Search Results

Search found 5377 results on 216 pages for 'robert low'.

Page 194/216 | < Previous Page | 190 191 192 193 194 195 196 197 198 199 200 201  | Next Page >

  • Puppet master fails to run under nginx+passenger configuration as rack app, works when run as system service

    - by Anadi Misra
    I get the error [anadi@bangda ~]# tail -f /var/log/nginx/error.log [ pid=19741 thr=23597654217140 file=utils.rb:176 time=2012-09-17 12:52:43.307 ]: *** Exception LoadError in PhusionPassenger::Rack::ApplicationSpawner (no such file to load -- puppet/application/master) (process 19741, thread #<Thread:0x2aec83982368>): from /usr/local/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:31:in `gem_original_require' from /usr/local/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:31:in `require' from config.ru:13 from /usr/local/lib/ruby/gems/1.8/gems/rack-1.4.1/lib/rack/builder.rb:51:in `instance_eval' from /usr/local/lib/ruby/gems/1.8/gems/rack-1.4.1/lib/rack/builder.rb:51:in `initialize' from config.ru:1:in `new' from config.ru:1 when I start nginx server with passenger module configured, puppet master configured to run through rack. here is the config.ru [anadi@bangda ~]# cat /etc/puppet/rack/config.ru # a config.ru, for use with every rack-compatible webserver. # SSL needs to be handled outside this, though. # if puppet is not in your RUBYLIB: #$:.unshift('/usr/share/puppet/lib') $0 = "master" # if you want debugging: # ARGV << "--debug" ARGV << "--rack" require 'puppet/application/master' # we're usually running inside a Rack::Builder.new {} block, # therefore we need to call run *here*. run Puppet::Application[:master].run and the nginx configuration for puppet master is as follows [anadi@bangda ~]# cat /etc/nginx/conf.d/puppet-master.conf server { listen 8140 ssl; server_name bangda.mycompany.com; passenger_enabled on; passenger_set_cgi_param HTTP_X_CLIENT_DN $ssl_client_s_dn; passenger_set_cgi_param HTTP_X_CLIENT_VERIFY $ssl_client_verify; access_log /var/log/nginx/puppet/master.access.log; error_log /var/log/nginx/puppet/master.error.log; root /etc/puppet/rack/public; ssl_certificate /var/lib/puppet/ssl/certs/bangda.mycompany.com.pem; ssl_certificate_key /var/lib/puppet/ssl/private_keys/bangda.mycompany.com.pem; ssl_crl /var/lib/puppet/ssl/ca/ca_crl.pem; ssl_client_certificate /var/lib/puppet/ssl/certs/ca.pem; ssl_ciphers SSLv2:-LOW:-EXPORT:RC4+RSA; ssl_prefer_server_ciphers on; ssl_verify_client optional; ssl_verify_depth 1; ssl_session_cache shared:SSL:128m; ssl_session_timeout 5m; } however when I run puppet through the ususal puppetmasterd daemon it works perfect with no errors. I can see somehow the nginx+passenger+rack setup fails to initialize while the same works when running the natvie puppetmaster daemon. Any configuration that I am missing?

    Read the article

  • Debugging IO limitation

    - by Martin F
    I have a Fedora box with some severe IO limitations which I have no idea how to debug. The server has a Areca Technology Corp. ARC-1130 12-Port PCI-X to SATA RAID Controller with 12 7200 RPM 1.5 TB disks and a Marvell Technology Group Ltd. 88E8050 PCI-E ASF Gigabit Ethernet Controller. uname -a output: 2.6.32.11-99.fc12.x86_64 #1 SMP Mon Apr 5 19:59:38 UTC 2010 x86_64 x86_64 x86_64 GNU/Linux The server is a file server running Nginx with the stub status module enabled, so I can see the current amount of connections. The problem present itself when I have a high number of simultaneous connections in a writing state. Usually around 350, at this very moment it's at 590 and the server is almost unusable and stuck at 230mbit/s. If I run stop and hit 1 to see CPU core usages I have all 4 cores with around 99% io wait, if I run iotop the nginx workers are the only processes producing any read load, currently at around 25MB/s. I have each of the workers bound to their own core. Initially I figured it was just the disks being bugged. But I've run fscheck and smartmontools checks and found no errors. I also ran an iozone test which you can see the result of here: http://www.pastie.org/951667.txt?key=fimcvljulnuqy2dcdxa Additionally, when the amount of connections are low I have no problem getting a good speed. If I wget over the local network it easily hits 60MB/sec. Right now I just tried putting a file in /dev/shm, then I symlinked a file from the public dir to it and used wget over the local network and only got 50KB/s. Also, if I try to cp /dev/shm/test /root/test it quickly copies around 740MB and then slows down HEAVILY. Again with iotop reporting 99% iowait. I'm not really sure how to go about figuring out what the problems are. It could be a natural disk limitation but then the file from /dev/shm ought to transfer so it seems there's a network limit, but that's fine when there's not many connections. Perhaps it's a TCP stack problem but I really have no idea how to check that. Any suggestions on how to proceed with debugging would be very welcome. If additional information is required then let me know and I'll try to get it. Thanks.

    Read the article

  • Making application behind reverse proxy aware of https

    - by akaIDIOT
    https in tomcat being the hassel it is, I've been trying to get an Axis2 webapp to work behind a reverse proxy for ages now, can't seem to get it to work. The proxying itself works like a charm, but the app fails to generate 'links' (or ports as it concerns SOAP) using https. It would seem I need some way to let Axis2 know it is being accessed through https, even though the actual transport to it is done over http (proxied from localhost). The nginx config that proxies https to localhost:8080: server { listen 443; server_name localhost; ssl on; ssl_certificate /path/to/.pem ssl_certificate_key /path/to/.key; ssl_session_timeout 5m; ssl_protocols SSLv3 TLSv1; ssl_ciphers ALL:!ADH:!EXPORT56:RC4+RSA:+HIGH:+MEDIUM:+LOW:+SSLv3:+EXP; ssl_prefer_server_ciphers on; location / { # force some http-headers (avoid confusing tomcat) proxy_set_header X-Real-IP $remote_addr; proxy_set_header Host $http_host; proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for; proxy_set_header X-Forwarded-Proto https; # pass requests to local tomcat server listening on default port 8080 proxy_pass http://localhost:8080; } } The proxy itself works fine, the info pages of the webapp work. The problem lies in the ports generated in the .wsdl: <wsdl:service name="WebService"> <wsdl:port name="WebServiceHttpSoap11Endpoint" binding="ns:WebServiceSoap11Binding"> <soap:address location="http://10.10.3.96/axis2/services/WebService.WebServiceHttpSoap11Endpoint/"/> </wsdl:port> <wsdl:port name="WebServiceHttpSoap12Endpoint" binding="ns:WebServiceSoap12Binding"> <soap12:address location="http://10.10.3.96/axis2/services/WebService.WebServiceHttpSoap12Endpoint/"/> </wsdl:port> <wsdl:port name="WebServiceHttpEndpoint" binding="ns:WebServiceHttpBinding"> <http:address location="http://10.10.3.96/axis2/services/WebService.WebServiceHttpEndpoint/"/> </wsdl:port> </wsdl:service> The Host header does its job; it shows 10.10.3.96 in stead of localhost, but as the snippet shows: it says http:// in front of it in stead of https://. My client app can't deal with this... Adding proxyPort and proxyName to the tomcat6 server.xml in the default <Connector> doesn't help; I'm at a loss on how to get this to work properly.

