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  • Self-connecting printers

    - by Martin Cerny
    Hello, I work as an administrator in a small company using XP Professional on all computers and two servers with Win 2003 Server. Recently a very unusual problam occured one of the computers keeps connecting to all the printers on the network it doesn't matter if it's an administrator or Domain User as soon as somebody logs in the commputer connects all the printers. The printers are either installed on local computers or on the server and shared. There is no log-on script connecting the printers, I install them manualy and none of the other computers shows such behaviour. We have a printer which is installed on two computers and both of them share it (I'm moving it to Server from a small PC which shared it up to now, but some computers still use the old connection), meaning this specific computer connects to one of the printer two times and it can't use either of the connections. How to prevent this self-connecting to all printers (none of the other computers has this problem). If I delte them from the "Printers" folder everything works fine untill I reconnect and the Folder is once again full of all the printers we have. I solved the smaller problem, computer is now capable of printing on all of the printers (it seems there have been some registry issues), after cleaning the registry and reinstalling the printer it seems to work just fine. But the second thing prevails, the computer connects to all the printers in the network (when I remove one/multiple it is reconnected right after the next log-in by any user).

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  • Does IIS Sometimes Allocate More Worker Processes Than Configured?

    - by Paul Williams
    We have an IIS 7.5 web service on Windows Server 2008 that handles WCF requests from C# clients. This service is configured to have Maximum Worker Processes = 1, so it is not a web garden. IIS is setup to recycle itself at the same time every day (3 AM). I am trying to debug gnarly connection issues, so I wanted to be sure the application pool was not recycling itself. I configured the pool to log an event when it recycles itself. To my surprise, I see the following entries in the System event log: Level: Information Date/Time: 3/23/2012 3:00:00 AM - Source: WAS - Event ID: 5076 A worker process with process id of '6636' serving application pool 'MyAppPool' has requested a recycle because it reached its scheduled recycle time. Level: Information Date/Time: 3/23/2012 2:59:39 AM - Source: WAS - Event ID: 5076 A worker process with process id of '9364' serving application pool 'MyAppPool' has requested a recycle because it reached its scheduled recycle time. IIS is correctly recycling the application pool at 3 AM. However, I do not understand why I would be getting two recycle events in the log within a few seconds of each other. The maximum number of processes is 1. Does IIS sometimes allocate multiple processes for an application pool that is specified as having 1 process? -- edit -- I connected at about 4 PM today and only saw 1 w3wp.exe process. There are no other event log entries that would indicate a crash.

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  • Windows Server 2008 can't start postgresql-x64-9.0 service: could not create any TCP/IP sockets

    - by Rob
    After rebooting a Windows Server 2008 machine to apply system updates, we recently we began having some issues running PostgreSQL 9.0. When we noticed the problem, we reverted the Windows updates, but the issue persists: From services.msc, attempting to start the postgresql-x64-9.0 service fails. Half-way through starting the progress bar becomes very slow, and eventually responds with error 1053; "the service did not respond in a timely fashion." Interestingly enough, bringing up the task manager shows multiple instances of postgres.exe have been started, and looking at the log file shows: 2011-02-10 14:44:02 ESTLOG: database system is ready to accept connections I then tried killing the processes, and starting via the command-line (as the user postgres), but I receive a different error: C:/Program Files/PostgreSQL/9.0/bin/pg_ctl.exe start -N "postgresql-x64-9.0" -D "F:/SHARE/postgres" -w waiting for server to start............................................................... pg_ctl: could not start server ESTWARNING: could not create listen socket for "192.168.0.101" ESTFATAL: could not create any TCP/IP sockets The log file again indicates that the database is ready to accept connections. Also, using netstat indicates that no other processes are using port 5432; I can't think of any other obvious reason that opening the listen socket might fail. Any help would be greatly appreciated.

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  • Why does my Belkin Play router regularly stop working for a few minutes at a time?

