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• Fail rate of EBS snapshots and AMIs?

  - by user784637

  According to Amazon the fail rate of EBS volumes is: As an example, volumes that operate with 20 GB or less of modified data since their most recent Amazon EBS snapshot can expect an annual failure rate (AFR) of between 0.1% – 0.5%, where failure refers to a complete loss of the volume http://aws.amazon.com/ebs/ However, I was curious to know the fail rate of EBS snapshots and private AMIs that a system admin would take. Since the EBS snapshots and AMIs are stored in Amazon s3, is it safe to assume that the likelihood you cannot rollback to a previous snapshot or AMI the same likelihood that a file gets lost in s3? Amazon S3’s standard storage is: ... Designed to provide 99.999999999% durability and 99.99% availability of objects over a given year. http://aws.amazon.com/s3/

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• How to make exe of autohotkey scripts?

  - by Jitendra vyas

  see example http://antun.vkrgnf.com/wp-content/uploads/2008/03/jttss02_insertmodule.png download this application then see what i want http://antun.vkrgnf.com/?page_id=2 for example if i have a text like this Before you make that important call (or after a configuration change) be sure to check your connection and volume with Skypes Test Call (echo 123) It takes less than a minute to complete. and if i select whole text via mouse or keyboard then something bar like this example tool which should have a button for different HTML tag to make content to html in any browser or software. want to custom Text bar like this. but independent like this

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• Can I have both Windows dynamic disk partition and some other non-Windows partition on the same disk?

  - by haimg

  When a basic Windows disk is converted to dynamic, Windows creates a partition that span the whole disk with the type of "Windows LVM" and manages its dynamic partitions within this space. So even if there is still free space on this disk, it is not visible to any other OS besides Windows. This happens with MBR and GPT disks both. I would like to share a Windows dynamic disk with some other OS. I have to have dynamic disks because I use Windows SoftRaid (mirrors). So, my questions are: Is there any way to "force" Windows to take up less then the whole disk when it converts a basic disk to dynamic? Will Windows tolerate having some other non-Windows partition on its dynamic disk?

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• How to stop a group of systemd custom services

  - by tsingyue

  I wrote three service units, say a.service b.service and c.service. C requires and runs after b, b requires and runs after a, so when I execute "systemctl start c.service", all three of them will be launched one by one. But when I want to stop all of them, I have to execute "systemctl stop a.service b.service c.service". Is there any other way to stop all of them with less typing? I know with "Bindto=" I can use "systemctl stop a.service" to stop all of them, but what if I got c Bindto a and b, while a and b have no required relationship to each other?

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• Xenserver boot error

  - by Adrian

  I'm trying to get Xenserver 5.5 running on a spare computer here, hardware specs: Intel Q6600, 4GB Ram, and Gigabyte GA-P35-DS3R motherboard Xenserver itself installs fine onto a 150GB sata hdd, however it fails to boot whatsoever, giving this garbled mess: http://img697.imageshack.us/img697/9918/biosi.jpg it's not frozen because if I press enter it just prints a different garble and it also says "could not find kernel image". The strangest thing is if I put that hdd in my desktop and assign it to a VMWare desktop vm (under the ESX profile no less) it boots perfectly... leading me to believe there are no problems with the install or the hdd itself. From what I can tell the error seems to be occuring completely seperately to Xenserver, in the bootloader extlinux?. If there was a motherboard compatibility issue I would think it would also have manifested during installation, and the fact the problem seems to be with the booting into Xen makes me doubt this. Any ideas guys? (I'm using Xen because it can do PCI passthrough without VT-d.)

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• Resolving DNS queries for two disconnected, private, networks

  - by Mikeage

  I'm trying to setup two PCs (one Windows, one Linux, but my understanding is that this problem is more DNS and less OS) as follows: Home network: 192.168.1.0/24 VPN (via OpenVPN server not within the home network): 192.168.2.0/24 . I would like a PC on both networks to be able to access three different types of site: Internet addresses Addresses on the home network Addresses on the vpn However, I'm not sure how/which DNS servers to use. If I prioritize my home DNS server, I can resolve (1) and (2), but not (3). If I prioritize my VPN DNS server, I can't resolve addresses of type (2). Of course, looking up addresses via nslookup and explicitly setting the correct server works, so I know my local DNS servers are OK. Is there any way I can set up my PCs to fallback on the second DNS server if there is no response? Alternatively, is there any way I can tell different queries to go to different servers [maybe by setting up different subdomains; foo.local.something vs. bar.vpn.something]? Thanks

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• Installing Fedora 11 fIlesystem from ISO in to a VM image

