Search Results

Search found 65851 results on 2635 pages for 'simple php blog'.

Page 560/2635 | < Previous Page | 556 557 558 559 560 561 562 563 564 565 566 567  | Next Page >

  • Looking for a short term solution to improve website performance with additional server

    - by Tanim Mirza
    I am working with a small team to run an internal website running with PHP 5.3.9, MySQL 5.0.77. All the files and database are hosted on a dedicated Linux machine with the following configuration: Intel Xeon E5450 8 CPU cores @3.00GHz, 2992.498 MHz, Cache 6148 KB, Cent OS – Red Hat Enterprise Linux Server release 5.4 We started small and then the database got bigger and now the website performance degraded significantly. We often get server space overrun, mysql overloaded with too many calls, etc. We don't have much experience dealing with these issues. We recently got another server that we were thinking to use to improve performance. Since it has better configuration, some of us wanted to completely move everything to the new machine. But I am trying to find out how we can utilize both machine for optimized performance. I found options such as MySQL clustering, Load balancer, etc. I was wondering if I could get any suggestion for this situation "How to utilize two machines in short term for best performance", that would be great. By short term we are looking for something that we can deploy in a month or so. Thanks in advance for your time.

    Read the article

  • MySQL as a simple Mac application for development

    - by Thilo
    What is the easiest way to run MySQL for development purposes on the Mac? Ideal would be a server embedded in a Mac application, that starts when you press a start button, and stops when you quit the app? I do not need a background service running, I do not want to have to be an admin user to install or run, I do not want files spread out all over the disk (everything should be in the App bundle and the Documents folder).

    Read the article

  • Body of email breaks distribution list in exchange?

    - by widgisoft
    Hi, I have a very odd problem that I'm not sure is a programming issue or a server issue :-p. Basically I'm sending an email to an exchange distribution list that includes a PHP stack trace; during certain faults the trace includes really high level information such as the machine's environment variables (during file reads, etc.). I went through a copy of the email line by line until the email sent and it appears the line: [SUDO_COMMAND] => /etc/init.d/httpd restart is the culprit. Adding a string replacement in before the email is sent allows a successful send. What I don't understand is WHY these stream of characters are causing the issue ONLY on the distribution email. If I send the email to myself as well, i.e. "[email protected]; [email protected]", then I get the email fine. Re-ordering the list doesn't make a difference the group never gets the email. Because the individual gets the email and not the group I'm assuming the fault is with exchange and some rogue filtering - I've gone through it with the sysadmins and there's no filtering of any sort on that group... so maybe it's a bug? I can't find anyone else having recorded this specific fault so I figured I'd open it here. For now I'm just not using the distribution list but it'd be nice to eventually find the solution. Many thanks, Chris

    Read the article

  • Simple Image Capture Tool for Mac OS X that uses FireWire

    - by Justin Dearing
    I have Leopard (Mac OS X 10.5) on a G4 Powerbook and a camcorder with a firewire device. It doesn't have iMovie, which is now part of the separate iLife Suite and requires an Intel Mac. Anyway, Image Capture does not recognize the firewire video feed as an image capture device. What software would give me the simplest "capture this frame from live firewire video feed to image" functionality.

    Read the article

  • Simple copy to pen-drive - 0x80070057

    - by yzraeu
    Hello guys, I have this problem for a while and still didn't find the answer. I'm copying a specifc 10mb file to my pen-drive, from any folder on PC to any folder on the pen-drive and all i get is this: 0x80070057 The parameter is incorrect I simply cannot copy the file at all!! The pen-drive in case is my Nokia 5800, in "Mass Storage" mode. Sometimes I cannot copy a single MP3 file, 5 or 7mb. So i have to disconnect and connect again. The source file is not corrupted, the destination works fine with other files. It's just with some files. If I change to another pen-drive, works fine.

