How To: Network / TCP / UDP Tuning This is a very basic step by step description of how to improve the performance networking (TCP & UDP) on Linux 2.4+ for high-bandwidth applications. These settings are especially important for GigE links. Jump to Quick Step or All The Steps. Assumptions This howto assumes that the […]
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Remember not to install the kvm kernel modules, otherwise you will get the error : failed to initialize monitor device when start a vm under VMware Server 2.0. BTW, you also need to follow instructions in this page to make VMware Server 2.0 work properly under CentOS 5.5. As a result, it seems that I […] Use the VMware host update utility to upgrade the host failed. From instructions from internet, try to upload the unpacked upgrade.zip to the local datastore of the server and run : esxupdate update -m metadata.zip. The upgrade completed without problem on my two ESXI 4 server (One is Dell PE T610, the other is a […] The steps are easy. Just download the VMware esxi4 update 1 ISO and install on an USB thumb drive attached on the machine. The only stuff need to twist is the detection of the onboard Realtek 8111C NIC which the original esxi4 doesn’t support. Following the instructions from http://www.vm-help.com/esx40i/customize_oem_tgz.php, I replaced the /bootbank/oem.tgz with the […] Taken from http://www.boche.net/blog/index.php/2010/01/23/vmtn-storage-performance-thread-and-the-emc-celerra-ns-120/ SERVER TYPE: Windows Server 2003 R2 VM ON ESXi 4.0 U1 CPU TYPE / NUMBER: VCPU / 1 / 1GB Ram (thin provisioned) HOST TYPE: HP DL385 G2, 16GB RAM; 2x QC AMD Opteron 2356 Barcelona STORAGE TYPE / DISK NUMBER / RAID LEVEL: EMC Celerra NS-120 / 15x 146GB 15K 4Gb […] find a bug in VMWare Server 2.0.2, cannot add the 3rd user or more for permission assignment after adding the 2nd user and the below error is prompted: Check the file /etc/vmware/hostd/authorization.xml : <ConfigRoot> <ACEData id=”10″> <ACEDataEntity>32</ACEDataEntity> <ACEDataId>10</ACEDataId> <ACEDataIsGroup>false</ACEDataIsGroup> <ACEDataPropagate>true</ACEDataPropagate> <ACEDataRoleId>-1</ACEDataRoleId> <ACEDataUser>sfluk</ACEDataUser> </ACEData> <ACEData id=”11″> <ACEDataEntity>ha-folder-root</ACEDataEntity> <ACEDataId>11</ACEDataId> <ACEDataIsGroup>false</ACEDataIsGroup> <ACEDataPropagate>true</ACEDataPropagate> <ACEDataRoleId>-1</ACEDataRoleId> <ACEDataUser>root</ACEDataUser> </ACEData> <NextAceId>11</NextAceId> </ConfigRoot> It […] C:\Program Files\Common Files\VMware\VMware Remote Console Plug-in\vmware-vmrc.exe Take a look at the directory where your VM is running in the ESX/Vmware Server: e.g. [Storage1] winxp/winxp.vmx Run CMD, go to your PC directory above and then run: vmware-vmrc -h X.X.X.X -m “[Storage1] winxp/winxp.vmx” or vmware-vmrc -h X.X.X.X -M mod_number I found esxtop in esxi 4 is an extremely useful tool to gather system statistics from the esxi server. One piece of data you can use esxtop is to get is the picture of the network load balance between the two NIC vmnic0 and vmnic1. I have configured the esxi server to use the NIC […] Under Linux kernel 2.6, the default system timer is set to 1000Hz which will consumes lot of cpu cycle under a virtualized environment even it is in idle state. To run it under a virtualized environment, suitable kernel parameters should be passed to change the clock source and time divider : for RHEL-4 32 bits: […] I have tried to install the latest CentOS 5.4 on a old Dell Precision 450 as a host for VMware server 2.0.x. However after the installation, I have found that the VMware server 2.0.x is very unstable, the already horrible web management interface crashed indefinitely, making the console interface nearly useless. I have another server […] |
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