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• VMware Workstation Bridged Network Host UnReachable

  - by user2097818

  VMware Workstation 7 on Win7-64 (Home Premium). I have confirmed this on any guest running on this machine (from winxp to debian). I am using a bridged network connection for my guests (Automatic on VMnet0). All of the network configuration is done with DHCP (including on the host). Problem What I can not do: Ping my host machine from inside any VM. (either shows me "Destination Host Unreachable" or will just timeout) What I CAN do right after power up, with no problems at all. I can connect to the internet from inside the VM I can ping my router from inside the VM I can ping other machines on my network from inside the VM Other machines can ping the VM Other machines can ping the host My host machine can ping the VM (this one is important. read further) Details So I have my router assigned as 192.168.2.1/255.255.255.0, and the router provides the DHCP service (and it seems to be doing so successfully). There are no IP conflicts on the network that I am aware of. All Gateways and Subnet masks are appropriate and matching. My entire workshop is on one single subnet, with one single DHCP server and gateway. There is one method in which I can ping successfully, but it requires an active connection initiated from the host (I start pinging from host to VM). During the period of the active connection, I can successfully ping from VM to host, using explicit IP address. As soon as the host connection is closed, the VM ping starts hanging with the same old messages. My Thoughts This really feels like a firewall problem, but I have turned off all firewalls on host and VM, powered down the network, powered back up, and the problem still persists. And if it was firewall, why would only the IP address associated with bridged VM networks be blocked. I feel as though my host operating system (Win7) is somehow configured incorrectly, or, VMware Workstation is configured incorrectly from the host side. Although I have done my best to put everything in default, I feel like I am missing something silly.

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• Internet setup for my office

  - by prakash

  We have two internet connections to our office and our current setup is like this.. The internet connections require pppoe log in so i take each cable and plug it into a wifi router and configure the router to log in to the pppoe and then plug in a cable from the router to a switch and distribute the internet throughout my office. The problem with this setup is it is really hard to monitor and im not able to monitor who is hogging internet usage and what he or she is actually using it for. apart from this we also have a nas setup which is routed through another switch . Could someone please throw a little light on how i can restructure this setup for easy monitoring and better transparency... ? each wan router is connected to a different switch and is distributed to users accordingly.. we have around 40 users in the office.. we want to setup a single linux box to which i want to connect the two wan connections and from there distribute it to all our users.... im looking for a solution where we do not have to invest more that buying a single pc and a couple of nics

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• Exported csv file is not in right lining with pgadmin

  - by user938363

  We exported a pg 9.3 table to csv file in pgadmin. The problem is that from about 10th line, the lining of the columns were messed up and did not line up correctly with the columns above. We tried a few times and every output has the same problem. We follow the instruction on http://www.question-defense.com/2010/10/15/how-to-export-from-pgadmin-export-pgadmin-data-to-csv for export. The only difference that UTF8 is selected instead of localcharset. What's the right way to export csv in pg?

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• Trouble setting up incoming VPN in Microsoft SBS 2008 through a Cisco ASA 5505 appliance

  - by Nils

  I have replaced an aging firewall (custom setup using Linux) with a Cisco ASA 5505 appliance for our network. It's a very simple setup with around 10 workstations and a single Small Business Server 2008. Setting up incoming ports for SMTP, HTTPS, remote desktop etc. to the SBS went fine - they are working like they should. However, I have not succeeded in allowing incoming VPN connections. The clients trying to connect (running Windows 7) are stuck with the "Verifying username and password..." dialog before getting an error message 30 seconds later. We have a single external, static IP, so I cannot set up the VPN connection on another IP address. I have forwarded TCP port 1723 the same way as I did for SMTP and the others, by adding a static NAT route translating traffic from the SBS server on port 1723 to the outside interface. In addition, I set up an access rule allowing all GRE packets (src any, dst any). I have figured that I must somehow forward incoming GRE packets to the SBS server, but this is where I am stuck. I am using ADSM to configure the 5505 (not console). Any help is very much appreciated!

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• How do I find files containing two strings together in Linux?

