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• AirPort Express Discoverability

  - by andybjackson

  I bought an AirPort Express to enable music in a different part of a friend's house using the AirTunes feature. Unfortunately, iTunes or the AirPort Utility don't reliably discover the existence of the device. If I use the "Configure Other..." function within the AirPort Utility and enter the AirPort Express' IP address and password, then I can reliably get access in a daughter window to configure it. This seems to nudge the underlying AirPort Utility into "finding" and displaying the AirPort Express, which it doesn't do on its own even after clicking the "Rescan" button. iTunes then also seems to cotton on to this discovery and present the AiportExpress as an AirTunes option at the bottom right of iTunes. Things then works as we'd like them to. If I close down the AirPort Utility, then iTunes loses the AirPort Express AirTunes speaker, often giving "An unkown error (-15006) occurred while connecting to the remote speaker". Of course, starting the Airport Utility, forcing it to recognise the Airport Express and then starting iTunes, isn't the ease of use I was after. Background info: iTunes is running on Windows XP. The AirPort Express is running in wireless client mode (i.e. is connecting to an unsecured wireless network in the house with nothing connected to its ethernet port). The network router is a Swisscom Motorola 3347NWG (with firmware 7.8.5r1). I have already tried: Disabling the Windows XP firewall Updating the AirPort Express firmware, the AirPort Utility and the router firmware Ensuring Wireless privacy and similar potetnially problematic router settings are off Solutions, or even just ideas of other things to try would be gratefully received.

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• Antivirus Configuration for dedicated SQL and dedicated IIS Servers

  - by Wayne Arthurton

  Our corporate standard is McAfee Enterprise, unfortunately this is non-negotiable. On two types of servers I'm responsible for, SQL & Web, we have noticed major performance issues with the corporate standard setup. Max scan time 45sec One policy for all processes Scan ALL files on write, read and open for backup Heuristics: Find unknown programs, trojans and macros Detect unwanted programs Exclude: EVT, LDF, LOG, MDF, VMD, , windows file protection) This of course still causes major slowdowns. IIS .NET recompiles are slow especially with SharePoint, SQL backups and restores, SQL Analysis Services, Integration Services and temp data from them as well. I have looked from time to time, for some best practices on setting up McAfee of SQL & SQL Analysis Service, SQL Integration Service, Visual Studio, Sharepoint, and .NET web servers in general. How do people setup McAfee enterprise on their corporate serves keeping security intact, but affecting performance as minimally as possible? Has anyone run across white papers on these setups? Obviously some are case by case, but there must be some best practices out there somewhere.

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• Iomega eGo Encrypt Plus Encrypted Partition not mounting properly says "local disk"

  - by mosiac

  I'm working with an Iomega eGo 500gb Encrypt Plus portable drive. When I first set it up and installed the software and set a user password everything worked fine. The partition labeled "IomegaHDD" mounted properly and I could access the free space. Then I changed the ADMIN password which required me to lockout the device, wait 60 seconds, and then login to the Admin section and change the password, lockout the device again, wait 60 seconds, and then log back in with my user password. When I did that it of course unmounted the IomegaHDD partition to secure it, when it remounts it, it only shows up as "local disk" now and will not remount properly. I had not removed the cable while doing any of this. I have since tried unplugging and plugging back in to login to the drove but that has not worked. I'm wondering if I should remove every instance of "generic usb hub" from device manager and wait for it to re-add itself, or move it to a new set of USB ports temporarily to seee if that helps. Any ideas?

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• VMWare ESX, storage over 2TB

