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  • Cloning a VM to add a new MySQL Slave

    - by Ben Holness
    I am in the process of adding a new slave to a replicated mysql setup. All of the slave nodes are virtual machines. If I clone one of the nodes to a new VM, then start it with no networking, stop mysql, change the server-id in my.cnf to a new id and then restart mysql and networking, will it all work correctly, or will mysql get confused because it used to be a different server id? OS: Ubuntu 10.10 VM Platform: VMWare 5 MySQL : Server version: 5.1.49-1ubuntu8.1-log (Ubuntu)

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  • How to tune system settings for mongoDB on Linux?

    - by jsh
    Trying to squeeze a lot out of one question here -- please bear with me. Although the MongoDB man pages make several useful recommendations about system settings like ulimit (http://docs.mongodb.org/manual/reference/ulimit/), and other production factors (http://docs.mongodb.org/manual/administration/production-notes/) they seem mysteriously silent on things like virtual memory and swap settings. The closest we get to a hint is that "...the operating system’s virtual memory subsystem manages MongoDB’s memory..." (http://docs.mongodb.org/manual/faq/fundamentals/#does-mongodb-require-a-lot-of-ram). Running the same job - high writes and high reads on about 10,000,000 records in a single collection -- on my 4-processor, 4GB RAM macbook and an 8-core ubuntu box with 64GB RAM I saw dramatically WORSE read performance on the linux box with factory settings, and could hear the disk constantly spinning, indicating high I/O and presumably swapping. Yes, other things were happening on the box, but there was plenty of free RAM, disk space, etc.; furthermore, I did not see evidence that Mongo was expanding to take advantage of all that free RAM as it is touted to do. Linux box default settings were as follows: vm.swappiness =60 vm.dirty_background_ratio = 10 vm.dirty_ratio = 20 vm.dirty_expire_centisecs =3000 vm.dirty_writeback_centisecs=500 I hazarded some guesses looking at docs and blogs for other types of databases (Oracle, MYSQL, etc.), experimented, and adjusted as below. vm.swappiness=10 vm.dirty_background_ratio=5 vm.dirty_ratio=5 vm.dirty_writeback_centisecs=250 vm.dirty_expire_centisecs=500 I saw some immediate apparent improvements in read time. However, when I ran my test jobs again, read performance continued to be painfully sluggish during heavy writes. Then, I REBUILT the collection from an available data source - and suddenly I can read at 1ms or less per record WHILE doing the write job! So the question is really two-fold: 1) What are appropriate VM settings for MongoDB on Linux? 2) (bonus) Does Mongo do some checking or optimization with the OS while data is being built? In other words, if I have built a large data set with suboptimal VM or I/O settings, does Mongo make assumptions during the memory-mapping process that will fail to take advantage of optimizations down the road? Obviously I don't fully grok memory mapping under the hood (I was hoping I wouldn't have to). Any help appreciated...thanks! -j

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  • Configuration to point an X tty to a separate system?

    - by buu700
    Specifically, I have an Ubuntu 10.04 system with a headless Ubuntu 12.04 virtual machine, and I'm looking for a way to have it set up so pressing ctrl+alt+F8 will take me into another X client which is connected to an X server on the vm (with gdm appropriately displayed at startup, etc.). As in, my startup script should spin up the headless machine and then immediately perform a "startx" pointed at the vm.

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  • Windows 7: Some time my mouse got "virtually" unplugged and plugged again in some seconds.

    - by yes123
    So guys, sometime when i am browsing or doing other stuff it's like windows unplugs my usb-logitech-mouse. it than get riconnected again in few seconds. I tihnk this is happening after I had to install virtual machines (like: virtualbox and vmware) I already disinstalled them but this issue is still here. When this happens even the lights on my mouse are off same behaviour as like somone unplagged it. What could i do?

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  • Save image of running Windows 8 to run from Ubuntu

    - by Noel Evans
    I have a brand new Windows 8 PC. I'd like to hold on to the licensed copy in case I need to run a Windows app at some time in the future but want to wipe the machine completely, installing Ubuntu with no dual-boot. Is it possible to save an image of Windows 8 which can then be run (on the same laptop) from Linux as a virtual machine? If so, what applications (ideally free) should I use to make the image and then run it from Ubuntu?

