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  • amazon aws, rds

    - by b0x0rz
    just need a quick info on two questions but very related. 1 if we use rds on amazon aws, what happens if some of the machines rds is running on crash? i mean what happens with the data? is it gone? 2 if we use rds on amazon aws via beanstalk, and decide to stop them is the database gone, i mean data, is it gone? thnx a lot, simple yes/no will do, but if you can give more info or a solution to mitigate these issues if any of the answers is unfavorable, that would be great.

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  • MySQL Server hitting 100% unexpectedly (Amazon AWS RDS)

    - by Luc
    Please help! We've been struggling with this one for months. This week we upped our RDS instance to the highest performing instance and although the occurrences have reduced, we're still having our DB all of a sudden hit 100%. It comes out of nowhere. Sometimes 2am, sometimes midday. I've ruled out a DOS - our pages access logs have normal traffic I've ruled out memcached suddenly dieing (hits and misses continue as normal). The SHOW PROCESSLIST while we have issues reports about 500 queries in queue. If I kill them off or restart the server, they just keep coming back and then eventually out of knowhere, our server resumes back to normal. Sometimes up to 3 hours. Our bad performing queries take .02 seconds to execute when the server eventually returns back to normal but while we're in this 100% CPU physco phase, those queries never finish executing. Please help!!!!! Anybody know anything about MYSQL query optimization? Could it be the server deciding to use different indexes all of a sudden, which puts it into a spiral?

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  • How to know which program is using the WebClient service?

    - by sork
    Hello, I just found out by using TCPView that one of my svchost.exe had an http connection in "CLOSE_WAIT" to a strange ip address, although no other visible program was running. With the help of Process Explorer I discovered that this svchost was using the WebClient windows service. I'm wondering how I can figure out what program used WebClient to connect to this ip, in order to determine if it's malware.

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  • Migrate reports from MS Access to OOo Base

    - by John Gardeniers
    I'm currently looking at upgrading our office machines from Office XP to Office 2010. For most users the standard edition is fine but just a few of us use Access. There are only a couple of standalone Access databases but the program is used fairly extensively (mostly by myself) as a front end to MySQL. As the cost different between standard and pro versions of Office 2010 is about $170 (AUD) I'm looking at possible alternatives to Access. I'm no huge fan of Open Office but could be convinced to use it if I can find a way to migrate the many reports we currently have in Access. The data is not a problem. So far I've found nothing to suggest this is even possible/practical but perhaps someone here knows otherwise. I'm also open to suggestions for other alternatives to Access but it must be able to produce flexible reports easily. That is the one real strength of Access in my view. Because of its subjective nature I'm making this community wiki.

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  • HTTP Error: 413 Request Entity Too Large

    - by Torben Gundtofte-Bruun
    What I have: I have an iPhone app that sends HTTP POST requests (XML format) to a web service written in PHP. This is on a hosted virtual private server so I can edit httpd.conf and other files on the server, and restart Apache. The problem: The web service works perfectly as long as the request is not too large, but around 1MB is the limit. After that, the server responds with: <!DOCTYPE HTML PUBLIC "-//IETF//DTD HTML 2.0//EN"> <html><head> <title>413 Request Entity Too Large</title> </head><body> <h1>Request Entity Too Large</h1> The requested resource<br />/<br /> does not allow request data with POST requests, or the amount of data provided in the request exceeds the capacity limit. </body></html> The web service writes its own log file, and I can see that small messages are processed fine. Larger messages are not logged at all so I guess that something in Apache rejects them before they even reach the web service? Things I've tried without success: (I've restarted Apache after every change. These steps are incremental.) hosting provider's web-based configuration panel: disable mod_security httpd.conf: LimitXMLRequestBody 0 and LimitRequestBody 0 httpd.conf: LimitXMLRequestBody 100000000 and LimitRequestBody 100000000 httpd.conf: SecRequestBodyLimit 100000000 At this stage, Apache's error.log contains a message: ModSecurity: Request body no files data length is larger than the configured limit (1048576) It looks like my step #4 didn't really take, which is consistent with step #1 but does not explain why mod_security appears to be active after all. What more can I try, to get the web service to receive large messages?

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  • Connection error when trying to browse SSAS cube in BIDS

    - by lance
    SQL Server 2008 db instance is installed on a win 2003 server, networked (but no domain) VM. I can browse a cube from BIDS on the same VM, but when I try to browse the same cube on a windows 7 (home premium) networked machine, I get a connection error. The error suggests checking the datasource settings which I have, and when I click "test connection" on the datasource it is successful. Looking for probably causes and solutions?

