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• Software/hardware to build video streaming server?

  - by Sasha Yanovets

  I am looking for a video streaming server solution, something like online TV server, with ability to make live broadcasts in the internet. What software could you recommend for that? What kind of hardware it should run on, should be there anything special? I am looking for a solution that could be scaled up to at least 1000 simultaneous users online with good resolution of video. I think it is good to have general answer on what direction to choose. But here more details on my specific case: I just looking for a solution almost from scratch. We have some video content that we've produced, but it is not delivered over internet yet. We do not tied to any particular vendor for now. We want to make 24 hours of steaming three 8 hour blocks with change of content every day. We want the ability to make regular live broadcasts. I guess we will need to have several options of streaming quality (low ~56 kb/s mid ~273 kb/s). Some terms just foreign to me (like play-truncation rate), if you could point out what parameters we should avare of, it would be great. Uplink to the internet is to be determined. We plan to start from something and scale up on the way. If you are already have some kind of media streaming server, just describe its configuration here (hardware, OS, software), peak number of concurrent users it serves. I think it could help people approaching this task.

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• How can I get around windows 8.1 store (& metro apps) not working with UAC disabled

  - by Enigma

  I have UAC disabled because it is annoying and causes more problems that it could ever possibly solve, at least for me. Here is yet another problem, and it seems to be due to a recent update as I don't remember it in the past. Even with a MS account, I can't use the store because UAC is disabled. How can I get around this? Short term I can just enable it, reboot, use store, disable it, reboot and be on my way but there has to be a better way (other than MS getting their software completely right - like that will happen anytime, ever) Edit: Apparently this is far more of an issue than I originally thought. Now every(?)many metro apps requires UAC. Anyone aware of the update this got rolled in with? Thankfully netflix isn't affected which is the only metro app I use at the moment. What I see: Event Log info: Activation of app winstore_cw5n1h2txyewy!Windows.Store failed with error: This app can't be activated when UAC is disabled. See the Microsoft-Windows-TWinUI/Operational log for additional information.

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• need to bring back win 7

  - by user290513

  I like making music and playing games and occasionally do some Photoshop. I had a windows 8 computer but my mouse pointer always got stuck, so to try out something new I installed Ubuntu. here is how I installed it: Went to advanced statup options clicked on "use a device" after plugging in my bootable USB with Ubuntu replaced my windows 8 and installed Ubuntu 14.04 LTS I hope I did it correctly though. So after a few months I could've really find out a good Audio Production (not LMMS, because I use Stagelight) software nor something that could be familiar to the UI of Photoshop. So I decided to bring back Windows, but because of the bad experience of 8 I thought about bringing back win 7 So I used an app named WinUSB to make my bootable USB drive after formatting it to NTFS in GParted But when I go to my grub menu, my USB doesn't show up and my PC being a UEFI device. I don't know how to get to the bios of my device. Can somebody tell how to install Windows 7 completely and deleting Ubuntu or at least give me a link to a tutorial. I have a netbook: it is an Acer Aspire One 725. I'm fine with using commands in terminal and another thing that my laptop doesn't have a CD drive or reader, I can't put a CD inside

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• Certain websites redirect to 127.0.0.1. How do I fix this?

  - by Dian

  Facebook and Youtube in particular. Tried nslookup the address shows as 127.0.0.1. Checked the HOSTS file, it's fine. Ran Malwarebytes' Anti-Malware (didn't find any problems) and SpyBot Search and Destroy (found 1 problem). (Not sure if the Spybot made this improvement) now pinging youtube shows the correct address (74.125.71.91) but the browser still says: Connection to 127.0.0.1 Failed The system returned: (111) Connection refused Tried ipconfig /flushdns but there are no changes. Switched to another user but the results are the same. hosts file: # Copyright (c) 1993-2009 Microsoft Corp. # # This is a sample HOSTS file used by Microsoft TCP/IP for Windows. # # This file contains the mappings of IP addresses to host names. Each # entry should be kept on an individual line. The IP address should # be placed in the first column followed by the corresponding host name. # The IP address and the host name should be separated by at least one # space. # # Additionally, comments (such as these) may be inserted on individual # lines or following the machine name denoted by a '#' symbol. # # For example: # # 102.54.94.97 rhino.acme.com # source server # 38.25.63.10 x.acme.com # x client host # localhost name resolution is handled within DNS itself. # 127.0.0.1 localhost # ::1 localhost ipconfig all: Connection-specific DNS Suffix: DNS Servers: 10.1.1.30 208.67.220.220

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• Are there any tools to migrate your files, applications, and settings to a new Windows computer?