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  • Trouble with Ubuntu on Oracle VM

    - by Rosarch
    I'm running Ubuntu on an Oracle VirtualBox virtual machine. I clicked the "install Ubuntu" button, and it took me through a wizard. I am currently on the following step: Unfortunately, the "forward" button is disabled. What's up with this? I tried entering different data for the form on this step, going back and redoing part of the wizard, and rebooting the machine. Nothing worked. My host OS is Windows 7.

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  • Possible reasons for high CPU load of taskmgr.exe process on VM?

    - by mjn
    On a VMware virtual machine which has severe performance problems I can see a constant average of 20+ percent CPU load for the TASKMGR.EXE (task manager) process. The apps running on this server have lower load, around 4 to 10 percent average. The VM is running Windows 2003 Server Standard with 3.75 GB assigned RAM. I suspect that the task manager CPU load has something to do with other VM instances on the VMWare server but could not see a similar value on internal ESXi systems (the problematic VM runs in the customers IT).

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  • Finding distance to the closest point in a point cloud on an uniform grid

    - by erik
    I have a 3D grid of size AxBxC with equal distance, d, between the points in the grid. Given a number of points, what is the best way of finding the distance to the closest point for each grid point (Every grid point should contain the distance to the closest point in the point cloud) given the assumptions below? Assume that A, B and C are quite big in relation to d, giving a grid of maybe 500x500x500 and that there will be around 1 million points. Also assume that if the distance to the nearest point exceds a distance of D, we do not care about the nearest point distance, and it can safely be set to some large number (D is maybe 2 to 10 times d) Since there will be a great number of grid points and points to search from, a simple exhaustive: for each grid point: for each point: if distance between points < minDistance: minDistance = distance between points is not a good alternative. I was thinking of doing something along the lines of: create a container of size A*B*C where each element holds a container of points for each point: define indexX = round((point position x - grid min position x)/d) // same for y and z add the point to the correct index of the container for each grid point: search the container of that grid point and find the closest point if no points in container and D > 0.5d: search the 26 container indices nearest to the grid point for a closest point .. continue with next layer until a point is found or the distance to that layer is greater than D Basically: put the points in buckets and do a radial search outwards until a points is found for each grid point. Is this a good way of solving the problem, or are there better/faster ways? A solution which is good for parallelisation is preferred.

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  • Azure application working on emulator but not on azure cloud

    - by Hisham Riaz
    firstly i am developing my MVC3 application on visual web developer 2010 express, by migrating my MVC3 (cshtml) files on MVC2. it works great on local system using the emulator, but once i deploy the application on azure it gives runtime errors. example: The layout page "~/Views/Shared/test_page.cshtml" could not be found at the following path: "~/Views/Shared/test_page.cshtml". Source Error: Line 8: //Layout = "~/Views/Shared/upload.cshtml"; Line 9: //Layout = "~/Views/Shared/_Layout2.cshtml"; Line 10: Layout = "~/Views/Shared/test_page.cshtml"; Line 11: } Line 12: else CODE IS AS FOLLOWS: _ViewStart.cshtml file @{ string AccId = Request.QueryString["AccId"].ToString(); if (AccId=="0") { //Layout = "~/Views/Shared/upload.cshtml"; //Layout = "~/Views/Shared/_Layout2.cshtml"; Layout = "~/Views/Shared/test_page.cshtml"; } else { string LayOutPagePath = MVCTest.Models.ComponentClass.GetLayOutPagePath(AccId); Layout = LayOutPagePath; } } ......... how ever the page exist, and is working fine on azure emulator, but not in azure cloud. CODE FOR test_page.cshtml @{ var result = "1234567890"; var temp_xml = MVCTest.Models.ComponentClass.GetTemplateAndTheme("1");//returning xml string LayOutPagePath = MVCTest.Models.ComponentClass.GetLayOutPagePath("1");//returning string } @RenderBody() test_page @temp_xml @result @LayOutPagePath

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  • Titanium Appcelerator - After enabling cloud services I get UnicodeDecodeError when compiling for Android