    Read the article

  • How to setup a simple self-hosted dynamic DNS server

    - by Cerin
    I have a small internal network of physical machines running hypervisors, which in turn run several KVM Ubuntu virtual machines. How would I setup an internal dynamic DNS server so that when I run a script to create a new virtual machine, that VM could automatically register itself in the DNS server? Bind seems to be the standard DNS server for Linux, but it seems designed for a much more "static" DNS model. Dynamically updating this would require a complicated script that would have to SSH into the DNS server, edit configuration files, and then restart the server. This doesn't seem like a very elegant solution. Are there better options? I saw a similar question, although they're asking for a solution for a public setting on Amazon. My servers are entirely private, and I don't want to rely on an external VM host or Dynamic DNS provider.

    Read the article

  • Webserver optimization

    - by f-aminov
    Hi guys! I have a website hosted on a VPS (512Mb - minimum guranteed memory, 510Mhz proccessor, Debian 5.0 Lenny, Apache 2.2.9 with nginx 0.7.65 as a frontend to serve static content, MySQL 5.1.44, PHP 5.3.2 with APC caching). I'm a web developer, so I'm not very good at optimizing servers, but I've managed to install and setup all those neccessary components (LAMP, nginx, etc.). After that I decided to stress test my website (which uses Drupal 6.16 with caching and all possible optimization enabled) using a utility called "Webserver Stress Tool 7". And it seems to me that the results aren't any good - here is a graph (sorry, as a new user I'm not allowed to post images) As you can see the response time depending on amount of simultaneous users increases very quickly. With 10 simultaneous users the time is about 1000ms, with 100 simultaneous users it's about 15000ms (15s!). The question is do you think this is normal behavior for such a server or something is wrong with the settings and optimization? If you think something is wrong what particulary could be wrong? Any other suggestion how to speed this a little bit up?

    Read the article

  • Why is this APC installation failing so badly?

    - by Matt
    I have multiple instances of APC running on my server with similar configurations (albeit with different cache sizes. However, one of the instances is performing extremely poorly, and I have no idea why (100% cache fragmentation, high miss rate). The runtime settings I'm using are as follows (pretty much out of the box): apc.cache_by_default 1 apc.canonicalize 1 apc.coredump_unmap 0 apc.enable_cli 0 apc.enabled 1 apc.file_md5 0 apc.file_update_protection 2 apc.filters apc.gc_ttl 3600 apc.include_once_override 0 apc.lazy_classes 0 apc.lazy_functions 0 apc.max_file_size 1M apc.mmap_file_mask apc.num_files_hint 1000 apc.preload_path apc.report_autofilter 0 apc.rfc1867 0 apc.rfc1867_freq 0 apc.rfc1867_name APC_UPLOAD_PROGRESS apc.rfc1867_prefix upload_ apc.rfc1867_ttl 3600 apc.shm_segments 1 apc.shm_size 10M apc.slam_defense 1 apc.stat 1 apc.stat_ctime 0 apc.ttl 0 apc.use_request_time 1 apc.user_entries_hint 4096 apc.user_ttl 0 apc.write_lock 1 APC is version 3.1.6, PHP is 5.3.3-1ubuntu9.5. I've tried restarting Apache multiple times, so this isn't a freak instance. The instance with problems is simply running Wordpress with a few plugins installed. All other instances (~4) on the server are running perfectly fine with almost 100% hit rates and 0% fragmentation; for example this instance is holding a website built using the Symfony framework. Any help would be much appreciated; I haven't had much experience with APC and was hoping for it to be an out-of-the-box speed boost ;).