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  • Can't connect to EC2 instance in VPC (Amazon AWS)

    - by Ryan Lynch
    I've taken the following steps: Created a VPC (with a single public subnet) Added an EC2 instance to the VPC Allocated an elastic IP Associated the elastic IP with the instance Created a security group and assigned it to the instance Modified the security rules to allow inbound ICMP echo and TCP on port 22 I've done all this and I still can't ping or ssh into the instance. If I follow the same steps minus the VPC bits I am able to set this up without issue. What step am I missing?

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  • AWS VPC public web application connecting to database via VPN

    - by Chris
    What I am trying to do is set up a web application that is public facing but makes calls to a database that is on an internal network. I have been trying to set up an AWS VPC with a public subnet, private subnet, and hardware VPN access but I can't seem to get it to work. Can someone help me understand what the process flow here should be? My understanding is that I need a public subnet to handle the website requests and then a private subnet to connect to the VPN but what I do not understand is how to send requests down the chain and get the response. Basically what I am asking is how can I query the database via VPN from that public website? I've tried during rout forwarding but I can't successfully complete the process. Does anyone have any advice on something I can read on this subject or an FAQ on setting something like this up? Is it even possible? I'm out of my league here, this is not my area of expertise but I'm being asked to solve this problem. Any help would be appreciated. Thanks

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  • How to setup terminal service gateway in my RDP client

    - by Stan
    I am using "RD Tabs" to bypass the terminal service gateway to RDP to the remote host. Usually I use browser and go to https://webvpn.company.com:777 with my account. Now in RD Tabs advanced settings, it's asking server name and authentication method. How should I fill this information? I tried below: server: webvpn.company.com:777 authentication: Attempt TLS But it's not working, what could be wrong? Thanks.

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  • Amazon EC2, fastest way to get a node into an existing cluster

    - by imaginative
    I'm new to Amazon AWS. A lot of the time I hear about people folks spawning instances and almost instantly putting them behind a load balancer and into an existing cluster. In the traditional world of managed machines, this would include provisioning hardware, installing an OS, configuring the network on the machine and once the network is available, use a tool of your choice such as CFengine, Puppet or Chef to bootstrap the machine based on its class. It seems like there are "shortcuts" that are able to get a server of a particular class up and running in Amazon EC2. If I have a particular stack running on my server, such as erlang, tomcat6 etc.. what's the fastest way to get these up and running and hooked into Amazon's load balancer? From network, to software stack to kernel tuning? Is it a combination of creating an AMI then running a tool like Puppet against the new instance? Any idea

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  • dhcrelay running as both DHCP and DHCPv6 relay agent on CentOS 6.2

    - by Tibor
    I am trying to set up a DHCP relay agent that would relay DHCP requests for both IPv4 and IPv6. I am using CentOS 6.2 and I am using the dhcrelay from the ISC DHCP implementation. I would like to set it up as a service, but the man page for dhcrelay states: -6 Run dhcrelay as a DHCPv6 relay agent. Incompatible with the -4 option. -4 Run dhcrelay as a DHCPv4/BOOTP relay agent. This is the default mode of operation, so the argu- ment is not necessary, but may be specified for clarity. Incompatible with -6. It seems that the -6 and -4 options are incompatible. How would I still make it work for both protocols without rolling my own service wrapper for both cases?

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  • Windows running service as "system" when log on as is "user"

    - by danspants
    I have an apache service that is running as "SYSTEM", however the log on as settings are configured to run as my user account. The windows task manager claims that I am the user name associated with the service when it's running, however I had the apache service call a python script which indicates that the user is "SYSTEM. Any ideas on how to fix this? I've reinstalled 3 times and once with a newer version.

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  • Tracking down the cause of a web service fault running in IIS

    - by BG100
    I have built a web service in Visual Studio 2008, and deployed it on IIS 7 running on Windows Server 2008 R2. It has been extensively tested, handles all errors gracefully and logs any uncaught errors to a file using log4net. The system normally runs perfectly, but occasionally (2 or 3 times a day) a fault occurs and screws up the application which needs an iisreset to get it working again. When the fault occurs I get some random errors that are caught by my catch-all error log, such as: Value cannot be null. Could not convert from type 'System.Boolean' to type 'System.DateTime'. Sequence contains no elements These errors are raised on every request until I manually do an iisreset, but there is no sight of them when the system is running normally. The web service is a stateless request-response application. Nothing is stored in the session. It could be load related, but I doubt it as there are only around 30 or 40 requests per minute. This is proving very tricky to track down. I can't work out what is putting IIS into this bad state, and why it needs an iisreset to get it working again. Nothing is reported in the event log. Can anyone suggest how to enable more extensive logging that might catch this fault? Also, does anyone know what might be causing the problem?

