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• Replication from OSX OpenDirectory to OpenLDAP

  - by natacado

  I have an OpenDirectory server running on an OSX Server machine, and I'd like to increase the reliability of the service by having a slave server. The problem is, I only have 1 OSX Server but I have plenty of Linux servers available. I'm happy with Apple's tools that integrate with OpenDirectory, but given Apple's recent discontinuation of the XServe, I'm not particularly interested in continuing with Apple hardware. I remember hearing that OpenDirectory is (now-distantly) based off the OpenLDAP code base; is there any way I could replicate from OpenDirectory to OpenLDAP instead of having to purchase another OSX server?

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• What are the limitations of virtual machines?

  - by j-g-faustus

  I'm considering setting up a virtual machine running Windows, with Ubuntu 10.10 as the host OS, for those cases where I have a Windows-only program. I understand that using a VM will lose some performance, but are there other limitations to what the OS in a virtual machine can do compared to "running on bare metal"? For example: Can a VM play games, like Dragon Age Origins or Civilization V? (Possibly with poorer framerates and/or lower resolution, but does it play at all?) Can a VM rip DVD/Blue-ray using AnyDVD or similar Windows program? Can a VM handle new hardware that requires dedicated drivers, but the drivers are only available for the OS running inside the VM? (Ex. graphics card, digital camera, card reader for smart card authentication.) Is it possible to say anything about "general limitations" of VMs, or is this wholly dependent on the specific VM?

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• PostgresQL on Amazon EBS volume, realistic performance, or move to something more lightweight?

  - by Peck

  Hi, I'm working on a little research project, currently running as an instance on ec2, and I'm hoping to figure out whether I'm going down the right path. We, like a thousand other people, are making use of some of twitters streaming feeds to do gather some data to have fun with and my db seems to be having problems keeping up, and queries take what seems to be a very long time. I'm not a DBA by trade, so I'll just dump some info here and add more if need be. System specs: ec2 xl, 15 gigs of ram ebs: 4 100 gb drives, raid 0. The stream we're getting we're looking at around 10k inserts per minute. 3 main tables, with the users we're tracking somewhere in the neighborhood of 26M rows currently. Is this amount of inserts on this hardware too much to ask out of ebs? Should take a look at some things with less overhead like mongodb?

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• Windows 7 safe mode pretends it's Windows XP?

  - by Joachim Kerschbaumer

  Just a question in between. A friend of mine brought me a laptop that does not work anymore and wanted me to check whether I can do something. She told me it's Windows 7, and startup screen and login screen look like it. However, as she gets a bluescreen on startup it is only possible to boot in safe mode where the system pretends to be Windows XP SP3. The system also may have 1 GB of RAM but the system itself states that it has 954 MB of RAM which is a value I've never seen before. Is everything corrupt from operating system to hardware, or am I just a newbie that does not know that Windows 7 pretends to be Windows XP SP3 in safe mode? Or is this laptop just the victim of an illegal, crazy copy of Windows XP sold as Windows 7? Maybe some strange Chinese stuff? I also recognized that the startup screen of Outlook Express reads "Outllok Express" (no typo) I´m kind of confused, maybe someone could put light into this ;)

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• Can using higher rated battery damage device?

  - by Anwar Shah

  I am in need of a battery for my Lenovo 3000 Y410 Laptop. It's installed battery has voltage rating of 10.8v. But the shop i've consulted has only a battery of 11.1v rating. Should I buy the battery? I mean, Does using that battery can damage my laptop? An answer with some good source from hardware vendor will be very much helpful. Please do not just put your opinion. Because I do not see any difference in your opinion and my opinion. My opinion is also "It is bad". But I need some reliable source.

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• HPC Cluster planning workflow?

  - by Veronica

  After three days of intensive Google searching, I have not found any high-level workflow of how to build a low profile - cheap - computing cluster (we are not interested in HA yet). This is just a front-end plus a node for now. We want to start small with rockscluster, provide a web-based server for offering services, and then add nodes as our budget increases. We're small company, so we haven't enough human resources to implement it smoothly. Here are some facts about our environment: Our hardware is not constant (we will add nodes). Our workload will vary (in the order from 200Mb - 1Tb) Our software will change (scientific applications for data mining) Do you know any visual workflow, worksheet, chart, describing the general necessary steps to begin our cluster planning?

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• How to check for bottlenecks in Windows Server 2008 R2

  - by Phil Koury

  I recently switched out a 10 year old server for a brand new server in a small office and upgraded from Windows Server 2000 to Windows Server 2008 R2. After the switch was complete and some configurations were changed around we are running into what appear to be some bottlenecks in the network speed. Accessing programs on the server is slower (resulting in long loading times, slower report generation, etc.) than it was on the old server hardware. I am wondering what options or tools I have, if there are any at all, to find out exactly where these hang ups might be coming from.