    - by YeahStu
    I recently purchased a Belking Play dual-band router for my home. About every few hours, the router stops working or "cuts out" for several minutes before coming back online automatically. My old one did this as well. I figured out a main problem was my wireless home phone, which sends a 2.4GHz signal. Anytime someone would call the phone, my router would get interrupted. Therefore, I unplugged this phone and got a wired phone. Unfortunately, my wired phone has the same problem. Therefore, I unplugged the wired phone. Unfortunately, my router still has regular issues. I live in a home with neighbors within close proximity to me, so it might be possible that their devices are the ones causing me problems. How can I determine what is causing my router problems? I thought that the point of a dual-band router was that if a signal was interfering on one band then it would be uninterrupted on another. However, it seems that is not the case. Does anyone have any tips on how to troubleshoot this or any knowledge you can share to properly set my expectations?

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  • How to make the ec2 ami work on the Xen on Debian

    - by user67103
    Hi. Here is the scenario. We are creating a cloud App. We have a Debian on which we create a customized image and upload it to the Amazon EC2. After uploading it to the cloud we have made some more customizations and are trying to rebundle it. We are facing some issues in rebundling it. We would like to know if we could do something like this. a. Create an AMI Image on Debian b. Load it on to the Xen Hypervisor which would be over the Debian c. Customize the image d. Save the customized image e. Upload it to EC2. The issue is that I am unable to find a proper solution on how to install Xen on Debian and will the AMI on Xen work on EC2. Any suggestions/Help would be greatly appreciated. thanks. Krishna

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  • MS Dynamics CRM users disappear

    - by Max Kosyakov
    Recently we came across quite a weird issue. The administrators say that once in a while they notice that user accounts in MS Dynamics CRM are lost . When a new user is added to the system, the administrators add him/her to the Active Directory first. Then, they go to Dynamics CRM interface, then to system configuration -> administration -> users and add the new user to the CRM, add roles to this user, grant them relevant permissions. Then the user is able to use a custom application, which connects to the Dynamics CRM via WCF. After a while (few weeks or months) the user is unable to use the custom application because Dynamics CRM cannot authorise this user. When administrators open the Dynamics CRM user management interface (configuration -> administration -> users ) and browse through the list of CRM users they cannot find the user in the list. When they try to add the user to Dynamics CRM back, the CRM fails with the error message "User already exists". Moreover, the user still exists in the Active Directory. The admins are very sure the user had been added to the CRM before he/she started to work. The only fact the the user was able to use the custom application normally says that the user had been indeed registered in the CRM. How come the user is not listed in the CRM user management interface at all? Have anyone faced any issues like that? Seen or heard of disappearing CRM users somewhere? Any help is appreciated. Where can one start digging?

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  • Windows VPN for remote site connection drawbacks

    - by Damo
    I'm looking for some thoughts on a particular way of setting up a estate of machines. We have a requirement to install machines into unmanned, remote locations. These machines will auto login and perform tasks controlled from a central server. In order to manage patching, AV, updates etc I want these machines to be joined to a dedicated domain for this estate. Some of the locations will only have 3G connectivity (via other hardware), others will be located on customer premises in internal networks. The central server (of ours) and the Domain Controller will be on a public WAN. I see two ways of facilitating this. Install a router at each location and have a site to site VPN between the remove device and the data centre where the servers are location Have the remote machine dial up and authenticate via a Windows VPN connection to the DC via RAS Option one is more costly to setup and has a higher operational cost. It also offers better diagnostics if the remote PC goes down. Option two works well but is solely dependent on the VPN connection been made before any communication can be made to the remote machine. In a simple test, I can got a Windows 7 machine to dial a VPN prior to authentication to a domain, then automatically login to the machine using domain credentials. If the VPN connection drops, it redials. I can also create a timed task to auto connect every hour in case of other issues. I'd like to know, why (if at all) is operating a remote network of devices which are located in various out of band locations in this way a bad idea? Consider 300-400 remote machines all at different sites. I'd rather have 400 VPN connections to a 2008 server than 400 routers, however I'd like to know other opinions on this.