  - by Phliplip

  Hi, First of, i'm a webdeveloper and my server experience lies in setting up FreeBSD servers for webserver. I'm working on a project for at photographer, and i'm hired to develop a new online photo ordering system - where user of course can view their photos :) They have a massive need of storage, thus we have bought a HP G6 and 8x1TB SATA HDD. Our plan is to install VMWare ESX 4.0, running multiple virtual machines; FreeBSD 8 for webserver and some windows servers. Allready done that. Then mount one big storage to the BSD, and share it through Samba to the WinServers. The raid is set up with an array of 2x 1TB to handle the VMs. And the rest is setup as 3 2x1TB to handle the photo-data. Thus 2.73TB for photo-data (the raids are 1+0). Now if we add a datastore in the ESX and add the 3 LUNs we can get a datastore of 2.74TB. But i don't se how i can add this datastore direct to the VM. Only the BSD VM needs access to this. Only way is to create a VirtualDisk, with a max of 2TB (8MB blocksize). This is because the datastore where we save the virtualdisk has a maximum filesize of 2TB. Then add it as a harddisk to the BSD VM. In the 'Add Harddisk' pane for the VM, i see an option for Raw Disk Management. I think this is to access the datastore or the raid directly. Only problem is that its greyed out! Can i access the datastorage directly from the BSD? Without creating and adding virtualdisk.

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• Why are my Windows 7 updates continuously failing?

  - by Chris C.

  I'm an advanced level user here with an odd issue. I have two Windows Updates that are failing to install, every single time. I'm getting a mysterious "Code 1" error on both updates, an error for which I'm having difficulty finding a solution. The updates in question are: Security Update for Microsoft Visual C++ 2008 Service Pack 1 Redistributable Package (KB2538243) System Update Readiness Tool for Windows 7 for x64-based Systems (KB947821) [May 2011] Because these updates are failing, the Shut Down button in my start menu always has the shield icon next to it, indicating that "new" updates will be installed on shut down. But, of course, they'll fail and when the PC is restarted, the shield icon is still there. When checking the update history and viewing the details of the failed updates, I get the following: Security Update for Microsoft Visual C++ 2008 Service Pack 1 Redistributable Package (KB2538243) Installation date: ?6/?29/?2011 3:00 AM Installation status: Failed Error details: Code 1 Update type: Important A security issue has been identified leading to MFC application vulnerability in DLL planting due to MFC not specifying the full path to system/localization DLLs. You can protect your computer by installing this update from Microsoft. After you install this item, you may have to restart your computer. More information: http://go.microsoft.com/fwlink/?LinkId=216803 System Update Readiness Tool for Windows 7 for x64-based Systems (KB947821) [May 2011] Installation date: ?6/?28/?2011 3:00 AM Installation status: Failed Error details: Code 1 Update type: Important This tool is being offered because an inconsistency was found in the Windows servicing store which may prevent the successful installation of future updates, service packs, and software. This tool checks your computer for such inconsistencies and tries to resolve issues if found. More information: http://support.microsoft.com/kb/947821 About My System I'm running Windows 7 Home Premium x64 Edition. This is a custom PC build and the OS was installed fresh, not an upgrade from a previous version. I've been running this system for about 4 months. Windows Updates aside, the system is usually quite stable. Thanks in advance for your help!

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• Cygwin - Repo with Separate Git/Working Dir Doesn't Work

  - by Kyle Lacy

  Since I've switched to OS X and Vim, I've found it easiest to manage all of my 'dotfiles' (all of my configuration files and miscellaneous scripts) with Git. Having already set up my dotfiles in a repo following this tutorial, I figured it would also be easy enough to migrate all of my settings into my Cygwin setup on my Windows partition. Already having the repo setup on Github, I simply clone'd the repo, and moved all of the files over to my home directory, making it a mirror of my OS X home directory. Unfortunately, I cannot seem to use the actual repo any further within Cygwin. The problem is that I cannot use my dotfiles repo with git within Cygwin. The setup is unique from most normal git repos, in that the working directory and the git directory are in different locations. Specifically, the working directory is $HOME (/Users/kyle on OS X, /home/kyle in Cygwin), and the git repo is $HOME/.dotfiles.git. So, if I wanted to get the status of the repo, for example, I would type the following command (which I alias to reduce typing, of course): git --work-tree=$HOME --git-dir=$HOME/.dotfiles.git status -uno While this works fine on OS X, this refuses to work within Cygwin. Regardless of whether or not I use my alias, or whether or not I substitute $HOME by hand, I get the following git error: fatal: Not a git repository: /home/Kyle/dotfiles/.git/modules/.build/git I don't understand where this error comes from, but the path /home/Kyle/dotfiles was the original location of the git repo when I initially cloned it. Additionally, it's important to note that the repo relies heavily on submodules. If specifics are necessary, the repo in question can be found on GitHub. The commands I ran to setup the repo in Cygwin can also be found within the Readme file.