    - by Shahar Zrihen
    I've got an app that has a UTF8 name (hebrew). I use the platform/android/AndroidManifest.xml file for this. I've managed to narrow it down to the Ti.cloudpush module. only when I enable this module I get the error. I used to be able to compile it to android without any issues but as soon as I enable cloud services I get this error - [ERROR] Exception occured while building Android project: [ERROR] Traceback (most recent call last): [ERROR] File "/Users/Shahar/Library/Application Support/Titanium/mobilesdk/osx/2.1.0.GA/android/builder.py", line 2218, in <module> [ERROR] s.build_and_run(True, None, key, password, alias, output_dir) [ERROR] File "/Users/Shahar/Library/Application Support/Titanium/mobilesdk/osx/2.1.0.GA/android/builder.py", line 1970, in build_and_run [ERROR] self.manifest_changed = self.generate_android_manifest(compiler) [ERROR] File "/Users/Shahar/Library/Application Support/Titanium/mobilesdk/osx/2.1.0.GA/android/builder.py", line 1195, in generate_android_manifest [ERROR] custom_manifest_contents = fill_manifest(custom_manifest_contents) [ERROR] File "/Users/Shahar/Library/Application Support/Titanium/mobilesdk/osx/2.1.0.GA/android/builder.py", line 1122, in fill_manifest [ERROR] manifest_source = manifest_source.replace(ti_permissions,permissions_required_xml) [ERROR] UnicodeDecodeError: 'ascii' codec can't decode byte 0xd7 in position 501: ordinal not in range(128) and this is my manifest file with the part that causes the issues. If I remove the hebrew name, it compiles without any issues <application android:icon="@drawable/appicon" android:label="??????" android:name="QuestionnaireApplication" android:debuggable="false" > <activity android:name=".QuestionnaireActivity" android:label="??????" android:theme="@style/Theme.Titanium" android:screenOrientation="portrait" android:configChanges="keyboardHidden" > Any suggestions?

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  • Centos/OVH: public IP on KVM virtual machine

    - by Sébastien
    Since a few days, I'm trying to configure my KVM vm to have a public IP address, without any success. First, I'm on OVH, and you need to know they don't allow networking from different mac addresses. I have so registered a virtual mac address associated with my failover IP Here's my configuration: Guest wanted IP: 46.105.40.x Host IP: 176.31.240.x Host configuration dummy0 interface: ifcfg-dummy0 BOOTPROTO=static IPADDR=10.0.0.1 NETMASK=255.0.0.0 ONBOOT=yes NM_CONTROLLED=no ARP=yes BRIDGE=br0 br0 bridge: ifcfg-br0 DEVICE=br0 TYPE=Bridge DELAY=0 ONBOOT=yes BOOTPROTO=static IPADDR=192.168.1.1 NETMASK=255.255.255.0 PEERDNS=yes NM_CONTROLLED=no ARP=yes Failover ip is redirected to the br0 bridge with ip route add 46.105.40.xxx dev br0 > cat /proc/sys/net/ipv4/ip_forward 1 > cat /proc/sys/net/ipv4/conf/vnet0/proxy_arp 1 > route -n Destination Gateway Genmask Flags Metric Ref Use Iface 0.0.0.0 176.31.240.254 0.0.0.0 UG 0 0 0 eth0 46.105.40.x 0.0.0.0 255.255.255.255 UH 0 0 0 br0 176.31.240.0 0.0.0.0 255.255.255.0 U 0 0 0 eth0 192.168.1.0 0.0.0.0 255.255.255.0 U 0 0 0 br0 Guest configuration: KVM: <interface type='bridge'> <mac address='02:00:00:30:22:05'/> <source bridge='br0'/> <address type='pci' domain='0x0000' bus='0x00' slot='0x06' function='0x0'/> </interface> I've borrowed most of the OVH configuration here (in french, http://guides.ovh.com/BridgeClient) for the guest configuration eth0 interface: ifcfg-eth0 DEVICE="eth0" BOOTPROTO=none HWADDR="02:00:00:30:22:05" NM_CONTROLLED="yes" ONBOOT="yes" TYPE="Ethernet" UUID="e9138469-0d81-4ee6-b5ab-de0d7d17d1c8" USERCTL=no PEERDNS=yes IPADDR=46.105.40.xxx NETMASK=255.255.255.255 GATEWAY=176.31.240.254 ARP=yes For the routes, I have in route-eth0: 176.31.240.254 dev eth0 default via 176.31.240.254 dev eth0 With this configuration, I don't have any access to the internet. The only thing I can do is to ping the public ip of the host, nothing more. My final conclusion is that the route does not work, because, when, on the guest, I run ping 8.8.8.8, I have, on the host: > tcpdump -i vnet0 icmp tcpdump: verbose output suppressed, use -v or -vv for full protocol decode listening on br0, link-type EN10MB (Ethernet), capture size 65535 bytes 13:38:09.009324 IP 46-105-40-xxx.kimsufi.com > google-public-dns-a.google.com: ICMP echo request, id 50183, seq 1, length 64 13:38:09.815344 IP 46-105-40-xxx.kimsufi.com > google-public-dns-a.google.com: ICMP echo request, id 50183, seq 2, length 64 I never get the ping reply, only the request. It seems Guest - Host communication is fine. On eth0: > tcpdump -i eth0 icmp tcpdump: verbose output suppressed, use -v or -vv for full protocol decode listening on eth0, link-type EN10MB (Ethernet), capture size 65535 bytes 13:39:40.240561 IP 46-105-40-xxx.kimsufi.com > google-public-dns-a.google.com: ICMP echo request, id 50439, seq 1, length 64 13:39:40.250161 IP google-public-dns-a.google.com > 46-105-40-xxx.kimsufi.com: ICMP echo reply, id 50439, seq 1, length 64 I have the request and the reply on eth0, but reply is not forwarded to the bridge. I really don't understand why, I though it was the aim of the route to do that! IPtables is disabled on both host and guest. I really hope some of you will be able to help me! Many thanks in advance, Sébastien

