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• Is it possible to do a 301 redirect AND redirect to the requested resource?

  - by Pure.Krome

  For one of our projects, we're doing a rebranding of the website name, logo, etc... As such, we need to 301 Moved Permenantly redirect all users from the old domain to the new domain. With IIS7, that's pretty simple. We just create a new website that redirects all traffic to a host-headered domain .. to the new one. But this loses their original destination resource. eg. Old Domain: www.OldDomain.com New Domain: www.NewDomain.com User: www.OldDomain.com/user/PureKrome -> 301 --> www.newDomain.com Notice how it's going to the new domain BUT not to /user/PureKrome? How can I do this so it goes to the new domain and keeps the original resource request? I'm guessing URL-ReWriter for IIS7 might help? Also, what happens if I want to do this... CurrentDomain 1: Domain.com CorrectDomain 1: www.Domain.com CurrentDomain 2: AnotherDomain.com CorrectDomain 2: www.AnotherDomain.com Is it also possible to have those in the same IIS website? So any URL to domain.com will 301 to www.domain.com Right now I'm making 2 IIS websites, with a 301 hardcoded (which still means I lose the original resource request, too). Help!

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• Limited user requires admin rights for plug and play printer?

  - by Kalamane

  I have a small fleet of laptops that aren't part of a domain running Windows XP Pro SP3 as limited users. They are used for printing different shipping documents. I have a script that runs when they start up that uses devcon and prntmngr to detect and install/configure the currently connected usb printers. This lets us deploy the laptops to any printing station with a USB printer and have the printer 'just work' for the end user employee. I've taken the original clone image and have added functionality to it. Since then I've discovered a bit of an issue with using HP LaserJet P1606dn printers. They have started asking for admin rights on setup. This is with and without the script running. Previously they would automatically install because I had installed WHQL plug and play drivers for them. I thought it might have to do with the HP Smart Install Utility but it happens when that is disabled. I don't have a good point to roll back to before this started happening because this was an issue on the image I took initially to start this upgrade. What could be causing this?

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• What is the typical maximum number of database connections for Oracle running on Windows server ?

  - by Sake

  We are maintaining a database server that serve a large number of clients. Each client typically running serveral client-applications. The total number of connections to the database server (Oracle 9i) is reaching 800 connections on peak load. The windows 2003 server is starting to run out of memory. We are now planning to move to 64bit Windows in order to gain higher memory capability. As a developer I suggest moving to multi-tier architecture with conneciton pooling, which I believe is a natural solution to this problem. However, in order to support my idea, I want the information on: what exactly is the typical number of connections allowed for Oracle database ? What is the problem when the number connections is too high ? Too much memory comsumption ? or too many sockets opened ? or too many context switching between threads ? To be a little bit specific, how could Oracle Forms application scale to thousand of users without facing this problem ? Shall Oracle RAC applied to this case ? I'm sure the answer to this question should depend on quite a number of factors, like the exact spec of the hardware being used. I'm expecting a rough estimation or some experience from the real world.

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• Exchange Full Access issue

  - by Benjamin Jones

  I was just hired as a System Admin for a small company. They use Exchange 2010 for their Mail Server. I've never had a permission issue like this with Exchange because I worked for a larger firm with less responsibility before. Their old system admin is LONG GONE, so I can't ask him what he did. The issue: Right now ANYONE can gain access to a mailbox and view the mail in the mailbox. This is disabled by default you say and you have to grant them full access ? You are right, but the old System Admin I guess didn't know what he was doing. SO right now user A can open up user B mailbox with out being granted permission. So here is what I found out. Every user in EMC Full Access Permission has Exchange Server group granted. Within the Exchange Server Group, Domain User's is a Member Of. Within Domain User's all user's are listed as Members. So my guess is because of this all users can access ANY mailbox? Well GOOD News. The company is small (35 people) and they are not computer savvy, so hopefully no one has figured out they can open anyone's mailbox.(From what I can tell no). Next thing I did was with my domain user in EMC, delete Exchange Servers Group in FUll Access Permissions and grant access to my user. I made sure that my memeber was apart of the Exchange Server Group. Went to our OWA site and now I don't have permission to my own mailbox. Re did everything to the way it was with my user and now I'm stuck. Any help? I would think granting a single user that is in the Exchange Server group, Full Access to that mailbox would enable them to open that mailbox???? I guess I am wrong.