  - by calbar

  I've decided to upgrade my laptop on a regular basis and one of my main concerns is recreating my entire Windows 7 environment every time I do this. I'm talking toolbar positions, login settings, start menu items, applications and all their customizations... everything but my drivers. It literally takes weeks to fully recreate my working environment, not to mention the risk of user error or just simply forgetting "how I liked it." I'm assuming I won't find something as painless as Apple's Migration Assistant for Windows, but maybe there's something out there that can at least package up your apps and their settings? Bonus points if you can point it to your personal files, too - whatever's the quickest way to get from one machine to the next. I intend to install Windows fresh to remove bloatware on every machine that I buy, then selectively install the drivers I need. Something that accommodates loading my old apps into this newly prepared environment would be ideal. One random point of concern is in regard to application settings that refer to old hardware. I'm not sure if there's anything that can be done about this. If you have any thoughts, feel free to share. Thanks for your help!

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• Assigning cores to VM in vSphere

  - by user114933

  Complete vSphere newbie here... Background: So, I have a 12 core machine with 24 VMs on it. Currently, all the processing power is shared between these VMs equally. The question: Can I configure one VM to be given two CPU's worth processing no matter what's happening on the other machines? My Research: I tried two things in vSphere... I set the reservation and limit on one VM to equal the same as two cores. To test if my objective was being reached, I measured the time it would take to gzip a file when other VMs were running nothing and when other VMs were running CPU intensive operations. I expected the time to gzip the file would be the same because this VM gets priority for some processing. Unfortunately, the time taken to gzip the file when other VMs were running something was significantly more than when other VMs were not running anything. I tried setting the Hyperthreaded Core Sharing mode to Internal hoping that this would mean that my VM would get at least an entire core to itself. This did not work either. Thanks in advance!

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• Windows disk change monitoring for malware analysis

  - by SuperDuck

  Not sure if this question belongs to here, because it has some relations with 'serverfault' (system backups) and 'stackoverflow' (software analysis). I'm looking for a solution to monitor disk changes on a Windows system and selectively revert them. It should be able to handle live files like registry parts, so may need to be an offline backup software. It shouldn't silently pass over files which the current admin user doesn't have permissions on (files with no permission entries or owned by the 'system' user) Registry change tracking would be a bonus but is not a requirement I use virtual machines for malware analysis, there is even no solution to list file changes in disk snapshot files (delta VMDK). I currently use Ashampoo for monitoring changes. Though it's the best one between similars, it's not a good software and hasn't really evolved in many 'platinum', 'deluxe' versions released in the last 10 years (it even used non-resizable windows until the latest version). The real problem is it misses some disk / registry changes. Perhaps it only compares modification dates and doesn't catch a change if the dates are preserved. So, I think the solution should compare files using hashes, or file sizes at least. There are numerous backup software out there and I'm sure one can handle this, offline or online.

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• Connecting to SVN server from a computer outside of my LAN

  - by Tom Auger

  I've got a Fedora server running Subversion and svnserve on port 3690. My repo is at /var/svn/project_name. I have my router forwarding port 3690 to the local server (as well as port 80, 21, 22 and a few others). When I connect locally to svn://192.168.0.2/project_name it works great. When I connect from an external server to svn://my.static.ip/project_name I get a time out connecting to the host. However, if I http://my.static.ip there is no problem, so port forwarding is working (at least for port 80). I don't want to run WebDAV or svn via HTTP/s. I'd like it to work using svnserve, as documented in the svn book. What have I misconfigured? EDIT Here is the last part of my iptables dump. I'm not an expert, but it looks OK to me: ACCEPT tcp -- anywhere anywhere state NEW tcp dpt:svn ACCEPT udp -- anywhere anywhere state NEW udp dpt:svn ACCEPT tcp -- anywhere anywhere state NEW tcp dpts:6680:6699 ACCEPT udp -- anywhere anywhere state NEW udp dpts:6680:6699 REJECT all -- anywhere anywhere reject-with icmp-host-prohibited EDIT 2 Results from sudo netstat -tulpn tcp 0 0 0.0.0.0:3690 0.0.0.0:* LISTEN 1455/svnserve

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• Can not boot windows XP from cloned hard disk - what can I do?

