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• Mainstream Linux on 1GB HDD

  - by Ariel Nundi

  Hi, I've decided to start learning Linux + Ryby + RoR. The problem is the only personal computer I have is a laptop with 1GB flash card and I can't afford to buy more hardware right now. The laptop has dual core CPU and 2GB of RAM. Can you recommend a Linux distribution I can install? I've tried the netbook version of Ubuntu, but install failed because of lack of space. I'd prefer a more popular distribution, so I can use my skills say on a job. TIA

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• Remote Desktop or Streaming Software/Services that Supports Gaming

  - by Griffin

  I've simply been amazed by the quality and speed of Onlive, as this technology has the potential of making hardware requirements irrelevant to the average user. However, at the moment Onlive is only for remotely controlling video games, and not desktops or other devices in general. I'm in pursuit of software or services that can accomplish this as well as Onlive does. I need: viewer (client) program portability (able to run on a USB stick) DirectX, OpenGL / full-screen game compatibility on the server side.** Gaming-acceptable color/scaling quality and responsiveness. I have a very powerful desktop at home and I want to be able to access this raw power from any other computer that I stick my USB into (in the same way Onlive gives gamers use of their powerful servers) What software/services has most of the above? NOTE: please specify what features your suggestion doesn't have.

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• Apache hanging with MaxClients is reached

  - by Ash White

  My Apache 2.2 (preform MPM) is hanging when MaxClients is reached, rather than queueing up requests and serving them when child processes become free. When this happens, the web server is totally unresponsive until it is manually restarted. The server stack is Ubuntu 8, MySQL 5, PHP 5. Hardware is Dual Xeons (2.8) with 2GB of RAM. It serves 30,000 - 50,000 pageviews per day. Static images, CSS, and JS are offloaded to a separate server and PHP is cached using eAccelerator. The HTML output of many pages is cached to the filesystem. Relevant Apache directives: KeepAlive On MaxKeepAliveRequests 50 KeepAliveTimeout 2 StartServers 2 MaxClients 150 MinSpareThreads 25 MaxSpareThreads 75 ThreadsPerChild 25 MaxRequestsPerChild 2000

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• vmware server end of life, where to go now?

  - by matnagel

  We have some virtual machines on vmware server 2.x running on 64 bit hardware and quite happy with it. As vmware server will no longer be offered we are thinking to migrate to ESXi, which seems is free. We will have to install the specialized network cards but that's a minor problem. But once left alone with a quite silently discontinued product there is some resistance to vmware. VirtualBox seems to work: http://blogs.oracle.com/virtualization/2010/06/migrating_from_vmware_to_virtu.html What other free (of licencing cost) options are there? We have windows server 2003 32 bit VMs and also linux 32 and 64 bit VMs to migrate. So xen does not seem an option, which does not run microsoft OSes.

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• dhcpd: varying vendor-class-identifier

  - by jessicah

  I'm having trouble selectively sending parameters in response to a DHCP Inform packet using groups (or even without, just using host declarations) for bootp stuff. My configuration file right now looks like: subnet 130.123.131.128 netmask 255.255.255.128 { allow unknown-clients; } host dev-mac-09 { option vendor-class-identifier "example-identifier"; hardware ethernet 10:9a:dd:51:ff:83; } If I put vendor-class-identifier in the global scope, using tcpdump I can see that the client receives the vendor class option successfully. If I take it out, and just keep it in the host scope (or group scope), the client never receives the option. Specifying option dhcp-parameter-request list 60 doesn't help either. I did try using a class definition inside a group, but then it applied even if the host wasn't a part of the group. As an aside, how do I get detailed logging? At least something to indicate what groups and things got used to generate the response to the client.

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• MySQL 5.1.49 freezing every two days