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• How to prevent an SSD from disappearing from BIOS

  - by Midimatt

  I've only recently upgraded my old machine to a new one with a brand new 60gb SSD as my boot drive and a 1TB main drive. Paranoid about completely breaking my SSD, I read up on a lot of issues that I needed to watch out for, including making sure AHCI was turned on and trim enabled. PC has been working fine for a few weeks now, until today. My wife was watching some TV on the machine when it started to act strange and eventually blue screened. She rebooted and the boot mgr was missing. When I got home from work I checked the BIOS and the drive had disappeared. I panicked and looked up some possible fixes, and I discovered a large amount of people having problems with the drive firmware, especially on OCZ Vertex and Agility drives, and my drive is an Agility 3 drive. The problems included blue screens followed by missing drives, and a solution was to reset the CMOS and try again. This worked, and now everything seems to be working fine. My question is, is there any way to prevent this from happening? Am I missing a setting for my SSD? All of the posts I found were from early to mid-2011 nothing for the end of 2011 to 2012. So I am wondering if I've missed anything. EDIT: Checked my drives firmware and it is 2.15, which has had issues reported by users.

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• Undo Google Sync in chrome

  - by iamcreasy

  I didn't know that my google account wasn't in sync with my chrome for the last couple of months and now that I have link again, the restored record is several months old. Now, that I've lost all my recent bookmarks and all other stuff...is there anything or anyway so I could revert the Google sync so I can get my bookmarks back? Update 1 I have found that under C:\Users\Profile_Name\AppData\Local\Google\Chrome\User Data\Default there is a file named Bookmarks.bak that holds the old state of my bookmarks before the sync. Update 2 Bookmarks is the file that holds the current(after sync) bookmark list. I replaced Bookmarks with Bookmarks.bak and restarted chrome, but still chrome isn't fetching information from the updated file. So, I have my old bookmark information, but how to restore it in chrome. Update 3 : solved I still couldn't figure out why replacing the bookmarks file didn't work and aparently that's the only solution available on web. I reinstalled everything and then copied the old bookmarks file. Then I got my bookmarks back again. Lession learned : Check regularly if google sync is working.

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• postfix email gateway

  - by k-h

  I am setting up a postfix email gateway. It will not hold any mail but will accept email for my domain and forward it to another internal mailserver and relay mail out from the internal server. One of the main problems is that I am working on a live running system and this will be an upgrade so I am using a test domain which I will change at some point to the real domain. I tried various methods but found the simplest way (that worked) was to use a script to create an aliases file (from ldap entries). There are various problems with this method. The main one being that the entries can't be of the simple form [email protected] because the gateway doesn't know where to send them. They have to be of the form: [email protected]. What I would like doesn't seem hard but I can't get my head around the postfix documentation. There seem to be various ways but none of them seem to work. Most of the examples I have found on the web assume the mail is going to end up on the server. I want a list of users somewhere, preferably of the form: user1, user2, etc rather than [email protected] (I can easily generate this list) and I would like postfix to forward all email to example.com to a particular server: ie realmailserver.example.com. Can anyone suggest clues as to how I might do this?

