similar to: NFS performance on CentOS 7

Hi -- I'm trying to build an application on CentOS 7 which can run on older versions of CentOS. I'm running into problems with versioning of memcpy in Glibc. Executables built on CentOS 7 require memcpy from glibc-2.14, which causes the program not to load on systems with older versions of glibc. My online search suggests to add an asm() with a .symver option to select memcpy from

Hi -- I'm running a server which is usually stable, but every once in a while it hangs. The server is used as a file store using NFS and to run VMware machines. I don't see anything in /var/log/messages or elsewhere to indicate any problem or offer any clue why the system was hung. Any suggestions where I might look for a clue? -- Michael Eager eager at eagercon.com 1960 Park Blvd.,

Hi -- My CentOS 5.8 server crashed, leaving no clue why. The last entry in /var/log/messages is a dhcpd notice around 4:00am, followed by the restart message when I rebooted. The only clue that I have is that the fan was running full speed when I restarted it. The fan slowed to normal speed. Any ideas what I can do to find out the cause? -- Michael Eager eager at eagercon.com 1960 Park

On 11/23/2015 08:06 AM, Nicolas Thierry-Mieg wrote: > On 11/23/2015 04:33 PM, Michael Eager wrote: >> Hi -- >> >> I'm trying to build an application on CentOS 7 which >> can run on older versions of CentOS. I'm running into >> problems with versioning of memcpy in Glibc. Executables >> built on CentOS 7 require memcpy from glibc-2.14, which >>

On 11/23/2015 09:10 AM, Nicolas Thierry-Mieg wrote: > On 11/23/2015 06:00 PM, Michael Eager wrote: >> On 11/23/2015 08:06 AM, Nicolas Thierry-Mieg wrote: >>> On 11/23/2015 04:33 PM, Michael Eager wrote: >>>> Hi -- >>>> >>>> I'm trying to build an application on CentOS 7 which >>>> can run on older versions of CentOS. I'm

I'm having a problem installing CentOS 8 from a USB drive. When the installer boots from the USB, it displays the language selection screen. After I select English and continue, the installer freezes. The USB drive flashes a couple times over the next minute or so, the stops. The mouse moves the cursor, but the installer is unresponsive to either selecting QUIT or HELP. I've

---------- Forwarded message ---------- From: "Michael Eager" <eager at eagerm.com> Date: Feb 18, 2014 7:58 AM Subject: Deadline for DWARF Version 5 comments -- March 31, 2014 To: "gdb at sourceware.org" <gdb at sourceware.org>, "GCC" <gcc at gcc.gnu.org>, < lldb-dev at cs.uiuc.edu> Cc: The DWARF Debugging Information Format Committee

Hi -- I have a server running CentOS 5.8. It has a 6-core AMD processor, 16Gb memory, and a RAID 5 file system. It serves as both a file server and to run several VMware virtual machines. The guest machines run Windows 7 and various versions of Linux. The system is running the latest version of VMware Workstation. Until recently, I started VMs using the VMware Workstation GUI. The system has

Hi I'm trying to setup a 3 node gluster, and am hitting huge performance bottlenecks. The 3 servers are connected over 10GB and glusterfs is set to create a 3 node replica. With a single VM performance was poor, but I could have lived with it. I tried to stress it by putting copies of a bunch of VMs on the servers and seeing what happened with parallel nodes.. network load never broke

Hi, So is the KVM or Vmware as the host(s)? I basically have the same setup ie 3 x 1TB "raid1" nodes and VMs, but 1gb networking. I do notice with vmware using NFS disk was pretty slow (40% of a single disk) but this was over 1gb networking which was clearly saturating. Hence I am moving to KVM to use glusterfs hoping for better performance and bonding, it will be interesting to see

I have a Dell server with four bonded, gigabit interfaces. Bonding mode is 802.3ad, xmit_hash_policy=layer3+4. When testing this setup with iperf, I never get more than a total of about 3Gbps throughput. Is there anything to tweak to get better throughput? Or am I running into other limits (e.g. was reading about tcp retransmit limits for mode 0). The iperf test was run with iperf -s on the

Hi, I'm looking for a good way to create a constant data stream that will occupy a bandwidth of about 2--5Mbit/sec between two remote hosts over the internet. I have full access to the hosts involved. My first attempt to use scp to copy data from /dev/null on host A to /dev/null on host B, but scp says '/dev/null: not a regular file'. If something like that would work, I would

On 12-03-2015 17:39, Digimer wrote: > -----BEGIN PGP SIGNED MESSAGE----- > Hash: SHA1 > > On 12/03/15 04:29 PM, Gilbert Sebenste wrote: >> Hello everyone, >> >> A network engineer buddy of mine brought up for discussion with me >> that he'd like to do some throughput testing, but he's new to >> Linux/RedHat. Is there any software I can recommend to

I set up a domU as a backup server, but it has very, very poor network performance with external computers. I ran some tests with iperf and found some very weird results. Using iperf, I get these approximate numbers (the left column is the iperf client and the right column is the iperf server): domU --> domU 1.77 Gbits/sec (using 127.0.0.1) domU --> domU 1.85 Gbits/sec (using domU

I set up a domU as a backup server, but it has very, very poor network performance with external computers. I ran some tests with iperf and found some very weird results. Using iperf, I get these approximate numbers (the left column is the iperf client and the right column is the iperf server): domU --> domU 1.77 Gbits/sec (using 127.0.0.1) domU --> domU 1.85 Gbits/sec (using domU

Is there any piece of software that I can use to run between a client and a linux or windows server with a smb/cifs share that will test network speed, latency, sustained read/writes, multiple file create, read, write, close, etc.. etc.. over X period time? I'm testing a Centos server with samba and Windows 2k3/8 servers on the other end of a T1 connection and while I know the T1 bandwidth

When starting IPERF with "iperf -s" or "iperf -sD" it seems to stop after client runs its first test. I would like to leave it running for a few hours to give someone a chance to run a few tests. Is there a way to leave it active on the server and kill it manually later?

On Mon, Nov 17, 2014 at 12:38:16PM +0200, Michael S. Tsirkin wrote: > On Mon, Nov 17, 2014 at 09:44:23AM +0200, Gleb Natapov wrote: > > On Sun, Nov 16, 2014 at 08:56:04PM +0200, Michael S. Tsirkin wrote: > > > On Sun, Nov 16, 2014 at 06:18:18PM +0200, Gleb Natapov wrote: > > > > Hi Michael, > > > > > > > > I am playing with vhost multiqueue

On Mon, Nov 17, 2014 at 12:38:16PM +0200, Michael S. Tsirkin wrote: > On Mon, Nov 17, 2014 at 09:44:23AM +0200, Gleb Natapov wrote: > > On Sun, Nov 16, 2014 at 08:56:04PM +0200, Michael S. Tsirkin wrote: > > > On Sun, Nov 16, 2014 at 06:18:18PM +0200, Gleb Natapov wrote: > > > > Hi Michael, > > > > > > > > I am playing with vhost multiqueue

Hi All, I am sure this has been answered somewhere in the list in the past, but I can''t find it. I was wondering if the linux guest netfront driver has GRO support in it. tcpdump shows packets coming in with 1500 bytes, although the eth0 in dom0 and the vif corresponding to the linux guest in dom0 is showing that they receive large packet: In dom0: eth0 Link encap:Ethernet HWaddr