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• What hardware makes a good MongoDB Server ? Where to get it ?

  - by João Pinto Jerónimo

  Suppose you're on dell.com right now and you're buying a server to run your MongoDB database for your small startup. You will have to handle literally tens of thousands of writes and reads per minute (but small objects). Would you go for 2 processors ? Invest more on RAM ? I've heard (correct me if I'm wrong) MongoDB handles the most it can on the RAM and then flushes everything to the disk, in that case I should invest on a CPU with a large L2 cache, probably 40GB of RAM and a solid state drive.. right ? Would I be better off with a high end (~$11,309, 2 expensive processors, 96GB of RAM) server or 2x(~$6,419, 2 expensive processors, 12GB of RAM) servers ? Is Dell ok or do you have better sugestions ? (I'm outside the US, on Portugal)

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• Testing UDP port connectivity

  - by Lock

  I am trying to test whether I can get to a particular port on a remote server (both of which I have access to) through UDP. Both servers are internet facing. I am using netcat to have a certain port listening. I then use nmap to check for that port to see if it is open, but it doesn't appear to be. Iptables is turned off. Any suggestions why this could be? I am eventually going to setup a VPN tunnel, but because I'm very new to tunnels, I want to make sure I have connectivity on port UDP 1194 before advancing.

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• Postfix Vacation.pl with local users

  - by Simiyu

  Hi, I am trying to setup the vacation.pl script on a mail servers which has local users only (since they are only 10 users). I have installed the SquirrelMail plugin and the Auto respond option is available for the users, but when an email is sent to the addresses no auto reply email is sent to the sender. There are also no logs on the /var/log/vacation folder which i created as well as the normal log files. Most of the examples online refer to virtual users, can it work with local users? and if so how? regards, Arthur

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• How to execute a shell script on startup?

  - by vijay.shad

  I have create a script to start a server(my first question). Now I want it to run on the system boot and start the defined server. What should I do to get this done? My findings tell me put this file in /etc/init.d location and it will execute when the system will boot. But I am not able to understand how the first argument on the startup will be start? Is this predefined somewhere to use start as $1? If I want to have a case startall that will start all the servers in the script, then what are the options I can manage. My Script is like this: #!/bin/bash case "$1" in start) start ;; stop) stop ;; restart) $0 stop $0 start ;; *) echo "usage: $0 (start|stop|restart)" ;; esac

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• Nxlog Multiline Input to 1 Syslog Message

  - by Eric

  I am using nxlog to tail a custom log file on one of my Windows servers. Each entry in the text file looks similar to this. =================================================================================================================== 1/14/2014 3:08:48 PM DOMAIN\user1 adding group member... Domain: blah Group: TestGroup Member: CN=Joe Bob,CN=Users,DC=blah,DC=ARG,DC=com 1/14/2014 3:08:48 PM 1 member added.<br> ================================================================================================ I'm trying to send this log to my syslog server and I want to combine these multiple lines to 1 line so I can easily grep/search for specific users or groups. I've read some of the documentation on nxlog's website regarding multiline but haven't found a specific config to put them all in 1 entry with a syslog header. Thanks, Eric

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• IRC "proxy" for persistent connection between several computers

  - by Zeta Two

  I'm looking for a program that enables me to stay connected to one or more IRC networks and be able to view the log even though I connect from several different computers. I'm thinking about something like a proxy running on a server who always is connected to the servers/channels I want and to which I connect from whichever client I want to use. Does anyone know of a program like this? Edit: Apparently I could be running a IRC session in a shell on a server and connect to this but I would like something more GUI:ish.

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• Windows server 2008 UPS support

  - by Rory McCune

  I'm looking to set-up a UPS on a Windows Small Business Berver 2k8 and I've noticed that there are some large price differences for similar capacity in-line UPSs. The most important point for me in UPS selection is that the server should have the ability to shut itself down before the UPS power runs out, so that if the server is unattended during the outage, it should minimize the risk of data loss. From some reading it appears that Windows Server 2008 should has the ability to natively recognise a UPS, which can then be managed through the battery settings on the server or via WMI. What I'm wondering if anyone know is, Is Windows 2008 servers UPS support specific to certain brands of UPS (eg, APC) or is it likely to work with any UPS which has a USB port, which I can connect to the server?