  - by Martin

  My configuration: a PC (some years old) with MSI K8N-Neo-4F Motherboard, 1 GB RAM. Disk 1 (Maxtor, SATA II, 250 GB): 2 Partitions, on Partition 1 (48 GB): Windows XP Professional (NTFS) on Partition 2 (190 GB): data (NTFS) I wanted to have a larger and faster disk (the PC is incredibly slow and permanently the disk is rattling when I try to open an application or during Windows startup), so I took Disk 2 (Seagate, Sata II, 500 GB), installed in the PC, created at first a 400 GB-partition at the end of the disk and cloned the data to it, which worked well Installed a swap partition and a partition for Ubuntu Linux 12.10 on the first "part" of the disk so I was able to boot Linux and the old Windows XP with the Linux "System selection" at startup. Now I wanted to move Windows XP to the new disk, deleted the Linux partitions cloned Windows XP to the new disk (with free tools - EASESUS), left both disks in the PC and tried to select the new hard drive during boot as boot partition. This did not work, the PC refused to boot from this second disk. I tried many things like making the boot partition on the 2nd drive "active" in the Windows System Preferences modifying the boot.ini file to boot from the second disk - tried to boot from it, but ended with an error message stating that it was not possible to boot from this disk because of a hardware failure or something else or so removing the original disk and plugging the new one on the same SATA port as the original one - also booting failed with an error message repairing the MBR by booting into recovery mode from the Windows XP Installation CD-ROM, selecting the second disk and doing "FIXMBR" which said that everything was fine with the MBR. after that at least the PC tried to boot from the newer disk and then startup was hanging during the blue screen with the Windows Logo.... no luck. ... deleting the cloned partition and cloning again - this time with Macrium Reflect Free version... - no success during booting. I tried a lot of things with no success, so I wonder what I am doing wrong?! What could I do to successfully clone my Win XP partition to replace the original disk by a larger one which is bootable.

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• Why is XSP/mono giving me file/write errors with lucence?

  - by acidzombie24

  I am using mono 2.6.7, xsp 2.8.? and i am not sure what else. I'll try downgrading xsp and whatever else. Today i notice my server randomly gets Http Error 500, internal server error. I looked in my log files http://www.pastie.org/1426236 and it appears that the problem is locking lucence which it does by creating a file called write.lock. This use to work with no problem but now it gives me pain. It will fix itself if i refresh the page several times but it will break just as easily. My other site will not work everytime i restart apache and i need to by hand delete the file (at least it doesnt get random 500 errors). However now it just says Lock obtain timed out: NativeFSLock@/var/www/SITE_2/App_Data/LuceneIndex_a/write.lock no matter what. I even chmod -R 777 the directory and still no luck. write.lock doesnt even exist. I have no clue whats going on. Any ideas?

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• How to verify TRIM/discard on encrypted swap?

  - by svarni

  I am using an encrypted swap partition via ecryptfs-setup-swap on my Ubuntu 13.04 computer using a SSD. I have manually set up trim for my ext4 root partition (simply by adding the "discard" option in /etc/fstab). I also manually ran fstrim on the root partition prior to booting and using dstat I saw that for a few seconds several GB/s of data have been written to the disk. That was presumably the effect of the trim command. These high writerates are reproducable by deleting huge files and have not occured before setting up trim, so I take them as evidence for working trim/discard. Manually enabling trim on my root partition has stopped the wearout of my precious new disk from 365 used reserved blocks (out of 6176 total) within three months down to 0 additional used reserved blocks within three additional months (data from SMART attributes). Because I want to minimize the wearout of my SSD I now would like to know whether my swap partition (which is encrypted using ecryptfs-setup-swap) also makes use of the trim/discard option. I tried sudo swapon -d -v /dev/mapper/cryptswap1 but did not receive particular information ("-v") about whether trim/discard ("-d") was applied. If unsupported, i would expect a message. Then I tried sudo dd if=/dev/sda6 count=1 BS=1M | xxd | less directly after booting and when no swapspace was used but I saw not only zeroes. I assume, when looking at freshly trimmed regions, the disk would send zeroes instead of reading random sectors (and according to some forums, (unencrypted) swap space is trimmed once upon boot). Long story short: Are there any ideas on how to test if trim is effectively used for my encrypted swap? And if not, any ideas on how to - at least manually, for once - trim the whole swap space? I wouldn't want to tinker with the partition itself, because I dont know if it needs to be reinitialized as (encrypted) swap - I dont want to be left with an unbootable system :)