  - by alwbtc

  I have a file containing a text: PADLST20120907:D:05B:UN:IBTA+TK4 17 JFL01+01'BGM+250+C'RFF+TN:TK4 I want to find this file in Linux, using these two strings: "JFL" and "20120907". As you see above, the file contains both "JFL" and "20120907". What should I write in command line? Stirngs may or may not be in the same line. I want to see file names with full path in the output. I don't want to see error messages or permission denied warnings. I want to search recursively in the directory I am standing in or I would like to specifiy a path. regards

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• Dropbox.py on RHEL 6

  - by Timothy R. Butler

  I'm trying to run a headless install of Dropbox on RHEL 6. The daemon seems to be running, but when I try to use Dropbox's associated dropbox.py tool to control the daemon, it fails to run with the following error: Traceback (most recent call last): File "./dropbox.py", line 26, in <module> import locale File "/usr/lib64/python2.6/locale.py", line 202, in <module> import re, operator ImportError: /home/dropbox/.dropbox-dist/operator.so: undefined symbol: _PyUnicodeUCS2_AsDefaultEncodedString I'm running the current RHEL build of Python 2.6: root@cedar [/home/dropbox/.dropbox-dist]# rpm -qv python python-2.6.6-29.el6_3.3.x86_64 (I'm not sure if this would be better suited to Stack Overflow since it is on the verge of being a programming issue, but since I'm trying to use a program straight from Dropbox, I placed it here.)

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• How can I inject clips [ads] in a playlist every x minutes (even if previous clip is not over)

  - by azera

  Sorry for the title, I find it quite hard to describe what I want to do in a single sentence We have a few TV here linked to our computer, which we use to display clips about what we do in our sport center, what you should do to stay in good form ect ... It's running non stop, actually though vlc + playlist. Those main clips are 1-2 hours long and we have about 20 of them looping randomly all day. We would like to inject ads for some of our sponsiored products every now and then during the playlist, like say one ad every 15 minute. Does any one know how we can do that, while keeping the main clip random order ? I thought about encoding the whole thing as a single movie with ads inserted, but then it's not random. So we can put the ads in the playlist itself right ? Except clips are several hours long and we want that more often than that. Cutting the main clips in several pieces seems to work but that kind of sucks as new clips are made every month. If any one has an idea, thanks a lot

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• Setting http_proxy for Chromium in shell

  - by iceboal

  In order to set proxy in Chromium browser, one needs to go to Settings ? Under the Hood ? Change Proxy Settings ? Network Proxy. It's too complicated. How do I set http_proxy in shell? I've tried export http_proxy=http://127.0.0.1:8080/ But it doesn't seem to work. Also, if you only want to set the proxy on the Chromium browser -- not your entire network -- the command line is the only way to set the proxy just for the browser. How can one set the proxy on Chromium -- using the command line -- to solve this problem?

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• Proccess of carrying out a BER Test

  - by data

  I am subscribed to an ISP supplying a 3meg ADSL line. Lately (for the last 4 weeks) speeds have dropped from the usual average downstream speed of ~250kbps to just 0.14Mbps (according to speedtest.net) and employees are complaining about lack of access to the server. I have been calling customer support and logging calls for the last 3 weeks, but they have been unable to determine the source of the problem other carrying out a few bitstream tests and checking the DHCP renewal times. I am going to call back and suggest carrying out a BER test. What type of equipment is needed to carry out this test? I have access to a wide range of Cisco networking equipment. Other: We dont need a leased line as there are less than ten employees.

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• How do I start mysqld with options

  - by xiankai

  I need to start up mysqld with command line options as from here: http://dev.mysql.com/doc/refman/5.1/en/server-options.html#option_mysqld_skip-grant-tables I normally do sudo service mysqld start, but passing the option as sudo service mysqld start --skip-grant-tables does not seem to work. Alternatively I have tried starting as a daemon, sudo mysqld_safe --skip-grant-tables & But it seems to terminate too soon: 131101 04:59:57 mysqld_safe Logging to '/var/lib/mysql/vagrant.example.com.err'. 131101 04:59:57 mysqld_safe Starting mysqld daemon with databases from /var/lib/mysql 131101 05:00:03 mysqld_safe mysqld from pid file /var/lib/mysql/vagrant.example.com.pid ended My last option seems to specify the option in /etc/my.cnf instead, but is there any way to do it via the command line?