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• SQL Server Replication Backup

  - by user18039

  Hi We have a new system that runs on SQL Server 2008 r2 64-bit. There is a primary on-line transactional processing (OLTP) database that accepts a high volume of updates from several thousand Point of Sale systems at stores around the country. In order to protect this vital function, I have decided to introduce a dedicated reporting database server - from which multiple users will run some pretty complex reports. I realise that there were a number of choices but I decided to use Transaction Replication as the mechanism for copying the data from the OLTP database to the new reporting database - one way replication. The solution has worked well in test. I'm now being asked what changes need to be made to the backup policy to cover the architectural changes. I have read pages such as MSDN:Strategies for Backing Up and Restoring Snapshot and Transactional Replication but I think these are overkill for my solution. In fact, my current thinking is that we simply need to continue making backups of the OLTP data and logs. If the Reporting db or any of the system replication (eg distribution) databases fail then it's no big deal - we can clear all down then re-create the replication. I realise that taking a complete snapshot of the OLTP would be time consuming (approx 5 hours) but I'd be more relaxed about this that trying to restore backups of the various data and log files in the correct sequence. My view is that the complex strategies set out in the MSDN article would only be the way to go for a more complex replication solution than I have, eg if there were multiple subscribers with 2-way replication. Would you agree? I'd be grateful for any advice. Many thanks, Rob.,

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• Local user vs. domain user? What is the right way here?

  - by ebeeb

  I'm a software developer in a company with 6 employees. Everyone has a machine for him-/herself, so none of the machines is shared. I'm currently setting up my machine with Windows 8 and was experimenting a bit with domain and local user accounts. Correct me please if I'm wrong, but I think the idea behind is, that domain users generally should not be able to modify the configuration of a machine (like installing software), since they are able to login on every single machine in the domain. The local user (usually just one local administrator per machine) is the one who cares about the configuration of the machine. But in my case the login into the domain is just for being able to access directories/servers in the domain (I do not really know the details, all I know is, that loggin into the domain user account is necessary). So overall I've got a local admin account and a domain account used on my machine. While working I'm logged in to my domain user account. But it annoys me, that I always need to enter the credentials of my local user account when I'm about to update/install something, which happens quite often as a software developer. I fixed this with adding the domain account into the user accounts in my control panel and putting it into the Administrators group. The only thing I wanted to know about this: is there something REALLY bad about doing this? Or is there maybe a more common way to be able to act like a local admin, while logged in as a domain user? PS: I'm sorry about the tags, but I don't know the proper ones. I'd be glad if some of the superuser experts could fix this :-)

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• Scaling a LAMP website hosted on EC2

  - by Gublooo

  Hello, I'm very new to all this - I've recently managed to launch my website on EC2. As next step, I want to learn how to scale the website. I have a general idea but wanted some input from the experts about how to go about it. My website is based on LAMP but also has Red5 server which allows users to record messages and also used for playing them back. Currently this is the architecture I'm planning to setup for initial scaling. Deploy four small EC2 instances for the following purposes: Instance-1: On this instance I will run the MySql database Instance-2: On this instance I will run the red5 server Instance-3 & Instance-4 These 2 instances will be used to deploy the website and will have Apache running on them. They will communicate with the mysql server on Instance-1 and red5 server on Instance-2 using the internal IP address. As an when required, I will launch another instance of the same EBS - I will have EBS of say 50 GIG where all the mysql data will be stored. Also red5 will use this EBS to store the video messages Load-Balancer - Use the load balancer provided by Amazon to load balance Instance-3 and Instance-4 This is what I have in mind. I could be way off so please bear with me. Also I have not taken into account the case of scaling MySql server as I currently have no idea about how that will be done and whether or not it is necessary initially. I am aware that Amazon provides auto scaling and mysql scaling as well but I dont want to get into that right now. Your feedback is appreciated Thanks

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• How to modify a message, so it will be for 100% recognizable as spam by Exchange junk e-mail filter