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• 85 Hz on old/new driver looks the same like 75 Hz on previous one?

  - by jon

  I have old philips 107T5 CRT and Nvidia graphics card. I used old Nvidia driver (but it wasn't 'legacy' one when I installed it) for few years but recently I decided to install other Linux distribution. I used 75 Hz refresh rate and 1024x768 resolution on my previous distribution. After I installed the new distribution I had to install a Nvidia driver so I downloaded one from the Nvidia site (this time only legacy supported my card so I downloaded legacy and installed it). It wasn't automatically updating xorg.conf but I had my previous xorg.conf copy and I used it. When I run X I could only choose 85 and 75 Hz, 85 was checked as default. And now what shocks me: that default 85 Hz looks identically like 75 Hz on previous driver looked (at least to me). I tried 75 Hz out of curiosity and it's too bright, hurts, etc. But on the previous driver 75 Hz wasn't hurting my eyes. Why is it different? It's the same number after all, so it should always give the same results, right? That's my first question. Second question: Is 85 Hz OK for that monitor model? Would it break it? I tried to find the optimal refresh rate for this model but couldn't find it.

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• Simple, centralized user management on a small LAN - NIS or LDAP?

  - by einpoklum

  I'm setting up a small LAN for my team. It will, for all intents and purposes, not be connected to any external networks. I would it to have centralized control of user accounts (at least, I think I'd like that; I'm also considering using puppet, so theoretically I could just push /etc/passwd changes, or something). The number of machines is fixed, but not very small. Mostly they're 'attached' to a single user, but sometimes people work remotely on someone else's box; and there are a couple of servers. I've read this question, but my scenario is much simpler (even simpler than in this question) and I'd like to do something (relatively) quick, with not much hassle, but not a dirty totally-insecure hack. Is NIS relevant for my scenario? If not, what's the most hassle-free way to set up LDAP (or LDAP+Kerberos) to achieve the same? Notes: I have no experience with setting up either NIS or LDAP. We use Debian-flavored Linux distributions, mainly Kubuntu 12.04 (not my choice, but that's the way it is).

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• How to safely send newsletters on VPS (SMTP) w/ non-hosted domain as "From" email?

  - by Andy M

  Greetings, I'm trying to understand the safest way to use SMTP. I'm considering purchasing a second virtual server mainly for email sending, on which I will set up PHPlist (a free open-source mailing program), so we have the freedom to send unlimited newsletters (...well, 10,000 per day at least, which requires a VPS rather than shared hosting). Here's my current setup with a paid mass-mailing software: I have a website - let's call it MyHostedDomain.org. I send newsletters with the From / Reply To address as [email protected], which isn't being hosting by me but I have access to the email account. Can I more or less safely set this up with an SMTP server on a VPS? i.e. send messages using [email protected] as the visible address, but having it all go through my VPS SMTP? I cannot authenticate it, right? Is this too risky a practice? Is my only hope to use an address with a domain on the VPS, i.e. [email protected]? I already have a Reverse DNS record for the domain hosted on my current VPS. I also see other suggestions, like SenderID and DKIM. But with all these things combined, will this still work? I don't want to get blacklisted, but the good thing is this is a somewhat private list, and users opt-in to subscribe. So it's a self-made audience. (If it makes you feel better, this is related to a non-profit activity, not some marketing scam...it's for a good cause, I assure you!)