  - by maximus

  Hi all, our mysql system is "freezing" every two days. By "freezing" i mean the following: it doesn't respond to ping we can't login with SSH we don't get any answer from MySQL there is no entry in the error logs! neither from linux neither from MySQL. we have already changed to a completely new hardware, we have the same problem, so it's definitely not a hardware problem. we do not have any other software installed except a firewall (iptables rule) we can restart the server from another server using rsyslog (www.rsyslog.com)(software reset) Could someone help me, by giving me some pointers what could i do to figure out the problem? I have included every detail about our settings. Thank you in advance for your help. Max. Our system parameters and settings: System-Memory: 12GB Processor: Intel 7-920 Quadcore Operating system: Debian 5 (lenny) 64bit MySQL 5.1.49 Databases: (a) a small phpbb forum (b) a 6GB database 3 tables with about 15 million rows my.cnf # # The MySQL database server configuration file. # # You can copy this to one of: # - "/etc/mysql/my.cnf" to set global options, # - "~/.my.cnf" to set user-specific options. # # One can use all long options that the program supports. # Run program with --help to get a list of available options and with # --print-defaults to see which it would actually understand and use. # # For explanations see # http://dev.mysql.com/doc/mysql/en/server-system-variables.html # This will be passed to all mysql clients # It has been reported that passwords should be enclosed with ticks/quotes # escpecially if they contain "#" chars... # Remember to edit /etc/mysql/debian.cnf when changing the socket location. [client] port = 3306 socket = /var/run/mysqld/mysqld.sock # Here is entries for some specific programs # The following values assume you have at least 32M ram # This was formally known as [safe_mysqld]. Both versions are currently parsed. [mysqld_safe] socket = /var/run/mysqld/mysqld.sock nice = 0 [mysqld] # # * Basic Settings # user = mysql pid-file = /var/run/mysqld/mysqld.pid socket = /var/run/mysqld/mysqld.sock port = 3306 basedir = /usr datadir = /var/lib/mysql tmpdir = /tmp language = /usr/share/mysql/english skip-external-locking # # Instead of skip-networking the default is now to listen only on # localhost which is more compatible and is not less secure. bind-address = our-ip-address # # * Fine Tuning # key_buffer = 16M max_allowed_packet = 16M thread_stack = 256K thread_cache_size = 32 max_connections = 300 table_cache = 2048 #thread_concurrency = 4 # Used for InnoDB tables recommended to 50%-80% available memory innodb_buffer_pool_size = 6G # 20MB sometimes larger innodb_additional_mem_pool_size = 20M # 8M-16M is good for most situations innodb_log_buffer_size = 8M # Disable XA support because we do not use it innodb-support-xa = 0 # 1 is default wich is 100% secure but 2 offers better performance innodb_flush_log_at_trx_commit = 1 innodb_flush_method = O_DIRECT #innodb_thread_concurency = 8 # Recommended 64M - 512M depending on server size innodb_log_file_size = 512M # One file per table innodb_file_per_table # # * Query Cache Configuration # query_cache_limit = 1M query_cache_size = 16M #query_cache_type = 1 #query_cache_min_res_unit= 2K #join_buffer_size = 1M # # * Logging and Replication # # Both location gets rotated by the cronjob. # Be aware that this log type is a performance killer. # As of 5.1 you can enable the log at runtime! #general_log_file = /var/log/mysql/mysql.log #general_log = 1 # # Error logging goes to syslog. This is a Debian improvement :) # # Here you can see queries with especially long duration log_slow_queries = /var/log/mysql/mysql-slow.log long_query_time = 2 log-queries-not-using-indexes # # The following can be used as easy to replay backup logs or for replication. #server-id = 1 log_bin = /var/log/mysql/mysql-bin.log # WARNING: Using expire_logs_days without bin_log crashes the server! See README.Debian! expire_logs_days = 10 max_binlog_size = 100M #binlog_do_db = include_database_name #binlog_ignore_db = include_database_name # # InnoDB is enabled by default with a 10MB datafile in /var/lib/mysql/. # Read the manual for more InnoDB related options. There are many! # * InnoDB plugin # As of MySQL 5.1.38, the InnoDB plugin from Oracle is included in the MySQL source code. # It has many improvements and better performances than the built-in InnoDB storage engine. # Please read http://www.innodb.com/products/innodb_plugin/ for more information. # Uncommenting the two following lines to use the InnoDB plugin. ignore_builtin_innodb plugin-load=innodb=ha_innodb_plugin.so # # * Security Features # # Read the manual, too, if you want chroot! # chroot = /var/lib/mysql/ # # For generating SSL certificates I recommend the OpenSSL GUI "tinyca". # # ssl-ca=/etc/mysql/cacert.pem # ssl-cert=/etc/mysql/server-cert.pem # ssl-key=/etc/mysql/server-key.pem [mysqldump] quick quote-names max_allowed_packet = 16M [mysql] #no-auto-rehash # faster start of mysql but no tab completition [isamchk] key_buffer = 16M # # * NDB Cluster # # See /usr/share/doc/mysql-server-*/README.Debian for more information. # # The following configuration is read by the NDB Data Nodes (ndbd processes) # not from the NDB Management Nodes (ndb_mgmd processes). # # [MYSQL_CLUSTER] # ndb-connectstring=127.0.0.1 # # * IMPORTANT: Additional settings that can override those from this file! # !includedir /etc/mysql/conf.d/ UPDATE After installing sysstat and configuring it to collect data after every minute i have the following datas. I used sar to generate the following output: The log-file is too big so coudn't enter it here but uploaded to box.net. The link is http://www.box.net/shared/xc6rh7qqob SECOND UPDATE We started a ping command in the background, and that solved the problem. Now the server does work since more then a week. We still don't know what's the problem.