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• Cisco Spam Blocker, Iron Port, Lotus Domino, Integration Help

  - by NickToyota

  Hi serverfault universe, I work for a medium sized (roughly 200 user) company. We are attempting to intagrate our new Cisco Spam Video Blocker (ironport) device into our network so that it acts as an incoming filter then passes it off to our Lotus domino mail server. And also vise versa. The way our network is setup currently has an mx record pointing to our Domino mail SMTP incoming server which is currently setup to be an inbound gateway and filter (using symantec domino mail software). We want to replace the inbound gateway with the ironport. Our company has also invested in a pool of external IP addresses which I believe has been currently assigned to our web, email, servers. What would the proper course of action be to successfully integrate the device be? Mx record change? Replace the domino gateway completely with the ironport? We attempted to set the ironport device to the external IP of what our mx record is pointing to without much success. Any help on proper setup would be greatly appreciated.

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• Sync OneNote Notebooks to/on SkyDrive

  - by Sam

  I've got OneNote running on all computers in our house, using it all the time with several people and computers. The only drawback: I want to keep the copies of OneNote in sync without having to run a dedicated server myself. Right now one of my computers has a folder share, where all others sync to, but this is highly impractical since the computer is not always running. So my question is: is it possible to put the notebook files on a (private) SkyDrive Folder and have all the computers sync to there? This way all computers could keep in sync whenever they got access to the web. Can this be done? and, of course, How? [Update] Maybe I should not have taken knowledge about OneNote as granted: OneNote uses a propietary file format, but has a very good in-file-syncing, working on network shares. Generic 'just sync the complete file' won't be useful at all, because I'd just have 'file has changed on server and on client' conflicts all the time. The sync needs to know OneNote files and be able to sync the content - eg. OneNote itself needs to sync the files, not some generic sync tool.

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• How do I provide dpkg configuration parameters to aptitude or apt-get?

  - by troutwine

  When installing gitolite I find that: # aptitude install gitolite The following NEW packages will be installed: gitolite 0 packages upgraded, 1 newly installed, 0 to remove and 29 not upgraded. Need to get 114 kB of archives. After unpacking 348 kB will be used. Get:1 http://security.debian.org/ squeeze/updates/main gitolite all 1.5.4-2+squeeze1 [114 kB] Fetched 114 kB in 0s (202 kB/s) Preconfiguring packages ... Selecting previously deselected package gitolite. (Reading database ... 30593 files and directories currently installed.) Unpacking gitolite (from .../gitolite_1.5.4-2+squeeze1_all.deb) ... Setting up gitolite (1.5.4-2+squeeze1) ... No adminkey given - not initializing gitolite in /var/lib/gitolite. The last line is of interest to me. If I run dpkg-reconfigure -plow gitolite I am presented with a dialog and can modify: the system user name for gitolite, the location of the gitolite repositories and provide the admin pubkey. I'd prefer to use the git system user and provide the admin pubkey on installation, say something of the sort: # aptitude install gitolite --user git --admin-pubkey 'ssh-rsa AAAAB3NzaC1yc2EAAAADAQABAAACAQDAc7kCAi2WkvqpAL1fK1sIw6xjpatJ+Ms2nrwLJPhdovEY3MPZF7mtH+rv1CHFDn66fLGiWevOFp...' That, of course, doesn't work. Can something similar be done? How do I determine the configuration parameters ahead of time? This would be remarkably useful, for instance, when installing gitolite automatically, via puppet or chef.