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• Recommendation for PCI SATA addon card?

  - by edmicman

  I have a couple of dead PCs from my wife's office that have working SATA HDDs. Sorry, I don't know if they're SATA I or II, just that they're SATA. Unfortunately, all my spare hardware at home is pretty old; all I have is IDE support. I was thinking I could get a PCI addon card on the cheap that would support SATA and put together a budget server of sorts to play with and be able to use those drives. So I've got a couple questions: After some searching it looks like I can get an addon card for ~20 bucks, but it looks like they're all SATA I? Would that matter? It looks like going to SATAII bumps the price up to $40-$60 or so. Are there any recommendations on a card to get?

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• Shared FC LVM VG with LVs for each KVM VM. Clvm required?

  - by Cocoabean

  I have 2 virtual machine hosts running Ubuntu 12.04 and KVM managed with libvirt. They are both connected to the same VG which is a LUN on my SAN over FC. I provision LVs on this shared VG for each VM. I don't think I need HA or failover, but I do want live migration between the hosts. Do I need clvm in this case? As long as I don't try to start the same VM on each host should this work? Clvm requires lots of overhead with clustering tools that I don't think I need. I can deal with manually restarting VMs on other hosts in the event of a hardware failure.

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• EC2-like virtualisation platform with non-RDP access

  - by code'

  I'm looking into setting up a few small VMs. The trouble is the software I intend to install on them (Cisco VPN Client) blocks out networking (other than to the target VPN destination...) with no workaround. This means that Remote Desktop or other methods of connecting to VMs that go via the Internet (e.g. GoToMyPC, LogMeIn) are a non-starter. What I'm really looking for is an EC2-like platform but which gives direct access to the VM through (for example) Hyper-V Manager. Sadly the only way they all seem to offer to remote control the VMs is direct access via Remote Desktop, whereas I need to be one layer above that (if that makes sense). A viable alternative would be to run virtualisation software within a Windows EC2 instance; obviously hardware virtualisation is impossible but I wonder if there are any software virtualisation platforms that could be run and that would work. Does anyone know if something like this exists/is possible? Thanks! C

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• Application Launcher for Hyper-V Server

  - by peterchen

  We are currently in the process of setting up a HyperV R2 Server machine. Though there's not a lot we need to do wihtin the HyperV Server itself, the command line is sure minimalistic. There are a few administrative / Hardware Monitoring tools that we want to run on he machine itself (accessed through remote desktop). I am looking for a simple program/application launcher where we can hook up these maintenance tools (and one to open a new cmd.exe window in case I habitually close the one I'm working in!) However, all tools I tried by now more or less assume explorer is present, and fail in different ways. Before I go and write a simple one myself, any recommendations?

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• Looking for an easier Skype video chat alternative

  - by Paul

  Is there any software 'easier to use' than Skype - ie to get a video conversation going you have to turn on the computer, make sure the speakers are turned on, make sure the web cam is connected, make sure you click answer with Video... I would like to buy a 'single red button' which does all of the above. - Any recommendations? Update @Eric Koslow comment My original question title was "Is there any software/hardware 'easier to use' than Skype?" So the answer is not necessarily a computer running a program, although it might be. I realise Skype makes a good attempt at helping to ensure speakers and web cam are working and helps you to sort them out if they are not, and for a person who isnt computer phobic this should be enough. However I am interested if there is anything available that is 'easier' than this - ie I'm looking for my 'single' red button. ie the mobile phone with video call maybe the closest answer so far, but I would prefer something as 'free' as Skype is.

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• Distributed, Parallel, Fault-tolerant File System

  - by Eddified

  There are so many choices that it's hard to know where to start. My requirements are these: Runs on Linux Most of the files will be between 5-9 MB in size. There will also be a significant number of small-ish jpgs (100px x 100px). All of the files need to be available over http. Redundancy -- ideally it would provide the space efficiency similar to RAID 5 of 75% (in RAID 5 this would be calculated thus: with 4 identical disks, 25% of the space is used for parity = 75% efficent) Must support several petabytes of data scalable runs on commodity hardware In addition, I look for these qualities, though they are not "requirements": Stable, mature file system Lots of momentum and support etc I would like some input as to which file system works best for the given requirements. Some people at my organization are leaning towards MogileFS, but I'm not convinced of the stability and momentum of that project. GlusterFS and Lustre, based on my limited research, appear to be better supported... Thoughts?