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  • Application runs fine manually but fails as a scheduled task

    - by user42540
    I wasn't sure if this should go here or on stackoverflow. I have an application that loads some files from a network share (the input folder), extracts certain data from them and saves new files (zips them with SharpZLib) on a different network share (output folder). This application runs fine when you open it directly, but when it is set to a scheduled task, it fails in numerous places. This application is scheduled on a Win 2003 server. Let me say right off the bat, the scheduled task is set to use the same login account that I am currently logged in with, so it's not because it's using the LocalSystem account. Something else is going on here. Originally, the application was assigning a drive letter to the input folder using WNetGetConnectionA(). I don't remember why this was done, someone else on our team did that and she's gone now. I think there was some issue with using the WinZip command line with a UNC path. I switched from the WinZip command line utility to using SharpZLib because there were other issues with using the WinZip command line. Anyway, the application failed when trying to assign a drive letter with the error "connection already established." That wasn't true and even after trying WNetCancelConnection(), it still didn't work. Then I decided to just map the drive manually on the server. Then when the app calls Directory.Exists(inputFolderPath) it returns false, even though it does exist. So, for whatever reason, I cannot read this directory from within the application. I can manually navigate to this folder in Windows Explorer and open files. The app log file shows that the user executing it on the schedule is the user I expect, not LocalSystem. Any ideas?

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  • Why does running "$ sudo chmod -R 664 . " cause me to get access denied on all affected directories?

    - by Codemonkey
    I have a project folder which has messy permissions on all files. I've had the bad tendency of setting everything to octal permissions 777 because it solved all non security related issues. Then FTP uploads, files created by text editors etc. has their own set of permissions making everything a mess. I've decided to take myself together and start using the permissions the way they were meant to be used. I figured 664 was a good default for all my files and folders, and I'd just remove permissions for others on private files, and add +x for executable files. The second I changed my project folder to 664 however: $ sudo chmod -R 664 . $ ls ls: cannot open directory .: Permission denied Which makes no sense to me. I have read/write permissions, and I'm the owner of the project folder. The leftmost part of ls -l in my project folder looks like this: -rw-rw-r-- 1 codemonkey codemonkey ... drw-rw-r-- 5 codemonkey codemonkey ... -rw-rw-r-- 1 codemonkey codemonkey ... -rw-rw-r-- 1 codemonkey codemonkey ... drw-rw-r-- 3 codemonkey codemonkey ... -rw-rw-r-- 1 codemonkey codemonkey ... -rw-rw-r-- 1 codemonkey codemonkey ... -rw-rw-r-- 1 codemonkey codemonkey ... drw-rw-r-- 4 codemonkey codemonkey ... drw-rw-r-- 5 codemonkey codemonkey ... I assume this has something to do with the permissions on the directories, but what?

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  • Alienware Aurora R2 Slow Boot Up

    - by James R
    I have an Aurora R2 bought a few years ago, and recently I decided a RAM update and new Samsung SSD would be good for speed. So now it's super fast, with the exception of booting up. It still takes good 2 minutes to get past the first splash screen on the BIOS, it's only the BIOS, after that it's like lightning. I've Googled the issue, and the usual problem is the BIOS trying to boot from anything it can, with the fix being to change the boot menu. However I've changed it now, and it's still slow. When I disconnect the USB devices it speeds up, but I can't do that every time I want to boot the PC up! The only other option I can think of is upgrading the BIOS, however it seems that A04 is the recommended on for Aurora R2s, so I don't know if upgrading the BIOS could cause issues, especially not if it doesn't solve the issue. Also, when I disable my original hard drive in the boot menu, the PC won't boot up. Despite the Samsung one being fine to boot from, and the original not being needed as far as I know for starting Windows, it gives me an error message and makes me restart the PC, with a new boot configuration (with the original drive as second choice). Any ideas on how to make the BIOS boot faster? And why I need to have my original drive in the boot menu?