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  • virtual host setup: can't access wordpress site without www

    - by two7s_clash
    I would like to access my site both with and without using the www. Currently it only works with. Leaving out the www just goes to a blank page. Also, wp-admin just loads a blank page too. I have set an A record for mysite.com and www.mysite.com, both pointing to my static Bitnami IP. I also have a subdomain mapped to another directory that is working just fine (conference.mysite.com and www.conference.mysite.com). I'm using a Bitnami stack on an AWS EC2 micro instance. Here is my httpd.conf: ServerRoot "/opt/bitnami/apache2" Listen 80 LoadModule authn_file_module modules/mod_authn_file.so blah blah blah.... LoadModule php5_module modules/libphp5.so <IfModule !mpm_netware_module> <IfModule !mpm_winnt_module> User daemon Group daemon </IfModule> </IfModule> ServerAdmin [email protected] ServerName localhost:80 DocumentRoot "/opt/bitnami/apps/wordpress1/htdocs/" <Directory /> Options FollowSymLinks AllowOverride None Order deny,allow Allow from all </Directory> <Directory "/opt/bitnami/apps/wordpress1/htdocs/"> Options Indexes MultiViews +FollowSymLinks LanguagePriority en AllowOverride All Order allow,deny Allow from all </Directory> <IfModule dir_module> DirectoryIndex index.html index.php </IfModule> <FilesMatch "^\\.ht"> Order allow,deny Deny from all Satisfy All </FilesMatch> ErrorLog "logs/error_log" LogLevel warn <IfModule log_config_module> LogFormat "%h %l %u %t \\"%r\\" %>s %b \\"%{Referer}i\\" \\"%{User-Agent}i\\"" combined LogFormat "%h %l %u %t \\"%r\\" %>s %b" common <IfModule logio_module> LogFormat "%h %l %u %t \\"%r\\" %>s %b \\"%{Referer}i\\" \\"%{User-Agent}i\\" %I %O" combinedio </IfModule> CustomLog "logs/access_log" common </IfModule> <IfModule alias_module> ScriptAlias /cgi-bin/ "/opt/bitnami/apache2/cgi-bin/" </IfModule> <Directory "/opt/bitnami/apache2/cgi-bin"> AllowOverride None Options None Order allow,deny Allow from all </Directory> DefaultType text/plain <IfModule mime_module> TypesConfig conf/mime.types AddType application/x-compress .Z AddType application/x-gzip .gz .tgz </IfModule> Include conf/extra/httpd-mpm.conf <IfModule ssl_module> SSLRandomSeed startup builtin SSLRandomSeed connect builtin </IfModule> AddType application/x-httpd-php .php .phtml LoadModule wsgi_module modules/mod_wsgi.so WSGIPythonHome /opt/bitnami/python ServerSignature Off ServerTokens Prod AddType application/x-httpd-php .php PHPIniDir "/opt/bitnami/php/etc" Include "/opt/bitnami/apps/phpmyadmin/conf/phpmyadmin.conf" ExtendedStatus On <Location /server-status> SetHandler server-status Order Deny,Allow Deny from all Allow from localhost </Location> Include "/opt/bitnami/apache2/conf/bitnami/httpd.conf" Include "/opt/bitnami/apps/virtualhost.conf" Here is my virtual hosts file: NameVirtualHost *:80 <VirtualHost *:80> ServerAdmin xx DocumentRoot "/opt/bitnami/apps/wordpress1/htdocs" ServerName mbird.com ServerAlias www.mbird.com ErrorLog "logs/wordpress-error_log" CustomLog "logs/wordpress-access_log" common </VirtualHost> <Directory "/opt/bitnami/apps/wordpress1/htdocs"> Options Indexes MultiViews +FollowSymLinks AllowOverride All Order allow,deny Allow from all </Directory> ### WordPress conference.mbird.com configuration ### <VirtualHost *:80> ServerAdmin [email protected] DocumentRoot "/opt/bitnami/apps/wordpress/htdocs" ServerName conference.mbird.com ServerAlias www.conference.mbird.com ErrorLog "logs/confwordpress-error_log" CustomLog "logs/confwordpress-access_log" common </VirtualHost> <Directory "/opt/bitnami/apps/wordpress/htdocs"> Options Indexes MultiViews +FollowSymLinks AllowOverride All Order allow,deny Allow from all </Directory> ###