    Read the article

  • Bash-Scripting - Munin Plugin don't work

    - by FTV Admin
    i have written a munin-plugin to count the http-statuscodes of lighttpd. The script: #!/bin/bash ###################################### # Munin-Script: Lighttpd-Statuscodes # ###################################### ##Config # path to lighttpd access.log LIGHTTPD_ACCESS_LOG_PATH="/var/log/lighttpd/access.log" # rows to parse in logfile (higher value incrase time to run plugin. if value to low you may get bad counting) LOG_ROWS="200000" # #munin case $1 in autoconf) # check config AVAILABLE=`ls $LIGHTTPD_ACCESS_LOG_PATH` if [ "$AVAILABLE" = "$LIGHTTPD_ACCESS_LOG_PATH" ]; then echo "yes" else echo "No: "$AVAILABLE echo "Please check your config!" fi exit 0;; config) # graph config cat <<'EOM' graph_title Lighhtpd Statuscodes graph_vlabel http-statuscodes / min graph_category lighttpd 1xx.label 1xx 2xx.label 2xx 3xx.label 3xx 4xx.label 4xx 5xx.label 5xx EOM exit 0;; esac ## calculate AVAILABLE=`ls $LIGHTTPD_ACCESS_LOG_PATH` if [ "$AVAILABLE" = "$LIGHTTPD_ACCESS_LOG_PATH" ]; then TIME_NOW=`date` CODE_1xx="0" CODE_2xx="0" CODE_3xx="0" CODE_4xx="0" CODE_5xx="0" for i in 1 2 3 4 5; do TIME5=`date +%d/%b/%Y:%k:%M --date "$TIME_NOW -"$i"min"` CODE_1xx=$(( $CODE_1xx + `tail -n $LOG_ROWS $LIGHTTPD_ACCESS_LOG_PATH | grep "$TIME5" | grep 'HTTP/1.1" 1' | grep -c " "` )) CODE_2xx=$(( $CODE_2xx + `tail -n $LOG_ROWS $LIGHTTPD_ACCESS_LOG_PATH | grep "$TIME5" | grep 'HTTP/1.1" 2' | grep -c " "` )) CODE_3xx=$(( $CODE_3xx + `tail -n $LOG_ROWS $LIGHTTPD_ACCESS_LOG_PATH | grep "$TIME5" | grep 'HTTP/1.1" 3' | grep -c " "` )) CODE_4xx=$(( $CODE_4xx + `tail -n $LOG_ROWS $LIGHTTPD_ACCESS_LOG_PATH | grep "$TIME5" | grep 'HTTP/1.1" 4' | grep -c " "` )) CODE_5xx=$(( $CODE_5xx + `tail -n $LOG_ROWS $LIGHTTPD_ACCESS_LOG_PATH | grep "$TIME5" | grep 'HTTP/1.1" 5' | grep -c " "` )) done CODE_1xx=$(( $CODE_1xx / 5 )) CODE_2xx=$(( $CODE_2xx / 5 )) CODE_3xx=$(( $CODE_3xx / 5 )) CODE_4xx=$(( $CODE_4xx / 5 )) CODE_5xx=$(( $CODE_5xx / 5 )) echo "1xx.value "$CODE_1xx echo "2xx.value "$CODE_2xx echo "3xx.value "$CODE_3xx echo "4xx.value "$CODE_4xx echo "5xx.value "$CODE_5xx else echo "1xx.value U" echo "2xx.value U" echo "3xx.value U" echo "4xx.value U" echo "5xx.value U" fi If i run the script on local machine it runs perfectly: root@server1 /etc/munin/plugins # ll lrwxrwxrwx 1 root root 45 2011-12-19 15:23 lighttpd_statuscodes -> /usr/share/munin/plugins/lighttpd_statuscodes* root@server1 /etc/munin/plugins # ./lighttpd_statuscodes autoconf yes root@server1 /etc/munin/plugins # ./lighttpd_statuscodes config graph_title Lighhtpd Statuscodes graph_vlabel http-statuscodes / min graph_category lighttpd 1xx.label 1xx 2xx.label 2xx 3xx.label 3xx 4xx.label 4xx 5xx.label 5xx root@server1 /etc/munin/plugins #./lighttpd_statuscodes 1xx.value 0 2xx.value 5834 3xx.value 1892 4xx.value 0 5xx.value 0 But Munin shows no graph: http://s1.directupload.net/images/111219/3psgq3vb.jpg I have tested the Plugin from munin-server via telnet: root@munin-server /etc/munin/plugins/ # telnet 123.123.123.123 4949 Trying 123.123.123.123... Connected to 123.123.123.123. Escape character is '^]'. # munin node at server1.cluster1 fetch lighttpd_statuscodes 1xx.value U 2xx.value U 3xx.value U 4xx.value U 5xx.value U . Connection closed by foreign host. You can see in the script that value = U only printed, when the script can't check the lighttpd's access.log. But why can't script do it, when running via munin, and when running on local machine all is ok? Is there a bug in my bash-script? I have no Idea. Thanks for helping!

    Read the article

  • TeamSpeak 3 Disconnects

    - by ArchUser
    I've recently had a few random TS3 mass disconnects and I'm am curious to know where I may find any applications that can help me determine the cause of any types of TS3 server disconnections as we plan on having many more users in the future. I run an almost empty VPS (OpenVZ) server with an ArchLinux template on it. I have 1.5/2GB of RAM, 2GHz of CPU and plenty of hard drive space, to run for the most part, just my TS3 and a low traffic apache web server. This is what I am investigating. 2011-02-04 06:07:05.130343|INFO |VirtualServer | 1| client disconnected 'Valamoor'(id:224) reason 'reasonmsg=connection lost' 2011-02-04 06:07:05.131338|INFO |VirtualServer | 1| client disconnected 'Kevrow'(id:19? reason 'reasonmsg=connection lost' 2011-02-04 06:07:05.191849|INFO |VirtualServer | 1| client disconnected 'scuba'(id:200) reason 'reasonmsg=connection lost' 2011-02-04 06:07:05.192633|INFO |VirtualServer | 1| client disconnected '[Ash] Setna'(id:75) reason 'reasonmsg=connection lost' 2011-02-04 06:07:05.193350|INFO |VirtualServer | 1| client disconnected 'Akiris'(id:254) reason 'reasonmsg=connection lost' 2011-02-04 06:07:05.194047|INFO |VirtualServer | 1| client disconnected 'Marcus'(id:25? reason 'reasonmsg=connection lost' 2011-02-04 06:07:05.194726|INFO |VirtualServer | 1| client disconnected 'Guthry'(id:275) reason 'reasonmsg=connection lost' 2011-02-04 07:18:50.327071|INFO |VirtualServer | 1| client disconnected 'Valamoor'(id:224) reason 'reasonmsg=connection lost' 2011-02-04 07:18:51.339018|INFO |VirtualServer | 1| client disconnected 'Marcus'(id:25? reason 'reasonmsg=connection lost' 2011-02-04 07:18:51.339870|INFO |VirtualServer | 1| client disconnected '[Ash] Setna'(id:75) reason 'reasonmsg=connection lost' 2011-02-04 07:18:51.340515|INFO |VirtualServer | 1| client disconnected 'Guthry'(id:275) reason 'reasonmsg=connection lost' 2011-02-05 04:55:20.797353|INFO |VirtualServer | 1| client disconnected 'JohnyRingo'(id:240) reason 'reasonmsg=connection lost' 2011-02-05 04:55:20.798517|INFO |VirtualServer | 1| client disconnected 'Maloo roots'(id:196) reason 'reasonmsg=connection lost' 2011-02-05 04:55:20.799314|INFO |VirtualServer | 1| client disconnected 'Cpt dravyn'(id:234) reason 'reasonmsg=connection lost' 2011-02-05 04:55:20.839254|INFO |VirtualServer | 1| client disconnected 'scuba'(id:200) reason 'reasonmsg=connection lost' etc... I need to determine if it is my hosting provider or my server, and what tools I can use to determine the issues. My VPS host has told me this... "I checked out the node that your VPS runs on and there is no abnormal system load, or I/O wait from the drive. I also checked the bandwidth history from the server and there have been no spikes or outages."