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• ZFS SAS/SATA controller recommendations

  - by ewwhite

  I've been working with OpenSolaris and ZFS for 6 months, primarily on a Sun Fire x4540 and standard Dell and HP hardware. One downside to standard Perc and HP Smart Array controllers is that they do not have a true "passthrough" JBOD mode to present individual disks to ZFS. One can configure multiple RAID 0 arrays and get them working in ZFS, but it impacts hotswap capabilities (thus requiring a reboot upon disk failure/replacement). I'm curious as to what SAS/SATA controllers are recommended for home-brewed ZFS JBODs. In addition, how does battery-backed write cache (BBWC) play into the solution?

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• Connect server to router with workstation in between?

  - by letseatfood

  I have a server (9 yr old Dell with Ubuntu 10.04 Server Edition) and a workstation (Laptop with Vista) which are both connected to a router. The workstation is able to access the server via web browser for testing my web development projects. Since the server is old and does not have a wireless card, I am wondering if it is possible to connect the server directly to the workstation while maintaining the ability to connect to the server from the workstation. The reason is that the computers are in a separate room from the router and I am trying to limit the amount of wires on the floor, along with trying to avoid buying more hardware (like a wireless card). Thanks and I will be more than happy to clarify!

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• Convert video files for Maemo (Nokia N900) using ffmpeg/mencoder

  - by Vikrant Chaudhary

  I'm a newbie in video encoding so I'm looking for some expert advice. I'm looking to transcode media files with ffmpeg or mencoder (or something other) on Ubuntu for my Nokia N900 running Maemo. I'd prefer mencoder, because of ffmpeg's crazy dependencies. Video output should be AVC/H.264 (probably hardware accelerated on device). Audio output in AAC (should have preferred Vorbis but not supported natively and requires .mkv which is also not completely supported). Output video should retain the original aspect ratio. Resolution of screen is 800x480 (16:10). (Explanation of why-this-value-is-chosen would be really appreciated). Thanks.

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• Redhat 6 gui installation VS kickstart gives me different packages?

  - by jonaz

  If i do the graphical install and select basic server + aide and screen i get a system with 535 installed packages. If i look at the /root/anaconda-ks.cfg file in that freshly installed system i see: %packages @base @console-internet @core @debugging @directory-client @hardware-monitoring @java-platform @large-systems @network-file-system-client @performance @perl-runtime @security-tools @server-platform @server-policy @system-admin-tools pax python-dmidecode oddjob sgpio certmonger pam_krb5 krb5-workstation nscd pam_ldap nss-pam-ldapd perl-DBD-SQLite aide screen If i then install a NEW system using a kickstart only containing those packages i get 620 installed packages. So basicly my question is why does the system install almost 100 more packages when using kickstart compared to the GUI installation when the exact same packagegroups are selected?

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• Accessing multiple local HD's or RAID with ESXi 4.0

  - by Shawn Anderson

  How to I get additional HD's to be recognized and used by ESXi 4.0. When I purchased my system I had two 2TB HD's, but when I installed ESXi it only recognized one of them. I'm happy to get whatever number of drives that I need (I have a four bay SATA in my Dell T310). What are some options? RAID? If so, is it supported. I guess I would need hardware instead of software since ESXi is so small. The VMWare forums (where I've lived for the last two days) are a charlie foxtrot of outdated and conflicting info. I want to utilize my T310, with 32 GB RAM, 2.8GHz quad core to run many lab Windows VM's. I don't need production level availability but I do want decent performance, even though it's in a lab environment. A huge thanks to Jim B., Zypher, Helvick, and Jeff Hengesbach who posted answers to my earlier predecessor question on why ESXi was so sluggish.

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• Windows 7 Bluetooth Configuration

  - by ahsteele

  I have Bluetooth installed in my laptop. The Bluetooth is enabled according to the status light. However, I do not see Bluetooth listed in device manager or have a control panel option for it. A scan for new hardware doesn't turn up Bluetooth. Nor are any devices listed with a Yellow Exclamation Point. I do have three USB Hubs Listed as "Generic USB Hub." There is no Bluetooth icon in the notification area and Bluetooth is not listed under Devices and Printers. What am I missing?

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• How to set RpcClientAccessServer for a Exchange 2010 mailbox database to a load balancer

  - by Archit Baweja

  I have 2 Exchange 2010 servers each with a Mailbox Database. I have also setup a Hardware Load Balancer (KEMP LoadMaster 2200 to be precise) to load balance the CAS role access. My HLB has an IP of 192.168.1.100. I've setup the DNS A record for mail.mydomain.com to point to 192.168.1.100. However when I try to set the RpcClientAccessServer on a mailbox database using Set-MailboxDatabase "My Mailbox Database" -RpcClientAccessServer mail.mydomain.com I get an error saying Exchange server "mail.mydomain.com" was not found. Please make sure you have typed it correctly. + CategoryInfo : NotSpecified: (:) [], ManagementObjectNotFoundException + FullyQualifiedErrorId : 4082394C Any ideas?