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• What are the licensing differences between Windows 8 Professional x64 fqc-05955 and fqc-05956?

  - by Razvan Panda

  If I do a search for Windows 8 Professional x64 in my country, the only version I can find is having the code fqc-05955 and is labeled OEM. If I perform same search on amazon.com, the only version I can find is having the code fqc-05956 and is labeled System Builder. There's not much information about licensing of Windows 8 that I could find. According to this article when using System Builder it can be transferred from one computer to another. What are the differences in licensing between those 2? Is fqc-05955 transferable from one hardware to another like System Builder is? Can I install fqc-05955 on a computer I already own that has no prior windows licensing? I am asking this, since many stores that sell fqc-05955 say it can only be bough with a computer. Thanks for your help!

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• What is a usable throughput for a home media server

  - by Craig

  I am looking to setup a home server that will act as a media server. This will include both video (possibly HD) and audio. The clients will be a fun mix of hardware but that is a different question. What I want to know is what is the minimum throughput for streaming video without hitches? Is there a "sweet" spot for throughput (price vs. throughput)? I am determining my budget for this "upgrade" and I need to evaluate wether or not upgrading to a 1 Gbps home LAN is required. Sure, it would be sweet and easily handle the traffic but I don't want to do it unless it is necesary.

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• Install Windows Server 2008 Core on a Dell Optiplex 790

  - by Alex Marshall

  Does anybody have experience installing Windows Server 2008 Core on a Dell Optiplex 790? When I connect to the machine with the Hyper-V Manager Administrator snap-in, and try to create and run a virtual machine, I get the error "The Virtual Machine could not be started because the hypervisor is not running". I've disabled the Execute Disable functionality in the BIOS as was requried for other Dell models, but no matter what combination of security and virtualization settings I use on the machine, I can't get this working. EDIT: I've installed Windows Server 2008 Core on a Dell Optiplex 790, and I'm trying to install and setup a guest VM on the Hypervisor EDIT 2: The Hyper-V role is installed and configured, without any errors in the event log. Hardware-assisted virtualization is also enabled.

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• Digital Blue Digital Movie Creator 3.0 driver

  - by hjdx

  I'm having a complete 'mare of a time trying to use my schools Digital Blue cameras. We've got the model 3 ones, but can't find the driver disc and using the Windows Hardware Installation Wizard gets me no where! Can you help me to find the driver? When I've used it at my old school it had a piece of software called the Digital Movie Creator, which I've heard you can use to make stop-motion films, which is what I want to do! This is what it looks like http://www.amazon.co.uk/Digital-Movie-Creator-1GB-Card/dp/B000LP30LA/ref=sr_1_2?ie=UTF8&s=software&qid=1265928833&sr=1-2

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• Proxy Appliance

  - by Kumar

  I'm looking for a way to set-up a web proxy at home. Hopefully there's a solution I can use to do this. Alternatively, do you have any ideas for setting up one at home using a proxy with an auto updating list? UPDATE - AutoUpdating list so the new sites are categorized and downloaded and the filtering is done by category instead of per site e.g. peerblock works this way Appliance as in a small dedicated hardware or device to perform this task, like WD TV live or Acer Aspire Revo with the media center edition I'd be ok with setting up Squid / Linux / SquidGuard even if i'm not familiar with *nix but ideally a small form factor pc with dual nic's would be ideal so it can be out of sight for the most part !

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• pfSense + DDoS Protection

  - by Jeremy

  I run a gaming community on a colo with a 100Mbps port. I want to buy a very cheap 35 dollar server with the same 100Mbps port, and run pfSense to use as a hardware firewall. I'm dealing with a bunch of 14 year old kids that have access to botnets, so it can become a bit necessary to get something like this. My overall question, is using pfSense on a cheap identical datacenter/port speed server worth it to actually block DDoS attacks? A bit more into detail since I assume you will ask this, the attacks we receive are normally around 1Gbps. We currently run CentOS using CSF Firewall, and even when using a software firewall, we block 500Mbps UDP floods, or just generic attacks pretty easily. Thanks, - Necro

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• iMac G5 20" (First All-In-One White Screen) Cannot Connect To Internet

  - by Goober

  The Scenario I've got an iMac G5 20" (First All-In-One White Screen) PPC. It has an Airport Extreme Network card in order to wirelessly to connect to the internet. For the most part I connect using ethernet as opposed to wirelessly, but recently have had the need to connect using the wireless. The Hardware BT Home Broadband Wireless Router. iMac G5 20" From about 5 years ago (First All-In-One White Screen) The Issue Even though I know for a fact that It has connected to the internet wireslessly in the past, for some reason it can discover the wireless router, but upon entering the password it fails to connect. I have tried multiple times to no avail. I have 2 other Mac's on the network and a pc that can all connect wirelessly. However both the mac's. Question Any ideas as to why my really old iMac G5 can't connect wirelessly anymore!?