    Read the article

  • Looking for a new backup solution to replace dying tape drive

    - by E3 Group
    We're running Windows Server 2003 SBS and another machine with Server 2003 Standard on it. The SBS server is about 7 years old running pretty much 24/7 - a HP server of some description. We have an Ultrium 448 cycling LTO2 400GB tapes daily and incrementally backing up approximately 100gb worth of data (20gb C:\ and system state, 40gb exchange, 40gb database for some crap marketing software) on BackupExec 10D. As of 5 months ago, the backups have been consistently failing with IO errors, bad reads and some write errors. When I say consistent, I mean every time and we haven't had a proper backup for the entire 5 months - So if the server explodes tomorrow, 7 years worth of data will just cease to exist. I've only just recently rejoined the company and am looking at rectifying the more concerning problems, so the first thing I did was try a backup to an USB2.0 external drive. It was excruciatingly slow. In fact it was so slow it took 40 hours and it still wasn't finished. I ended up cancelling it and reconfiguring the selections again to reduce file size. This, however, isn't a permanent solution. I concluded that the IO error was either from a faulty tape drive (which has a tape stuck in there right now and not coming out) or from a dying SCSI controller. Neither of them are good news and both are extremely expensive to fix. I'm operating on an extremely low budget so have been looking at outsourcing the backups. A company in Sydney (where I'm located) offer incremental online backups via a NAS. It costs almost double a new tape drive but offers monthly repayments which will let us get through times when cash flow is minimal. It seems like a sweet deal but it is still a little bit pricey. So I'm looking for a cheaper, yet reliable solution. Maybe some in-house NAS or something offsite? The idea is to avoid using tapes. Are there any recommendations for rectifying my current situation? Or are tapes the only way to go? I'm concerned that the server will die one day in the near future and I must be able to restore it to another server with different hardware.

    Read the article

  • TCP/IP & throughput between FreeNAS (BSD) server & other LAN machines

    - by Tim Dickerson
    I have got a question for someone that knows BSD a bit better than me that are in regards to my LAN setup at home/work here outside Chicago. I can't seem to fully optimize my network's (LAN) thoughput via my FreeNAS (BSD based) file server. It runs with the latest FreeBSD release which is modified to support several protocols for file transfers and more. Every machine that is behind my Smoothwall (Linux based) router is on the usual 192.168.0.x subnet and for most part works just fine. Behind the Smoothwall box, all machines are connected to a GB HP unmanaged switch. I host a large WISP here and have an OC-3 connection here at home/work and have no issues with downloading/uploading from/to the 'net'. My problem is with throughput. When I try and transfer large files...really any for that matter..between any of the machines to/and from the FreeNAS server via FTP, the max throughput I can achieve say between a Win 7 or a Linux box is ~65Mbit/sec. All machines are running Intel Pro 1000 GB NIC's and all cable is CAT6. Each is set to 'auto negotiation' and each shows 1500 MTU Full Duplex @1GB so I know the hardware is okay. I have not adjusted the MTU on any machine as I understand it to be pointless unless certain configurations are used (I assume I am not one of those). My settings for the FreeNAS machine are the following: # FreeNAS /etc/sysctl.conf - pertinent settings shown kern.ipc.maxsockbuf=262144 kern.ipc.nmbclusters=32768 kern.ipc.somaxconn=8192 kern.maxfiles=65536 kern.maxfilesperproc=32768 net.inet.tcp.delayed_ack=0 net.inet.tcp.inflight.enable=0 net.inet.tcp.path_mtu_discovery=0 net.inet.tcp.recvbuf_auto=1 net.inet.tcp.recvbuf_inc=524288 net.inet.tcp.recvbuf_max=16777216 net.inet.tcp.recvspace=65536 net.inet.tcp.rfc1323=1 net.inet.tcp.sendbuf_inc=16384 net.inet.tcp.sendbuf_max=16777216 net.inet.tcp.sendspace=65536 net.inet.udp.recvspace=65536 net.local.stream.recvspace=65536 net.local.stream.sendspace=65536 net.inet.tcp.hostcache.expire=1 From what I can tell, that looks to be a somewhat optimized profile for a typical BSD machine acting as a server for a LAN. I might be wrong and just wanted to find out from someone that knows BSD better than I do if indeed that is ok or if something is out of tune or what. Are there other ways I would find better for P2P file transfers? I honestly do not know what I SHOULD be looking for with respect to throughput between the NAS box and another client when xferring files via FTP, but I am told that what I get on average (40-70MB/sec) is too low for what it could be. I have thought about adding another NIC in the FreeNAS box as well as the Win7 machine and use a X-over cable via a static route, but wanted to check with someone first to see if that might be worth it or not. I don't know if doing that would bypass the HP GB switch and allow for a machine to machine xfer anyways. The FTP client I use is: Filezilla and have tried both active and passive modes with no real gain over each other. The NAS box runs ProFTPD.

    Read the article

  • Passenger 2.2.4, nginx 0.7.61 and SSL

    - by boompa
    Has anyone had any luck configuring Passenger and nginx with SSL? I've spent hours trying to get this configuration working as I'd like, using what few resources there are out there on the net, and I can't get any of the supposedly forwarded headers to show up in the Rails controller. For example, with a conf file of the following (and multiple variations thereof): server { listen 3000; server_name .example.com; root /Users/website/public; passenger_enabled on; rails_env development; } server { listen 3443; root /Users/website/public; rails_env development; passenger_enabled on; ssl on; #ssl_verify_client on; ssl_certificate /Users/website/ssl/server.crt; ssl_certificate_key /Users/website/ssl/server.key; #ssl_client_certificate /Users/website/ssl/CA.crt; ssl_session_timeout 5m; ssl_protocols SSLv3 TLSv1; ssl_ciphers ALL:!ADH:RC4+RSA:+HIGH:+MEDIUM:-LOW:-SSLv2:-EXP; proxy_set_header Host $http_host; proxy_set_header X-Real-IP $remote_addr; proxy_set_header X_FORWARDED_PROTO https; proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for; #proxy_set_header X-SSL-Subject $ssl_client_s_dn; #proxy_set_header X-SSL-Issuer $ssl_client_i_dn; proxy_redirect off; proxy_max_temp_file_size 0; } and Rails code in the controller like this: request.headers.each { |k, v| RAILS_DEFAULT_LOGGER.error "Header #{k} Val #{v}" } other headers appear, but not those set in nginx, e.g.: Header rack.multithread Val false Header REQUEST_URI Val /login/new Header REMOTE_PORT Val 64021 Header rack.multiprocess Val true Header PASSENGER_USE_GLOBAL_QUEUE Val false Header PASSENGER_APP_TYPE Val rails Header SCGI Val 1 Header SERVER_PORT Val 3443 Header HTTP_ACCEPT_CHARSET Val ISO-8859-1,utf-8;q=0.7,*;q=0.7 Header rack.request.query_hash Val Header DOCUMENT_ROOT Val /Users/website/public I've even gone so far as to modify Passenger's abstract_request_handler's main_loop method, i.e., headers, input = parse_request(client) if headers if headers[REQUEST_METHOD] == PING process_ping(headers, input, client) else headers.each { |h,v| log.unknown "abstract_request_handler: #{h} = #{v}" } process_request(headers, input, client) end end only to find that the supposedly added headers do not exist there either: abstract_request_handler: HTTP_KEEP_ALIVE = 300 abstract_request_handler: HTTP_USER_AGENT = Mozilla/5.0 (Macintosh; U; Intel Mac OS X 10.5; en-US; rv:1.9.1) Gecko/20090624 Firefox/3.5 abstract_request_handler: PASSENGER_SPAWN_METHOD = smart-lv2 abstract_request_handler: CONTENT_LENGTH = 0 abstract_request_handler: HTTP_IF_NONE_MATCH = "b6e8b9afbc1110ee3bf0c87e119252ad" abstract_request_handler: HTTP_ACCEPT_LANGUAGE = en-us,en;q=0.5 abstract_request_handler: SERVER_PROTOCOL = HTTP/1.1 abstract_request_handler: HTTPS = on abstract_request_handler: REMOTE_ADDR = 127.0.0.1 abstract_request_handler: SERVER_SOFTWARE = nginx/0.7.61 abstract_request_handler: SERVER_ADDR = 127.0.0.1 abstract_request_handler: SCRIPT_NAME = abstract_request_handler: PASSENGER_ENVIRONMENT = development abstract_request_handler: REMOTE_PORT = 64021 abstract_request_handler: REQUEST_URI = /login/new abstract_request_handler: HTTP_ACCEPT_CHARSET = ISO-8859-1,utf-8;q=0.7,*;q=0.7 abstract_request_handler: SERVER_PORT = 3443 abstract_request_handler: SCGI = 1 abstract_request_handler: PASSENGER_APP_TYPE = rails abstract_request_handler: PASSENGER_USE_GLOBAL_QUEUE = false I'm tired of banging my head against the wall, so I'd truly appreciate any help I can get!