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  • How to get a service to listen on port 80 on Windows Server 2003

    - by Miky D
    I've coded a custom windows service that listens on TCP port 80 but when I try to install it on a Windows Server 2003 machine it fails to start because some other service is already listening on that port. So far I've disabled the IIS Admin service and the HTTP SSL service but no luck. When I run netstat -a -n -o | findstr 0.0:80 it gives me the process id 4 as the culprit, but when I look at the running processes that process id points to the "System" process. What can I do to get the System process to stop listening on port 80 and get my service to listen instead? P.S. I should point out that the service runs fine if I install it on my Windows XP or Windows 7 development boxes. Also, I should specify that this has nothing to do with it being a service. I've tried starting a regular application that attempts to bind to port 80 on the Windows Server 2003 with the same outcome - it fails because another application is already bound to that port.

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  • How can I limit CloudFront downloads

    - by Alex Crouzen
    I'm looking to use Amazon's CloudFront to host some content in the near future. Currently, I'm keeping it very simple and I'm just uploading my content to S3 and then making a distribution available via Cloudfront. However, because I have a limited budget, I'd like to be able to limit the number of downloads or the money spent on bandwidth. As far as I can see, I can't set any quotas or budgets like you can in Google's App Engine, so I'm looking for another way of doing this. Has anyone had any experience doing this? One approach I'm thinking of is having to place a webserver with redirects in between, but that kind of defeats the simplicity of CF for me.

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  • Can't star SSH on Ubuntu 12.10 AWS EC2

    - by Conor H
    So i've just started playing around with Ubuntu on Amazon EC2. I've just issued the following command to restart ssh but it has now "killed" ssh. sudo /etc/init.d/ssh restart I can't seem to ssh to this instance anymore. Putty just gives me "connection refused". NOTE: In this case I just restarted SSH to see the result. I didn't change any settings. This was to confirm that it was the restart command was the problem and not any configs I made. What is the correct way to restart SSH? P.S. That usually works on other Ubuntu boxes. Thanks. EDIT: It is also worth noting that when I ran that command I was taken straight back to a prompt. I didn't get any output on the console.

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  • AWS ELB as backend for Varnish Accelerator

    - by addisonj
    I am working on a large deployment on AWS that has high uptime requirements and variable loads throughout the day. Obviously, this is the perfect use case for ELB (Elastic Load Balancer) and autoscaling. However, we also rely on varnish for caching of API calls. My initial instinct was to structure the stack so that varnish uses ELB as a backend which in turn hits an appGroup. Varnish -> ELB -> AppServers However, according to a few sources that isn't possible as ELB constantly changes the IP address of its DNS hostname, which varnish caches on start, meaning changes to the IP won't be picked up by varnish. Reading around however, it looks like people are doing this so I am wondering what workarounds exist? Perhaps a script to reload the vcl periodically? In the case of where this is really just not a good idea, any idea of other solutions?

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  • Migrate an intermediate CA to a new root

    - by Tim Brigham
    Using the Microsoft CA is there any way to cut over to a new certificate authority from an intermediate authority? Both my systems are Microsoft CAs - I have a 2008 R2 Enterprise CA (intermediate) and an old 2003 CA (root). The 2003 box bit the dust and I don't have good backups. I still have a few months before the CRL expires; instead of having to cut over to a new intermediate authority is there a ready way to simply point this intermediate authority to a new offline CA?

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  • Disable disk caches in AWS EBS for PostgreSQL?

    - by Alexandr Kurilin
    It's my understanding that, without correctly disabling OS-level and drive-level caching, there is a chance that in case of system failure the Write-Ahead Log might not be saved correctly and in fact might get corrupted, possibly preventing data recovery. I've already made sure that wal_sync_method=fdatasync however I was unable to make any configuration changes with hdparm since I get the following: $ sudo htparm -I /dev/xvdf /dev/xvdf: HDIO_DRIVE_CMD(identify) failed: Invalid argument Looks like that option is not available in the kind of setup you get in EC2. Am I missing anything here? Are there any other obvious caches I have to disable to ensure the WAL's safety?