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• RAID1 Hard drives with Intel Controller

  - by Dave_H

  I have an older server with 2 35GB hard drives arranged as a RAID-1 drive. I have 3 open bays, I'd like to add 2 more hard drives to the open bays and have all 4 drives configured as a RAID-1 drive that Windows sees as 1 larger drive. Is this possible? If not, the new drives are 2x as big as the old drives, is it possible to replace 1 of the old drives and rebuild then replace the second drive and rebuild and somehow expand the array to use all of the available space? The server is using an Intel hardware raid controller, the software interface is Intel Storage Console v2.12.

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• RAMDiskVE keeps causing computer to freeze

  - by Steph

  I found this in the Event Viewer logs: The description for Event ID 11 from source RAMDiskVE cannot be found. Either the component that raises this event is not installed on your local computer or the installation is corrupted. You can install or repair the component on the local computer. Which doesn't say much. The details don't reveal much more: Failed to read configuration information from registry. 0000000002002C00000000000B0007C0000000000000000000000000000000000000000000000000 So my question is, what is RAMDiskVE and what device is it for? Basically I'm trying to rule out hardware but I have no idea what's failing...

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• Where do I find a color profile for my MacBook Pro display?

  - by Jesse

  I installed Windows 7 on my MacBook Pro, overwriting OSX Lion. The screen has a blue tint due to lack of a calibrated color profile. I once used the "Color LCD" ICC profile from the OSX partition and it worked great, but I've since lost it since I decided to overwrite OSX completely. I tried the manual calibration in Windows 7 but I just can't seem to get it right like it was while using the color profile that was on the OSX partition. All Google tells me is where to find the ICC profile in OSX, and to copy it over. Do I have to reinstall OSX just for the color profile? Even if I do, where does the profile actually come from? Is it on the OSX disk, or is it somehow retrieved from the hardware itself? Is there a way to get it without reinstalling OSX? Thanks!

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• How to watch 3D on Acer "3D Ready" projector?

  - by glenneroo

  We have here a Acer P1200 DLP projector which is "3D Ready" (using the BrilliantColor™ DarkChip™ 3) and documentation was not included in the packaging. We don't have a Blu-ray player and have no intention of purchasing one in the near future so I'm looking for a way to view encoded or streamed content. My question is: How is it possible to watch 3D content? What extra hardware/software will I need? EDIT: Found this information in the user manual: DLP 3D function: Choose while using DLP 3D glasses, quad buffer (NVIDIA/ATI…) graphic card and HQFS format file or DVD with corresponding SW player. 3D Sync L/R: If you see a discrete or overlapping image while wearing DLP 3D glasses, you may need to execute "Invert" to get best match of left/ right image sequence to get the correct image (for DLP 3D). ...but I'm still at a loss. What is a quad buffer graphics card?

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• Win 7 move ssd from SATA 1 to SATA 0, drive letter from G: to C:

  - by GaryH

  I got a new SSD, plugged it in on my notebook to the available SATA 1 connector and installed Win7 (Ultimate) on it as drive G:. It is working great. Now I would like to move the SSD to the SATA 0 connector and change the drive letter to C:. The existing 500gb HD that has another copy of Win7 (home) on it I will format and connect to the SATA 1 connector as the G: or some other letter drive. Is this possible? Is there software that will go through the registry and "correct" all of the entries for "G:" for everything installed and fix it all up? Or am I better off biting the bullet and setting the hardware where I want it and doing a fresh install of everything? Thanx, G

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• Virtual system drive is split between separate LUNs

  - by Tigran

  My hardware VMWare guy told me that a Win2008R2 server I have has a D drive that is split between two separate LUNs. He could not tell me if that's a good thing or bad just that it's not standard practice for him. Would you please explain the benefits or drawbacks of this setup? Thanks EDIT Some additional info. What happened was I had D drive already allocated. Then I asked for more. They said there's no more space on whatever LUN my D drive is on so the option they gave me was that part of the D drive will be on one LUN and other part will be on another LUN. Hope that helps