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• Creating a Scheduled Task that runs forever on Windows XP

  - by Mike Fiedler

  When I create a scheduled task, I do so via command line: schtasks.exe /Create /TN "startup-script" /TR "C:\startup.bat" /RU taskuser /RP taskpasswd /SC ONLOGON The idea is that this task run forever. The batch opens a java process that is never meant to end. I've used ONLOGON, as the machine auto-logs in as taskuser. All this works fine, for about 72 hours, after which the Duration flag kicks in and ends the process. Windows XP doesn't have the /DU flag on command line - is there an alternative method to creating a task that is meant to run from a system startup (doesn't even require logon) and runs forever, without touching a GUI?

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• when to upgrade server to include more cores, versus more processors, versus additional server?

  - by gkdsp

  The server hosting market is separated into single, double, qual, etc., processors, where each processor has several cores, or CPUs. My company will offer a Linux-based web application that relies on an Apache web server and a middle tier for business logic. The middle tier is used to crunch math, and return result to a client. Many clients may access the application simultaneously. The company will start with one processor having 4 cores. I'm trying to understand how the app uses the cores and then how to scale the application as business grows, in terms of servers/processors/cores. For example, I'd assume initially one core would be used for Apache, and the other 3 used to process client's requests for math crunching... Question 1: does that mean, with the 3 cores available, I can handle 3 separate client requests simultaneously (e.g. 1 for each of 3 cores)? I mean, except for the shared RAM, is this effectively like having 3 individual machines (from pt of view or processing client requests simulaneously)? Or, only one client's request may be processed at any one time, but that client's request is divided up into up to 3 cores depending on the type of process running that does the math crunching and whether or not it can take advantage of multi threading (so the # of cores impacts how fast any one client request completes)? I'm confused about what the cores mean to the application here. Question 2: As the business grows and more client requests need to be processed, should the server be upgraded to (A) a new machine with more cores, (B) a new machine with two processors, 4 cores each, or (C) keep the original server and add another server with a single processor? Which route provides the most efficient way to scale the application, in terms of processing more client requests per time interval? Is the choice, for example, limited by RAM (when you need more RAM than box can handle it's time to add another server), or something else? Question 3: Is the total number of client requests processed simultaneously equal to the number of cores times the number of servers (minus the one core for Apache)?

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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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• how to install OpenSSL in windows 7 and also how to check, its enabled or not?

  - by Andy

  how to install OpenSSL in windows 7 and also how to check, its enabled or not? I currently run php through the command line locally not on a server. Thanks I recently installed php 5.2.17 I ran a program which connect with a https server and I got the following error Notice: file_get_contents(): Unable to find the wrapper "https" - did you forget to enable it when you configured PHP? in C:\java\newsweaver-api-v2\simple\list- tags.php on line 30 I added extension=php_openssl.dll to php.ini but I'm wondering is openssl native to php 5.2.17 or do I need to download an extntion. Thanks

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• How can I make the NetworkManager work?

  - by Yang Jy

  I am running a version of RHCE6 on my laptop, and lately I've been trying various stuff about network configuration through command line. Last night, I tried removing the NetworkManager using "yum remove NetworkManager" from the system, so that I could have more control of the network through the command line. But the result is, I didn't manage to configure the wireless connection through wpa_supplicant, and I need wireless connection during my travel to another place. So I need the wireless function back as soon as possible. I typed " yum install NetworkManager", some version installed, but I don't get to have an icon on the taskbar, and of course, the network doesn't work. The package I previously removed(about 24MB) was much larger that the one I just installed(about 2MB), so I think some dependencies must be missing. How could I install all these dependencies? Please help!