    Read the article

  • SMTP host name vs. domain in "From:" address vis-a-vis Email Deliverability

    - by Jared Duncan
    I'm trying to implement (or make sure that I'm correctly following) email sending best practices to improve deliverability, but the role of the smtp server's host name vs the domain name of the From: email address seems to be unclear, even after reading dozens of people's articles/input. Specifically, I understand that to satisfy the reverse DNS check, there must be a PTR record for the IP address of the sending machine that yields a domain name that matches the host name of the sending machine / SMTP server. Some say it needs to match the one given by the "hostname" command, most say it's the one provided with the HELO / EHLO statement, and this guy even says they MUST be the same (according to / enforced by what, I don't know; that's only a minor point of confusion, anyhow). First, what I can't find anywhere is whether or not the domain name of the From: email address needs to match the domain name of the SMTP server. So in my case, I have a VPS with linode. It primarily hosts a particular domain of mine, example.com, but I also sometimes do work on other projects: foo.com and bar.com. So what I'm wondering is if I can just leave the default linode PTR record (which resolves to abc.def.linode.com), make sure that abc.def.linode.com is what my mail server (qmail) is configured to say at HELO, and then proceed to use it to send out emails for example.com, foo.com, et al. If so, then I am confused by the advice given here, specifically (in a listing of bad case scenarios): No SPF record for the domain being used in the HELO command Why would THAT domain need an SPF record? And if it does, which domain should it provide whitelisting for: the HELO domain, or the domain of the From: email address (envelope sender)? Also, which domain would need to accept mail sent to [email protected]? If the domains must be the same, that would seem rather limiting to me, because then for every domain you wanted to send email from, you'd have to get another IP address for it. It would also compromise or ruin one's ability to do non-email sending things (e.g. wget) relatively anonymously. However, the upside--if this is the case--is that it would make for a far less confusing setup. I'm currently using the linode.com SMTP+PTR domain and example.com From: address combination without much of any deliverability issue, but my volume is very low and I'd like to know if someone out there has experience with larger volumes and has specifically tested the difference and/or has inside knowledge and/or has an authoritative answer (and source) for this particular question. I'm happy to clarify anything, let me know. Thanks in advance.

    Read the article

  • Why is my new Phenom II 965 BE not significantly faster than my old Athlon 64 X2 4600+?

    - by Software Monkey
    I recently rebuilt my 5 year old computer. I upgraded all core components, in particular from an Athlon 64 X2 4600+ at 2.4 GHz with DDR2 800 to a Phenom II 965 BE (quad core) at 3.6 GHz with DDR3 1333 (actually 1600, but testing consistently detected memory errors at 1600). The motherboard is also much newer and better. The HDD's (x3), DVD writer and card reader are the same. The BIOS memory config is auto-everything except the base timing which I overrode to 1T instead of 2T. The BIOS CPU multiplier is slightly over-clocked to 3.6 GHz from the stock 3.4 GHz. I noticed compiling Java is slower than I expected. As it happens I have some (single-threaded) Java pattern-matching code which is CPU and memory bound and for which I have performance numbers recorded on a number of hardware platforms, including my old system. So I did a test run on the new equipment and was stunned to find that the numbers are only slightly better than my old system, about 25%. The data set it is operating on is a 148,975 character array, which should easily fit in caches, but in any event the new CPU has larger caches all around. The system was, of course, otherwise idle for the test and the test run is a timed 10 seconds to eliminate scheduling anomalies. A long while ago, when I upgraded only memory from DD2 667 to DDR2 800 there was no change in performance of this test, which subjectively supports that the test cycle does not need to (significantly) access main memory, but yes it is creating and garbage collecting a large number of objects in the process of this test (low millions of matches are found for the pattern set). I am about 99.999% certain the code hasn't changed since I last ran it on 2009-03-17 - but I can't easily retest the old hardware, because it is currently in pieces on my work-bench waiting to be built into a new computer for my kids. Note that Windows (XP) reports a CPU speed of 795 MHz unless I have some thing running. With stuff running it seems to jump all over the place each time I use ALT-Pause to display the system properties, everywhere from 795 MHz to 3.4 Ghz. So why might my shiny new hardware under-performing so badly? EDIT: The old memory was Mushkin DDR2 800 with timings set for auto which should have been 5-5-5-12. The new memory is Corsair DDR3 1600, running at 1333 with timings also auto which are 9-9-9-21. In both cases they are a paired set of dual channel DIMMs. I was waiting to ensure my system was stable before tweaking with memory timings.

    Read the article

  • Buying a new printer instead of replacing ink?

    - by Kelsey
    With prices of basic printers being around $40 - $50 and a ink cartridge being around $20 - $30 each for black AND color. It costs me more to replace the printer's ink than to just buy a brand new printer. This just seems like a total waste of materials though (I have 4 printers sitting in my basement with no ink). I know the ink cartridges are smaller (not as full) in a new printer but I go through it in about 1 to 1.5 years only and by then my $40 gets me a better printer to boot. Also with certain printers the heads are not part of the ink (Epson use to do this and still might) so I get new heads as well. Is this a bad practice? Are retailers making this a reality when they are selling working hardware cheaper than replacement parts? Is there something more I should be considering? Edit: Some background, long ago I bought an Epson printer which I used to print docs etc vary rarely. The ink started running low so I bought to new carts for around $60 if I recall. The printer then stopped working so I replaced the carts with the new ones but the head was dead on the black which was not worth repairing. I bought a new HP printer for $49. This lasted around 1.5yrs and then the ink ran out, I went to buy new carts and the guy at the store got me to buy a new printer (that was smaller, faster, higher dpi, etc) and it was cheaper than replacing the ink. When the ink ran out on that one I bought a new printer again, etc. The printer gets used maybe once a week at most and I never print photos or anything. It normally is jsut stored away unplugged accumulating dust. People say to buy a laser printer but they are much larger, do not print color, (in the price range I am looking at) and might have the exact same issues. The problem I see is the manufacturer is making my behaviour possible by selling new printers at a loss hoping that they will cash in on the ink later. How can they produce a printer for so cheap which HAS ink in it, and the refills cost more than the unit? It can't.

    Read the article

  • Revolutionary brand powder packing machine price from affecting marketplace boom and put on uniform in addition to a lengthy service life

    - by user74606
    In mining in stone crushing, our machinery company's encounter becomes much more apparent. As a consequence of production capacity in between 600~800t/h of mining stone crusher, stone is mine Mobile Cone Crushing Plant Price 25~40 times, effectively solved the initially mining stone crusher operation because of low yield prices, no upkeep problems. Full chunk of mining stone crusher. Maximum particle size for crushing 1000x1200mm, an effective answer for the original side is mine stone provide, storing significant chunks of stone can not use complications in mines. Completed goods granularity is modest, only 2~15mm, an effective option for the original mine stone size, generally blocking chute production was an issue even the grinding machine. Two types of material mixed great uniformity, desulfurization of mining stone by adding weight considerably. Present quantity added is often reached 60%, effectively minimizing the cost of raw supplies. Electrical energy consumption has fallen. Dropped 1~2KWh/t tons of mining stone electrical energy consumption, annual electricity savings of one hundred,000 yuan. Efficient labor intensity of workers and also the atmosphere. Due to mine stone powder packing machine price a high degree of automation, with out human make contact with supplies, workers working circumstances enhanced significantly. Positive aspects, and along with mine for stone crushing, CS series cone Crusher has the following efficiency traits. CS series cone Crusher Chamber is divided into 3 unique designs, the user is usually chosen in accordance with the scenario on site crushing efficiency is high, uniform item size, grain shape, rolling mortar wall friction and put on uniform in addition to a extended service life of crushing cavity-. CS series cone Crusher utilizes a one of a kind dust-proof seal, sealing dependable, properly extend the service life of the lubricant replacement cycle and parts. CS series Sprial Sand washer price manufacture of important components to choose unique materials. Each and every stroke left rolling mortar wall of broken cone distances, by permitting a lot more products into the crushing cavity, as well as the formation of big discharge volume, speed of supplies by way of the crushing Chamber. This machine makes use of the principle of crushing cavity, also as unique laminated crushing, particle fragmentation, so that the completed product drastically improved the proportions of a cube, needle-shaped stones to lower particle levels extra evenly.