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• Does SMTP greylisting a) stop much spam and b) stop much legitimate mail?

  - by Whisk

  I've just set up an SMTP server on a relatively little used domain using Postfix and enabled greylisting with SQLGrey. So far it seems to be working OK, and while there's the slight irritation of delays to emails from new senders, I can see from the logs that it's deterring a number of spam messages. In your experience does greylisting effectively stop much spam? Is it a useful addition to e.g. SpamAssassin or is adding it on top overkill/unnecessary? If I were to roll this out to heavier use domains (perhaps with more demanding users) would you anticipate a significant portion of poorly configured mail servers that would end up bouncing or losing messages?

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• Do I need a VPN to secure communication over a T1 line?

  - by Seth

  I have a dedicated T1 line that runs between my office and my data center. Both ends have public IP addresses. On both ends, we have a T1 routers which connect to SonicWall firewalls. The SonicWalls do a site-to-site VPN and handle the network translation, so the computers on the office network (10.0.100.x) can access the servers in the rack (10.0.103.x). So the question: can I just add a static route to the SonicWalls so each network can access each other with out the VPN? Are there security problems (such as, someone else adding the appropriate static route and being able to access either the office or the datacenter)? Is there another / better way to do it? The reason I'm looking at this is because the T1 is already a pretty small pipe, and having the VPN overhead makes connectivity really slow.

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• Citrix XenApp application does not have keyboard focus when launched

  - by Jason Pearce

  On new or existing Citrix XenApp 4.5 servers, I am having problems streaming the Allscripts Pro EHR application via the XenApp web interface. When users launch the application via the Citrix XenApp web interface, the application does not have focus, preventing users from typing in their username and password. If they use their mouse to select either the username or password fields, they still cannot enter any text. However, if they do any of the following actions, they can then enter in their username and password and the application runs without problems: Click on the Login button with empty fields. Logon fails but they can then enter their credentials. Minimize the login window and then maximize it. They can then gain keyboard focus to enter their credentials. What might be preventing this particular application from having focus when it launches?

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• NTP doesn't sync

  - by Jonathan

  I'm using Meinberg NTP to sync the time in a VPS. The clock refuses to sync - there's a ~30s shift comparing to other servers. Meinberg NTP comes with a status script that checks hte delay\jitter every 10s and it is showing all zeros. Actions I've taken which didn't help: Restarted the NTP service using a script that comes with Meinberg NTP Added port 123 for UDP and TCP as an exception port to Windows Firewall Added Meinberk NTP executables as an exception program to Windows Firewall validated iburst appears after each server listed in the configuration file Restarted the server The OS is a Windows Server Standard SP2 32bit. What did I miss?

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• Running NginX (with Apache) and cPanel/WHM

  - by ub3rst4r

  I was wondering if its a good idea to be running NginX as the webserver (on port 80) and Apache as the reverse proxy (on port 8080) with cPanel/WHM being used as a control panel? I also installed Nginx Admin so the configuration for NginX is managed by WHM. The reason I am asking is because I came across an article (http://kbeezie.com/view/apache-with-nginx/) which explains how to setup Apache as a reverse proxy but it states If you are using a control panel based hosting such as cpanel/whm, this method is not advised. Most of the servers configuration is handled automatically in those cases, and making manual changes will likely lead to problems (plus you won’t get support from the control panel makers or your hosting provider in most cases). Anyone have any past experiences with this and can say if its good/bad idea?

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• Backup and restore MySQL database without system access

  - by Sencerd

  Hi guys, I am trying to move a database from 1 provider to another, the problem is that I don't have system access at either end (ie, no ssh), so I cannot use a mysqldump. I have already tried using MySQL Administrator, the backup took about 45 minutes, but when it came to restoring it was moving at a snails pace, and estimating 12+ hours. This is a live app so I need to keep the downtime to an absolute minimum. The database consists of 35 tables, a mixture of MyISAM and InnoDB, the whole thing comes to about 4.4GB. The source and destination databases are both running on very powerful servers. Any suggestions on a quick way of doing this will be gratefully received. Thanks

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• Distributed Nagios Installation

  - by kruczkowski

  I'm looking for a plug-in or product that will act as a remote probe and perform tests then send back the results to the central Nagios server. Reason for this is that I'd like to monitor internal systems and servers at customers, but don't want to allow all the traffic passing the firewalls. Ideally I'd like a soft-probe that would be installed and then perform the tests and send back the results (via SSH) to the central Nagios installation. Does anyone know of a product or plug-in that would offer such service? If not Nagios, is there any other monitoring system that does such a thing (ideally open-source)?