    Read the article

  • User Receiving Partial Downloads

    - by JGB146
    Some background: I run a subscription-based poker strategy video website. Our videos range in length from 30 mins up to 80 mins, and in size from 20MB up to 500MB. The site is on a shared server with hostmonster.com One of my users is having problems downloading some of the larger video file. He reports problems with anything over 100MB. Basically, he's only getting part of the file, which means that the video stops before the end. He has tried multiple computers from multiple locations. He reports that he is able to successfully download 500MB files from other sites. He is using Internet Explorer (version unknown) as his browser. I have suggested that he try Firefox or Chrome to see if their download managers work any better for him, but as of yet I have not heard anything back. He has also reported that his downloads do not report any filesize. I see the same thing (no file size reported), but I have not experienced any problems with the downloads themselves. We pass the downloads through a php script which verifies login information and records the download to our database before returning the file. I suspect this is why there is no filesize reported. What else should I ask the user? What other things could he or I try?

    Read the article

  • Simple SSH public/private key question

    - by James R.
    I am trying to learn this instead of just following guides so I can recommend proper actions when people do ask (and they do). Here is what I got down. First, generate both key with command such as this: ssh-keygen -b 2048 -t rsa -C comment -f ~/.ssh/id_rsa Then you push the public part of the key into authorized_keys2 file cat ~/.ssh/id_rsa.pub >> ~/.ssh/authorized_keys2 (and then chmod it to 600 or similar) And you download the private key to your computer (id_rsa) and feed that in to Putty to be read and authenticate. Are these the correct steps to setting this public/private key authentication for passwordless login to SSH?

    Read the article

  • Connection reset by peer: mod_fcgid: error reading data from FastCGI server Issues

    - by user145857
    Help is greatly needed for our server. We are experiencing random "Connection reset by peer: mod_fcgid: error reading data from FastCGI server" errors which cause a 500 internal server error. If the page is then reloaded it loads normally as it should. We are running MPM Worker with mod FCGID to handle PHP. We had APC cache enabled but disabled it recently to see if it would fix the problem, but the random mod FCGID errors are still continuing. No other opcode cache is active now. Our settings are below: <IfModule worker.c> MinSpareThreads 25 MaxSpareThreads 150 ThreadsPerChild 25 ThreadLimit 100 ServerLimit 700 MaxClients 700 MaxRequestsPerChild 0 </IfModule> <IfModule mod_fcgid.c> FcgidMaxRequestLen 1073741824 FcgidMaxRequestsPerProcess 2000 FcgidMaxProcessesPerClass 100 FcgidMinProcessesPerClass 0 FcgidConnectTimeout 300 FcgidIOTimeout 900 FcgidFixPathinfo 1 FcgidIdleTimeout 300 FcgidIdleScanInterval 120 FcgidBusyTimeout 300 FcgidBusyScanInterval 120 FcgidErrorScanInterval 12 FcgidZombieScanInterval 12 FcgidProcessLifeTime 3600 </IfModule> The server is a 64 core 2.1 GHZ 94 GB RAM so it has some power. Some of the fcgid timeout settings are higher because we run large reports which take up to 15 minutes. Any help is greatly appreciated! Just to clarify, the random fcgid errors are occurring when a user clicks a page on our site and the 500 error page loads instantly. This is random and occurrs less than 1% of the time but it is still an issue.

    Read the article

  • Simple tool to graph memory usage?

    - by dbr
    Is there a script that will show memory usage as a graph, for example as a pie-chart, with each process being being a separate slice? I'm not looking for something like Munin to graph memory usage over time, but rather show the memory usage per-process at a single point in time. To make my request even more obscure, it is for a headless server (so no X applications). The simplest way would be to write a PNG file, or possibly an HTML file (which could use Javascript to allow the filtering of processes, changing between graph-types and so on)