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  • VMM 2012 Adding Hosts in Trusted Forest

    - by Steve Evans
    I have two forests with a two way trust between them. VMM 2012 sits in ForestA and I can discover hosts in ForestA with no issue. When I try to discover hosts in ForestB I hit one of two issues: If I go through the GUI or use Powershell just like I normally do I get the following error on the job: Error (10407) Virtual Machine Manager could not query Active Directory Domain Services. Recommended Action Verify that the domain name and the credentials, if provided, are correct and then try the operation again. It doesn't matter which account I use. I've tried accounts from both forests, with Admin/Domain Admin permissions all over the place, etc Going through the GUI (can't find the switch in Powershell to duplicate this), I check the box "Skip AD Verification" and it causes the GUI to crash during discovery. I found an article (http://technet.microsoft.com/en-us/library/gg610641.aspx) that describes how to add a host in a disjoint namespace (even though that doesn't apply to me) and it says that VMM creates an SPN if one does not exist. So I verified that the correct SPN's exist in ForestB, that did not help the issue. I have a case open with PSS but they are stuck. I have VMM traces if anyone would like to see them. Any suggestions or ideas?

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  • VPS to replace MobileMe or Google Apps.

    - by Alex
    All, Yes, this has been touched on in other questions, but I can't find something similar enough. I currently have Google Apps hosting personal email, calendars, contacts, etc. I do like the other google services, but they're outside of Apps. One of the little google irritations that I have to maintain a separate account for Picassa, etc. So, I'm thinking about moving myself away from Google, but purely for personal, privacy type issues. Do I really like the ads, the email snooping, etc? I've had, and liked MobileMe, back when it was iTools, and then .Mac, but it doesn't offer that much really. How easily can I replicate it all on a VPS? I don't want to host it myself at home, I'd lose all the wonderful datacenter goodness. THis isn't about personal geekery in my own basement, just about taking a little control back from Google. So, email is fine running an IMAP server, a nice front-end, etc. What about Calendars and Contacts? And, how easily can it be setup to sync to the desktop and iPhone? Thanks.

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  • EC2 instances keep becoming inaccessible via SSH, can I use elastic loadbalancer to check SSH connectivity?

    - by Rick
    This is mainly an issue for my development ec2 server as it seems that my instance keeps becoming inaccessible via SSH. It happened yesterday so I killed that one and started a new one and happened again later today. The server still works, my web application is accessible in a web browser but whenever I try to connect via SSH I get a pemrission denied (public key) error message in my terminal. I am 100% sure I am doing nothing wrong as I can create a new instance of the exact same AMI (its a personal custom AMI), change absolutely nothing, including using the same .pem key, and then am able to SSH into that new instance using the exact same command as before (just changing the IP address). I understand that ec2 can have issues but having this happen every day seems a bit odd.. I am using an m2.xlarge instance so I don't know if these tend to be unstable, in the past I have used a small instance and had it running for months with no problems which is why I find this so odd. I am looking into using loadbalancing but it seems the only "health" checks they offer is for http or tcp so I'm not sure if I can make it monitor for SSH connectivity. This is important for development as I may make 1-2 new pushes of an application a day and use SSH to do this. I have a designer that needs to have the app always accessible as he works with the front-end files to test output with the live application. Anyways, any advice / info is appreciated

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  • Port 5357 TCP on Windows 7 professional 64 bit?

    - by Registered
    Is there a reason this port is open, a quick Nmap scan and Nessus scan reveal it's open, why? Are there any ramifications if I close this port via the firewall rule set? Or does anyone here now more info about this port besides Google? WTF? 1)http://www.symantec.com/connect/blogs/who-left-tunnel-door-open-windows-firewall-vista-0 I know the talk is about Vista, but I am pretty sure it's the same port on 7, also. 2)Port 5357 common errors:The port is vulnerable to info leak problems allowing it to be accessed remotely by malicious authors. (Web Services for Devices) I am blocking this crap, if I have issues will just re-enable. Damn windows. Inbound rule for Network Discovery to allow WSDAPI Events via Function Discovery. [TCP 5357] You just got blocked, until I break something, will see. Time to re-Nmap and re-Nessus. Nmap scan 0 open ports after closing Port 5357,Win7 still works for now, one more scan with Nessus just to make sure all is well.

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  • Ubuntu networking issue: two specific machines cannot browse web while connected to network at the same time.

