. The readme talked about recompiling the kernel and a whole bunch of other stuff. Google was equally confusing. What do I do?
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May 29, 2011
I just upgraded to 15 and was wondering if it was possible to specify which devices to prioritize a route through. I have my machine, a laptop, connected to my family's router for an internet connection and a wired connection to a personal router for a faster and private connection between my other two computers and a network storage device. Whenever the laptop is connected to my personal router everything goes through it and it can't connect to any external web sites. But when I unplug it and go only on my family's wireless everything is fine, except I can't connect to the storage device since it has no external connections.
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Sep 12, 2015
My laptop only has a 100Mbit ethernet port, so I bought two external USB gigabit ethernet dongles in the hope of getting faster ethernet speeds. I have never had trouble with Linux supporting ethernet before, but neither of these devices are working. One is an ASIX AX88179 (by TrendNet) and the other is a Realtek RT8153 (by Anker). When I plug these devices in, I get network devices called enx00e04ca82300 or enxd8eb97b61e4d (instead of eth0/eth1 as I would expect).
I can manually set an IP address with "ifconfig enx00e04ca82300 x.x.x.x up" and manually add a route and my network connection works at gigabit speeds. However, the long enx... network device name does not appear to be valid in some sense: tools like dhclient or iptraf or network-manager fail with messages like "no such device" (well, network-manager just hangs). I don't know if it's because the name is so long or because they are not fully registered inside the kernel.
I have vmware workstation installed, and it does some strange things with network devices (setting up bridges for everything). I have disabled its services and see the same behaviour. This looks like a kernel bug to me but it's possible it is a vmware issue. vmware works fine with my wireless and 100Mbit ethernet (eth0 and wlan0).
Realtek device
Some dmesg for the Realtek device:
Code: Select all[10264.619420] usb 4-3.1.1: reset SuperSpeed USB device number 4 using xhci_hcd
[10264.634651] xhci_hcd 0000:00:14.0: xHCI xhci_drop_endpoint called with disabled ep ffff8800c4221a00
[10264.634653] xhci_hcd 0000:00:14.0: xHCI xhci_drop_endpoint called with disabled ep ffff8800c4221a48
[10264.634655] xhci_hcd 0000:00:14.0: xHCI xhci_drop_endpoint called with disabled ep ffff8800c4221a90
[10264.647842] r8152 4-3.1.1:1.0 eth0: v1.06.0 (2014/03/03)
[10264.647902] usbcore: registered new interface driver r8152
[10271.452198] IPv6: ADDRCONF(NETDEV_UP): enx00e04ca82300: link is not ready
[10275.094334] IPv6: ADDRCONF(NETDEV_CHANGE): enx00e04ca82300: link becomes ready
The Realtek device often crashes after just a few gigabytes have been transferred, with dmesg like this:
Code: Select all[10485.761603] net_ratelimit: 10 callbacks suppressed
[10485.761618] r8152 4-3.1.1:1.0 enx00e04ca82300: Tx status -71
[10488.694340] r8152 4-3.1.1:1.0 enx00e04ca82300: Tx status -71
[10488.711352] r8152 4-3.1.1:1.0 enx00e04ca82300: Tx status -71
[code]...
I have not investigated the ASIX device as much. However, my original 100Mbit ethernet has an ASIX chipset (AX88772) and that works perfectly. I have not observed the ASIX device crashing yet so I am using that for now (haven't used it for long yet though). But as before the device name appears to be invalid and I cannot run tools like dhclient. why two gigabit adapters with completely different chipsets would show up with long device names and support low-level stuff like ARP, ping, and static IPs, but fail with dhclient & network-manager? And the Realtek device seems to like crashing too.
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Feb 14, 2011
I'm having issues with Ubuntu 8.04 to see my Intel 82574L ethernet card. Ubuntu is not detecting it at all.
I downloaded the drivers from
[URL]
copied it to the server, untarred, make install ,and now i'm getting notifications that kernel-devel is not installed. I installed linux-headers from the install cd ( ihave the alternate and server one), but i cannot find any kernel-devel or linux-kernel-devel. The driver still does not want to build after installing linux-headers.
I need to use Ubuntu 8.04 due to some specific requirements, do i need the network cards to work.
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Aug 12, 2010
I have spent them with Fedora and liked it a lot. Today I decided to install CentOS as this looks like something I would like to be using in the future. However a problem I could not solve came right at me after the first boot.
I have one eth0 device which is onboard lan and that was correctly recognised and activated. The second device is F5D5055 Belking USB Gigabit ethernet adapter. There was no problem with it whatsoever under Fedora. According to all the info it should be automatically recognised on kernel 2.6.14 and later. However when I plug it into the USB port, I can see its correct name in the device manager but it is not recognised as a network device. I have configured my Fedora as a firewall/router for my lan and definitely want to use that interface.
Hopefully without needing to do anything in the realm of compiling kernel, cause that is where my half a day long attempt to fix the problem left me.
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Feb 1, 2011
I use CentOS for the servers I am responsible for. This time, I inherited a piece of hardware that CentOS refused to boot up on, so I installed Fedora Core 14. I have NIS and autofs working -- mostly.The home directories reside on an EMC network storage device. The problem is that when I login as a regular user, all the files under the home directory are owned by nobody/nobody, instead of user/group. I believe this has something to do with NFSv3 vs. v4, but I have yet to find the right trick to fix it.
[Code]...
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Aug 5, 2011
I'just installed ubuntu 10.04 LTS on my new laptop(ACER aspire 5750). Ubuntu installed perfectly. Every things working ok but, it can't able to detect my CABLE MODEM.