    Read the article

  • vhost configuration for owncloud

    - by Razer
    I'm using apache2 for hosting owncloud. I configured a vhost file for owncloud, but every time I go on the site my browser downloads a ruby file. Here is my vhost configuration: <VirtualHost *:80> ServerAdmin webmaster@localhost ServerName http://rsserver.fritz.box DocumentRoot /var/www/owncloud/ <Directory /var/www/owncloud/> Options Indexes FollowSymLinks MultiViews AllowOverride All Order allow,deny allow from all </Directory> ScriptAlias /cgi-bin/ /usr/lib/cgi-bin/ <Directory "/usr/lib/cgi-bin"> AllowOverride None Options +ExecCGI -MultiViews +SymLinksIfOwnerMatch Order allow,deny Allow from all </Directory> ErrorLog ${APACHE_LOG_DIR}/error.log # Possible values include: debug, info, notice, warn, error, crit, # alert, emerg. LogLevel warn CustomLog ${APACHE_LOG_DIR}/access.log combined Alias /doc/ "/usr/share/doc/" <Directory "/usr/share/doc/"> Options Indexes MultiViews FollowSymLinks AllowOverride None Order deny,allow Deny from all Allow from 127.0.0.0/255.0.0.0 ::1/128 </Directory> </VirtualHost> Apache error log tells me: [Sat Jun 16 20:46:04 2012] [error] [client xx.xx.xx.xx] Options FollowSymLinks or SymLinksIfOwnerMatch is off which implies that RewriteRule directive is forbidden: /var/www/owncloud/core/templates/403.php mod_rewrite is enabled. Where is the problem?

    Read the article

  • simple and reliable centralized logging inside Amazon VPC

    - by Nakedible
    I need to set up centralized logging for a set of servers (10-20) in an Amazon VPC. The logging should be as to not lose any log messages in case any single server goes offline - or in the case that an entire availability zone goes offline. It should also tolerate packet loss and other normal network conditions without losing or duplicating messages. It should store the messages durably, at the minimum on two different EBS volumes in two availability zones, but S3 is a good place as well. It should also be realtime so that the messages arrive within seconds of their generation to two different availability zones. I also need to sync logfiles not generated via syslog, so a syslog-only centralized logging solution would not fulfill all the needs, although I guess that limitation could be worked around. I have already reviewed a few solutions, and I will list them here: Flume to Flume to S3: I could set up two logservers as Flume hosts which would store log messages either locally or in S3, and configure all the servers with Flume to send all messages to both servers, using the end-to-end reliability options. That way the loss of a single server shouldn't cause lost messages and all messages would arrive in two availability zones in realtime. However, there would need to be some way to join the logs of the two servers, deduplicating all the messages delivered to both. This could be done by adding a unique id on the sending side to each message and then write some manual deduplication runs on the logfiles. I haven't found an easy solution to the duplication problem. Logstash to Logstash to ElasticSearch: I could install Logstash on the servers and have them deliver to a central server via AMQP, with the durability options turned on. However, for this to work I would need to use some of the clustering capable AMQP implementations, or fan out the deliver just as in the Flume case. AMQP seems to be a yet another moving part with several implementations and no real guidance on what works best this sort of setup. And I'm not entirely convinced that I could get actual end-to-end durability from logstash to elasticsearch, assuming crashing servers in between. The fan-out solutions run in to the deduplication problem again. The best solution that would seem to handle all the cases, would be Beetle, which seems to provide high availability and deduplication via a redis store. However, I haven't seen any guidance on how to set this up with Logstash and Redis is one more moving part again for something that shouldn't be terribly difficult. Logstash to ElasticSearch: I could run Logstash on all the servers, have all the filtering and processing rules in the servers themselves and just have them log directly to a removet ElasticSearch server. I think this should bring me reliable logging and I can use the ElasticSearch clustering features to share the database transparently. However, I am not sure if the setup actually survives Logstash restarts and intermittent network problems without duplicating messages in a failover case or similar. But this approach sounds pretty promising. rsync: I could just rsync all the relevant log files to two different servers. The reliability aspect should be perfect here, as the files should be identical to the source files after a sync is done. However, doing an rsync several times per second doesn't sound fun. Also, I need the logs to be untamperable after they have been sent, so the rsyncs would need to be in append-only mode. And log rotations mess things up unless I'm careful. rsyslog with RELP: I could set up rsyslog to send messages to two remote hosts via RELP and have a local queue to store the messages. There is the deduplication problem again, and RELP itself might also duplicate some messages. However, this would only handle the things that log via syslog. None of these solutions seem terribly good, and they have many unknowns still, so I am asking for more information here from people who have set up centralized reliable logging as to what are the best tools to achieve that goal.