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• Older raid controllers in raid 5 vs. Jbod and SW raid

  - by TEB

  Hi. Im in the fortunate position to have 6 Supermicro older VOD servers with the following config: Supermicro 3U case, 3xPSU Dual Xeon 3ghz P4 class cpu (5 years old.. havnt checked the exact type) 4GB Ram 3ware 9500-8 SATA controller 8 SATA SLOTS and alot of free drives. 2GB FLASH Bootdrive What im curious about is the RAID5 performance on these old beasts in HW mode vs. SW on Linux with the controller set in JBOD mode. Im thinking on using Centos 5.5 or Ubuntu or ZFS RaidZ on Opensolaris. Any tips? or reccomendations ? best regards TEB

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• Website: Requested filename being rewritten

  - by horatio

  I have been unable to find an answer via search. I have a website (I do not administer the servers) where the server will serve a different file than the one requested. I first noticed this when using a filename of the following form: _foo.php (single underscore) If I request foo.php (does not exist), the server returns _foo.php. By "returns" I mean that the server decides I meant _foo.php, processes the php file, and serves the output. If I request afoo.php, zfoo.php, or even __foo.php (two underscores) (these files do not exist) the server returns _foo.php. If I request aafoo.php, the server returns 404. To sum up: the server seems to be doing a partial filename match. My question is: what is happening and is this accepted behavior for a web server (or standard behavior of a common mod/package/etc)?

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• Finding the most common errors in event logs using Powershell.

  - by Paul

  I have the event logs for one of our servers locally in .evtx format. I can load the log file into PS using the command: Get-WinEvent -Path D:\Desktop\serverlogs.evtx What I would like to do is on the Message field group events where the text matches by a certain percent (say 80% the same). As we have stacktraces for errors in the details which will be the same, but we also log the client's IP, url that was accessed which will likely be different. I want to group them so that I can work out the most common errors to prioritize fixing them and as there are 25,000+ errors in the log file I would rather not do it manually. I think I can work out how to do most of this, but am not sure how I could do the 'group fields which are mostly the same' part, does powershell have anything like this built in?

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• Troubleshoot odd large transaction log backups...

  - by Tim

  I have a SQL Server 2005 SP2 system with a single database that is 42gigs in size. It is a modestly active database that sees on average 25 transactions per second. The database is configured in Full recovery model and we perform transaction log backups every hour. However it seems to be pretty random at some point during the day the log backup will go from it's average size of 15megs all the way up to 40gigs. There are only 4 jobs that are scheduled to run on the SQL server and they are all typical backup jobs which occur on a daily/weekly basis. I'm not entirely sure of what client activity takes place as the application servers are maintained by a different department. Is there any good way to track down the cause of these log file growths and pinpoint them to a particular application, or client? Thanks in advance.

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• Apache: Use Specific Applicaion for CGI scripts

  - by RandomInsano

  I have two servers, one in production and one for development. The production server is Solaris, dev is FreeBSD. Because of this, python is installed in different directories. I'm using Python right now for making CGI scripts, and needing to remember to swap my hashbangs when I copy from dev to production is a little annoying (Same issue for SVN updates depending on which server I'm comitting from). Is there a way to configure apache so that I no longer need to hashbangs? Like, if it would lauch python and supply the CGI script for it? Might be a bit of a stretch, but no harm in asking

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• Scheduled task based on Microsoft patch release cycle

  - by floyd

  I have a simple powershell script which unapproves all patches based on computer group name in WSUS which works great. All of our servers patch on a specific Day/Week/Time starting on Week0-Wednesday which would be the Wednesday after Microsoft Patch Tuesday (2nd Tuesday of every month) all the way to Week3-Sunday. This obviously causes problems as sometimes not all patches get applied in one reboot cycle, and then will install patches the following week during their group policy scheduled patching day/time which is what I'm trying to prevent. My question is I'm trying to schedule my script to run based on this schedule and I am finding it next to impossible using Windows Task Scheduler. For instance if I wanted something to always run on the 4th Monday after Microsoft Patch Tuesday, I cant always use the task scheduler option "4th Monday of the Month" Has anyone run into a similar situation, or know of any task scheduling tools which give you more flexibility than Windows Task Scheduler?