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• MSSQL, ASP.NET, IIS. SQL Server perfmon log question

  - by Datapimp23

  Hi, I'm testing a web application that runs on a hypervisor. The database server and the webserver are seperate vm's that run on the same hypervisor. We did some tests and the functions perform ok. I want you guys to look at a screenshot of a permon log of the sql 2005 server on the busiest moment. The webserver perfmon log looks fine and it's obvious that we have enough resources to present the page in a timely fashion. http://d.imagehost.org/view/0919/heavyload http://d.imagehost.org/0253/heavyloadz.jpg Zoomed out The striped blue line maxing out is the Processor que length (scale 100,0) The green line at around value 30 is Available MBytes (scale 0,01) The rest of the counters are visible on the screenshot. The sql server machine has no CPU limitations on the hypervisor resources and has 5 vcpu's and 5 GB RAM. Can someone help me to interpret this log. Thanks

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• Formal separation marker of syslog events?

  - by Server Horror

  I've been looking at RFC5424 to find the formally specified marker that will end a syslog event. Unfortunately I couldn't find it. So If I wanted to implement some small syslog server that reacts on certain messages what is the marker that ends a message (yes commonly an event is a single line, but I just couldn't find it in the specification) Clarification: I call it event because I associate a message with a single line. An event could possibly be some thing like Type: foo Source: webservers whereas a message to me is this: Type: foo Source: webservers http://tools.ietf.org/html/rfc5424#section-6 defines: SYSLOG-MSG = HEADER SP STRUCTURED-DATA [SP MSG] neither STRUCTURED-DATA nor MSG tell me how these fields end. Especially MSG is defined as as MSG-ANY / MSG-UTF8 which expands to virtually anything. There's nothing that says a newline marks the end (or an 8 or an a for that matter). Given the example messages (section 6.5): This is one valid message, or 2 valid messages depending on wether you say that a HEADER element must never occur in any MSG element: literal whitespace <34>1 2003-10-11T22:14:15.003Z mymachine.example.com su - ID47 - <34>1 2003-10-11T22:14:15.003Z mymachine.example.com su - ID47 | is this an end marker? \t stands for a tab <34>1 2003-10-11T22:14:15.003Z mymachine.example.com su - ID47 -\t<34>1 2003-10-11T22:14:15.003Z mymachine.example.com su - ID47 | is this an end marker? \n stands for a newline <34>1 2003-10-11T22:14:15.003Z mymachine.example.com su - ID47 -\n<34>1 2003-10-11T22:14:15.003Z mymachine.example.com su - ID47 | is this an end marker? Either I'm misreading the RFC or there just isn't any mention. The sizes specified in the RFC just say what the minimum length is expected that I can work with...

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• Linux CentOS strange memory readings

  - by user2008937

  I am actually a young junior sys admin. I have a question - i am trying to understand how linux deals with memory... while playing around different monitoring programs I found some strange thing. When I run top on my laptop it shows me that FIREFOX process with pid 8778 takes 18,3% of memory (%MEM column). grep "MemTotal" /proc/meminfo Above command give me 1848336kb/1024 = 1805megs of memory (its ok - i have 2 gigs of ram). So if the firefox process takes 18,3% of MEM(according to tops %MEM column) then it takes 0.183 * 1805 which is approximately 325mb of memory. Quite a lot as for firefox... But well, in Linux there are lots of shared libraries that programs commonly uses (like famous libc). And those libraries are added to memory utilization of every process that uses it in the system, despite they are actually reading same file(single object in memory). So top may show too big mem utilization because of those shared libraries. Well, it is time to use PMAP which should show us the real mem utilization of process. But.. pmap -d $(pidof firefox) mapped: 983460K writeable/private: 757164K shared: 66416K so pmap shows that 983460/1024=993MB of memory is mapped to this process. It is in fact much bigger than mem utilization showed by top. Whats wrong here? How pmap can show more than top? even when top adds also the shared libraries (which in fact are single objects in memory) for each process that uses it? and pmap omits it? Regards Krzysztof

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• Server 2008 SP1 VSS Writers Not Responding