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  • Just a few questions about Hyper-V virtual machines and clustering

    - by René Kåbis
    I have been using Microsoft’s Hyper-V technology for a little while now, but I am just now dipping my toe into clustering. In particular, I am trying to implement a fault-tolerant SQL DB. This involves setting up two VMs, clustering them via Failover Cluster, and then installing SQL Server in some fashion. I have two physical machines - one high-end and rather beefy “heavy lifter” to contain the majority of the VMs, and another “backup” (a repurposed desktop) to hold the essential “secondary” (or failover) AD-DC, SQL and FS VMs. The main reason why I find the failover cluster at the VM level so attractive is that it presents a single IP and DNS entry to the network as a whole - if one machine (physical or virtual) goes down, you might loose some ping and the connections get reset, but the network applications (Microsoft RMS connection to backend SQL) can still connect to a viable DB without having to mess around with the settings at all. My first question is in terms of SQL Server itself. If I have a cluster between two VMs, does it make more sense to install the SQL Server in Failover Cluster configuration or should I simply install it in a stand-alone config and mirror the DBs? For example, this post suggests just mirroring the DBs, but do I just mirror standalone DBs on standalone VMs, or can I get the network and failover benefits of clustered VMs while still utilizing (on each clustered VM) standalone DBs that have been mirrored between each other? As well, I have come across a lot of documentation about SQL clustering, but most assume a number (#2) of physical machines to hold not only the actual SQL VMs but also the Quorum and Witness stores. I will not be able to muster more than two physical machines. As such, I will have to be satisfied with a VM cluster that does not exceed two VMs (one for each physical machine). Another issue involves MSDTC - the Distributed Transaction Coordinator. When attempting to install the SQL Failover Cluster (I never completed it for this reason) it threw a hissy fit because MSDTC had not been clustered. Search as I might, I have not yet found a way to do so under Windows Server 2012 R2. I have found plenty of docs for Windows 2008 and 2008 R2, but these instructions don’t align with 2012 R2 (at least, not in a way that allows me to successfully cluster MSDTC). Plus, some of the instructions that I have found for SQL Server Failover Cluster installation suggest that a third “network device” - shared network storage (a SAN) - is required for the DB itself (and other functionality). I do not have this, and won’t be getting this. Most of my storage exists on the “heavy lifter” that was designed for all of the “primary” VMs. If that physical machine goes down, so does the storage. The secondary server does have enough resources for an AD-DC Server, an SQL server and a File Server, so it will handle the “secondary” failover versions of those VMs (clustered or not). My final question involves file servers. If I cluster file servers between two VMs (one on my “heavy lifter” and another on my “backup”, how do I mirror the data between them? Clustering VMs only provides a single point of access on the network for a resource, it doesn’t exactly replicate data between the two - that is left to the services that serve up that data. I am unsure how I can ensure that file server data between two clustered file server VMs can be properly mirrored. Remember, I only have two devices to be used here - my primary machine and a backup secondary. There is no chance of me obtaining a SAN or any other type of network attached storage. What exists on the machines must act as the storage. Thanks in advance for any suggestions.