    Read the article

  • SQLRelay MySQL compatibility layer in php-cgi.

    - by sybreon
    I am investigating the use of sqlrelay as a middle-layer between an application that uses MySQL with a PostgreSQL backend. I assume that this is something that it can do to ease backend migration. But for the moment, I am just experimenting with a MySQL application accessing a MySQL backend through the sqlrelay layer. app => sqlrelay lib => mysql client lib => tcp => mysql server I followed the instructions for the MySQL drop-in replacement and it works. I can connect to the backend MySQL server using both sqlrsh and mysql client application. It will work for most MySQL applications by using LD_PRELOAD with the compatibility layer library. The instructions recommend re-compiling php to support it. I would prefer not doing something so drastic. They also recommend setting the LD_PRELOAD for apachectl as a method for the apache/php stack. However, this does not work with lighttpd/php-cgi. I have wrapped php-cgi with a shell script that sets LD_PRELOAD before running the cgi script. LD_PRELOAD=/usr/lib/libmysql50sqlrelay-0.39.4.so.1 /usr/bin/php5-cgi $@ I can see LD_PRELOAD correctly set in phpinfo() but the cgi scripts all fail and are unable to connect to the database. According to the mysql client, the compatibility library should report itself as a 5.0.0 client but the phpinfo module reports itself as the actual 5.0.51a client library used. This means that the compatibility library was not used. Is there someone who has had some success doing something similar?

    Read the article

  • Apache2/mod_fcgid/PHP Process Limits Not Respected

    - by Daniel
    I've recently moved to Apache2 / mod_fcgid / PHP from nginx / php_fpm. This is the second server on which I've made this migration, but it's used much less frequently than the first, which is working like a charm. The problem is in the PHP processes that it's spawning. In looking at the mod_fcgid documentation, it appears that the default for killing idle processes is 300 seconds; I've changed that to 20. At this point, I'd be fine if 300 would work - but it's not happening. It's been running for nearly a day now, and server-status shows 12 active processes: Process name: php5 Pid Active Idle Accesses State 19243 84879 14420 11 Ready Process name: php5 Pid Active Idle Accesses State 20954 82143 149 22 Ready 20947 82149 149 22 Ready 20953 82143 149 13 Ready Process name: php5 Pid Active Idle Accesses State 20589 82765 23644 72 Ready Process name: php5 Pid Active Idle Accesses State 17663 86103 2034 117 Ready Process name: php5 Pid Active Idle Accesses State 19862 83961 1976 91 Ready Process name: php5 Pid Active Idle Accesses State 18495 85825 5164 18 Ready Process name: php5 Pid Active Idle Accesses State 25463 75109 23948 24 Ready Process name: php5 Pid Active Idle Accesses State 2466 60019 60016 2 Ready Process name: php5 Pid Active Idle Accesses State 20729 82541 12592 23 Ready Process name: php5 Pid Active Idle Accesses State 22135 80616 46361 6 Ready PHP applications are not being served at this point - Apache is returning a 503. However, it is still serving the server-status module, and mod_mono/Mono 2.10 applications are still being served. The problem is with the PHP. /etc/apache2/mods-available/fcgid.conf... <IfModule mod_fcgid.c> AddHandler fcgid-script .fcgi FcgidConnectTimeout 10 FcgidMaxRequestsPerProcess 500 FcgidIdleTimeout 20 FcgidFixPathinfo 1 FcgidMaxProcesses 10 </IfModule> (heh - Max Processes isn't being respected either...) Of course, fcgid.conf is smylinked in mods-enabled.