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• Active Directory: Determining DN or OU from log in credentials [closed]

  - by Christopher Broome

  I'm updating a PHP login process to leverage active directory on a Windows server. The logging in process seems pretty straight forward via a "ldap_bind", but I also want to pull some profile information from the AD server (first name, last name, etc...) which seems to require a robust distinguished name (DN). When on the windows server I can grab this via 'dsquery user' on the command prompt, but is there a way to get the same value from just the user's login credentials in PHP? I want to avoid getting a list of hundreds of DNs when on-boarding clients and associating each with one of our users, so any means to programmatically determine this would be preferential. Otherwise, I'll know the domain and host for the request so I can at least set the DC portions of the DN, but the organizational units (OU) seem to be pretty important for querying data. If I can find some of the root level OU values associated with the user I can do a ldap_search and crawl. I browsed through the existing questions and found some similar but nothing that really addressed this, so my apologies if the obvious answer is out there. Thanks for the help.

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• How do I send e-mails with attachments to a Microsoft WebTV user?

  - by Petr 'PePa' Pavel

  my friend uses Microsoft WebTV (e-mail address ends with @webtv.net) and I'd like to send him an e-mail with a picture attached to it. We went through a series of attempts one of which ended up a success, all others a failure. He just can't see my e-mail in his mailbox, when it contains an attachment. E-mails without attachments always go through all right. What seemed to help in the first successful case, was that he added my e-mail address to his address book and my e-mail suddenly showed up. Seemed to have been delivered before but hidden. He kept my address in his address book however, it didn't help with the following trials. He did look into his junk folder, nothing there. I made sure the file name contains no spaces. It's a regular jpeg, named something-like-this.jpg I downsized it to have only about 50k, as I've read somewhere that that's a limit. I actually doubt this piece of information, because I think the successful attempt was larger. webtv.net contains zero information. I watched their video demo for the e-mail client, so I at least know how the user interface looks like. I've never laid my hands on the real thing. I'm an advanced user myself (a programmer) but I can't wrap my mind around this. He on the other hand, is a very technically inexperienced user and because he's half way across the globe, I can't come and look over his shoulder. He doesn't have a computer, afaik there's no way I could see what he sees. Any ideas on how to debug this? Thanks for your time, guys. P.S. I can't tag this "webtv" because such tag doesn't exist yet and my reputation is too low, sorry.

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• Relayout LVM Disk

  - by Tom

  I have an Ubuntu 11.10 system with two 500GB disks. The partition tables look like this: /dev/sda1 primary 465.52GB /dev/sda2 extended 243.17MB -> /dev/sda5 logical 243.14MB /dev/sdb1 primary 465.76GB sda1 and sdb1 are in a single LVM physical volume group containing a single logical volume containing a single logical filesystem which is mounted as /. sda5 is mounted as /boot. The problem comes when I want to upgrade to Ubuntu 12.04, which requires at least 247MB free on /boot. So I need to reduce the size of sda1 so that I can increase the size of sda2 and sda5. How the heck do I do that? I can find how to shrink the logical volume group, but I'm not at all clear on how to clear out the end part of sda1 so that I can reduce the physical volume group. Does pvresize just deal with this automagically? Or is that wild wishful thinking? I guess the alternatives are to back everything up onto something or other and recreate the thing from scratch or find out whether GRUB2 supports using LVM for /boot.

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• CD Drive not discovered

  - by user1009073

  I have a self built computer. it uses a P6T Deluxe motherboard, which has both SATA and IDE ports. This was built several years ago, and had an IDE CD/DVD drive. This drive started going bad (would not burn CDs correctly), so I decided to replace it. I had difficultly finding an IDE DVD drive, so I bought a SATA DVD drive. I opened the comnputer, took out the old DVD drive. I left the IDE cable in place, connected to the motherboard, but it is not connected to any drives. I hooked up the new DVD drive, both power and with a SATA data cable (SATA port 3 if I recall). (Sony Optiarc 24x , Newegg URL: http://www.newegg.com/Product/Product.aspx?Item=N82E16827118067 ) When I power on my computer, the drive does NOT show up in Explorer. I can hit the DVD eject button, and the drive will open up, so I know it at least is getting power. I thought, maybe something in the BIOS. When I go to BIOS, boot devices, it shows (1) floppy, (2) my hard drive (3) ATAPI CD Drive. The only other possible BIOS option I could find was uder 'Storage Configuration'. Configure Storage as: My setting is RAID, since I am using two drives in a RAID configuration. Other options were IDE and ACHI. Other than trying to find an IDE DVD drive, is there anything else I can try? The drive does not show up at all in Windows Explorer. I did put in a CD thinking that might help, but nothing happened. Thanks, GS

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• Windows 7 - SBS - Why does copying a directory not include all subdirectories and files?