    - by jensendarren
    I have setup a secure wireless network which works very well except for two laptops running Ubuntu 10.10 that can't access the Internet via a browser at the same time. They can both ping sites, wget sites, use skype but when using a browser the page never loads (in Firefox the status bar just sits there saying "Connecting" until it times out.) Here is what we have tried so far (nothing has fixed this issue): OpenDNS Restart networking services Using wired connection rather than wireless Removing all other nodes from the network except the two machines that have this issue Swapped out the router Factory reset the router Reformatted one of the machines and re-installed Ubuntu 10.10 Other things that we have checked: The two machines can connect simultaneously without any issues to other wireless networks in different locations (say in an Internet Cafe or another office) The two machines have unique IP addresses The two machines have unique MAC addresses The two machines can communicate on the network using Skype, wget, ping etc We are not using a proxy on either machine FYI: I have attached output from wireshark. For the test we turned both machines on and pointed them both to the same website. The content loaded on one and not the other. Here is the output from wireshark- (speedyshare.com/files/26228631/machine_output_1 && speedyshare.com/files/26228649/machine2). As you can see the first one worked, the second one didn't. I don't fully understand the output and would appreciate if someone could shed some light on what might be causing this and how we can fix it! Many thanks! Darren

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  • Very high-pitched noise when computer does something intense?

    - by Starkers
    "Intense" is the best word I can use to describe it because I'm not sure what it is, whether it's RAM, GPU or CPU. If I pan the camera in unity: A high pitched noise issues from the computer. The picosecond I start panning the sound starts. Stops the picosecond I stop panning. If I start an infinite loop: 2.0.0p247 :016 > x = 1 => 1 2.0.0p247 :017 > while x < 2 do 2.0.0p247 :018 > puts 'huzzah!' 2.0.0p247 :019?> end huzzah! huzzah! huzzah! An identical high pitched noise can be heard. I don't think it's the GPU due to this simple experiment. Or any monitor-weirdness (although the sound does sound like one of those old CRT monitors if you're old enough to be young when those things were about) The CPU? Or maybe my SSD? It's my first SSD and the first time I've heard this noise. Should I be worried? Regardless, what's causing this sound? I can't think what would cause such high frequency vibrations. I built the PC myself. Not enough heat paste on the CPU? Too much? Just no idea what's going on. Info: CPU Type QuadCore Intel Core i5-3570K, 3800 MHz (38 x 100) Motherboard Name Asus Maximus V Extreme Flash Memory Type Samsung 21nm TLC NAND Video Adapter Asus HD7770

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  • EFS Remote Encryption

    - by Apoulet
    We have been trying to setup EFS across our domain. Unfortunately Reading/Writing file over network share does not work, we get an "Access Denied" error. Another worrying fact is that I managed to get it working for 1 machine but no other would work. The machines are all Windows 2008R2, running as VM under ESXi host. According to: http://technet.microsoft.com/en-us/library/bb457116.aspx#EHAA We setup the involved machine to be trusted for delegation The user are not restricted and can be trusted for delegation. The users have logged-in on both side and can read/write encrypted files without issues locally. I enabled Kerberos logging in the registry and this is the relevant logs that I get on the machine that has the encrypted files. In order for all certificate that the user possess (Only Key Name changes): Event ID 5058: Audit Success, "Other System Events" Key file operation. Subject: Security ID: {MyDOMAIN}\{MyID} Account Name: {MyID} Account Domain: {MyDOMAIN} Logon ID: 0xbXXXXXXX Cryptographic Parameters: Provider Name: Microsoft Software Key Storage Provider Algorithm Name: Not Available. Key Name: {CE885431-9B4F-47C2-8415-2D766B999999} Key Type: User key. Key File Operation Information: File Path: C:\Users\{MyID}\AppData\Roaming\Microsoft\Crypto\RSA\S-1-5-21-4585646465656-260371901-2912106767-1207\66099999999991e891f187e791277da03d_dfe9ecd8-31c4-4b0f-9b57-6fd3cab90760 Operation: Read persisted key from file. Return Code: 0x0[/code] Event ID 5061: Audit Faillure, "System Intergrity" [code]Cryptographic operation. Subject: Security ID: {MyDOMAIN}\{MyID} Account Name: {MyID} Account Domain: {MyDOMAIN} Logon ID: 0xbXXXXXXX Cryptographic Parameters: Provider Name: Microsoft Software Key Storage Provider Algorithm Name: RSA Key Name: {CE885431-9B4F-47C2-8415-2D766B999999} Key Type: User key. Cryptographic Operation: Operation: Open Key. Return Code: 0x8009000b Could this be related to this error from the CryptAcquireContext function NTE_BAD_KEY_STATE 0x8009000BL The user password has changed since the private keys were encrypted. The problem is that the users I using at the moment can not change their password.