    Read the article

  • Allow certain users to access a specific directory?

    - by animuson
    I'm trying to figure out how to allow certain users who are also me to access a directory of files that I want to use for all of my users. I'm using cPanel and I used WHM to create three separate accounts. The files I want to use are on account1 in the directory /home/account1/public_html/source/engines and I want the directory /home/account2/public_html/source/engines to use the same exact files without having to upload them to both places every time I change them, so I created a simple symbolic link and added account2 to the group account1 (while still keeping its own group as the primary). It still gives me a Permission Denied error though. Is there any way I can grant account2 and other accounts that I create for myself access to those files? I don't want them to be global to all users because I don't want my hosted users to be able to access them, only my users. groups account1 returns account1 : account1 groups account2 returns account2 : account2 account1 /home/account1/public_html/source/engines and all its files belongs to account1:account1 Any other information you might need just ask.

    Read the article

  • Running multiple sites on a LAMP with secure isolation

    - by David C.
    Hi everybody, I have been administering a few LAMP servers with 2-5 sites on each of them. These are basically owned by the same user/client so there are no security issues except from attacks through vulnerable deamons or scripts. I am builing my own server and would like to start hosting multiple sites. My first concern is... ISOLATION. How can I avoid that a c99 script could deface all the virtual hosts? Also, should I prevent that c99 to be able to write/read the other sites' directories? (It is easy to "cat" a config.php from another site and then get into the mysql database) My server is a VPS with 512M burstable to 1G. Among the free hosting managers, is there any small one which works for my VPS? (which maybe is compatible with the security approach I would like to have) Currently I am not planning to host over 10 sites but I would not accept that a client/hacker could navigate into unwanted directories or, worse, run malicious scripts. FTP management would be fine. I don't want to complicate things with SSH isolation. What is the best practice in this case? Basically, what do hosting companies do to sleep well? :) Thanks very much! David

    Read the article

  • MediaWiki migrated from Tiger to Snow Leopard throwing an exceptions

    - by Matt S
    I had an old laptop running Mac OS X 10.4 with macports for web development: Apache 2, PHP 5.3.2, Mysql 5, etc. I got a new laptop running Mac OS X 10.6 and installed macports. I installed the same web development apps: Apache 2, PHP 5.3.2, Mysql 5, etc. All versions the same as my old laptop. A Mediawiki site (version 1.15) was copied over from my old system (via the Migration Assistant). Having a fresh Mysql setup, I dumped my old database and imported it on the new system. When I try to browse to mediawiki's "Special" pages, I get the following exception thrown: Invalid language code requested Backtrace: #0 /languages/Language.php(2539): Language::loadLocalisation(NULL) #1 /includes/MessageCache.php(846): Language::getFallbackFor(NULL) #2 /includes/MessageCache.php(821): MessageCache->processMessagesArray(Array, NULL) #3 /includes/GlobalFunctions.php(2901): MessageCache->loadMessagesFile('/Users/matt/Sit...', false) #4 /extensions/OpenID/OpenID.setup.php(181): wfLoadExtensionMessages('OpenID') #5 [internal function]: OpenIDLocalizedPageName(Array, 'en') #6 /includes/Hooks.php(117): call_user_func_array('OpenIDLocalized...', Array) #7 /languages/Language.php(1851): wfRunHooks('LanguageGetSpec...', Array) #8 /includes/SpecialPage.php(240): Language->getSpecialPageAliases() #9 /includes/SpecialPage.php(262): SpecialPage::initAliasList() #10 /includes/SpecialPage.php(406): SpecialPage::resolveAlias('UserLogin') #11 /includes/SpecialPage.php(507): SpecialPage::getPageByAlias('UserLogin') #12 /includes/Wiki.php(229): SpecialPage::executePath(Object(Title)) #13 /includes/Wiki.php(59): MediaWiki->initializeSpecialCases(Object(Title), Object(OutputPage), Object(WebRequest)) #14 /index.php(116): MediaWiki->initialize(Object(Title), NULL, Object(OutputPage), Object(User), Object(WebRequest)) #15 {main} I tried to step through Mediawiki's code, but it's a mess. There are global variables everywhere. If I change the code slightly to get around the exception, the page comes up blank and there are no errors (implying there are multiple problems). Anyone else get Mediawiki 1.15 working on OS X 10.6 with macports? Anything in the migration from Tiger that could cause a problem? Any clues where to look for answers?

