Previously, we create a configuration file for each DomU virtual machines in our cluster. Most of the content in these configuration files is the same. The differences are only the name, memory size and image file address. There are several disadvantages of this method: We must create and configure a new configuration file when creating
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Tag: memory
An I/O Performance Comparison Between loopback Backed and blktap Backed Xen File-backed VBD
Posted onI have done some I/O performance benchmark test of Xen DomU. For easier management, some of our DomU VMs are using file-backed VBDs. Previously, our VMs are using Loopback-mounted file-backed VBDs. But blktap-based support are recommended by Xen community. Before considering changing from loopback based VBD to blktap based VBD, I have done this performance
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How to Duplicate Xen DomU Virtual Machines
Posted onAssumption: There are VBD based Xen DomU virtual machines stored under /home/xen/vm-f11-sample/. There are two files under vm-f11-sample: vm0-f11.run (The configuration file) and vmdisk0 (The virtual disk). Now we want to duplicate the virtual machine vm0 stored under vm-f11-sample to vm-10.0.0.213 which is stored under vm-10.0.0.213. And vm-10.0.0.213’s ip will be 10.0.0.213. The steps to
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A Simple CPU and Memory Performance Test of Xen Dom0 and DomU
Posted onPlease refer to Setting Up Xen Dom0 on Fedora : Xen 3.4.1 with Linux Kernel 2.6.29 on Fedora 12 for the platform of this test (this test runs on Fedora 11, however). I have done some simple performance test on DomU and Dom0 and compare with the performance on physical machines. These test are simple,
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Create and Manage Virtual Machines on Xen
Posted onIn this post, these content are introduced: Create and manage file-backed virtual block device (VBD) for virtual machines on xen. Install Fedora 11 via internet as DomU on top of xen. Manage virtual machines using xm. Create file-backed VBD: The actual space of VBD will be the amount of disk the virtual machine used. And
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ld-linux.so Taking High CPU Usage Caused by Adobe Reader
Posted on解决ld-linux.so大量占用CPU 注: 这是在低版本上的Adobe Reader导致的, 较新版本可能已经无此问题. — Zhiqiang Ma on Oct. 29, 2011 在我这边是因为adobe reader导致的. 我解决的方法是这样子的: 1. 复制一份libgtkembedmoz.so并认reader使用它, 这个在preferrence中找到设置一下就可以了, 我是从thunderbird中找到的. 2. #setsebool -P allow_execheap=1 关于这个的相关解释如下 ************************************************************* The following error pops up in setroubleshooter when opening a PDF form with Adobe Reader 8.1.2 on a Fedora 8 system with SELinux in enforcing mode. It looks like an
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Reading List for Distributed Systems and Cloud Computing
Posted onUnderstanding the literature is usually the first step to do research, which is the same for systems research on cloud computing. A reading list may help a lot to those that just start in cloud computing research. Prof. Lin Gu, my PhD supervisor, compiled a reading list for system research on cloud computing. The reading
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