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• RRAS DNS Entries from Windows Vista / 7 Clients

  - by Christopher

  How do I stop a Win 2003 RRAS server from sending it's own DNS info to the VPN Client? We have RRAS running on Win 2003 Server. The server has a fixed IP, but the RRAS is setup to use DHCP for assigning VPN client IPs. Our DHCP is setup to send 4 DNS server entries in this order: Internal DNS Server Backup Internal DNS Server External DNS Server Backup External DNS Server Here's the thing: the RRAS server seems to automatically send it's own DNS entries (from it's NICs) to the client first, and then the entries from DCHP are applied. But since the RRAS server has Internal DNS and Backup Internal DNS as it's own DNS entries, it sends these first, and when the DCHP DNS entries come down, only the ones not already added get added (just the externals). This results in the following DNS list on the VPN client: External DNS Server Backup External DNS Server Internal DNS Server Backup Internal DNS Server This is no good of course, because internal names will no longer resolve. How do I stop the RRAS server from sending it's own DNS info to the VPN Client? Note this doesn't seem to happen on WinXP - it gets the DNS servers direct from the DHCP in the correct order.

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• Windows 7: Touch gestures in IE not working without explorer.exe being run once

  - by Michael

  Details: Internet Explorer 9 and Windows 7 Professional, running on a HP TouchSmart (touch screen PC). It is going to be a kiosk PC (running a custom GUI for displaying websites). Scenario 1: When running Internet Explorer as a normal program in Windows 7, touch functions work perfectly. I can scroll the website by dragging it with my finger, I can pinch zoom and I can touch-and-hold right click. I now change the default shell in Windows to Internet Explorer (ie. IE starts instead of explorer.exe). Internet Explorer of course starts up when logging in. However, touch functions are reduced to basic clicking (no dragging, no pinch zooming, no touch-and-hold right click). Then I manually start explorer.exe, and the touch functions work again! And here is the weird part: When I kill explorer.exe, the touch functions keeps working - even if I close IE and start a new instance. Scenario 2: The exact same, but instead of changing the default shell to Internet Explorer, I change it to my own program, which uses an embedded Internet Explorer ("WebBrowser"). Same thing happens. What I've tried: Autorun programs: When explorer.exe launches, it launches all the autorun programs. There are no relevant programs being run by explorer, but just in case, I have manually started all the autorun programs, so that it is identical (but without explorer.exe) to a normal login. It still does not work (until I launch explorer.exe). Specifically TabTip.exe, TabTip32.exe and wisptis.exe are all running. All services are also started. To sum it up Running explorer.exe once changes something in the touch capabilities of Internet Explorer. It doesn't matter if explorer.exe is running - as long as it has been run once. Does anyone know what causes this behavior? Or how I can circumvent it neatly? Thanks!

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• mdadm superblock hiding/shadowing partition

  - by Kjell Andreassen

  Short version: Is it safe to do mdadm --zero-superblock /dev/sdd on a disk with a partition (dev/sdd1), filesystem and data? Will the partition be mountable and the data still there? Longer version: I used to have a raid6 array but decided to dismantle it. The disks from the array are now used as non-raid disks. The superblocks were cleared: sudo mdadm --zero-superblock /dev/sdd The disks were repartitioned with fdisk and filesystems created with mfks.ext4. All disks where mounted and everything worked fine. Today, a couple of weeks later, one of the disks is failing to be recognized when trying to mount it, or rather the single partition on it. sudo mount /dev/sdd1 /mnt/tmp mount: special device /dev/sdd1 does not exist fdisk claims there to be a partition on it: sudo fdisk -l /dev/sdd Disk /dev/sdd: 2000.4 GB, 2000398934016 bytes 255 heads, 63 sectors/track, 243201 cylinders Units = cylinders of 16065 * 512 = 8225280 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes Disk identifier: 0xb06f6341 Device Boot Start End Blocks Id System /dev/sdd1 1 243201 1953512001 83 Linux Of course mount is right, the device /dev/sdd1 is not there, I'm guessing udev did not create it because of the mdadm data still on it: sudo mdadm --examine /dev/sdd /dev/sdd: Magic : a92b4efc Version : 1.2 Feature Map : 0x0 Array UUID : b164e513:c0584be1:3cc53326:48691084 Name : pringle:0 (local to host pringle) Creation Time : Sat Jun 16 21:37:14 2012 Raid Level : raid6 Raid Devices : 6 Avail Dev Size : 3907027120 (1863.02 GiB 2000.40 GB) Array Size : 15628107776 (7452.06 GiB 8001.59 GB) Used Dev Size : 3907026944 (1863.02 GiB 2000.40 GB) Data Offset : 2048 sectors Super Offset : 8 sectors State : clean Device UUID : 3ccaeb5b:843531e4:87bf1224:382c16e2 Update Time : Sun Aug 12 22:20:39 2012 Checksum : 4c329db0 - correct Events : 1238535 Layout : left-symmetric Chunk Size : 512K Device Role : Active device 3 Array State : AA.AAA ('A' == active, '.' == missing) My mdadm --zero-superblock apparently didn't work. Can I safely try it again without losing data? If not, are there any suggestion on what do to? Not starting mdadm at all on boot might be a (somewhat unsatisfactory) solution.