  - by okhalid

  Hi, I need to install Fedora 11 in my monitor-less linux box which is running some where in a data center. I will use Fedora 11 as a virtual machine. What I already know/have: 1) How to create LVM partitions and create ext3 filesystem 2) Mount the LVM partition and ISO image 3) Run the partition with Xen as a virtual machine What I need: 1) I need to install Fedora ll file system into an lvm partition (let's say /dev/fedora11) from an ISO image so that I have all the directories /root, /bin, /sys etc etc under /dev/fedora11 Any help would be much appreciated! NOTE: I don't have a monitor for this server, so I need to do it via SSH

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• iPhone apps causing battery to drain out

  - by saurabh

  Hi, Recently my iPhone battery started to discharge in just one day. I do not use my iPhone much (less than 1 hour a day). and then while discussing it with couple of colleagues, I heard that there are some apps which even if installed on your iPhone can cause your battery to drain out faster. It does not matter if you are not using those apps, only having them installed was enough to cause battery drain. I have heard this from couple of my techie friends as well and thus had to put some credibility to it. Being an iPhone developer, I don't think that is possible. Do you think if this is possible for an app to cause battery drain just by being installed there on iPhone?

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• Prebuilt ActiveMQ Server Based off ZeroMQ

  - by VxJasonxV

  Are there any distributions of fully built Message Brokers that are initially based off of ZeroMQ? I had thought that downloading/installing ZeroMQ would give me such, not just a handful of procedures for rolling me own. Currently we use ActiveMQ, but it is a miserable pain to configure, so I'd rather slim down the profile, unfortunately I learned that ZeroMQ was not a one step solution to achieving that goal. Alternatives are ok, but I'd prefer something less overly verbose in configuration than ActiveMQ's ludicrous amounts of Java configuration. Broker config + Java Logger Config + many other intricacies that I don't wish to deal with. (Read: Preferably not Java based in the first place.) I'm looking for reliable, basic functionality described by JMS brokers. Topics, Queues, Message Persistence, etc.

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• How do you enable syslogd to accept incoming connections on Snow Leopard from remote loggers?

  - by Emmel

  How do I get syslogd to accept incoming connections from remote hosts on Snow Leopard? I'd like to centralize logging such that various devices and systems send logs to Snow Leopard's syslogd, which normally hangs out on UDP 514. However, I'm unable to get them to successfully be accepted by good ole syslogd. I tcpdumped on the Snow Leopard box to verify that packets are being spouted to port 514 -- they are. I checked that syslogd is listening on 514 -- it's not. Googling around told me that, on older versions of OSX (don't you love the way things change so rapidly on OSX), one just had to add a flag to the syslogd daemon to allow remote; one did this in com.apple.syslogd.plist. However the syslogd daemon has no flags (at least in its man page) that suggests any remote anything. What's the solution to this? Secondary, less import but relevant question: What's 'newsyslog'? I see a plist file but it's not running (apparently). Thanks

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• Prefix files with the current directory name using Powershell

  - by XST

  I have folders with images (*.png and *.jpg) >C:\Directory\Folder1 01.png 02.png 03.jpg 04.jpg 05.png And I want to rename all the files like this using powershell: >C:\Directory\Folder1 Folder1 - 01.png Folder1 - 02.png Folder1 - 03.jpg Folder1 - 04.jpg Folder1 - 05.png So I came up with this simple line: Get-ChildItem | Where-Object { $_.Extension -eq ".jpg" -or $_.Extension -eq ".png"} | rename-item -newname {$_.Directory.Name +" - " + $_.Name} If I have 35 or less files in the folder, I will have the wanted result, but if there is 36 or more files, I will end up with this: >C:\Directory\Folder1 Folder1Folder1Folder1 - 01.png Folder1Folder1Folder1 - 02.png Folder1Folder1Folder1 - 03.jpg Folder1Folder1Folder1 - 04.jpg Folder1Folder1Folder1 - 05.png The loop stops when the file's name exceeds 248 characters. Any ideas why it's looping?

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• Transfer used ram to swap and free more physical ram

  - by AbuOmar

  I have a vps with 256m physical ram and 512m swap space, I am trying to use a software that need more than 256m and less than 512m ram, so it uses swap. The problem is at some moment of the installation, the installation process checks the available physical ram, it's full (some swap is used), so it pauses the installation and tills that it must be some more ram to continue the installation.. I see that I need to move some of used physical ram to swap while the process is running.. Is there anyway I can do that? or any other solution! For sorry I am using openvz vps, and the vm.swappiness option can't be modified as a solution.