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  • Oracle Error ORA-12560 TNS:Protocol Adapter error?

    - by David Basarab
    I am using Oracle Database 10g. Both Servers are Windows 2003. I have an Orcale Database set up on one server. Here is the TNSNames.ora from the server with the database. # tnsnames.ora Network Configuration File: C:\oracle\product\10.2.0\db_1\network\admin\tnsnames.ora # Generated by Oracle configuration tools. ORCL.VIRTUALHOLD.COM = (DESCRIPTION = (ADDRESS = (PROTOCOL = TCP)(HOST = databaseServer)(PORT = 1521)) (CONNECT_DATA = (SERVER = DEDICATED) (SERVICE_NAME = orcl) ) ) The Environmental Variables on the Server are ORACLE_HOME = C:\oracle\product\10.2.0\db_1 ORACLE_SID = orcl I am trying to connect to it from another box that has Oracle Client installed. Here is the tnsnames.ora installed on the other client server. # tnsnames.ora Network Configuration File: C:\oracle\product\10.2.0\client_1\network\admin\tnsnames.ora # Generated by Oracle configuration tools. ORCL = (DESCRIPTION = (ADDRESS_LIST = (ADDRESS = (PROTOCOL = TCP)(HOST = databaseServer)(PORT = 1521)) ) (CONNECT_DATA = (SERVICE_NAME = orcl) ) ) ORACLE_HOME = C:\oracle\product\10.2.0\client_1 ORACLE_SID = orcl Locally on the database server I can connect to through sqlplus with no issues. On the client machine I keep getting the error: ORA-12560: TNS:protocol adapter error What am I missing? Does the client TNSNames.ora need to be different?

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  • Barriers to IPv6 deployment: addressing

    - by sysadmin1138
    There are several things that are keeping IPv6 deployment from being a topic of active discussion here at my work. There are the usual technical issues, but one non-technical one appears to be a major stumbling block on the path to actually getting a deployment project going. Addresses, memorizing of. Specifically, IPv4 addresses are comprehensible, and IPv6 addresses just look like a big long string of hex. The human mind has real trouble memorizing lists of more than 7-8 items, and an IPv4 address (192.168.231.148) has four items in it which makes it easy for us to memorize. A fully populated IPv6 address has not only 8 sections, but each section has 4 hex digits in it. IPv6 addresses were not designed for memorization. To the technician who knows that the DNS server is at 192.168.42.42 (or more likely "42.42", since the company prefix is likely memorized), the idea of memorizing an IPv6 address fills them with dread. Which in turn makes them much less enthusiastic about participating in an IPv6 deployment project. Because of how our network works we're not fully dynamic in terms of v4 addressing. We have several to many subnets that are entirely statically assigned for a variety of reasons, chief among them being that the overhead of static DHCP assignments is perceived as being too great. Also, some devices still aren't smart enough to pull DNS addresses out of DHCP while also having a static assignment, and therefore require manually configured DNS settings. Therefore, some v6 address memorization will have to be done. We're not under any mandate to get v6 out the door, so we don't have pressure from the top. However, it is time to start prepping our infrastructure to handle IPv6 even if we don't convert wholesale. For those of you who have been in IPv6-land for a while, what short-cut methods do you use to discuss or keep track of subnets and specific/critical IP addresses? If I can help reduce some of the dread surrounding IPv6 we might get the project going.