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• Windows 2003 R2 x86 Mini dump fails to write to disk

  - by Randy K

  I have 3 blade servers that are Blue Screening with a 0xC2 error as far as we can tell randomly. When it started happening I found that the servers weren't set to do provide a dump because they each have 16GB RAM and a 16GB swap file divided over 4 partitions in 4GB files. I set them to provided a small dump file (64K mini dump), but the dump files aren't being written. On start up the server event log is reporting both Event ID 45 "The system could not sucessfully load the crash dump driver." and Event ID 49 "Configuring the Page file for crash dump failed. Make sure there is a page file on the boot partition and that is large enough to contain all physical memory." I understanding is the the small dump shouldn't need a swap file large enough for all physical memory, but the error seems to point to this not being the case. The issue of course is that the max swap file size is 4GB, so this seems to be impossible. Can anyone point me where to go from here?

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• Need an expert advice on *X display manager, window manager and composit manager combination

  - by fakemustache

  Hello! I have fought with myself whether or not i should ask this question but I find myself stuck and I need another expert opinion. I can't seem find the right combination of display and window manager (and composit manager). I have tried so many different combinations but most of them don't work for me. I have been working with Linux for a few years now and currently I'm running Gentoo with GDM, Openbox(stand alone, Gnome aware) and xcompmgr. But I have tried Metacity, Awesome and Fluxbox with and without Compiz, but always with GDM. What I want: A lightweight, HIGHLY configurable environment that doesn't rely on mouse-input too much (except for web browsing and image processing). At 95% I work with multiple consoles and desktops on multiple screens. What makes me ask is that most lightweight environments seem somewhat "unfinished" and show unexpected behavior quite often. And of course I want an environment that's not TOO ugly to look at as I use it at an average of 10 hours a day. :) Any thoughts? What do you use in a similar situation? Thanks for any advice! (Please excuse my english as I'm from Germany, btw greetings from Berlin ;)))

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• Everything on hard drive suddenly vanished without explanation, but the drive seems otherwise functional

  - by user160705

  Windows 7 Ultimate x64 Custom-built desktop I have a new desktop that I built a few months ago that has a four-year-old WD hard drive and a two-year-old drive. I had set it up so that the newer drive had Windows and most of my files on it while the older drive had my music library, some movies and games, and a backup of all of my documents. About a month ago, I installed some new case fans and, in the process, I temporarily unplugged my hard drive (while the computer was off of course - I took all the necessary precautions) for wire management. I plugged it back in, and didn't really think anything of it. At around that time, however, I noticed that my older hard drive wasn't showing up in Windows Explorer anymore but I didn't really have time to check into it (I had just started college) and I'm finally getting a chance to now. That drive doesn't show up in Windows Explorer at all but it does show up in Disk Management. That screen shows the following: http://puu.sh/17mMN Any idea what happened? Is there any way to recover my files? Thanks in advance for your help! EDIT: The music and games and stuff used to be on "Disc 1", the 465.71 GB of what is now showing as unallocated space.