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• rvmsudo foreman export upstart without asking for password

  - by Millisami

  My capistrano deploy.rb has a foreman export command for a rails app on Ubuntu 10.04 So, while deploying, I want to export the foreman to upstart script. But doing that, the command rvmsudo foreman export ... asks for root password and I cannot do anything. Googled a lot and tried with various tweaks but nothing worked. * executing `foreman:export' * executing "cd /home/deploy/zappy/releases/20111019175422 && rvmsudo foreman export upstart /etc/init -a zappy -u deploy -f ./Procfile.production -c worker=1 redis=1 -l /home/deploy/zappy/releases/20111019175422/log/foreman" servers: ["173.255.205.237"] [173.255.205.237] executing command ** [out :: 173.255.205.237] [sudo] password for deploy: What could be the solution to do it password-less way?

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• Disabling horizontal scrolling using mouse wheel

  - by Carlos

  Hello, I am using Windows 7 x64 on an iMac (via BootCamp) with the button-less Magic Mouse that comes with the iMac. I would like to disable the horizontal scrolling that happens when you move slightly the finger horizontally while doing a vertical scrolling. In the Control Panel, Mouse section, Wheel tab, Horizontal Scrolling section, the minimum value that you can enter is 1, not 0. Is there a way (in the Registry) to disable horizontal scrolling using the mouse wheel? Or to set that value to 0 to see if it does the trick? Notice that this is a Windows specific question, not Mac OSX or Apple or Magic Mouse question, it can apply to any mouse in Windows whose wheel supports horizontal scrolling apart from vertical scrolling.

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• Sensei mouse sensitivity

  - by Marcelo

  I've recently acquired a Steelseries Sensei. Despite being a great mouse, I'm having some trouble finding settings that I can get used to... The mouse engine allows me to set a CPI from 0 to 5700. It also allows me to set it even higher, calling it "DCPI" (Double CPI), from 5701 to 11400. On Window's Control Panel, there's a "Pointer Speed" slider and a "Enhance Pointer Precision" checkbox (wording may be different as I use a non-english version). The majority of games allow me to set an in-game "Mouse Sensitivity". Some games let me use a "Raw mouse input". I'm already familiar with the basics of CPI/DPI - "higher CPI means less hand movement", but what are the differences between all those options? Is there a "better" or "worst" setting?

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• Migrated SQL Server database suddenly in "Restoring" state

  - by Pete Montgomery

  Edit: This is still a live prob, less than an hour after trying RESTORE ... WITH RECOVERY. I backed up a SQL Server 2005 database and restored it to a new SQL 2008 instance. The restore was quick and successful. Everything was fine for an hour or so. Suddenly, the database is now stuck in "(Restoring...)" state in Management Studio and has a green arrow icon, and my application login is failing! Any advice? :-) Edit: This is a live application. If I delete and try again, the hour or so's data will be lost.

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• In MySQL 5.1 InnoDB, does the maximum length of a VARCHAR affect secondary index size?

  - by e_tothe_ipi

  Assuming the data is the same either way, does the maximum length of the VARCHAR affect the space usage of a secondary index? Does InnoDB use fixed length records for indexes? Assume that we're talking about MySQL 5.1, with the InnoDB COMPRESSED table format and that the field in question is defined as a VARCHAR with some length less than or equal to 255 (so that it uses only one byte for the offset). Here is the use case: I have a server with a very large table (several gigabytes). One of the fields is currently VARCHAR(7). We need it a little longer and we are thinking of making it VARCHAR(255), but we are worried that it bloat the index.

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• Is there way to use Windows Easy Transfer on Windows Server 2008

  - by CJM

  At work, I'd been experimenting with using Windows Server 2008 as a desktop machine - I'm a s/w developer so some of the server software was particularly appropriate, but back in the day there was a suggestion that Server 2008 would be faster than Vista (mainly because of less bloat). I'm now wanting to move across to a new Windows 7 workstation; not only does Server 2008 not have Windows Easy Transfer, but I can't attack the problem from the Windows 7 end either - when I try to run the migration wizard it claims that the software 'isnt compatible with this version of Windows'. I'd bet that it would work fine, if only it wasn't for the arbitrary version check... Is there any way to coax this software into working? If not, any good alternatives to Windows Easy Transfer - I don't fancy having to manually copy application settings etc across myself...

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• Inexpensive and Open replacement for Cisco Tunnel-based EasyVPN with Cisco VPN 3000 Series

  - by Shoaibi

  I have a scenario when i have to establish peer-to-peer preshared key based VPN to a vendor. This vendor uses Cisco EasyVPN with Cisco VPN 3000 as access concentrator. I check the compatibility of the type of VPN from http://www.cisco.com/en/US/prod/collateral/iosswrel/ps6537/ps6586/ps6635/ps7180/prod_brochure0900aecd80582078.pdf and it appears that it would only work on cisco hardware. I am looking for a less inexpensive and possibly and open replacement to this to save my cost and also recommend to them. I have tried OpenVPN and thinking about vyatta.