  - by user71061

  Hi! I have an sendmail server, sitting in front of my Exchange server. This server filter spam with SpamAssassin (and do it incredibly well!), but it merely tag spam messages with appropriate header flags and by modifying message subject. When such a message arrives to user mailbox on Exchange server, where it is examined by Echange/Outlook junk e-mail filter, which put most of spam in junk message folder. And that is my problem: most, but not all! To put all spam in junk e-mail message folder, user has to define an rule, saying f.e: "If header contains text 'X-Spam-Flag: YES' then move it to 'Junk e-mail messages' folder". Fine, but it has to be done on every user (for some users, this task is too "complicated" to made it themselves :-) . So I want to know, how could I modify message header in such a way, that Exchange junk e-mail filter will for 100% recognize this message as a spam, freeing user from task of defining his own rule. Some solution could be defining such a rule by using AD and group policy, but I wan't to avoid this due to many possible caveats: there are so many combination of different operating system and different Outlook versions, and to be honest, I doubt if it is even possible.

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• What are the best linux permissions to use for my website?

  - by Nic

  This is a Canonical Question about File Permissions on a Linux web server. I have a Linux web server running Apache2 that hosts several websites. Each website has its own folder in /var/www/. /var/www/contoso.com/ /var/www/contoso.net/ /var/www/fabrikam.com/ The base directory /var/www/ is owned by root:root. Apache is running as www-data:www-data. The Fabrikam website is maintained by two developers, Alice and Bob. Both Contoso websites are maintained by one developer, Eve. All websites allow users to upload images. If a website is compromised, the impact should be as limited as possible. I want to know the best way to set up permissions so that Apache can serve the content, the website is secure from attacks, and the developers can still make changes. One of the websites is structured like this: /var/www/fabrikam.com /cache /modules /styles /uploads /index.php How should the permissions be set on these directories and files? I read somewhere that you should never use 777 permissions on a website, but I don't understand what problems that could cause. During busy periods, the website automatically caches some pages and stores the results in the cache folder. All of the content submitted by website visitors is saved to the uploads folder.

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• Exchange on SBS2003 not receiving mail, but sending via telnet works

  - by YDdraigLas

  Last week we had a problem on our SBS2003 server where our external connection dropped out and I was only able to restore it by running netsh winsock reset catalog and netsh int ip reset. Thinking all was well, I went home for the weekend and came in today to find that we haven't received any external emails since before the original problems occurred. There are plenty of examples of this on the internet, usually to do with a firewall issue, but the odd thing here is that when I connect using telnet I can send an email and it goes straight through and into my inbox. When I send an email from Gmail or Hotmail nothing comes through at all. Internal emails are also unaffected, as are outgoing emails. There have also been a couple of emails that have come through for other users, both out-of-office replies, if that's relevant. I've run the CEICW several times, checked all the NIC settings, but no joy. Before I give up trying to fix this and reinstall the whole server, has anyone come across this problem before? I have only found fleeting references to this in previous searches and no real answers. Any advice gratefully received.

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• Servers - Buying New vs Buying Second-hand

  - by Django Reinhardt

  We're currently in the process of adding additional servers to our website. We have a pretty simple topology planned: A Firewall/Router Server infront of a Web Application Server and Database Server. Here's a simple (and technically incorrect) diagram that I used in a previous question to illustrate what I mean: We're now wondering about the specs of our two new machines (the Web App and Firewall servers) and whether we can get away with buying a couple of old servers. (Note: Both machines will be running Windows Server 2008 R2.) We're not too concerned about our Firewall/Router server as we're pretty sure it won't be taxed too heavily, but we are interested in our Web App server. I realise that answering this type of question is really difficult without a ton of specifics on users, bandwidth, concurrent sessions, etc, etc., so I just want to focus on the general wisdom on buying old versus new. I had originally specced a new Dell PowerEdge R300 (1U Rack) for our company. In short, because we're going to be caching as much data as possible, I focussed on Processor Speed and Memory: Quad-Core Intel Xeon X3323 2.5Ghz (2x3M Cache) 1333Mhz FSB 16GB DDR2 667Mhz But when I was looking for a cheap second-hand machine for our Firewall/Router, I came across several machines that made our engineer ask a very reasonable question: If we stuck a boat load of RAM in this thing, wouldn't it do for the Web App Server and save us a ton of money in the process? For example, what about a second-hand machine with the following specs: 2x Dual-Core AMD Opteron 2218 2.6Ghz (2MB Cache) 1000Mhz HT 16GB DDR2 667Mhz Would it really be comparable with the more expensive (new) server above? Our engineer postulated that the reason companies upgrade their servers to newer processors is often because they want to reduce their power costs, and that a 2.6Ghz processor was still a 2.6Ghz processor, no matter when it was made. Benchmarks on various sites don't really support this theory, but I was wondering what server admin thought. Thanks for any advice.