    Read the article

  • how to setup wordpress to allow multiple domains for same blog

    - by Joelio
    Hi, I want to setup a single wordpress install to allow users to visit using 2 domains: For example: foo.com bar.foo.com I can do this for the most part, but whatever domain is configured in the wp-admin screen, it will redirect to that whenever any of the links are clicked. For example, if I set it up to foo.com and I come in using bar.foo.com and click an article link, it takes me to foo.com and the article link. I want the user to stay on the domain they came in. thanks Joel

    Read the article

  • How to access a simple file or folder from Tomcat webapps folder

    - by Ankur
    I want to be able to access a folder from my tomcat webapps folder so that I can give someone a URL like: http://localhost:8080/myFolder/myFile.f And in a web browser if they point to this they should start downloading the file. But in reality I get a 404 error when I try to point to this location. How can I solve this or get around it.

    Read the article

  • Simple wordpress Registration

    - by andrew
    Does anyone know of a wordpress plugin which simplifies the registration process by allowing users to sign up on the spot without having to be sent an email? It would be good if you could also pass a redirect_to parameter in the url like you can for the login.

    Read the article

  • Simple jail for user with open-ssh

    - by Vikram
    Can I confine my users to their /home/%u directory using simply open-ssh configuration? I did the following from what I found on the Internet Stopped the server To the sshd_config file appended the following Match group sftpusers ChrootDirectory /home/%u X11Forwarding no AllowTcpForwarding no started the server FYI I have the users added to sftpusers group My users can still access entire file structure on my system Ubuntu Server 12.04 LTS with open-ssh installed

    Read the article

  • Replicated MongoDB server slower than simple shards

    - by displayName
    I tried to compare the performance of a sharded configuration against a sharded and replicated configuration. The sharded configuration consists of 8 shards each running on three different machines thereby constituting a total of 24 shards. All 8 of these shards run in the same partition on each machine. The sharded and replicated version is 8 shards again just like plain sharding, and all 8 mongods run on the same partition in each machine. But apart from this, each of these three machine now run additional 16 threads on another partition which serve as the secondary for the 8 mongods running on other machines. This is the way I prepared a sharded and replicated configuration with data chunks having replication factor of 3. Important point to note is that once the data has been loaded, it is not modified. So after primary and secondaries have synchronized then it doesn't matter which one i read from. To run the queries, I use an entirely different machine (let's call it config) which runs mongos and this machine's only purpose is to receive queries and run them on the cluster. Contrary to my expectations, plain sharding of 8 threads on each machine (total = 3 * 8 = 24) is performing better for queries than the sharded + replicated configuration. I have a script written to perform the query. So in order to time the scripts, I use time ./testScript and see the result. I tried changing the reading preference for replicated cluster by logging to mongo of config and run db.getMongo().setReadPref('secondary') and then exit the shell and run the queries like time ./testScript. The questions are: Where am i going wrong in the replication? Why is it slower than its plain sharding version? Does the db.getMongo().ReadPref('secondary') persist when i leave the shell and try to perform the query? All the four machines are running Linux and i have already increased the ulimit -n to 2048 from initial value of 1024 to allow more connections. The collections are properly distributed and all the mongods have equal number of chunks. Goes without saying that indices in both configurations are the same.

    Read the article

< Previous Page | 556 557 558 559 560 561 562 563 564 565 566 567  | Next Page >