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• "Modern" Ethernet over coax

  - by Electrons_Ahoy

  So, I've just bought a house. It's reasonably new - built in the early '00s. One of the features that got built in was a cable TV drop in every room. The cabling is gorgeous - there's even a wiring cabinet of sorts in a closet where the cables all tie together to the splitter to the outside line. Of course, my problem is that I only own the one TV. I do, however, own a few computers. What I would love to be able to do is drop a switch in the wiring closet and run 100/1000BASE-T ethernet over the coax in the walls I wouldn't otherwise be using. My fantasy would be if you could get some kind of adapter-plug-thing that would take a coax plug on one side and a cat5/RJ45 plug on the other. Had anyone else done this? Any suggestions? (There are a few other options that suggest themselves - first, I could just use the existing cabling channels and re-run cat5 or 6 through the walls. While tempting, that sounds like more work than I really want to put in, so I'm calling that Plan B. Also, I could just scare up a mess of old 10BASE2 cards and run the house on thinnet, all mid-90s style. While I think I'd get major style points for that, I don't think I can get a 10BASE2 adapter for the new laptop. Also, I have all these super-snazzy gigabit adaptors I'd like to be using. And so forth.)

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• Use icacls to make a directory read-only on Windows 7

  - by Dave G

  I'm attempting to test some filesystem exceptions in a Java based application. I need to find a way to create a directory that is located under %TMP% that is set to read-only. Essentially on UNIX/POSIX platforms, I can do a chmod -w and get this effect. Under Windows 7/NTFS this is of course a different story. I'm running into multiple issues on this. My user has "administrative" right (although this may not always be the case) and as such the directory is created with an ACL including: NT AUTHORITY\SYSTEM BUILTIN\Administrators <my current user> Is there a way using icacls to essentially get this directory into a state where it is read-only PERIOD, do my test, then restore the ACL for removal? EDIT With the information provided by @Ansgar Wiechers I was able to come up with a solution. I used the following: icacls dirname /deny %username%:(WD) In the page located here I found this in the remarks section: icacls preserves the canonical order of ACE entries as: * Explicit denials * Explicit grants * Inherited denials * Inherited grants By performing the above icalcs command, I was able to set the current user's ability to write or append files (WD) to the directory to deny. Then it was a question of returning it to a state post test: icacls dirname /reset /t /c Done

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• Why datacenter water cooling is not widespread?

  - by MainMa

  From what I read and hear about datacenters, there are not too many server rooms which use water cooling, and none of the largerst datacenters use water cooling (correct me if I'm wrong). Also, it's relatively easy to buy an ordinary PC components using water cooling, while water cooled rack servers are nearly nonexistent. On the other hand, using water can possibly (IMO): Reduce the power consumption of large datacenters, especially if it is possible to create direct cooled facilities (i.e. the facility is located near a river or the sea). Reduce noise, making it less painful for humans to work in datacenters. Reduce space needed for the servers: On server level, I imagine that in both rack and blade servers, it's easier to pass the water cooling tubes than to waste space to allow the air to pass inside, On datacenter level, if it's still required to keep the alleys between servers for maintenance access to servers, the empty space under the floor and at the ceiling level used for the air can be removed. So why water cooling systems are not widespread, neither on datacenter level, nor on rack/blade servers level? Is it because: The water cooling is hardly redundant on server level? The direct cost of water cooled facility is too high compared to an ordinary datacenter? It is difficult to maintain such system (regularly cleaning the water cooling system which uses water from a river is of course much more complicated and expensive than just vacuum cleaning the fans)?

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• Large virtual memory size of ElasticSearch JVM

  - by wfaulk

  I am running a JVM to support ElasticSearch. I am still working on sizing and tuning, so I left the JVM's max heap size at ElasticSearch's default of 1GB. After putting data in the database, I find that the JVM's process is showing 50GB in SIZE in top output. It appears that this is actually causing performance problems on the system; other processes are having trouble allocating memory. In asking the ElasticSearch community, they suggested that it's "just" filesystem caching. In my experience, filesystem caching doesn't show up as memory used by a particular process. Of course, they may have been talking about something other than the OS's filesystem cache, maybe something that the JVM or ElasticSearch itself is doing on top of the OS. But they also said that it would be released if needed, and that didn't seem to be happening. So can anyone help me figure out how to tune the JVM, or maybe ElasticSearch itself, to not use so much RAM. System is Solaris 10 x86 with 72GB RAM. JVM is "Java(TM) SE Runtime Environment (build 1.7.0_45-b18)".