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• Excel hyperlinks can be attached to a range of cells -- what is the use case for this?

  - by John Machin

  In Excel 2003 and 2007 (and presumably 2010), it is possible to attach a hyperlink to a single cell; this is well known. Excel also allows you select a range for insertion. In that case, clicking on any cell in the range will jump to the target of the hyperlink. I can't find any web reference to this possibility. My question is: What is the use case for being able to do this? My only suggestion: The first worksheet is a menu for the remainder of the workbook. Each worksheet or topic has a hyperlink on the menu sheet. Each hyperlinks occupies a 3x3 range of cells to make it easier for users in a hurry to click on the correct link. A side question: Interestingly, Excel allows you to overlap ranges. Example: Link from A1:C3 to file1. Then link from B2:D4 to file2. The overlapped cells (B2:C3) now point to file2. Only A1, A2, A3, B1, and C1 now point to file1. No warning is given about the overlap. What is the rationale for this behaviour?

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• How to route outbound traffic to specific domain "XYZ.org" via a specific NIC or public/static IP?

  - by user139943

  Within the next week or so, I'll be setting up an AT&T U-verse modem with 5 usable static public IP addresses. I plan to register a domain name to 1 of the 5 static IPs (remaining 4 unregistered), and run a website from a single server setup in my home LAN. I'll skip the long winded reason why, but I need to somehow route outbound traffic (originating from my server) destined for one public domain (i.e. http://www.sample.org) through one of the UNREGISTERED static IP addresses ONLY. Basically, I want this public domain to see connections coming from an IP address and not my domain name. If it makes it easier, this can apply to all outbound traffic from my server as long as it doesn't impact users browsing my website! Inbound connections should go through the domain name / registered public IP. Can I accomplish this with my single server with one or multiple NICs? Do I need multiple servers and set one up as a proxy? Please help as my background is in software and not networking, and I don't think I can accomplish this at a software level (e.g. Java). Thanks.

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• Win 7 Remote Desktop connection failure when already logged in.

  - by Andy E

  I have a bit of a strange problem, magnified recently by my broadband dropouts. I wasn't sure whether to post this on SU or SF, so I thought I'd start here as more users would be likely to know what the problem is. In short, when I try and connect to my server (Windows Server 2008) from my laptop running Windows 7, I can only connect if my remote account was previously logged out. If I'm still logged in I get the error message: Windows cannot connect to the remote server. No explanation or anything. If my IP address is the same, I don't have this problem. If I boot up Windows XP Mode and run XP's remote desktop connection it works just fine -- I think the difference there is it takes me to the remote server's logon screen. With Win 7 RDC you never see the logon screen, it asks you for credentials before entering full screen mode. The real problem is that I'm having random broadband dropouts and my IP isn't static. If I logon via Win XP RDC, log out and then run Win 7 RDC then it works fine. I realize I can just use Win XP's RDC for now, but I don't really like keeping XP Mode open if I can help it. Does anyone know a way around this problem? Maybe forcing Win 7 RDC to go to the logon screen, or changing some server-side settings to work around the IP address issue?

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• How to optimize a postgreSQL server for a "write once, read many"-type infrastructure ?