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• Windows replacement for HAProxy

  - by GrayWizardx

  It does not appear that there is a similar question to this already posted, so I will go ahead and ask. I am working on a project that could benefit from having two - four servers handling incoming requests to a backend webservice. The service does not require SSL but does need to support occassional long running processes (upto 120 secs). This project does not at present have the funding to purchase a hardware load balancing solution. I have previously used HAProxy as a solution for this, and found it very simple and straightforward. Is there a similar product for windows (server 2003 or 2008) which provides similar configuration options and runs as a lightweight service? For reasons outside my control I cannot setup a Linux machine (physical or virtual) and so I am looking for behaviour that can be deployed on a windows machine. I can only find Perlbal which appears to fall into this category. So as not to keep this open indifenitely I will give credit to the only answer.

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• Dell Dimension running Fedora12 does a "Sleeping Beauty" and I am not a "handsome prince"!

  - by Jim Dobbs

  Dell Dimension 2350 with a Pentium IV processor and integrated video and network chips running Fedora12 does a "Sleeping Beauty" and I, apparently, am not am not a "handsome prince"! The system puts video and network to sleep and it will not wakeup. I have heard of this problem on laptops, but this is a tower. Any ideas or help is appreciated. I tried to ping the network card from another system and ping fails. The logs indicate that the system continues to be active. Pressing keyboard short-cut keys makes the disk light blink but neither the video or network card comes alive. Failing all else, are there any Linux commands that I could schedule in cron to pulse video and network adapters hourly that will keep them awake? Or, should I wait on Fedora13? Before this machine, I built a Dimension 2400 with Pentium IV and it had the same problem. Fedora9 on the same hardware is fine.

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• 64 Bit Windows drivers for Inspiron 1720

  - by Rob Allen

  Dell doesn't seem to offer 64 bit drivers specifically for the Inspiron 1720 (laptop). I'm going to be upgrading from Vista 32-bit to Windows 7 64bit and I want to pull down the necessary stuff before hand. Are there any Dell systems that are similar enough to the Inspiron 1720 that I can use for a baseline to make sure I still have Ethernet and WiFi after the reinstall? It doesn't matter if they are for Vista 64 or Windows 7. Identified hardware: Processor: Intel mobile Core 2 Duo T7500 Chipset: Intel Mobile 965 Express Wifi: Intel Pro Wireless Drive Controller: Intel Matrix Graphics: nVidia GeForce 8600M GT Bluetooth: Dell TrueMobile 355 + EDR Ricoh card reader I think anything else, the default Windows drivers will be sufficient. Let me know if you think I missed something thing please.

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• telnet to 3389 connects, RDP remote desktop app bails ?

  - by scott_lotus

  I can TELENT 192.168.10.10 3389 and get a connection. But RDP client to 192.168.10.10 immedietly bails (i.e less then 1 sec) "connect" button greys briefly, RDP app remains on screen. Have tried these from many nodes on the subnet to 192.168.10.10 with same result. On 192.168.10.10 Allow Remote Desktop is enabled. On 192.168.10.10 windows firemall is off. Im connecting from the same subnet i.e no firewall hardware / routers in the way. AV software is installed but other nodes on same subnet allow RDP connection using exact same AV settings (network group profile) Checked 192.168.10.10 for any additonal AV software or local firewall products. Im sure non exist. Checked regedit to ensure 3389 was the port set for listening. Seems to be an XP problem (sp3) ( 2 nodes on the my LAN have this issue) and many work fine. Thanks for any help Scott

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• Screen flickers after resuming from hibernate with Intel GMA 3600 (Acer D270 with Intel N2600)

  - by Cameron

  Fresh system install, with correct display driver from Intel (8.14.8.1065). Clicking "Update driver" merely results in a message saying the driver was already up-to-date. After resuming from hibernate the entire screen flickers. This is especially noticeable while using IE9 (which has hardware acceleration enabled by default) on Google maps, in particular while typing in an address in the map search field (the flickering is much worse under these circumstances). Note that sleep worked fine, only hibernate causes this issue. Restarting "fixes" the problem temporarily until the next hibernate-resume. Aero is enabled. This is on Windows 7 (Pro) 32-bit, on an Acer Aspire One D270-1998, with the Intel N2600 (which has the Intel GMA 3600 built-in).

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