  - by indeed005

  Using Windows 7, fully updated... I have had some strange behaviour copying a whole user directory (e.g. "c:\users\bob" to "c:\backups\bob") I understand now that I should have used Easy Transfer or at least robocopy, but at the time all I wanted to do was backup the user's data before using the "Delete account" button. Unfortunately, I didn't check that my copy-paste had actually worked; all it had actually done was copied the appdata subdirectory of the user account. At the time of doing this backup I was logged in as the same user, bob (a local admin) in this example. When I discovered the missing files, I tried again using the domain admin account -- same story. Only appdata copied. No documents folders, nothing else. Then my boss tried, and it worked fine -- it copied all the files. Ctrl+C, Ctrl+V. I tried again... same profile... copied all the files. Same profile, same destination, same rights and permissions, same ownership, but different behaviour. Has anyone encountered this before and come up with a solution? BTW this was not using roaming profiles and the accounts are stored locally.

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• REMOTE_USER not getting set?

  - by landed

  I am trying to setup LDAP Authentication in Joomla using a plugin called JMapMyLDAP (in fact 4 plugins each doing a different job). I need to pull a part of a string out of the server variable REMOTE_USER and this should be visible (we see here http://timplummer.com.au/4-how-to-integrate-joomla-3-with-active-directory-using-ldap.html) in phpinfo(); The issue is that REMOTE_USER is not set or at least not appearing. A few things to note (if you don't mind) here- conceptually I am not really understanding authentication as a whole subject it appears to be vast despite my years working in websites. Yes I used asp and built php pages to check a user is who they say they are with a token(/session?) that was given to just them and then they are identified when a stateless request is made to the server. Thats my level of understanding. This sounds different to the basic authentication in apache where a password sits in a file and a username and the user needs to login to a basic form to get access to the folder/docs this is via an .htaccess file. Ok so with the LDAP to work I need to get REMOTE_USER this sounds very reasonable as how else do we know is making the request. Thank you.

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• How do i play nicely with MS SQL/SQL Server 2008

  - by acidzombie24

  Big problem. I have nearly given up. I am trying to port my prototype to use MS SQL so it will work on a server once i get it (the server will be SQL Server 2008, shared, i dont know any more info). So i tried to connect to SQL Server via visual studios IDE and had no luck. I enabled TCP and named pipes and restarted the service (and computer) with still no luck. I remembered about mdf files so i made that after an obstacle of not being able to make the connect string require i figure out visual studio has it in its properties and successfully connected with that. Then i had a problem with nested transactions. After not being able to figure out how to check i wondered if i can configure it to allow it somehow. I always thought all of MS were the same except for limitations but sql server seems to support nested transactions so theres no point trying to work around the problem with .mdf files since i wont need them and really just used it to port the base of my sql code and to check if syntax is correct. I tried installing SQL Server Management Studio since people mentioned it several times (as a solution or at least help). When installing it on windows 7 it says it may not be compatible. After running it, it launched SQL Server Installation Center (64-bit) which doesnt seem to be the same thing as i dont see a way to modify any of my server (networking) configurations or edit user permissions, etc. I am clueless what to do next. Does anyone have any ideas? I'm posting here bc i think my problem is more configurations and sql server then programming.