  - by mhu

  Greetings, I am working on a piece of software that logs entries (and related tagging) in a PostgreSQL database for storage and retrieval. We never update any data once it has been inserted; we might remove it when the entry gets too old, but this is done at most once a day. Stored entries can be retrieved by users. The insertion of new entries can happen rather fast and regularly, thus the database will commonly hold several millions elements. The tables used are pretty simple : one table for ids, raw content and insertion date; and one table storing tags and their values associated to an id. User search mostly concern tags values, so SELECTs usually consist of JOIN queries on ids on the two tables. To sum it up : 2 tables Lots of INSERT no UPDATE some DELETE, once a day at most some user-generated SELECT with JOIN huge data set What would an optimal server configuration (software and hardware, I assume for example that RAID10 could help) be for my PostgreSQL server, given these requirements ? By optimal, I mean one that allows SELECT queries taking a reasonably little amount of time. I can provide more information about the current setup (like tables, indexes ...) if needed.

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• SSH & SFTP: Should I assign one port to each user to facilitate bandwidth monitoring?

  - by BertS

  There is no easy way to track real-time per-user bandwidth usage for SSH and SFTP. I think assigning one port to each user may help. Idea of implementation Use case Bob, with UID 1001, shall connect on port 31001. Alice, with UID 1002, shall connect on port 31002. John, with UID 1003, shall connect on port 31003. (I do not want to lauch several sshd instances as proposed in question 247291.) 1. Setup for SFTP: In /etc/ssh/sshd_config: Port 31001 Port 31002 Port 31003 Subsystem sftp /usr/bin/sftp-wrapper.sh The file sftp-wrapper.sh starts the sftp server only if the port is the correct one: #!/bin/sh mandatory_port=3`id -u` current_port=`echo $SSH_CONNECTION | awk '{print $4}'` if [ $mandatory_port -eq $current_port ] then exec /usr/lib/openssh/sftp-server fi 2. Additional setup for SSH: A few lines in /etc/profile prevents the user from connecting on the wrong port: if [ -n "$SSH_CONNECTION" ] then mandatory_port=3`id -u` current_port=`echo $SSH_CONNECTION | awk '{print $4}'` if [ $mandatory_port -ne $current_port ] then echo "Please connect on port $mandatory_port." exit 1 fi fi Benefits Now it should be easy to monitor per-user bandwidth usage. A Rrdtool-based application could produce charts like this: I know this won't be a perfect calculation of the bandwidth usage: for example, if somebody launches a bruteforce attack on port 31001, there will be a lot of traffic on this port although not from Bob. But this is not a problem to me: I do not need an exact computation of per-user bandwidth usage, but an indicator that is approximately correct in standard situations. Questions Is the idea of assigning one port for each user is a good one? Is the proposed setup an reliable one? If I have to open dozens of ports for many users, should I expect a performance drawback? Do you know a rrdtool-based application which could make the chart above?

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• What I should know about memory management?

  - by bua

  first of all: I don't use stackadmin or similar so please don't vote for moving there, I'm reading man top and paper "what every programmer should know about memory ..." I need really simple explanation like for retard ;) Having following top dump: top - 11:21:19 up 37 days, 21:16, 4 users, load average: 0.41, 0.75, 1.09 Tasks: 313 total, 5 running, 308 sleeping, 0 stopped, 0 zombie Cpu(s): 0.4%us, 0.6%sy, 0.9%ni, 96.2%id, 0.1%wa, 0.0%hi, 1.9%si, 0.0%st Mem: 132103848k total, 131916948k used, 186900k free, 54000k buffers Swap: 73400944k total, 73070884k used, 330060k free, 13931192k cached PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND 3305 tudb 25 10 144m 52m 940 R 6.0 0.0 1306:09 app 3011 tudb 15 0 71528 19m 604 S 3.3 0.0 171:57.83 app 3373 tudb 25 10 209m 93m 940 S 3.0 0.1 1074:53 app 3338 tudb 25 10 144m 47m 940 R 2.7 0.0 780:48.48 app 4227 tudb 25 10 208m 99m 904 S 1.3 0.1 198:56.01 app 8506 tudb 25 10 80.7g 49g 932 S 2.0 39.6 458:31.22 app I'm wondering what is: RES (my expl. physical memory consumption ? see 49GB) VIRT (memory mapped disk to cache? see 80GB) SHR (shared pages?) Swap: (is this cached label - for memory mapped disk into swap cache?) Should sum of RES give MEM: X used? or maybe sum of VIRT?