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• Performance of file operations on thousands of files on NTFS vs HFS, ext3, others

  - by peterjmag

  [Crossposted from my Ask HN post. Feel free to close it if the question's too broad for superuser.] This is something I've been curious about for years, but I've never found any good discussions on the topic. Of course, my Google-fu might just be failing me... I often deal with projects involving thousands of relatively small files. This means that I'm frequently performing operations on all of those files or a large subset of them—copying the project folder elsewhere, deleting a bunch of temporary files, etc. Of all the machines I've worked on over the years, I've noticed that NTFS handles these tasks consistently slower than HFS on a Mac or ext3/ext4 on a Linux box. However, as far as I can tell, the raw throughput isn't actually slower on NTFS (at least not significantly), but the delay between each individual file is just a tiny bit longer. That little delay really adds up for thousands of files. (Side note: From what I've read, this is one of the reasons git is such a pain on Windows, since it relies so heavily on the file system for its object database.) Granted, my evidence is merely anecdotal—I don't currently have any real performance numbers, but it's something that I'd love to test further (perhaps with a Mac dual-booting into Windows). Still, my geekiness insists that someone out there already has. Can anyone explain this, or perhaps point me in the right direction to research it further myself?

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• Does any Certificate Authority support both SAN and wildcards?

  - by nicholas a. evans

  My basic quandry is that wildcard certificates don't support subdomains of subdomains, nor do they help with alternate domain names. Basically, if my CN is example.com, I want a Subject Alternative Name field that looks roughly like so: DNS:example.com DNS*.example.com DNS:*.beta.example.com DNS:example.net DNS:*.example.net DNS:*.beta.example.net Using a self-signed cert, I verified that the browsers will work just fine with this. Unfortunately, none of the Certificate Authorities that I looked into (Thawte, GoDaddy, Verisign, Digicert) seemed to support both wildcard certs and Subject Alternative Name (sometimes referred to as "Multiple Domain UCC"). I even called up GoDaddy tech support to confirm. Is there a CA (trusted by 99% of browsers) that supports wildcards for the Subject Alternative Name? One little restriction: I'm saddled with Amazon EC2's single Elastic IP per instance limitation. Here are what I see as my backup plans: set up three extra EC2 instances, each configured for a different IP address and cert, and nginx reverse proxy from three of them into the app server(s) introduces latency(?), and even the cheapest EC2 instance isn't that cheap instead of dedicated reverse proxy instances, setup the four or more almost identical EC2 app servers, with nginx using the port to determine which cert to deliver, and use haproxy to distribute the traffic amongst themselves. complicated to configure and manage? I'm not using the cheapest EC2 instance type for my app servers. If I don't need 4+ app servers for the load, it raises the cost. set up an external server (outside of EC2) that doesn't have EC2's Elastic IP address restrictions, setup all of the alternate IP addresses and certificates on that server, and nginx reverse proxy from that server into the EC2 app servers. extra IP addresses are almost free (still need to pay for the server of course), but don't come with the robust "elasticity" that Amazon's Elastic IPs provide. even more latency than in the first scenario. Are these approaches crazy or reasonable? Do you have another one to suggest?

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• Format CD-rom on Windows 7 that Windows 95 can read

  - by Joe Majsterski

  I pulled out my ancient Pentium 100Mhz running Windows 95 to play a game from 1996. This game has a critical bug in it that requires a patch. The problem is, the computer has no way to connect to the Internet or to the LAN. I tried burning a CD-rom on my Windows 7 PC to run on the Win95 PC, but it doesn't even recognize that there's a disc in the drive. I did some research, and apparently Windows 95 can't read UDF format. All the solutions recommend, of course, downloading a driver or fix or somesuch, which is my entire problem in the first place. I tried formatting the CD-rom on my Win7 PC, but all the format choices are versions of UDF. Is there a way to get Windows 7 to format in way that is compatible with Windows 95? EDIT: I think the problem may be that I only have CD-RWs. I think a regular CD-R might work, but I can't find any in the house. I'll see if I can scrounge one up and try that.