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• Multiple Routers, Failover, DHCP and multiple gateways. NOT WAN-failover

  - by u_b

  I've had a look around google and this forum but could not find an answer to my question. So probably one of you can help me a little. My intended setup is: Router R1: wan connection to isp. connected backup server. provides some wireless SSID. other connected devices like printer, laptop, etc. both wired and wireless. Router R2: no wan connection to isp but connected to R2. connects mp3-streamer and music server. also serves as a wireless access point with same SSID. other than described connections only wireless connections. I would like to be able to control music even if R1 is off, e.g. with no internet connection. On the other hand I would like to access internet also in the case that R2 is off, i.e. no music access. Last but not least I would like to stream internet radio, i.e., R1 and R2 are on, and music is streamed from internet to R1 to R2 to streamer. I would like to realize all this using DHCP (also using static assignments) so i do not have to configure statically on android, laptop, etc. So my questions are: Can I make DHCP provide a list of two default gateways R1,R2? In order to make clients fallback to other gateway if currently assigned gateway is turned off? Thanks in advance, u_b

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• Joomla performance problems on AWS

  - by Bobby Jack

  I'm running a site on AWS with the following setup: Single m1.small instance (web server) Single RDS m1.small db Joomla 1.5 Generally, the site is performant, but is fairly low-traffic - say around 50-100 visits / hour. However, at peak time, we see about double that traffic. During peak time, pretty much every day: CPU usage on the web server slowly climbs to 100% CPU usage on the RDS server climbs quite quickly to about 30%, from an average of about 15 Database connections shoot up to about 140, from a normal average of about 2 or 3 The site is then occasionally unreachable, certainly according to pingdom monitoring. Does anyone recognise this behaviour? Can you point me in the right direction to begin investigating? Of course, RDS makes it difficult to do things like slow query logging, so I've started by regularly dumping the mysql process list into a file to see if there's anything I can spot there, but it would be good to have something more concrete to investigate. UPDATE At least, can someone confirm that I'm definitely right in saying that the level of traffic implies the problem must be a specific type of query taking way longer than it should to execute? This would happen if a table gets locked, and many queries need to write to it, right? For this very reason, I've already changed the __session table type to InnoDB.

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• Certificates in SQL Server 2008

  - by Brandi

  I need to implement SSL for transmissions between my application and Sql Server 2008. I am using Windows 7, Sql Server 2008, Sql Server Management Studio, and my application is written in c#. I was trying to follow the MSDN page on creating certificates and this under 'Encrpyt for a specific client', but I got hopelessly confused. I need some baby steps to get further down the road to implementing encryption successfully. First, I don't understand MMC. I see a lot of certificates in there... are these certificates that I should be using for my own encryption or are these being used for things that already exist? Another thing, I assume all these certificates are files are located on my local computer, so why is there a folder called 'Personal'? Second, to avoid the above issue, I did a little experiment with a self-signed assembly. As shown in the MSDN link above, I used SQL executed in SSMS to create a self-signed certificate. Then I used the following connection string to connect: Data Source=myServer;Initial Catalog=myDatabase;User ID=myUser;Password=myPassword;Encrypt=True;TrustServerCertificate=True It connected, worked. Then I deleted the certificate I'd just created and it still worked. Obviously it was never doing anything, but why not? How would I tell if it's actually "working"? I think I may be missing an intermediate step of (somehow?) getting the file off of SSMS and onto the client? I don't know what I'm doing in the least bit, so any help, advice, comments, references you can give me are much appreciated. Thank you in advance. :)

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• Can I charge USB devices from a powered hub that isn't connected to a PC?

  - by Anodyne

  This will probably sound familiar to most of you... In my home, we have a whole bunch of devices that can be charged via USB (two iPhones, a BlackBerry, an iPod Touch, etc ad nauseam). We also have a bunch of USB chargers, each of which has a single USB port on it. I'd like to have something permanently connected to AC power with at least 4 USB ports on it, so we can just plug devices in and don't need to go looking for a free outlet. So here's the question: if I buy a powered USB hub, will that do the job even if I don't connect it to a PC? Ideally if you have a hub that you can personally verify will be suitable, let me know the manufacturer and model :-) Thanks in advance! EDIT: The solution I eventually went for was this: Kensington 4-Port USB Charger for Mobile Devices (Europe) There's also a US version here: Kensington 4-Port USB Charger for Mobile Devices (USA) It arrived yesterday, so I used it to charge the following devices, all at the same time, overnight last night: 32GB iPhone 3GS 16GB iPhone 3G First-generation iPod Touch Kensington Portable Power Pack for Mobile Devices I can't say anything about the charging speed (as I left it overnight) but all devices were fully charged this morning.

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