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  • Conflicting ip routes with local table on attaching a virtual network interface

    - by user1071840
    I have an EC2 instance with these ip rules: $ sudo ip rule show 0: from all lookup local 32766: from all lookup main 32767: from all lookup default I can attach an elastic network interface to it with a private IP. Say the IP of my machine is 10.1.3.12 and the IP of the interface is 10.1.1.190. As soon as I attach the interface to my machine a new entry is added to the routing policy and local routing table: sudo ip rule show 0: from all lookup local 32765: from 10.1.1.190 lookup 10003 32766: from all lookup main 32767: from all lookup default $ sudo ip route show table local broadcast 10.1.1.0 dev eth3 proto kernel scope link src 10.1.1.190 local 10.1.1.190 dev eth3 proto kernel scope host src 10.1.1.190 broadcast 10.1.1.255 dev eth3 proto kernel scope link src 10.1.1.190 broadcast 10.1.3.0 dev eth0 proto kernel scope link src 10.1.3.12 local 10.1.3.12 dev eth0 proto kernel scope host src 10.1.3.12 broadcast 10.1.3.255 dev eth0 proto kernel scope link src 10.1.3.12 broadcast 127.0.0.0 dev lo proto kernel scope link src 127.0.0.1 local 127.0.0.0/8 dev lo proto kernel scope host src 127.0.0.1 local 127.0.0.1 dev lo proto kernel scope host src 127.0.0.1 broadcast 127.255.255.255 dev lo proto kernel scope link src 127.0.0.1 I can send traffic to this ENI directly from a host that can have the same IP as the host the ENI is attached to. This is where the problem starts. I ran tcpdump on the port in question and saw multiple SYNs going to the ENI with src '10.1.3.12' and destination '10.1.1.190' but didn't see even a single ACK. In my understanding if ACKs were being sent from the ENI they'd have destination as 10.1.3.12 i.e. the same as the local machine's IP and such packets will now be routed as local packets matching local routing policy: local 10.1.3.12 dev eth0 proto kernel scope host src 10.1.3.12 I'd like to send all the packets originating from 10.1.1.190 (my ENI) to go back on the same interface i.e. eth3 in this case. Contents of the nee table 10003 are: $ sudo ip route show table 10003 default via 10.1.1.1 dev eth3 I think I can do the following: I don't know if its possible but probably decrease the priority of local table so the packets match the table 10003. Use iptables to mangle these packets and update the local table route to include the mark information But I'm not sure if these are the right approaches.

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  • Azure : The process cannot access the file "" because it is being used by another process.

    - by Shantanu
    Hi all, I am trying to get a matlab-compiled exe running on Azure cloud, and for that purpose need to get a v78.zip onto the local storage of the cloud and unzip it, before I can try to run an exe on the cloud. The program works fine when executed locally, but on deployment gives and error at line marked below in the code. The error is : The process cannot access the file 'C:\Resources\directory\cc0a20f5c1314f299ade4973ff1f4cad.WebRole.LocalStorage1\v78.zip' because it is being used by another process. Exception Details: System.IO.IOException: The process cannot access the file 'C:\Resources\directory\cc0a20f5c1314f299ade4973ff1f4cad.WebRole.LocalStorage1\v78.zip' because it is being used by another process. The code is given below: string localPath = RoleEnvironment.GetLocalResource("LocalStorage1").RootPath; Response.Write(localPath + " \n"); Directory.SetCurrentDirectory(localPath); CloudBlob mblob = GetProgramContainer().GetBlobReference("v78.zip"); CloudBlockBlob mbblob = mblob.ToBlockBlob; CloudBlob zipblob = GetProgramContainer().GetBlobReference("7z.exe"); string zipPath = Path.Combine(localPath, "7z.exe"); string matlabPath = Path.Combine(localPath, "v78.zip"); IEnumerable<ListBlockItem> blocklist = mbblob.DownloadBlockList(); BlobStream stream = mbblob.OpenRead(); FileStream fs = File.Create(matlabPath); (Exception occurs here) It'll be great help if someone could tell me where I'm going wrong. Thanks! Shan

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  • Linux & Windows Boot Up Times in Amazon Web Service and Windows Azure

    - by Adron
    I've been working with Windows Azure and Amazon Web Services EC2 for a good many months now (almost getting to the years range) and I've seen something over and over that seems troubling. With AWS & Linux I commonly get instance startup times with EC2 around the 1-3 minute range. With AWS & Windows OS on an EC2 instance it often takes 10-20 minutes. With Windows Azure Web or Service Role I often get anywhere from 6-30 minutes waiting for a role to startup. I assume of course this involves booting up a windows instance somewhere in the fabric. I know there has always been tons of FUD about windows vs. Linux, but I'd really like to know why it is that Windows 08 or 03 boots so much slower in the cloud than Linux. Any specific technical information regarding this would be greatly appreciated! Thanks.