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• Why the system information message when accessing an Ubuntu server doesn't match free -m?

  - by Andres

  Each time I SSH into my AWS Ubuntu servers I see a system information message, showing load, memory usage and packages available to install, like this: Welcome to Ubuntu 12.04.3 LTS (GNU/Linux 3.2.0-51-virtual x86_64) * Documentation: https://help.ubuntu.com/ System information as of Sun Nov 10 18:06:43 EST 2013 System load: 0.08 Processes: 127 Usage of /: 4.9% of 98.43GB Users logged in: 1 Memory usage: 69% IP address for eth0: 10.236.136.233 Swap usage: 100% Graph this data and manage this system at https://landscape.canonical.com/ 13 packages can be updated. 0 updates are security updates. Get cloud support with Ubuntu Advantage Cloud Guest http://www.ubuntu.com/business/services/cloud Use Juju to deploy your cloud instances and workloads. https://juju.ubuntu.com/#cloud-precise *** /dev/xvda1 will be checked for errors at next reboot *** *** System restart required *** My question is about the memory percentage shown. In this case, it's showing a 69% of memory usage, but since the swap usage was 100% I checked it by myself. So when I run free -m I get this: total used free shared buffers cached Mem: 1652 1635 17 0 4 29 -/+ buffers/cache: 1601 51 Swap: 895 895 0 And that's of course closer to 100% than to 69%

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• What is the best keyboard for typing speed (not layouts)

  - by Gapton

  So I am a programmer, and I like playing typing speed games. My typing speed is, for common English words, 85 to 90 wpm, max 95. I type on various devices, my laptop, desktop, office pc.... they all have slightly different keyboards. Being a curious programmer, I wonder what types of keyboard is used for the highest possible typing speed. Or let me phrase it in another way, what is the type of keyboards that people use in typing speed contest? Here is something I know that I feel like I can share: It must be a wired keyboard, I can feel the lag as I am typing this on my wireless keyboard, even if it is a slightly more expensive model which claims to have zero lag. I know people prefer a mechanical keyboard, for the hepatic feedback, however I have not tried one. It lasts longer and is noisy, it also does not have the problem of normal keyboards where you press many keys at a time the signals will get all jammed and the computer will only receive one or two keys. I personally prefer those "thin profile" keyboards. I type a lot, and 95 wpm put me in the top 5%, this is of course just on a gaming site. However when I type on the fat keyboards, my fingers have to travel a much longer distance before the keys actually click. This is where I find myself typing much faster with those thin profile keyboards found on my laptop. Because my fingers only hover on the keys and I only need to press a short distance, each stroke takes less force and light rapid strokes is what makes me type fast. When I type on a fat keyboard, I was forced to use heavy strokes, and this slows me down. There must be some people out there who are keyboard scientists, who actually do experiments and user tests with different setups. It would be interesting to understand more about the things we use everyday for not just work but a majority of our communications. P.S. this is about hardware and not about switching keyboard layouts to dvorak

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• Latency between IIS and SQL on same physical, two VMs

  - by Jerad Rose

  I have a single server (2x4 core CPUs, 32GB ram), that is a Windows Server 2012 Hyper V host, and it hosts two guest VMs (also Windows Server 2012 instances). One of them is a web server, the other is a SQL server. When hitting a page that loops over 50 records, there is noticeable latency. I capture/report the timings of each iteration on the loop, and each iteration is about 20-30 milliseconds. Of course, this amounts to over a second of latency for the whole loop. I thought maybe SQL needed to be tuned, but running profiler on it, the queries are showing almost 0 duration, so it seems the bottleneck is in transit between the two VMs. I have both VMs configured to use the actual NIC (vs. using a VNIC), so maybe that's part of my problem. Also, this is a classic ASP site, so it's using the SQL OLE DB provider, and I'm wondering if that is part of the problem. This is a new server setup, from an existing Windows 2003/IIS6 server setup where both web and DB run on the same server instance (no virtualization). On that setup, there is no such latency when looping over the cursor like this. But there are so many variables, I'm not sure where to start ruling things out.

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