    Read the article

  • The ping response time doesn't reflect the real network response time

    - by yangchenyun
    I encountered a weird problem that the response time returned by ping is almost fixed at 98ms. Either I ping the gateway, or I ping a local host or a internet host. The response time is always around 98ms although the actual delay is obvious. However, the reverse ping (from a local machine to this host) works properly. The following is my route table and the result: route -n Kernel IP routing table Destination Gateway Genmask Flags Metric Ref Use Iface 0.0.0.0 192.168.1.1 0.0.0.0 UG 100 0 0 eth1 60.194.136.0 0.0.0.0 255.255.255.0 U 0 0 0 eth0 169.254.0.0 0.0.0.0 255.255.0.0 U 1000 0 0 eth1 192.168.1.0 0.0.0.0 255.255.255.0 U 0 0 0 eth1 # ping the gateway ping 192.168.1.1 PING 192.168.1.1 (192.168.1.1) 56(84) bytes of data. 64 bytes from 192.168.1.1: icmp_req=1 ttl=64 time=98.7 ms 64 bytes from 192.168.1.1: icmp_req=2 ttl=64 time=97.0 ms 64 bytes from 192.168.1.1: icmp_req=3 ttl=64 time=96.0 ms 64 bytes from 192.168.1.1: icmp_req=4 ttl=64 time=94.9 ms 64 bytes from 192.168.1.1: icmp_req=5 ttl=64 time=94.0 ms ^C --- 192.168.1.1 ping statistics --- 5 packets transmitted, 5 received, 0% packet loss, time 4004ms rtt min/avg/max/mdev = 94.030/96.149/98.744/1.673 ms #ping a local machine ping 192.168.1.88 PING 192.168.1.88 (192.168.1.88) 56(84) bytes of data. 64 bytes from 192.168.1.88: icmp_req=1 ttl=64 time=98.7 ms 64 bytes from 192.168.1.88: icmp_req=2 ttl=64 time=96.9 ms 64 bytes from 192.168.1.88: icmp_req=3 ttl=64 time=96.0 ms 64 bytes from 192.168.1.88: icmp_req=4 ttl=64 time=95.0 ms ^C --- 192.168.1.88 ping statistics --- 4 packets transmitted, 4 received, 0% packet loss, time 3003ms rtt min/avg/max/mdev = 95.003/96.696/98.786/1.428 ms #ping a internet host ping google.com PING google.com (74.125.128.139) 56(84) bytes of data. 64 bytes from hg-in-f139.1e100.net (74.125.128.139): icmp_req=1 ttl=42 time=99.8 ms 64 bytes from hg-in-f139.1e100.net (74.125.128.139): icmp_req=2 ttl=42 time=99.9 ms 64 bytes from hg-in-f139.1e100.net (74.125.128.139): icmp_req=3 ttl=42 time=99.9 ms 64 bytes from hg-in-f139.1e100.net (74.125.128.139): icmp_req=4 ttl=42 time=99.9 ms ^C64 bytes from hg-in-f139.1e100.net (74.125.128.139): icmp_req=5 ttl=42 time=99.9 ms --- google.com ping statistics --- 5 packets transmitted, 5 received, 0% packet loss, time 32799ms rtt min/avg/max/mdev = 99.862/99.925/99.944/0.284 ms I am running iperf to test the bandwidth, the rate is quite low for a LAN connection. iperf -c 192.168.1.87 -t 50 -i 10 -f M ------------------------------------------------------------ Client connecting to 192.168.1.87, TCP port 5001 TCP window size: 0.06 MByte (default) ------------------------------------------------------------ [ 4] local 192.168.1.139 port 54697 connected with 192.168.1.87 port 5001 [ ID] Interval Transfer Bandwidth [ 4] 0.0-10.0 sec 6.12 MBytes 0.61 MBytes/sec [ 4] 10.0-20.0 sec 6.38 MBytes 0.64 MBytes/sec [ 4] 20.0-30.0 sec 6.38 MBytes 0.64 MBytes/sec [ 4] 30.0-40.0 sec 6.25 MBytes 0.62 MBytes/sec [ 4] 40.0-50.0 sec 6.38 MBytes 0.64 MBytes/sec [ 4] 0.0-50.1 sec 31.6 MBytes 0.63 MBytes/sec

    Read the article

  • Connecting multiple ColdFusion 10 instances to a single Apache 2.2 server

    - by Adam Cameron
    This is on Windows 7 Home Premium edition. I have got two ColdFusion 10 (updater 2) instances: "cfusion" (the default one), and "scratch". I have got a single instance of Apache 2.2 running. Within Apache, I have set up two virtual hosts, each of which needs to be served by a different ColdFusion instance. Each of the CF instances serves files fine via Tomcat's internal web server. Apache serves vanilla HTML files fine too. So both CF instances, and both virtual hosts separately work OK. I can get wsconfig.exe to connect either one of the CF instances to the Apache server, and serve CF files via Apache & that instance. However I cannot find a way of connecting the second CF instance to Apache as well, so that both CF instances are conected, each serving one of the virtual hosts. WSConfig doesn't seem to understand the notion of "multiple CF instances", and the changes it makes to the httpd.conf (via mod_jk.conf) does not seem to be implemented in such a way as to accommodate multiple CF instances talking to a single Apache instance, or multiple virtual hosts. I freely admit to not being confident enough with how mod_jk (or even really httpd.conf) works to be able to guess if I can change stuff to make it work. If I try to add the second CF instance using WSConfig, I just get a message "the web server is already configured for ColdFusion". Be that as it may... not the instance of ColdFusion I want to connect it to! If I remove the existing connector to whichever instance is already connected, I can then connect the other one no problems. Not that this helps, but it demonstrates that the CF instance can connect to Apache. This all used to be fairly straight fwd under older versions of CF and JRun :-( The only docs I have found are on the "Connect multiple Apache virtual hosts on a web server to a single ColdFusion server" page, but that specifically only deals with a single CF instance. There is no equivalent page for multiple CF instances. I'm kinda hoping I can move some of the mod_jk config into my virtual host entries in httpd-vhosts.conf (this is how it used to work for JRun), but I've no idea what to put where. I think I've covered all the necessary info here? If not, sing out and I'll add more. Thanks. PS: tried to specifically tag this as "ColdFusion-10" as the answer will be different from previous CF versions, but it won't let me cos my rep on this site is too low (odd how it doesn't consider my rep from other S/O sites...). If someone with sufficient rep can add it, that'd be cool: it's probably a valid tag to have. Ta.