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  • VMware "boot screen" - add info like contact, phone number, etc.?

    - by TheCleaner
    I've tried searching Google and VMware's KB but maybe I'm not typing the right search criteria...only finding ways to fix problems with booting or screen issues. On the default boot screen of a host it looks similar to this picture from GIS: I'm curious if it is possible somehow to make it look like this instead (adding custom details): I know for the most part the info is "useless" since it is administered remotely, etc. But when I deploy standalone hosts to branch offices, it'd be nice for them to see this type of info on the boot screen. I may also include the VMs hosted on it (again on standalone hosts). Normal monitoring, etc. will be done remotely. This is strictly for odd times when the branch contact may say "the electricians are saying they need to turn off this circuit but I have no idea who to call in IT to tell them this box needs to be shut down" or similar. Anyone who has dealt with small branch offices can tell you that if it isn't labeled they easily forget what it is for and will simply say after the incident "I didn't know what it was or who to call." Possible?

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  • Scaling databases with cheap SSD hard drives

    - by Dennis Kashkin
    Hey guys! I hope that many of you are working with high traffic database-driven websites, and chances are that your main scalability issues are in the database. I noticed a couple of things lately: Most large databases require a team of DBAs in order to scale. They constantly struggle with limitations of hard drives and end up with very expensive solutions (SANs or large RAIDs, frequent maintenance windows for defragging and repartitioning, etc.) The actual annual cost of maintaining such databases is in $100K-$1M range which is too steep for me :) Finally, we got several companies like Intel, Samsung, FusionIO, etc. that just started selling extremely fast yet affordable SSD hard drives based on SLC Flash technology. These drives are 100 times faster in random read/writes than the best spinning hard drives on the market (up to 50,000 random writes per second). Their seek time is pretty much zero, so the cost of random I/O is the same as sequential I/O, which is awesome for databases. These SSD drives cost around $10-$20 per gigabyte, and they are relatively small (64GB). So, there seems to be an opportunity to avoid the HUGE costs of scaling databases the traditional way by simply building a big enough RAID 5 array of SSD drives (which would cost only a few thousand dollars). Then we don't care if the database file is fragmented, and we can afford 100 times more disk writes per second without having to spread the database across 100 spindles. . Is anybody else interested in this? I've been testing a few SSD drives and can share my results. If anybody on this site has already solved their I/O bottleneck with SSDs, I would love to hear your war stories! PS. I know that there are plenty of expensive solutions out there that help with scalability, for example the time proven RAM-based SANs. I want to be clear that even $50K is too expensive for my project. I have to find a solution that costs no more than $10K and does not take much time to implement.

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  • sudo fdisk in a live session does not show all hard drives

    - by cornbread
    I am having Grub2 issues in my Ubuntu 10.04 dual boot, 2 hard drive system. So I am attempting to follow the standard grub2 reinstallation guide (cant post link because of spam filters allowing only one... ?_?) Don't know if this is the root of my problem, but my speedy internal HD with my OS on it is not showing up anywhere in a live session. Not in nautilus, behind fdisk.... no where. When I can get the main system to boot, there is no issue seeing all available partitions. But the live session sees only the 1TB internal media/backup hard drive. I need access to the other hard drive and it's partitions to finish the grub2 re-installation but I am not sure anymore that is the underlying issue. Anyone have experience with this? The issue I have identified as a grub2 issue is fully described here. SandPvvr describes it exactly. Some notes: I do not see the grub2 menu for my os's holding down the shift key after my bios screen works maybe 10% of the time Not related to reinstalling a windows os. havent been touched in a year do some web development. issue may have started when I was playing with ruby and django. not sure on this. Could a dev environment do this? fdisk in live session ubuntu@ubuntu:~$ sudo fdisk -l Disk /dev/sdb: 1000.2 GB, 1000204886016 bytes 255 heads, 63 sectors/track, 121601 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: 0x0001d518 Device Boot Start End Blocks Id System /dev/sdb2 1 121601 976759939 5 Extended /dev/sdb5 487 110765 885816036 83 Linux /dev/sdb6 110766 121601 87040138+ b W95 FAT32 /dev/sdb7 1 486 3903700+ 82 Linux swap / Solaris Partition table entries are not in disk order