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• LVM2 vs MDADM performance

  - by archer

  I've used MDADM + LVM2 on many boxes for quite a while. MDADM was serving for both RAID0 and RAID1 arrays, while LVM2 where used for logical volumes on top of MDADM. Recently I've found that LVM2 could be used w/o MDADM (thus minus one layer, as the result - less overhead) for both mirroring and stripping. However, some guys claims that READ PERFORMANCE on LVM2 for mirrored array is not that fast as for LVM2 (linear) on top of MDADM (RAID1) as LVM2 does not read from 2+ devices at a time, but use 2nd and higher devices in case of 1st device failure. MDADM reads from 2 devices at a time (even in mirrored mode). Who could confirm that?

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• Home ZFS based NAS...What processor/chipset to use?

  - by MrBlargityBlarg

  So, I'm building a home/personal NAS. My plan is to expose both SMB fileshares for sharing files/media between hosts, but also to carve an iSCSI target LUN out of it for use by VMWare as a datastore. I want to use ZFS (software RAID) so that means I'll either be using FreeNAS, Solaris Express, or OpenIndiana. My question is basically: How much horsepower do I need? Obviously I/O is going to be my bottleneck but I want to be sure that I am not limiting my I/O because of a slow processor or chipset. So far the hardware plan is to use an Intel i3 and motherboard with one of the H87, Q87, or Z87 chipsets, a SAS controller (JBOD, no RAID) and if budget allows, I'm also hoping to get an SSD for the ZFS L2ARC and ZIL. Does anyone think I could get away with an Intel Atom or cheaper/less-capable processor/chipset than the i3 and [HQZ]87 listed above?

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• How to get better video quality in Lync?

  - by sinned

  I want to use a ConferenceCam from Logitech to stream talks live via Lync. When I view the RAW webcam image via VLC, the quality is very good (but the latency is high because of buffering). However, when I stream it using Lync, the video gets blurry. Is there a way to ensure QoS in Lync or otherwise improve the video quality to (near-)native? I would rather have some dropped frames than a lower resolution where I can't read the slides. In my setup, I use Lync with an Office365-E3 contract, so I have no Lync-Server in my network. I thought about replacing Lync completely with VLC, but I first want to try Lync because VLC will probably cause firewall issues. Also, I haven't looked up the VLC parameters for less buffering, faster encoding, a bit lower resolution (natively it's more than HD) and streaming.

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• Pure-FTPd linux upload problems - 500 Unknown command

  - by user1801273

  I'm running Centos with Kloxo CP and PureFTPd on VPS based on HyperVM. The problem - during the day, there are periods when FTP wors fine for hours, but sometimes it dies with "500 Unknown command" code. for files larger than 2Kb. This is really weird - with files less than 2472-2484 bytes everything would work fine, but with bigger files ftp would start writing file, would drop on 2Kb and would return "500 Unknown command" . This happens on Passive AND/OR Active connections for any filetypes. Logs are showing like the file was uploaded successfully , but the speed nearby the action would be 0.3 -0.5 Kb , when normal operation would report 70-150Kb/s speeds. I do have some Iptables firewalls on both HyperVM host,and VPS , however these are static, and most of the time it works just fine. Any suggestions on where to look for a solution would be appreciated :)

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• page allocation failure - am I running out of memory?

  - by mfriedman

  Lately I've noticing entries like this one in the kern.log of one of my servers: Feb 16 00:24:05 aramis kernel: swapper: page allocation failure. order:0, mode:0x20 This is what I'd like to know: What exactly does that message mean? Is my server running out of memory? The swap usage is quite low (less than 10%), and so far I haven't noticed any processes being killed because of lack of memory. Additional information: The server is a Xen instance (DomU) running Debian 6.0 It has 512 MB of RAM and a 512 MB swap partition CPU load inside the virtual machine shows an average of 0.25

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• SmartSVN - Unable to create new repository profile

  - by Sandeepan Nath

  I have just installed SmartSVN on this fedora system. The application starts (on running ./smartsvn.sh) with its usual UI but many things are not working. Creating New repository profile Trying to create a new repository profile (Repositories- Repository Profiles- Add) An Error occurred while processing an SVN command - Cannot connect to 'svn+ssh://192.168.0.103': There was a problem while connecting to 192.168.0.103:22 Quick Checkout Trying to do Quick Checkout (less configuration) An Error occurred while processing an SVN command - Malformed XML. Some Observations When I run the smartsvn.sh file like this:- ./smartsvn.sh It shows this in the console - Warning: /bin/java does not exist Could not lock /root/.smartsvn/_lock_ Switched to running instance I was using SmartSVN in another system before this where it was working. There too, it was showing the warning like Warning: /bin/java does not exist but this part was not showing:- Could not lock /root/.smartsvn/_lock_ Switched to running instance I have only JRE installed in both the systems and not JDK. So, what could be the reason? Any pointers? Thanks, Sandeepan

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