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Nov 8, 2010
Just a heads up to others. There is a kernel regression in the 2.6.35 kernel with regard to, some but not all Intel Gigabit ethernet adapters using the e1000e driver. After an otherwise successful upgrade from fedora 13 to 14, no ethernet connection could be made while using the upgraded 2.6.35 kernel that comes with fedora 14. The 2.6.34 fedora 13 kernels work fine and were fortunately still available after the upgrade.
I have personally seen the identical malfunction on all 2.6.35 kernels I've tried with both Arch and Aptosid and have seen similar reported problems on the Gentoo forum. In each case, going back to a 2.6.34 or upgrading to a 2.6.36 kernel solved the problem so this is almost certainly a kernel issue. My onboard Intel Gigabit ethernet adapter is:
$ lspci -vv | grep Ethernet
00:19.0 Ethernet controller: Intel Corporation 82566DC Gigabit Network Connection (rev 02)
I believe the intel ICH8 chipset motherboards are the ones primarily effected.
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May 12, 2010
I have a dual boot system (Suse 10.0 and Windows XP Pro) in my notebook. My notebook is toshiba m358, which has a Marvell Yukon Gigabit Ethernet Network Card (Marvell 88E8072) on it. My problem is this: in Windows XP Pro, the network card works well, but in openSUSE, the light on the network card does not turn on. I believe that there is no driver for the network card. I have tried several ways to solve this problem:
1. Download Marvell 88E8072's driver from "[URL]", whose name is "install_v10.85.3.3.tar.bz2", and then install it with following commands:
Code:
# tar xfvj install_v10.85.3.3.tar.bz2
# cd DriverInstall
# ./install.sh .....
Code:
# modprobe sk98lin
# WARNING: Deprecated config file /etc/modprobe.conf, all config files belong into /etc/modprobe.d/.
After I reboot the openSUSE, the light of network card is still off.
2. Follow "[URL]" to configure the Marvell 88E8072. It also does not work.
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Jul 20, 2010
Actually, the title I was looking for was Belkin Gigabit Ethernet ExpressCard not seen on Dell Precision M6500 with CentOS 5.5 _when system boots with no link on this card_. When I boot this system with a cable connected to the Ethernet port, the card shows up (dmesg, lspci 0e:00.0 and ifconfig). When I boot it with nothing connected, it's like it doesn't exist. I know I could make it work with a loopback plugged in at all times, but am looking for a more graceful solution. Here are messages logs from when it's recognized
Jul 19 15:14:23 mss kernel: sky2 driver version 1.22
Jul 19 15:14:23 mss kernel: sky2 0000:0e:00.0: v1.22 addr 0xf6afc000 irq 193 Yukon-2 EC rev 2
Jul 19 15:14:23 mss kernel: sky2 eth0: addr 00:00:5a:11:45:5b
[code]...
Update: Should have been a little clearer - this card has the Marvell Yukon chipset. I'm trying to identify the part number without ripping out the casing.
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Jul 9, 2010
I just installed 10.04 on a Dell C800 and I've been trying to connect to the internet via Ethernet with no avail. I did some searching and ran lspci -nn and got this:
user@user-desktop:~$ lspci -nn
00:00.0 Host bridge [0600]: Intel Corporation 82815 815 Chipset Host Bridge and Memory Controller Hub [8086:1130] (rev 02)
[code]....
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Feb 11, 2010
I am looking for a gigabit network card for my centos 5.4 server. I am looking for something known to work well with linux. I have been on the bestbuy site and I found a DLink (DGE-530T) card with support for linux from the vendor but after reading feedback from users with that card I am not so sure it is linux friendly. I am now thinking of buying online.
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Jan 7, 2010
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Code:
UDEV [1262910483.475886] add /class/video4linux/video0 (video4linux)
lsusb tells:
[code]...
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Oct 2, 2010
I have a usb 4G dongle which has stated no linux support in australia from vividwireless.
The flip flop part does not exist for me in the sense I can not see the cd autorun files so I downloaded the files off the net and put them in my wine directory
I attempted to run the exe file thru wine but whether I try graphical or command line....it defaults to a graphical dialog box....I click on English...installer then shows the dialog box for the welcome screen ...then I click on next and the screen shows for a nanosecond the user agreement but exits with no log etc.
2) so in linux here is the info
Code:
Bus 001 Device 020: ID 12d1:380b Huawei Technologies Co., Ltd. but when I press lsusb again....that info disappears....hmmm
ok so
Code:
Oct 3 06:42:35 sid rsyslogd: [origin software="rsyslogd" swVersion="4.6.4" x-pid="1435" x-info="http://www.rsyslog.com"] rsyslogd was HUPed, type 'lightweight'.
Oct 3 07:00:15 sid kernel: usb 1-8: new high speed USB device using ehci_hcd and address 3
[Code]....
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May 20, 2010
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Nov 27, 2010
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[Code].....
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Jun 17, 2010
I just installed 10.04 on my new netbook and I am suprised to see that the ethernet is not recognized. When I run
Code:
ifconfig eth0
the result is
Code:
no such device
The machine was working fine before I installed Ubuntu. I am suprised to see this problem as I have already installed it on a few machines without any problem such as this.
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Nov 12, 2010
I have a device (not a pc) connected to my pc via ethernet, it dose not show up in networks, I was hoping there was a way of scanning to detect for it, is there a way of seeing content of it is basically what I'm asking?
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