    Read the article

  • apcupsd on Linux does not report on APC BackUPS Pro 900

    - by lserni
    From what documentation I could find, the UPS should be (is!) supported by Linux and ought to work with apcupsd. I looked for specific problems such as the infamous Microlink protocol, and found none. I have found a feedback from a guy in UK that reports using this very model on a not-too-different OS version (his OpenSuSE 12.1, mine 12.3 x86_64). The USB port is detected, lsusb reports Bus 002 Device 003: ID 051d:0002 American Power Conversion Uninterruptible Power Supply and lsusb -v -s002:003 confirms and expands: Bus 002 Device 003: ID 051d:0002 American Power Conversion Uninterruptible Power Supply Device Descriptor: bLength 18 bDescriptorType 1 bcdUSB 2.00 bDeviceClass 0 (Defined at Interface level) bDeviceSubClass 0 bDeviceProtocol 0 bMaxPacketSize0 64 idVendor 0x051d American Power Conversion idProduct 0x0002 Uninterruptible Power Supply bcdDevice 0.90 iManufacturer 1 American Power Conversion iProduct 2 Back-UPS RS 900G FW:879.L4 .I USB FW:L4 bNumConfigurations 1 Configuration Descriptor: [...] Interface Descriptor: [...] bInterfaceClass 3 Human Interface Device bInterfaceSubClass 0 No Subclass bInterfaceProtocol 0 None iInterface 0 HID Device Descriptor: bLength 9 bDescriptorType 33 bcdHID 1.00 bCountryCode 33 US bNumDescriptors 1 bDescriptorType 34 Report wDescriptorLength 1134 Report Descriptors: ** UNAVAILABLE ** Endpoint Descriptor: bLength 7 bDescriptorType 5 bEndpointAddress 0x81 EP 1 IN bmAttributes 3 Transfer Type Interrupt Synch Type None Usage Type Data wMaxPacketSize 0x0008 1x 8 bytes bInterval 100 Device Status: 0x0000 (Bus Powered) The kernel recognizes this and duly sets up crw------- 1 root root 180, 96 Nov 4 16:11 /dev/usb/hiddev0 As far as I know, everything is as it should be. I have put the standard configuration in /etc/apcupsd/apcupsd.conf (which is Unix-terminated, ASCII-only, no BOM (just in case)) UPSCABLE usb UPSTYPE usb DEVICE (I have also tried commenting out DEVICE, and setting a device of /dev/puppa results in an access attempt to /dev/puppa, not some /var/lib/dev/puppa or /dev/puppa\r\n). Yet, what apcaccess tells me is VERSION : 3.14.10 (13 September 2011) suse CABLE : USB Cable DRIVER : USB UPS Driver UPSMODE : Stand Alone STARTTIME: 2013-11-04 16:24:22 +0100 MODEL : STATUS : NOBATT LINEV : 000.0 Volts LOADPCT : 0.0 Percent Load Capacity BCHARGE : 000.0 Percent TIMELEFT : 0.0 Minutes MBATTCHG : 5 Percent MINTIMEL : 3 Minutes MAXTIME : 0 Seconds SENSE : Low LOTRANS : 000.0 Volts HITRANS : 000.0 Volts It doesn't recognize the model, and reports no battery (and no voltage). This confirms that it's not the Microlink problem, or it would report the battery status, if precious little else. If I disconnect the USB cable, I get an apcupsd message to the effect that communications have been lost; and I get the "communication restored" broadcast too, if I reconnect the cable. apcupsd is monitoring. So everything tells me that it should work -- only it doesn't. Does anyone spot what I'm missing?

    Read the article

  • ffmpeg video4linux2 at specified resolution

    - by wim
    When I'm trying to record a clip from my webcam, using: ffmpeg -f video4linux2 -s 640x480 -i /dev/video0 /tmp/spam.avi I get annoying problem with very low resolution video, and there is a message from ffmpeg saying: [video4linux2,v4l2 @ 0x2bff3e0] The V4L2 driver changed the video from 800x600 to 176x144 I have tried not specifying -s, or trying other sizes like 800x600, and always it forces me back to 176x144. Why is this and how can I prevent it? My webcam is one of those Logitech 9000 Pro, I know it supports better resolutions than this and I can see with v4l2-ctl --list-formats-ext that it goes up to at least 800x600. edit: complete console output follows wim@wim-desktop:~$ ffmpeg -f video4linux2 -s 640x480 -i /dev/video0 /tmp/spam.avi ffmpeg version git-2012-11-20-70c0f13 Copyright (c) 2000-2012 the FFmpeg developers built on Nov 21 2012 00:09:36 with gcc 4.6 (Ubuntu/Linaro 4.6.3-1ubuntu5) configuration: --enable-gpl --enable-libfaac --enable-libfdk-aac --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-librtmp --enable-libtheora --enable-libvorbis --enable-libvpx --enable-x11grab --enable-libx264 --enable-nonfree --enable-version3 libavutil 52. 8.100 / 52. 8.100 libavcodec 54. 73.100 / 54. 73.100 libavformat 54. 37.100 / 54. 37.100 libavdevice 54. 3.100 / 54. 3.100 libavfilter 3. 23.101 / 3. 23.101 libswscale 2. 1.102 / 2. 1.102 libswresample 0. 17.100 / 0. 17.100 libpostproc 52. 2.100 / 52. 2.100 [video4linux2,v4l2 @ 0x37a33e0] The V4L2 driver changed the video from 640x480 to 176x144 [video4linux2,v4l2 @ 0x37a33e0] Estimating duration from bitrate, this may be inaccurate Input #0, video4linux2,v4l2, from '/dev/video0': Duration: N/A, start: 37066.740548, bitrate: 6082 kb/s Stream #0:0: Video: rawvideo (YUY2 / 0x32595559), yuyv422, 176x144, 6082 kb/s, 15 tbr, 1000k tbn, 15 tbc File '/tmp/spam.avi' already exists. Overwrite ? [y/N] y Output #0, avi, to '/tmp/spam.avi': Metadata: ISFT : Lavf54.37.100 Stream #0:0: Video: mpeg4 (FMP4 / 0x34504D46), yuv420p, 176x144, q=2-31, 200 kb/s, 15 tbn, 15 tbc Stream mapping: Stream #0:0 -> #0:0 (rawvideo -> mpeg4) Press [q] to stop, [?] for help frame= 95 fps= 22 q=2.0 Lsize= 88kB time=00:00:13.86 bitrate= 51.8kbits/s video:77kB audio:0kB subtitle:0 global headers:0kB muxing overhead 13.553706%

    Read the article

  • Problems with Windows XP Plug and Play devices, maybe relating to MSVCR71.dll

    - by Richard
    I believe this question is unanswered as of now so I appologize if I've overlooked it. I have been having trouble some external devices with windows recently and I'm trying my darnedest to get to the bottom of it. At first, my Zero Tension USB mouse would stop working...as in the laser in the bottom of it would be on and would register movement, but the mouse on the screen wouldn't budge even an inch. At first this would happen randomly and then it would correct itself. As time went on, it became more and more frequent. At some point, the computer would make the "doo doo" sound of plugging or unplugging a USB device when the mouse stopped/started working. I dealt with it for a while and usually if I rebooted my machine, the mouse would work again for a day or two. As more time has gone on, the computer fully does not recognize the mouse AT ALL...I have another mouse that I use with the computer that works just fine and cannot seem to figure out why my Zero Tension mouse has failed. I tried plugging the Zero Tension mouse into my Mac and low and behold, it works without hesitation and never stops on me... Needless to say, I am stumped about this. I figured because I had another mouse I could deal with the loss of my fancy one for now...until my speakers stopped being recognized. I have a set of Logitec speakers that I have plugged into my sound card. Again, every now and again the audio devices would cease to be recognized by my computer, but a reboot would fix the problem. Now my speakers do not work at all with my computer and I feel like it's time to ask for help. My computer seems to be having a neural shutdown...where I can plug in devices and the computer doesn't seem to notice anything wrong, but none of the devices work. I hope this doesn't get any worse! Please help! Also, on a potentially (un)related note, when I start up my machine I get the message "This application has failed to start because Msvcp71.dll was not found. Re-installing the application may fix this problem." in reference to qbupdate.exe I don't know if that DLL being messed up has anything to do with my mouse or speakers, but I figure it might...anyway, thanks in advance for an answer and let me know if I need to clarify anything. Let me sum up: Zero Tension Mouse gradually stopped working Logitec Speakers gradually stopped working MSVCR71.dll seems to be messed up I don't know if any of those are related but any help would be much appreciated

    Read the article

  • Finding underlying cause of Window 7 Account corruption.