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• Deliver email to Gmail AND Office 365?

  - by gbegley

  We moved our Office app hosting from Google Apps to Office 365. Many of us miss Google Apps, especially its superior search functionality. The pressure to use Office 365 has disappeared; many (but not all) of us would like to go back to Google Apps. Is it possible to configure our domain's mail delivery so that messages are delivered to both Google Apps's Gmail and Office 365, allowing users to choose which platform they prefer? If so, what are the options? Google Apps documentation specifies the ability to deliver messages to a secondary mail server using routing configuration. Currently our MX records are point to Office 365. If I change the MX records to point to Google Apps Mails servers, is the "Office 365 MX record address" the address I would want to use for a Google Apps Routing Target?

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• Advice for migrating email server

  - by Chris Adams

  Hi there, I'm planning to migrate a Zimbra server with about 200gb of data from a server hosted in an office into a datacentre, to increase uptime (we've had a couple of outages when our network here started flaking out, and we have people in other countries relying on this server too). However, I'm not sure how best to migrate the data into the data centre without rendering the connection unusable during office hours, because there's far too much to send in over night over the two meg upstream connection we have here. I'm familiar with using tools like nice to stop a long running process degrading machine performance - is there a simple way to throttle a connection between office hours, so the long running transfer doesn't block the pipe, but then opens up outside of office hours to make the most of the bandwidth? I'm aware the alternative here is to simply mail a hard drive to the data centre, but I'd like to avoid doing that if I could. We're using Centos Linux for our servers, in the office and the datacentre, so extra points for an open source linux answer.

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• perfmon reporting higher IOPs than possible?

  - by BlueToast

  We created a monitoring report for IOPs on performance counters using Disk reads/sec and Disk writes/sec on four servers (physical boxes, no virtualization) that have 4x 15k 146GB SAS drives in RAID10 per server, set to check and record data every 1 second, and logged for 24 hours before stopping reports. These are the results we got: Server1 Maximum disk reads/sec: 4249.437 Maximum disk writes/sec: 4178.946 Server2 Maximum disk reads/sec: 2550.140 Maximum disk writes/sec: 5177.821 Server3 Maximum disk reads/sec: 1903.300 Maximum disk writes/sec: 5299.036 Server4 Maximum disk reads/sec: 8453.572 Maximum disk writes/sec: 11584.653 The average disk reads and writes per second were generally low. I.e. for one particular server it was like average 33 writes/sec, but when monitoring in real-time it would often spike up to several hundreds and also sometimes into the thousands. Could someone explain to me why these numbers are significantly higher than theoretical calculations assuming each drive can do 180 IOPs? Additional details (RAID card): HP Smart Array P410i, Total cache size of 1GB, Write cache is disabled, Array accelerator cache ratio is 25% read and 75% write

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• Enterprise online backup providers

  - by PHLiGHT

  We've used Iron Mountain's LiveVault service but found that it was only good for file level backups. We liked how it backed up every 15 minutes. It doesn't support Exchange 2007-10 and the web interface was very poor. Who else is everyone using? The most notable names in online backup such as Mozy and Carbonite don't really seem suitable for larger companies. We have SQL, Exchange and Sharepoint servers and are looking to virtualize in the near future. Until then bare metal restore capability would be nice. We are currently using Backup Exec 12.5 but that can be so troublesome at times. We have about 2 TB of data. 1TB is archival data.

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• How do i get Safari to ignore the SSL Certificate error?

  - by Tangopop

  In IE 6, 7, 8 and Firefox 3.6.3 and 3.0.5 i have installed a local SSL Certificate on the machine i am testing on and i have gotten the browser to igonre the SSL error (which is off one of my Web Test servers) Now i am tryin to do the same thing within safari 4 and with no luck. Basically i am running some automated scripts to test my website before they go live and i need to be able to ignore these errors as they will all run autonomosly. This is the error screen i am trying to avoid: http://library.bowdoin.edu/news/images/ezproxy-err/safari.jpg As i say i have installed the certificate locally and the IE 7 browser on the same machine works fine.

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