  - by Jason

  I've got a Windows Server 08 box on SP1 that is having some problems. We've experienced backup problems and I've traced it down to VSS Writers not responding. From the command line, if I type vssadmin list providers, I get Provider name: 'Microsoft Software Shadow Copy provider 1.0' Provider type: System Provider Id: {b5946137-7b9f-4925-af80-51abd60b20d5} Version: 1.0.0.7 If I type vssadmin list writers, I get this vssadmin 1.1 - Volume Shadow Copy Service administrative command-line tool (C) Copyright 2001-2005 Microsoft Corp. Waiting for responses. These may be delayed if a shadow copy is being prepared. I could wait this out for hours and it won't move. I looked up how Server 2008 handles VSS writers, and you can't reregister them like you could in Server 2003 http://social.technet.microsoft.com/Forums/en/windowsserver2008r2general/thread/062cc52c-899b-45f3-8d0c-798b92363f41 Does anyone know how to fix something like this or where to turn next?

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• IIS6 Log time recording problems

  - by Hafthor

  On three separate occasions on two separate servers at nearly the same times, 6.9 hours seemingly went by without any data being written to the IIS logs, but, on closer inspection, it appears that it was all recorded all at once. Here's the facts as I know them: Windows Server 2003 R2 w/ IIS6 Logging using GMT, server local time GMT-7. Application was still operating and I have SQL data to prove that Time gaps appear in log file, not across two # headers appear at gap Load balancer pings every 30 seconds No caching Here's info on a particular case: an entry appears for 2009-09-21 18:09:27 then #headers the next entry is for 2009-09-22 01:21:54, and so are the next 1600 entries in this log file and 370 in the next log file. about half of the ~2000 entries on 2009-09-22 01:21:54 are load balancer pings (est. at 2/min for 6.9hrs = 828 pings) then entries are recorded as normal. I believe that these events may coincide with me deploying an ASP.NET application update into those machines. Here's some relevant content from the logs in question: ex090921.log line 3684 2009-09-21 17:54:40 GET /ping.aspx - 80 404 0 0 3733 122 0 2009-09-21 17:55:11 GET /ping.aspx - 80 404 0 0 3733 122 0 2009-09-21 17:55:42 GET /ping.aspx - 80 404 0 0 3733 122 0 2009-09-21 17:56:13 GET /ping.aspx - 80 404 0 0 3733 122 0 2009-09-21 17:56:45 GET /ping.aspx - 80 404 0 0 3733 122 0 #Software: Microsoft Internet Information Services 6.0 #Version: 1.0 #Date: 2009-09-21 18:04:37 #Fields: date time cs-method cs-uri-stem cs-uri-query s-port sc-status sc-substatus sc-win32-status sc-bytes cs-bytes time-taken 2009-09-22 01:04:06 GET /ping.aspx - 80 404 0 0 3733 122 3078 2009-09-22 01:04:06 GET /ping.aspx - 80 404 0 0 3733 122 109 2009-09-22 01:04:06 GET /ping.aspx - 80 200 0 0 278 122 3828 2009-09-22 01:04:06 GET /ping.aspx - 80 200 0 0 278 122 0 2009-09-22 01:04:06 GET /ping.aspx - 80 200 0 0 278 122 0 ... continues until line 5449 2009-09-22 01:04:06 GET /ping.aspx - 80 200 0 0 277 122 0 <eof> ex090922.log #Software: Microsoft Internet Information Services 6.0 #Version: 1.0 #Date: 2009-09-22 00:00:16 #Fields: date time cs-method cs-uri-stem cs-uri-query s-port sc-status sc-substatus sc-win32-status sc-bytes cs-bytes time-taken 2009-09-22 01:04:06 GET /ping.aspx - 80 200 0 0 277 122 0 2009-09-22 01:04:06 GET /ping.aspx - 80 200 0 0 277 122 0 ... continues until line 367 2009-09-22 01:04:06 GET /ping.aspx - 80 200 0 0 277 122 0 2009-09-22 01:04:30 GET /ping.aspx - 80 200 0 0 277 122 0 ... back to normal behavior Note the seemingly correct date/time written to the #header of the new log file. Also note that /ping.aspx returned 404 then switched to 200 just as the problem started. I rename the "I'm alive page" so the load balancer stops sending requests to the server while I'm working on it. What you see here is me renaming it back so the load balancer will use the server. So, this problem definitely coincides with me re-enabling the server. Any ideas?