    - by Carl Jokl
    I have been having trouble with my Sister's computer which I built. It is running Windows 7 Ultimate x64. The problem is that I have had problems with the accounts becoming corrupted. First problems manifest themselves in the form of Windows saying the profile failed to be loaded properly and a temporary profile. Eventually the account will not allow login at all. An error message along the lines the authentication service failing the login. I have found information about this problem and how to fix it. The problem being that something has corrupted the account profile and backing up and recreating the accounts fixes the problem. I have been able to fix things and get logins working again but over the period of usually about a week it happens again. Bit by bit the accounts corrupt and then it is back to square one. I am frustrated because I don't know what the underlying cause of the problem is i.e. what is causing the accounts to be corrupted in the first place. At the moment I am just treating the symptoms. I was hoping someone who may have more experience with dealing with this problem might be able to help me find the root cause. Some articles suggest that Norton Internet Security is a big culprit of this problem which is installed. I could try uninstalling Norton and see if it helps. The one thing which is different about this computer to any other I have built is that it has a solid state drive. Actually it has both a hard drive and solid state drive. The documents and settings i.e. the Users directory is stored on the hard drive. This was done following an article about moving the user account data onto a separate drive on Windows 7 which I found on the Internet. Moving the User accounts is more of a pain under Windows 7 and this solution involved creating a low level file system link to the folder from the boot drive (Solid State) to the Hard Drive. The idea is that the computer behaves just as if it is accessing the User's folder from the boot drive but actually the data is stored on the hard drive. This may have nothing to do with the cause of the problem but due to the problem being user account corruption it is a possibility I have not been able to rule out. Any help would be appreciated as I would be glad to see the back of this problem.

    Read the article

  • DCHP and Router load testing

    - by John H
    I manage a campground wifi network with an average of 10 - 60 active users. I have encountered issues where the router starts acting flaky (failing to assign DHCP or failing to pass traffic) without any clear warning (low cpu utilization, etc). I upgraded the router a couple times and ended up with a Netgear ProSafe VPN router that seems to be handling the traffic. The interesting thing is that the Netgear has lower specs than the Buffalo router it replaced, indicating the issue is with the DD-WRT firmware. While I'll be pursuing this issue on the dd-wrt forums, I need a way to test routers. My vision is having 1-2 computers connected on the LAN side and 1-2 computers connected on the WAN side. I want the LAN computers to be generating various type of traffic and connections, as well as requesting DCHP addresses. A few notes: The wireless aspect should be a non-issue. Most clients would connect to a wireless bridge and come into the router through a network cable. I had a monitoring server with Nagios running check_dhcp against the router. This server was connected directly by a network cable, eliminating wifi bridges and other devices from the equation. This question is somewhat related, but not exactly: Load testing wireless LANs I am going to look at IxChariot. While I'd ideally like to use a 1 computer on each side running Linux and preferably free software, I can entertain running Windows, multiple computers, or non-free software. Total bandwidth doesn't seem to be the issue. I can transfer large files all day. Even on the busiest days, the users seemed to only pull ~5Mbps. There is very little "LAN to LAN traffic" and most of it might never have reached the main router. The issue I need to test for seems to be tied to active users, or more appropriately, active sessions. I know active users or active clients is a meaningless term from a router standpoint and wouldn't mind having more appropriate terms to use. Summary: I need a way to test a routers ability in handling traffic from a large number of clients. My current strategy is to purchase a router, deploy it, and see how it fails in the live environment.

    Read the article

  • Linux per-process resource limits - a deep Red Hat Mystery

    - by BobBanana
    I have my own multithreaded C program which scales in speed smoothly with the number of CPU cores.. I can run it with 1, 2, 3, etc threads and get linear speedup.. up to about 5.5x speed on a 6-core CPU on a Ubuntu Linux box. I had an opportunity to run the program on a very high end Sunfire x4450 with 4 quad-core Xeon processors, running Red Hat Enterprise Linux. I was eagerly anticipating seeing how fast the 16 cores could run my program with 16 threads.. But it runs at the same speed as just TWO threads! Much hair-pulling and debugging later, I see that my program really is creating all the threads, they really are running simultaneously, but the threads themselves are slower than they should be. 2 threads runs about 1.7x faster than 1, but 3, 4, 8, 10, 16 threads all run at just net 1.9x! I can see all the threads are running (not stalled or sleeping), they're just slow. To check that the HARDWARE wasn't at fault, I ran SIXTEEN copies of my program independently, simultaneously. They all ran at full speed. There really are 16 cores and they really do run at full speed and there really is enough RAM (in fact this machine has 64GB, and I only use 1GB per process). So, my question is if there's some OPERATING SYSTEM explanation, perhaps some per-process resource limit which automatically scales back thread scheduling to keep one process from hogging the machine. Clues are: My program does not access the disk or network. It's CPU limited. Its speed scales linearly on a single CPU box in Ubuntu Linux with a hexacore i7 for 1-6 threads. 6 threads is effectively 6x speedup. My program never runs faster than 2x speedup on this 16 core Sunfire Xeon box, for any number of threads from 2-16. Running 16 copies of my program single threaded runs perfectly, all 16 running at once at full speed. top shows 1600% of CPUs allocated. /proc/cpuinfo shows all 16 cores running at full 2.9GHz speed (not low frequency idle speed of 1.6GHz) There's 48GB of RAM free, it is not swapping. What's happening? Is there some process CPU limit policy? How could I measure it if so? What else could explain this behavior? Thanks for your ideas to solve this, the Great Xeon Slowdown Mystery of 2010!

    Read the article

  • Real-time offline folder-to-folder backup application needed (Windows)

    - by niktech
    I recently started using Intel Matrix Storage RAID solution that allowed me to use my 5 1TB drives for two RAID volumes. First one a 1TB RAID 0 striped across all 5 drives and second one a RAID 5 across the rest of the free space on all drives (around 2.85TB usable space). The RAID 0 I use for OS, applications and games while the RAID 5 I use as a more-permanent type storage (photos, etc). Now I do realize that running the OS and applications on RAID 0 across 5 drives is very dangerous, which is what brings up the following question. Is there a reliable freeware realtime backup application that can backup a set of folders from one drive to another drive (no online backups needed)? I've already tried a few (Mozy, Yadis, Comodo Backup, GFI Backup, Idoo, Crash Plan) but none meet my requirements: Low CPU and RAM usage. Realtime Backups - as soon as a file is modified in the source folder, it is added to the backup queue which will be processed with the lowest priority when the CPU is idle. This backup queue should persist in cases of computer restarts (ie: the source and destination folders should always have the same set of files, except for the ones waiting in the backup queue). Incremental Backups - if only 10 bytes changed in a 1GB file, the app should only copy those 10 new bytes. Ability to back up locked and opened files (some apps, like Yadis, can't back up critical files like browser favorites). Ability to run as a service (no need for any user to log-in to have the app started). Optional requirements: Compression of the destination into a well-known format (RAR, Zip) that can be directly read without the use of the application. Preset source folders (such as Browser Favorites, Game Saves, Application Settings, etc). The idea is to use RAID 0 array as "semi-persistent RAM-like" storage which in case of a failure can be quickly rebuilt by reinstalling the OS, apps and games and copying over the settings, saves, favorites from the RAID 5. I'm also thinking of taking this RAID 0 as RAM idea to the extreme with SSDs (as soon as we get some nice 6Gb/s SATA III SSDs out there), where a couple of SSDs chained in RAID 0 will work as yet another semi-persistent cache layer sitting between the RAM and the HD. I'm just hoping there already exists an application that satisfies these requirements... otherwise I'll have to write one myself, which I would prefer not to do.

    Read the article

  • Impact of the L3 cache on performance - worth a dual-processor system?