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  • MySQL is killing the server IO.

    - by OneOfOne
    I manage a fairly large/busy vBulletin forums (~2-3k requests per second, running on gigenet cloud), the database is ~ 10 GB (~9 milion posts, ~60 queries per second), lately MySQL have been grinding the disk like there's no tomorrow according to iotop and slowing the site. The last idea I can think of is using replication, but I'm not sure how much that would help and worried about database sync. I'm out of ideas, any tips on how to improve the situation would be highly appreciated. Specs : Debian Lenny 64bit ~12Ghz (6 cores) CPU, 7520gb RAM, 160gb disk. Kernel : 2.6.32-4-amd64 mysqld Ver 5.1.54-0.dotdeb.0 for debian-linux-gnu on x86_64 ((Debian)) Other software: vBulletin 3.8.4 memcached 1.2.2 PHP 5.3.5-0.dotdeb.0 (fpm-fcgi) (built: Jan 7 2011 00:07:27) lighttpd/1.4.28 (ssl) - a light and fast webserver PHP and vBulletin are configured to use memcached. MySQL Settings : [mysqld] key_buffer = 128M max_allowed_packet = 16M thread_cache_size = 8 myisam-recover = BACKUP max_connections = 1024 query_cache_limit = 2M query_cache_size = 128M expire_logs_days = 10 max_binlog_size = 100M key_buffer_size = 128M join_buffer_size = 8M tmp_table_size = 16M max_heap_table_size = 16M table_cache = 96

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  • How should I host a site that could potentially get a short spike in traffic of 1000%+

    - by James Simpson
    This is a purely theoretical question, but what if I had a site that would normally only get a couple thousand hits a day, but for a few days each month that could shoot to several hundred thousand or even several million hits over the period of 1-3 days. The site would be pretty bare-bones (as in, 2-3 total pages with 1-2 max MySQL queries on each page and some PHP), so bandwidth wouldn't be the issue, but sheer volume taking down the site would be the main concern. Cloud hosting seems like the best way to go, but would something like Amazon EC2, MediaTemple, or something else be the right choice in this case?

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  • UEC - Can the Cluster Controller and Storage Controller be seperate systems?

    - by Jeremy Hajek
    My department is implementing an Ubuntu Enterprise Cloud. I have done the testing and am quite comfortable with the 4 pieces, CC/SC, CLC, WS, NC. Looking at various documents below it appears the the Storage Controller and Cluster Controller (eucalyptus-sc and eucalyptus-cc) are always installed on the same system. My question is this: can I install the storage controller and the cluster controller on separate systems? http://open.eucalyptus.com/wiki/EucalyptusAdvanced_v2.0 the picture indicates that cc and sc are two different machines http://www.canonical.com/sites/default/files/active/Whitepaper-UbuntuEnterpriseCloudArchitecture-v1.pdf P.10 1st paragraph uses the word "machine(s)" http://software.intel.com/file/31966 P. 8 indicates the same separate architecture BUT... https://help.ubuntu.com/community/UEC/PackageInstallSeparate indicates below that the SC and CC are to be on the same system.

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  • Automatic time tracking with central server, web reports

    - by user124209
    I need a software for automatic time tracking on Windows. With the following features: It should record time spent using the computer each day. Start time and end time. It should record what programs the employee used and total time for that program for specified period of time. It must have a centralized server that collects and stores all data. It could be a cloud server outside of a company network. It must have a web interface for viewing the monthly reports (the last but the most important requirement!). A nice feature to have would be an automatic generation of timesheets and Mac OS X support. I am looking to use it for a small team, this is not for personal use. Does anybody knows about software with these features?

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  • How can I access my music anywhere?

    - by musicfreak
    So here's the idea: I use multiple computers on an almost daily basis. I would like to be able to access my entire music library from any of those computers through the Internet. Is there a service or perhaps some software that would allow me to host my music "in the cloud", or in some other way access it from a different computer? I've searched for something like this and the closest I've found is the Media Player application found in Opera Unite, but that requires my home computer to be turned on at all times, which is less than ideal. I'm willing to pay, but not so much that I could just rent a private server for a lower price. Thanks in advance.

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