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• MysqlTunner and query_cache_size dilemma

  - by wbad

  On a busy mysql server MySQLTuner 1.2.0 always recommends to add query_cache_size no matter how I increase the value (I tried up to 512MB). On the other hand it warns that : Increasing the query_cache size over 128M may reduce performance Here are the last results: >> MySQLTuner 1.2.0 - Major Hayden <[email protected]> >> Bug reports, feature requests, and downloads at http://mysqltuner.com/ >> Run with '--help' for additional options and output filtering -------- General Statistics -------------------------------------------------- [--] Skipped version check for MySQLTuner script [OK] Currently running supported MySQL version 5.5.25-1~dotdeb.0-log [OK] Operating on 64-bit architecture -------- Storage Engine Statistics ------------------------------------------- [--] Status: +Archive -BDB -Federated +InnoDB -ISAM -NDBCluster [--] Data in InnoDB tables: 6G (Tables: 195) [--] Data in PERFORMANCE_SCHEMA tables: 0B (Tables: 17) [!!] Total fragmented tables: 51 -------- Security Recommendations ------------------------------------------- [OK] All database users have passwords assigned -------- Performance Metrics ------------------------------------------------- [--] Up for: 1d 19h 17m 8s (254M q [1K qps], 5M conn, TX: 139B, RX: 32B) [--] Reads / Writes: 89% / 11% [--] Total buffers: 24.2G global + 92.2M per thread (1200 max threads) [!!] Maximum possible memory usage: 132.2G (139% of installed RAM) [OK] Slow queries: 0% (2K/254M) [OK] Highest usage of available connections: 32% (391/1200) [OK] Key buffer size / total MyISAM indexes: 128.0M/92.0K [OK] Key buffer hit rate: 100.0% (8B cached / 0 reads) [OK] Query cache efficiency: 79.9% (181M cached / 226M selects) [!!] Query cache prunes per day: 1033203 [OK] Sorts requiring temporary tables: 0% (341 temp sorts / 4M sorts) [OK] Temporary tables created on disk: 14% (760K on disk / 5M total) [OK] Thread cache hit rate: 99% (676 created / 5M connections) [OK] Table cache hit rate: 22% (1K open / 8K opened) [OK] Open file limit used: 0% (49/13K) [OK] Table locks acquired immediately: 99% (64M immediate / 64M locks) [OK] InnoDB data size / buffer pool: 6.1G/19.5G -------- Recommendations ----------------------------------------------------- General recommendations: Run OPTIMIZE TABLE to defragment tables for better performance Reduce your overall MySQL memory footprint for system stability Increasing the query_cache size over 128M may reduce performance Variables to adjust: *** MySQL's maximum memory usage is dangerously high *** *** Add RAM before increasing MySQL buffer variables *** query_cache_size (> 192M) [see warning above] The server has 76GB ram and dual E5-2650. The load is usually below 2. I appreciate your hints to interpret the recommendation and optimize the database configs.

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• Zero downtime deployment (Tomcat), Nginx or HAProxy, behind hardware LB - how to "starve" old server?