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• Doubts about Cloud Infrastructure

  - by Pravin

  Maybe a little more of the same questions that others have asked but wanted to clarify my doubt, for some years run my hosting company (reseller of esds) and I've done well so far, but I am determined to bring quality and server technology to offer another level. So far I have understood that there is a difference between cloud and cluster servers because the cluster function as load balancers that distribute in different servers roles and use the servers less overloaded in the cloud is the union of multiple servers and then the same is vitualized unlike the cluster that is allowed to use the resources of the CPU and RAM servers in the virtualized environment. My approach is to use 3 dedicated servers to create a cloud server, My doubts: Does this type of cloud servers are only reserved for big companies? (Either because the union of the servers is done by hardware or software with high price) What characteristics should these servers meet? Possibly through software which should be used? Available? Thanks for your time, Cheers!

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• Looking for detailed Instructions on building a DIY NAS

  - by Kaushik Gopal

  I'm looking for good links with detailed instructions on how to build a DIY NAS (Network Access Storage). I'm planning on doing it cheap (old PC config + open source software). I did a fair bit of searching and found these links (so please suggest others). While these links are great they delve more on the hardware side. I'm looking for more instructions in the software side. Ubuntu Setting up a Home NAS DIY NAS Smackdown How to Configure an $80 File Server in 45 Minutes FreeNAS Build a NAS Device With an Old PC and Free Software Build Your Own NAS Device

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• Predictive vs Least Connection Load Balancing Techniques

  - by Mani

  I have a windows based desktop application that communicates via TCP to the application servers. (windows 2003). No sticky sessions between client calls. We have exactly 2 servers to load balance and we are thinking to use a F5 hardware NLB. The application is a heavy load types, doing not much bussiness logic in the services but retrieving quite a big amount of data at most of the times. May be on an average 5000 to 10000 records at all times. Used mainly for storing and retirieving data and no special processing of data or calculations running on the server side. I am favouring 'predictive' considering my services take a while at times to return data and hence tracking the feedback would yield some better routing as in predictive. I am not sure if the given data is sufficient enough to suggest some ideas but considering these, what would be some suggestions\things to consider\best between Predictive and Least Connections ? Thanks.

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• PEN daemon as load balancer, IIS web logs not showing true requester IPs

  - by Aszurom

  I have a Hercules vmware appliance, which is a micro-linux vm that runs the PEN daemon and acts as a server load-balancer. It takes any incoming request on the appliance's IP and routes it out to a number of alternate IPs. The logs of the daemon show the true IP of the browsers hitting the website. The logs of the websites themselves (iis 6 and 7) only show the requester IP as being that of the load balancer. The IT manager tells me that when we had a hardware appliance (serveriron XL) doing the load balancing, the web logs reflected the requester IPs accurately. Is there any way to get this resolved with the daemon, or will I be digging that out of the closet and plugging it back in?

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• MaxClients in apache. How to know the size of my proccess?

  - by Larry

  From http://httpd.apache.org/docs/2.2/misc/perf-tuning.html The single biggest hardware issue affecting webserver performance is RAM. A webserver should never ever have to swap, as swapping increases the latency of each request beyond a point that users consider "fast enough". This causes users to hit stop and reload, further increasing the load. You can, and should, control the MaxClients setting so that your server does not spawn so many children it starts swapping. This procedure for doing this is simple: determine the size of your average Apache process, by looking at your process list via a tool such as top, and divide this into your total available memory, leaving some room for other processes. The main issue is that I can't understand how to know the size, because, well i have the size of httpd on no more of 3888 But, if we need to determine the number for MaxClients, and I have 4GB of RAM, so I get: 972, so I should use like 900 in the MaxClients?

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• Duplicate incoming TCP traffic on Debian Squeeze

  - by Erwan Queffélec

  I have to test a homebrew server that accepts a lot of incoming TCP traffic on a single port. The protocol is homebrew as well. For testing purposes, I'd like to send this traffic both : - to the production server (say, listening on port 12345) - to the test server (say, listening on port 23456) My clients apps are "dumb" : they never read data back, and the server never replies anyway, my server only accepts connections, and do statistical computations and store/forward/service both raw and computed data. Actually, client apps and hardware are so simple there is no way I can tell clients to send their stream on both servers... And using "fake" clients is not good enough. What could be the simplest solution ? I can of course write an intermediary app that just copy incoming data and send it back to the testing server, pretending to be the client. I have a single server running Squeeze and have total control over it. Thanks in advance for your replies.

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