    - by Dan Nissenbaum
    I will be purchasing a new high-end system, and I would like to have a better sense of whether a dual-processor Xeon system (I am looking at the new, high-end Xeon E5-2687W) might, realistically, provide a noticeable performance improvement due to the doubling of the L3 cache (20 MB per CPU). (This is in addition to the occasional added advantage due to the doubling of cores and RAM.) My usage scenario is, roughly, that I have many background applications running at any time - 3 or 4 data compression/backup applications, a low-impact web server, one or two virtual machines at any given time (usually fairly idle), and perhaps 20 utility programs that utilize a noticeable (but small) portion of the CPU cores. In total, when I am not actively using the computer, about 25% of the total CPU power is utilized in my current i7-970 6-core (12 thread) system. When I am doing routine work, the CPU utilization often exceeds 50%, and occasionally hits 75%-80%. The Xeon E5-2687W is not only a second-generation i7 (so should improve performance for that reason), but also has 8 cores (16 threads), rather than 6 cores. For this reason, I expect to run into the 75% CPU range even less frequently. Nonetheless, the ability to double the cores and the RAM is a consideration. However, in the end, I believe this decision comes down to whether the doubling of the L3 cache will provide a noticeable improvement. There are many benchmarks, and a lot of discussion, regarding CPU power. However, I find very little discussion of L3 cache utilization, and how increases in the L3 cache (such as doubling it with dual processors) affect performance. For example: If there are only two processes running, but each benefits from a large L3 cache (such as might be the case for background processes that frequently scan the file system), perhaps the overall system performance might noticeably improve with dual CPU's - even if only a single core is active on each CPU - due to each process having double the effective L3 cache. I am hoping that someone has a sense of the benefits of increasing (or doubling) the L3 cache size. Note: the CPU I am considering (the Xeon E5-2687W) has 20 MB L3 cache, so a system with dual CPU's would have 40 MB L3 cache.

    Read the article

  • UCARP: prevent the original master from taking over the VIP when it comes back after failure?

    - by quanta
    Keepalived can do this by combining the nopreempt option and the BACKUP state on the both nodes: Prevent VRRP Master from becoming Master once it has failed Prevent master to fall back to master after failure How about the UCARP? Name : ucarp Arch : x86_64 Version : 1.5.2 Release : 1.el5.rf Size : 81 k Repo : installed Summary : Common Address Redundancy Protocol (CARP) for Unix URL : http://www.ucarp.org/ License : BSD Description: UCARP allows a couple of hosts to share common virtual IP addresses in order : to provide automatic failover. It is a portable userland implementation of the : secure and patent-free Common Address Redundancy Protocol (CARP, OpenBSD's : alternative to the patents-bloated VRRP). : Strong points of the CARP protocol are: very low overhead, cryptographically : signed messages, interoperability between different operating systems and no : need for any dedicated extra network link between redundant hosts. If I don't use the --preempt option and set the --advskew to the same value, both nodes become master. /etc/sysconfig/carp/vip-010.conf # Virtual IP configuration file for UCARP # The number (from 001 to 255) in the name of the file is the identifier # $Id: vip-001.conf.example 1527 2004-07-09 15:23:54Z dude $ # Set the same password on all mamchines sharing the same virtual IP PASSWORD="pa$$w0rd" # You are required to have an IPADDR= line in the configuration file for # this interface (so no DHCP allowed) BIND_INTERFACE="eth0" # Do *NOT* use a main interface for the virtual IP, use an ethX:Y alias # with the corresponding /etc/sysconfig/network-scripts/ifcfg-ethX:Y file # already configured and ith ONBOOT=no VIP_INTERFACE="eth0:0" # If you have extra options to add, see "ucarp --help" output # (the lower the "-k <val>" the higher priority and "-P" to become master ASAP) OPTIONS="-z -k 255" /etc/sysconfig/network-scripts/ifcfg-eth0:0 DEVICE=eth0:0 ONBOOT=no BOOTPROTO= IPADDR=192.168.6.8 NETMASK=255.255.255.0 USERCTL=yes IPV6INIT=no node 1: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast qlen 1000 link/ether c6:9b:8e:af:a7:69 brd ff:ff:ff:ff:ff:ff inet 192.168.6.192/24 brd 192.168.6.255 scope global eth0 inet 192.168.6.8/24 brd 192.168.6.255 scope global secondary eth0:0 inet6 fe80::c49b:8eff:feaf:a769/64 scope link valid_lft forever preferred_lft forever node 2: eth1: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast qlen 1000 link/ether 00:30:48:f7:0f:81 brd ff:ff:ff:ff:ff:ff inet 192.168.6.38/24 brd 192.168.6.255 scope global eth1 inet 192.168.6.8/24 brd 192.168.6.255 scope global secondary eth1:0 inet6 fe80::230:48ff:fef7:f81/64 scope link valid_lft forever preferred_lft forever

    Read the article

  • Old CRT screen's high resolution doesn't work anymore on windows 7

    - by Mixxiphoid
    One year ago I decided to switch from Windows XP to Windows 7. I had a 17" CRT monitor with a screen resolution of 1600x1200 which worked fine on Windows XP. While installing Windows 7 everything went well until Windows 7 was going to install the video card its driver. Windows 7 puts the screen to its recommended resolution and my screen became black. I waited a few minutes to be sure the installation was finished. I turned off the computer by hand and restarted the computer on a resolution of 800x640. When windows 7 was done installing I went to screen resolutions and the resolution of 1600x1200 was on the top of the list with '(recommended)' next to it. I tried putting it on 1600x1200 but again my screen went black. I installed all windows 7 updates including the video card driver from the NVidia site (NOT from Windows 7). I tried about everything to make it work on 1600x1200 but with no succes. The highest resolution I got with the crt monitor was 1280x1024. I had a TFT screen which had 1280x1024 as max resolution and had better colors, so I used that one till today. My video card is 9600GT and my power supply is beyond sufficient. I even tried to install the driver I had on XP to see if it worked, but no results. I tried classic mode on windows 7, changed the dpi, the frequentie and the monitor settings, but nothing worked. I really like a vertical resolution of 1200, but it seems today I'm bound to all those standard monitors with a resolution of 1980x1024... Can anybody explain to me what the cause is that it worked on Windows XP but not on Windows 7? And maybe a solution to the problem (I actually gave up on getting it fixed...) Thanks a lot in advance. SOLUTION I downloaded the according monitor driver and installed it. Next I rebooted my computer on low resolution (800x640) and connected the CRT monitor. When Windows 7 booted successfully I went to computer management and 'update the driver' of my monitor. I manually selected 'Generic PnP monitor' and made that one active. I want to advanced settings at 'Screen resolution' and selected the mode '1600x1200 (32-bit) 80 Hertz (95 Hertz did not work). Now I had my resolution on 1600x1200. I repeated the earlier step to select the original monitor again instead of the Generic monitor. Quite a way to solve this problem, but it worked! Thanks a lot you all.

    Read the article

  • PSU failing or Mainboard failing?

    - by Andrei Rinea
    I am having some troubles lately powering on my desktop workstation. While starting up the PC after being off for hours (usually at least 8 hours) it randomly fails to do so. What happens is that : I press the power button; nothing happens I can hear a moderate buzzing noise at the back of the PC (near the PSU); but I can't say for sure that it's not from the mainboard. If I insist pressing the power button a few times in 1-2 minutes it'll start Another route would be that instead of (3) I will plug off the power cable from the PSU and wait for 30 seconds. Then I will press the power on and keep it for 30-60 seconds (I had some success at notebooks with a similar approach). Then I will plug back the cable in the PSU, press only once the power button and it will start normally. Also while running normally I keep hearing some low buzzing which seems to be fan-RPM-related (i.e. when processing images or doing CPU intensive work). What should I look into? UPDATE It's getting worse. It took more than 10 retries today and almost 20 minutes to start the computer. I tried the paperclip trick and the PSU behaves perfectly. I managed to start the computer like so : I pressed the on-button a few times and then left the PC in a pre-startup state (the fans were working the buzzing noise was strong and I went to eat. I thought I won't lit the house on fire so fast and without smelling. Back, after 10-15 min the computer booted up! Discussed with a fellow at Intel and he told me the capacitors on the mainboard are probably a bit shot. If they are shot, he said, it should start up warm perfectly. So I did restart it, warm, a few times (5 sec cooldown and then 40 sec cooldown and it started up perfectly). I can either replace the capacitors on the mainboard (doesn't sound worth it or replace the mainboard (this one sucks too :)) ) FINAL INFO : It was the PSU after all. Although it was powering the IDEs and SATAs the Mainboard power module was failing. I bought another mainboard just to find out that this wasn't the cause. Now I'll have to return it somehow. The spare PSU is now in the computer and doing well.. Although larger (500W), it's like a plane taking off.. I need a better one.

    Read the article

< Previous Page | 190 191 192 193 194 195 196 197 198 199 200 201  | Next Page >