  - by alexeypro

  Currently we have the following setup. Hardware Load Balancer (LB) Box A running Tomcat on 8080 (TA) Box B running Tomcat on 8080 (TB) TA and TB are running behind LB. For now it's pretty complicated and manual job to take Box A or Box B out of LB to do the zero downtime deployment. I am thinking to do something like this: Hardware Load Balancer (LB) Box A running Nginx on 8080 (NA) Box A running Tomcat on 8081 (TA1) Box A running Tomcat on 8082 (TA2) Box B running Nginx on 8080 (NB) Box B running Tomcat on 8081 (TB1) Box B running Tomcat on 8082 (TB2) Basically LB will be directing traffic between NA and NB now. On each of Nginx's we'll have TA1, TA2 and TB1, TB2 configured as upstream servers. Once one of the upstreams's healthcheck page is unresponsive (shutdown) the traffic goes to another one (HttpHealthcheckModule module on Nginx). So the deploy process is simple. Say, TA1 is active with version 0.1 of the app. Healthcheck on TA1 is OK. We start TA2 with Healthcheck on it as ERROR. So Nginx is not talking to it. We deploy app version 0.2 to TA2. Make sure it works. Now, we switch the Healthcheck on TA2 to OK, switch Healthcheck to TA1 to ERROR. Nginx will start serving TA2, and will remove TA1 out of rotation. Done! And now same with the other box. While it sounds all cool and nice, how do we "starve" the Nginx? Say we have pending connections, some users on TA1. If we just turn it off, sessions will break (we have cookie-based sessions). Not good. Any way to starve traffic to one of the upstream servers with Nginx? Thanks!

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• Google Apps Domain Level Shared Contacts?

  - by dkirk

  My firm just switched to Google Apps Premiere addition 2 weeks ago and aside from the way Google handles shared contacts, things are going quite well. Previously, on our Exchange server we had numerous shared contact lists set up in the shared folders. We had a separate list for vendors, sales agents, etc.. Is there not a way to set up lists or groups such as this on the domain level in Google Apps? I have found a ton of forums with users asking the same question but no good answers unless you purchase some third party app in the marketplace. I have toyed around with the "google-shared-contacts-client" here: http://code.google.com/p/google-shared-contacts-client/ and this almost does it but it falls short when trying to group contacts on the domain level or when trying to search for a contact by company name. Are either of these things possible? I am now looking to create a Google Doc spreadsheet to share with the domain just to have a separated defined list of contacts that is search-able by various fields... Anyone who could shed some light on domain level contact sharing relating to the points above, I would be most grateful...

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• How is it possible to list all folders that a particular user/group has permissions on?

  - by Lord Torgamus

  Is it possible to list all folders/files that a given group has explicit permissions on, for a machine running Windows Server 2003? If so, how? It would be nice to see inherited permissions as well, but I could do with just explicit permissions. A little background: I'm trying to update groups/permissions on a test server. One of the groups, Devs, wasn't implemented correctly when it was created, and my goal is to remove it from the system. It has been replaced by LeadDevelopers, which has permissions on many — but naturally not all — of the same folders. I want to make sure that I don't accidentally orphan any folders or cause any other issues when I remove Devs. It did have some admin-level permissions. EDIT: The answers so far — at least *cacls and AccessEnum — provide a way to find out which groups/users have permissions on known directories/files. I actually want the reverse of this behavior: I know the group, and I'm looking for the directories/files for which the group has permissions. Also, as I noted in a comment, the Devs group is not itself a member of any other group.

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• How to redirect or rewrite IIS site with port in URL to URL without port?

  - by user2573690

  I'm not 100% sure if this is the right part of StackOverflow to post this but to me it made the most sense. Sorry if its not! Currently I have a site in IIS configured on HTTPS with port 7500. I can access this site by using the URL: https://portal.company.com:7500. What I would like to do is remove the port number at the end of the URL so users can access this site using https://portal.company.com... I am a complete beginner with IIS, but what I have tried is the HTTP Redirect, which if I used on this IIS site, would redirect a user that hits portal.company.com:7500 to some other site, which is not what I need. Another thing I have though about is creating another IIS site which serves the purpose of being at the URL portal.company.com and when its hit, it redirects to my portal.company.com:7500, but I don't know if this is the best approach. So my question is, what are my options for achieving the behavior mentioned above and what is the best/recommended approach? I haven't played with URL Rewriting before but I will look into that now while I wait for a reply. Thanks!! Using IIS Manager on a Windows Server 2008 machine.

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