similar to: UDP buffer overflows?

I have four NFS servers running on Dell hardware (PE2900) under CentOS 5.7, x86_64. The number of NFS clients is about 170. A few days ago, one of the four, with no apparent changes, stopped responding to NFS requests for two minutes every half an hour (approx). Let's call this "the hang". It has been doing this for four days now. There are no log messages of any kind pertaining

Hi, We are running on 5.5 on a HP ProLiant DL360 G6. Kernel version is 2.6.18-194.17.1.el5 (we had also tested with the latest available kernel kernel-2.6.18-238.1.1.el5.x86_64) We running some performance tests using the "iperf" utility. We are seeing very bad and inconsistent performance on the UDP testing. The maximum we could get, was 440 Mbits/sec, and it varies from 250 to 440

Configuration: (2) Dual Core Opterons 8GB RAM Apache used to balance 40 mongrel instances We receive Application 500 Errors. Nothing suspect appears in the log, so we are at a lost as to what to do next. Any advice would be welcome and/or an explanation of what types of things cause Application 500 Errors in mongrel. Thanks! - Jared Brown -------------- next part -------------- An HTML

Hi *Problem *- I'm running Icecast in a VM container on OpenVZ. Syslog on the hardware node (HN) shows these error messages: Jan 23 18:43:05 HN kernel: [27469893.430615] possible SYN flooding on port 8000. Sending cookies. Jan 23 21:37:40 HN kernel: [27480362.817944] possible SYN flooding on port 8000. Sending cookies. Jan 23 23:43:50 HN kernel: [27487929.582025] possible SYN flooding on

I have a beefy machine (Intel dual-quad core, 16GB memory 2 x GigE) I have loaded RHEL5.1-xen on the hardware and have created two logical systems: 4 cpus, 7.5 GB memory 1 x Gige Following RHEL guidelines, I have it set up so that eth0->xenbr0 and eth1->xenbr1 Each of the two RHEL5.1 guests uses one of the interfaces and this is verified at the switch by seeing the unique MAC addresses.

i am assigned a network to replace its "Windows server with ISA caching proxy" with another "debian linux with squid proxy" with both "linux" and "ISA" are completely differnet boxes. i am using linux 2.6 kernel since the linux server has SATA hard disks . the network has downlink with a penta@net DVB card for down-link ; then it''s connected

Am 07.01.2016 um 11:58 schrieb Sébastien Le Ray: > Hi list (and happy new year), > > I'm experiencing some troubles using Samba (4.1.17 debian version) over > VPN. Basically we've following setup : > > PC === LAN ===> VPN (WAN) ==== LAN ===> Samba file Server > > Copying big (say > 1MiB) files from PC to Samba file server almost > always ends up with a

Le 07/01/2016 12:22, Reindl Harald a écrit : > > /usr/sbin/ifconfig eth0 txqueuelen 100 > ______________________________________________ > > ifcfg-eth0: > > ETHTOOL_OPTS="-K ${DEVICE} tso on lro off; -G ${DEVICE} rx 128 tx 128" > ______________________________________________ > > sysctl.conf: > > net.core.rmem_max = 65536 > net.core.wmem_max = 65536

I'm using Samba & smbfs to make directories on a Linux file server available across a switched Gigabit network. Unfortunately, when mounting the shares to another Linux system with smbfs, the performance is terrible. To test the setup, I created both a 100mb and 650mb file and transferred them with ftp, smbclient, and smbfs (mounted share). I also used iperf to send each file, just out of

Hi all, I order to reach maximum performance on my centos kvm hosts I have use these params: - On /etc/grub.conf: kernel /vmlinuz-2.6.18-164.11.1.el5 ro root=LABEL=/ elevator=deadline quiet - On sysctl.conf # Special network params net.core.rmem_default = 8388608 net.core.wmem_default = 8388608 net.core.rmem_max = 16777216 net.core.wmem_max = 16777216

Currently I'm running CentOS 4.4 on a Dell Poweredge 850 with an Intel Pro/1000 Quad-port adapter. I seem to be able to only achieve 80% utilization on the adapter, while on the same box running Fedora Core 5 I was able to reach 99% utilization. I am using iSCSI Enterprise Target as my application and I am using the nullio feature, it just discards any write and sends back random data for

Hi, I have a problem with file transfers between a windows systems and unix systems. I have one win32 desktop (intel e6400 2Gb Ram), one win32 laptop (p-m 2Ghz). Also one linux laptop (p-m 1.4GHz) and one opensolaris desktop (intel e4400 1GB Ram). The two laptops have built-in 100Mbit ethernet and desktops have 1Gbit ethernet on the motherboard. Both desktops use a Marvell Yukon. The file

I am trying to create a para-virtualized guest with the same kernel image and initrd image as dom0. The configuration is below ================================================================================ kernel = "/boot/vmlinuz-2.6.21.7-3.fc8xen" ramdisk = "/boot/initrd-2.6.21.7-3.fc8xen.img" memory = 428 name = "fedora.fc8" vif = [ '''' ] dhcp =

hi, im using xen on fedora core 8 as dom0, and i downloaded the fc8 image from jailtime.org, when i use "xm create /xen/fedora/fedora.fc8.xen3.cfg -c" i get the following on my terminal: Using config file "/xen/fedora/fedora.fc8.xen3.cfg". Started domain fedora.fc8 Linux version 2.6.21-2950.fc8xen ( kojibuilder@xenbuilder2.fedora.redhat.com) (gcc

Greetings all- I have a CentOS 5 (Final) system that is serving up content to several other hosts via NFS. The amount of data transferred is rather small as most of the files are under 100kb and each export has maybe 100 files that are accessed regularly. I'm finding that as I add more hosts accessing the NFS server, the performance seems to be getting poorer. There are obvious delays when

Hello all, I'm currently experiencing an issue with an NFS server I've built (a Dell R710 with a Dell PERC H800/LSI 2108 and four external disk trays). It's a backup target for Solaris 10, CentOS 5.5 and CentOS 6.2 servers that mount it's data volume via NFS. It has two 10gig NICs set up in a layer2+3 bond for one network, and two more 10gig NICs set up in the same way in another

Hi All, Our test users re-download the mail they've left on the server when they switch from Qpopper to Dovecot. Qpopper includes the X-UIDL header - X-UIDL: X8V"!E)<"!58?"!"9C"! - on read messages. Any suggestions are appreciated. I've included my dovecot configuration. Thank you, Tristan --- Tristan Tristan Goguen CEO, ILAP? T: 416-250-5600 ext. 205 F:

https://bugzilla.netfilter.org/cgi-bin/bugzilla/show_bug.cgi?id=40 laforge@netfilter.org changed: What |Removed |Added ---------------------------------------------------------------------------- Status|NEW |ASSIGNED ------- Additional Comments From laforge@netfilter.org 2003-02-03 16:49 ------- We haven't seen this

Hi, we' ve got some probs regarding the smbclient.. it's odd, coz all seems te be working ok, except the smbclients. we use samba 3.2.4, here is a debug level 10 nmblook up is working, also it's a pdc and seems to function normal ?! i did add wins with the nsswitch, and can ping the host. anny idea where to look for ?!?! Cheers, Collen [root@green var]# echo "huh" |

Hi, Saw the below config from tinc’s manual: UDPRcvBuf = bytes (OS default) Sets the socket receive buffer size for the UDP socket, in bytes. If unset, the default buffer size will be used by the operating system. UDPSndBuf = bytes (OS default) Sets the socket send buffer size for the UDP socket, in bytes. If unset, the default buffer size