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  • Sound entirely stopped working on Windows 8 on a Macbook Pro

    - by Kelvin Bongers
    I am currently running Windows 8 (downloaded from DreamSpark) on a Macbook Pro. This worked fine for a while but suddenly all audio stopped working. When I go to "Playback devices" and hit "Test" on the speakers I get treated with the following message: This also shows up right after I try restarting. I tried disallowing exclusive usage of the devices but it makes no difference. Edit: After some looking around I tried changing the sample rate and bit depth so I would get a dialog screen to force Windows to go around the program that's using it. I did get the dialog but then instead of changing it I got the following error: Edit 2: I narrowed it down to a single service failing to start, the Multimedia Class Scheduler service fails to start with the following error:

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  • Why can't I create an Alias Resource Record Set for an EC2 instance

    - by praterade
    I have been working with AWS for over a year, setting up EC2 instances, domains, ELBs, etc. When I want to assign a subdomain to an EC2 instance, I have to create an elastic IP (that I pay for), then assign a CNAME record to that elastic IP. When I want to assign a subdomain to an ELB (load balancer) instance, I just create an alias resource record set to the ELB. I've read over the docs and don't understand why AWS doesn't support aliasing to instances. Am I missing a key concept here? Wouldn't it be simpler to just alias EC2 instances and skip the whole elastic IP bit?

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  • No clue for high load average on top

    - by Oz.
    We have several machines on Amazon (ec2) of the type c1.xlarge with 16 cpus, running the Amazon AMI. Details on the machine: 7 GB of memory 20 EC2 Compute Units (8 virtual cores with 2.5 EC2 Compute Units each) 1690 GB of instance storage 64-bit platform I/O Performance: High API name: c1.xlarge One out of the several machines is showing a high load average, since we have run the last yum upgrade a couple of weeks a go. We did not yet update the other machines, and everything looks normal on them. The strange thing is that the top command not showing any hint for the cause of the load. CPUs are 4.8%us, 1.1%sy, 0.0%ni, 94.1%id, 0.0%wa, 0.0%hi, 0.0%si, 0.0%st(see below). Mem is about 1.5GB free. Any idea what could it be, or where else can we check? Many thanks for the help. # # top # top - 07:57:42 up 4:18, 1 user, load average: 1.36, 1.45, 1.47 Tasks: 131 total, 1 running, 130 sleeping, 0 stopped, 0 zombie Cpu(s): 4.8%us, 1.1%sy, 0.0%ni, 94.1%id, 0.0%wa, 0.0%hi, 0.0%si, 0.0%st Mem: 7120092k total, 5644920k used, 1475172k free, 532888k buffers Swap: 0k total, 0k used, 0k free, 3463936k cached PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND 1557 mysql 20 0 1829m 374m 6448 S 14.3 5.4 11:15.09 mysqld 6655 apache 20 0 416m 49m 3744 S 9.3 0.7 0:04.85 httpd 27683 apache 20 0 421m 54m 3708 S 9.0 0.8 0:00.99 httpd 6682 apache 20 0 424m 57m 3788 S 8.3 0.8 0:03.81 httpd 16816 apache 20 0 419m 51m 3760 S 4.3 0.7 0:04.09 httpd 22182 apache 20 0 417m 50m 3756 S 1.7 0.7 0:06.34 httpd 219 root 20 0 0 0 0 S 0.3 0.0 0:00.34 kworker/7:1 699 root 20 0 0 0 0 S 0.3 0.0 0:00.40 kworker/3:1 1 root 20 0 19376 1508 1212 S 0.0 0.0 0:00.29 init 2 root 20 0 0 0 0 S 0.0 0.0 0:00.00 kthreadd 3 root 20 0 0 0 0 S 0.0 0.0 0:00.71 ksoftirqd/0

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  • Which is faster for read access on EC2; local drive or EBS?

    - by Phillip Oldham
    Which is faster for read access on an EC2 instance; the "local" drive or an attached EBS volume? I have some data that needs to be persisted so have placed this on an EBS volume. I'm using OpenSolaris, so this volume has been attached as a ZFS pool. However, I have a large chunk of EC2 disk space that's going to go unused, so I'm considering re-purposing this as a ZFS cache volume but I don't want to do this if the disk access is going to be slower than that of the EBS volume as it would potentially have a detrimental effect.

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  • Reasonable Location to Install Web Service on Server

    - by Mr. Disappointment
    Firstly, I'm a software developer and not qualified as any kind of system or server expert so I'm looking for advice in order to help me prevent faults on our server. I've written a modular system to carry out certain tasks for us autonomously to prevent us from writing the same old code over and over again. This consists of a Windows Service (.NET), a Web Service (WCF), a shared Class Library, and a Database which will run on a Windows Server 2003. The problem comes, for me, in deployment. Specifically the web service - naturally the local service (and required shared library) are persisted (by default and convention) in the Program Files folder, but storing the web service here just seems absurd to me (even though we'd lock it down to appropriate use only). Should the files be stored some place else all together? Or split them up and store the web service elsewhere?

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