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• Tool to launch a script driven by modem activity

  - by Will M

  Can anyone suggest a software tool (preferably under Windows XP or later) that would launch an application or script in response to a phone call being received on a landline phone line connected to a data modem on the same PC? or, better, in response to a sequence of touch-tones being played over such a phone line. This would allow, for example, using the telephone to manipulate firewall settings so as to create another layer of security in connection with remote internet access to that computer. I seem to recall seeing tools to do this sort of thing in the days before broadband internet access, when there was more attention to various tips and tricks for the dial-up modem, but a few attempts at Google hasn't turned anything up.

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• Configure PL2303-based USB-to-RS232 adapter to stay awake when no active device is present

  - by casualuser

  I am resurrecting some X10 devices with the aid of a USB-to-RS232 adapter. The problem is, that the adapter only works with the Firecracker device when there is another serial device on the line (the Firecracker is a pass-through device that monitors the RTS and DTR lines to do its magic). Is the PL2303 going to sleep without a real device on the line? Is there an option or command to keep it awake? Is there a cable configuration that would make it work without a real serial device present?

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• -w test on OS X gives command not found error

  - by RobV

  I'm writing a bash script which I'm testing on OS X though it will ultimately run on a standard Linux environment and running into a weird error. I have tests like this in my script: if [ ! -w $BP ]; then echo "'$1' not writable" exit 1 fi Which seems pretty sane to me and works fine under Linux but when trying to test on OS X I get the following error message: startSvr.sh: line 135: [: missing `]' startSvr.sh: line 135: -w: command not found So is this a case of OS X not supporting the -w test or is there some other reason this isn't working for me? e.g. environment

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• Enabling openssl With PHP/nginx

  - by reefine

  I'm getting the following error when trying to connect to SMTP + SSL through PHP using nginx + PHP 5, Could not connect to smtp host 'ssl://smtp.gmail.com' (5) (Unable to find the socket transport "ssl" - did you forget to enable it when you configured PHP?) In phpinfo I see: OpenSSL support disabled (install ext/openssl) This leads me to believe I've installed OpenSSL incorrectly. I've read a bunch of places where I should uncomment the following line: extension = php_openssl.dll This line does not exist so I added it to the end of my php.ini to no avail. The php_openssl.dll file does not exist anywhere on my server.

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• What are the typical methods used to scale up/out email storage servers?

  - by nareshov

  Hi, What I've tried: I have two email storage architectures. Old and new. Old: courier-imapds on several (18+) 1TB-storage servers. If one of them show signs of running out of disk space, we migrate a few email accounts to another server. the servers don't have replicas. no backups either. New: dovecot2 on a single huge server with 16TB (SATA) storage and a few SSDs we store fresh mails on the SSDs and run a doveadm purge to move mails older than a day to the SATA disks there is an identical server which has a max-15min-old rsync backup from the primary server higher-ups/management wanted to pack in as much storage as possible per server in order to minimise the cost of SSDs per server the rsync'ing is done because GlusterFS wasn't replicating well under that high small/random-IO. scaling out was expected to be done with provisioning another pair of such huge servers on facing disk-crunch issues like in the old architecture, manual moving of email accounts would be done. Concerns/doubts: I'm not convinced with the synchronously-replicated filesystem idea works well for heavy random/small-IO. GlusterFS isn't working for us yet, I'm not sure if there's another filesystem out there for this use case. The idea was to keep identical pairs and use DNS round-robin for email delivery and IMAP/POP3 access. And if one the servers went down for whatever reasons (planned/unplanned), we'd move the IP to the other server in the pair. In filesystems like Lustre, I get the advantage of a single namespace whereby I do not have to worry about manually migrating accounts around and updating MAILHOME paths and other metadata/data. Questions: What are the typical methods used to scale up/out with the traditional software (courier-imapd / dovecot)? Do traditional software that store on a locally mounted filesystem pose a roadblock to scale out with minimal "problems"? Does one have to re-write (parts of) these to work with an object-storage of some sort - such as OpenStack object storage?

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