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  • Hotmail mail delivery issue (spam)

    - by chaochito
    Hello, I am running a Postfix server in a dedicated server in a Linux environment (centOS 5.3) for a social networking web application and are experiencing deliverability issues with Hotmail (I can send mails to Gmail, Yahoo, Aol in inbox). I only send legit mails for registered users (notifications). I have SPF, DK and DKIM setup. I pass the Sender ID test when mailing to [email protected] but we have "X-Auth-Result : None" only in Hotmail headers and no X-SID-Result:Pass. We have been enrolled in their program for more than 2 weeks and normally when you apply to their Sender ID program you are supposed to have X-SID-Result:Pass and X-Auth-Result:Pass. I contacted Hotmail about the issue and they told me that my domain looks like added to Sender ID in their system this is beyond their support and asked me to contact my ISP. As you can imagine, my ISP has no clue about that either. I don't really know what could be wrong... Mails are currently filtered as spam and we would like to be able to have them landing in inbox.

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  • debian 6 losing a large amount of packets

    - by Sc0rian
    I have a rather strange problem. We covered all the obvious hardware related issues (different nic, eth cable and switch) however I cannot seem to stop eth dropping packets. I have 4 servers all exactly the same. driver: e1000e version: 1.2.20-k2 firmware-version: 1.8-0 bus-info: 0000:06:00.0 They are all running the latest kernel(2.6.32-5-amd64). However they do this: RX packets:17073870634 errors:0 dropped:14147208 overruns:0 frame:0 another server: eth0 Link encap:Ethernet HWaddr e0:69:95:05:2f:cb inet addr:10.10.10.86 Bcast:10.10.10.255 Mask:255.255.255.0 UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 RX packets:5455209277 errors:0 dropped:375445 overruns:0 frame:0 TX packets:3666134366 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:1000 RX bytes:6688414486673 (6.0 TiB) TX bytes:1611812171539 (1.4 TiB) Interrupt:20 Memory:d0600000-d0620000 eth1 Link encap:Ethernet HWaddr 00:1b:21:b7:7a:ce inet addr:10.10.0.86 Bcast:10.10.0.255 Mask:255.255.255.0 UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 RX packets:15473695728 errors:0 dropped:5808325 overruns:0 frame:0 TX packets:20112364421 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:1000 RX bytes:9192378766434 (8.3 TiB) TX bytes:20216368266761 (18.3 TiB) Interrupt:17 Memory:d0280000-d02a0000 A massive amount of dropped packets. I have tried to load on the latest driver, 1.9.5. This did nothing. I'm not sure what else to do.

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  • How to take screenshots of WPF applications in correct size and content

    - by Thomas W.
    I usually take screenshots of single windows via the built-in key combination Alt+Print. Unfortunately this does not work well for more and more applications - all of them are WPF applications. Usually the screen shots have at least one of the following properties: the screenshot is larger than expected and contains parts of the screen around the actual window the screenshot has the correct size but includes parts of other windows, e.g. the Windows task bar. Of course the task bar might be in front of the window, but taking screen shots of "normal" programs works fine. How do I take screenshots of WPF application which are correct in size and content? I'd like to avoid the extra effort of checking all the screenshots for correctness, reproducing the situation, taking them again in case of issues or repairing/faking them manually in any pixel manipulation program (e.g. Paint.NET). I observe this on Windows 7 x64 SP 1, all official updates installed, but it might apply to other Windows versions as well (not tested yet). .NET 4.5 is installed. The application itself might only need the built-in .NET 3.5.1. It's reproducible on a virtual machine with the same settings. Examples: Screenshot of an application running in maximized mode. The screen shot includes parts of the task bar. Screenshot of a progress dialog which is behind the task bar. The screenshot also includes the task bar, while it doesn't for non WPF applications.

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