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  • Does the 80/20 rule of time management apply to developers?

    - by Dean
    Jeff's recent article linked to a time management example of the First Fit Decreasing algorithm, which talked about the Pareto principle (or, the 80/20 rule) of time management, that is, that 80% of the work we produce in 20% of our time. Now we've all heard the programmer quote: The first 90% of the code accounts for the first 90% of the development time. The remaining 10% of the code accounts for the other 90% of the development time. But all jokes aside, it is often as if 20% of your code is to do what you want, and the other 80% is to handle exceptions... so does the 80/20 rule really apply to developers? Does anyone have any examples of why it does / does not apply to us?

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  • PHP - How do i display the first 20 li then have a link to display more (gallery)

    - by Matt Rogers
    I want to display about 20 li on a page with a link at the bottom that says something like 'display more'. This link will then clear the first 20 and display the next 20. How should i go about doing this. (I am creating a gallery) I was thinking about using PHP and MySQL. However for what I am doing I do not really need to store it in a database so is there an easier way of doing it only using html, php or javascript? thanks

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  • Does it help to be core programmer of a product (product meant for social good ) for getting into Ph. D. in top university in USA say top 20?

    - by Maddy.Shik
    Hey i am working upon a product as core developer which will be launched in USA market in few months if successful. Can this factor improve my chance to get Ph.D. in good university(say top 20 in US). Normally good universities like CMU, standford, MIT, Cornell are more interested in student's profile like research work, under graduate school etc. I am not passed out from very good university its ranked in top 20 of India only. Neither did i do research work till now. But being one of founding member of company and developing product for same, i want to know if this factor can help and to what extent. For university with ranking lower than 20 what matters most is GRE General score and GPA but i guess top university must be appreciating a person's real efforts.

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  • MySQL 1064 error, works in command line and phpMyAdmin; not in app

    - by hundleyj
    Here is my query: select * from (select *, 3956 * 2 * ASIN(SQRT(POWER(SIN(RADIANS(45.5200077 - lat)/ 2), 2) + COS(RADIANS(45.5200077)) * COS(RADIANS(lat)) * POWER(SIN(RADIANS(-122.6942014 - lng)/2),2))) AS distance from stops order by distance, route asc) as p group by route, dir order by distance asc limit 10 This works fine at the command line and in PHPMyAdmin. I'm using Dbslayer to connect to MySQL via my JavaScript backend, and the request is returning a 1064 error. Here is the encoded DBSlayer request string: http://localhost:9090/db?{%22SQL%22:%22select%20*%20from%20%28select%20*,%203956%20*%202%20*%20ASIN%28SQRT%28POWER%28SIN%28RADIANS%2845.5200077%20-%20lat%29/%202%29,%202%29%20+%20COS%28RADIANS%2845.5200077%29%29%20*%20COS%28RADIANS%28lat%29%29%20*%20POWER%28SIN%28RADIANS%28-122.6942014%20-%20lng%29/2%29,2%29%29%29%20AS%20distance%20from%20%60stops%60%20order%20by%20%60distance%60,%20%60route%60%20asc%29%20as%20p%20group%20by%20%60route%60,%20%60dir%60%20order%20by%20%60distance%60%20asc%20limit%2010%22} And the response: {"MYSQL_ERRNO" : 1064 , "MYSQL_ERROR" : "You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near '(RADIANS(45.5200077)) * COS(RADIANS(lat)) * POWER(SIN(RADIANS(-122.6942014 - lng' at line 1" , "SERVER" : "trimet"} Thanks!

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  • Ich bin jetzt Oracle Certified Associate!

    - by britta.wolf
    Jan Peuker, Absolvent der Hochschule Augsburg und University of Melbourne, hat vor kurzem das Zertifikat Oracle Database 10g Administrator Certified Associate erworben. Er hat uns netterweise mit diesem kleinen Text versorgt: "Die Oracle Zertifizierung beginnt üblicherweise mit dem Oracle Certified Associate. Für diese Zertifizierung ist noch keine tiefgehende Praxiserfahrung notwendig. Um den Titel des Oracle Database 11g Administrator Certified Associate zu erlangen, muss man eine Prüfung zu SQL (z.B. 1Z0-051) sowie eine Prüfung zur Administration (1Z0-045) ablegen. Beide Prüfungen dauern 2 Stunden und haben ca. 80 Fragen von denen etwa drei Viertel richtig beantwortet werden müssen, um zu bestehen. Eine Note gibt es nicht. Die Prüfungen finden immer elektronisch statt, die Software erlaubt das Überspringen und Markieren von Fragen. Während meiner Arbeitszeit nach meinem ersten Studium hatte ich häufig mit dem Oracle Datenbanksystem zu tun. Als ich mein Aufbaustudium an der University of Melbourne absolvierte, wurde mir von der Studienberaterin vorgeschlagen, den Kurs „Advanced Database Administration" zu belegen. Dieser beruht vollständig auf den offiziellen Oracle Trainings-Unterlagen zur Prüfung in Oracle Administration und erlaubt daher die Teilnahme an der offiziellen Zertifizierung. Im Gegensatz zur SQL Prüfung, deren Inhalt man sich gut selbst aneignen kann, hilft bei der Administrator-Zertifizierung ein echter Kurs mit Seminar ungemein. Viele Konzepte lassen sich schwer aus einem Buch lernen. Die Bestandteile der SGA oder das Anlegen von Benutzern mögen leicht zugänglich sein, Redo- und Undo-Management sowie Backup und Recovery kann man nur verstehen, wenn man Beispiele hat und diese an einem Testsystem (keine "kleine" XE-Datenbank, sondern eine "richtige" Datenbank mit Enterprise Manager) ausprobieren kann. Übermäßig viel Zeit habe ich keinesfalls investiert, weil das Grundsystem sehr logisch ist. Für die weniger nachvollziehbaren Bereiche, besonders die neuen Features, habe ich mir Fachbegriffe auf Lernkarten geschrieben und die Trainingsunterlagen am System durchgespielt. Die Prüfung war für mich überraschend schwer, weil das einfache "Tagesgeschäft" deutlich unterrepräsentiert ist. In den Multiple-Choice-Fragen werden viele Besonderheiten und Use-Cases abgefragt (online findet man viele Beispielfragen). Da beide Tests in Englisch sind, sollte man nicht nur in der Terminologie des Oracle Datenbanksystems sondern auch in Fachbegriffen der Datenbankwelt allgemein bewandert sein. Oft machen einzelne Wörter (z.B. redundant oder synchronized, redo log oder redo log buffer) die richtige Antwort aus, ein signifikanter Anteil der Fragen beruht auf Zeichnungen oder Diagrammen, die beschrieben werden müssen. So muss man z.B. anhand eines Log-Auszugs beurteilen, warum die Datenbank nicht sauber geschlossen wurde. Allgemeines Wissen über Datenbanksysteme hilft leider nicht viel, da überproportional viele Fragen zu Oracle-spezifischen Themen gestellt werden, wie z.B. Optimierungs-Dienste (ADDM), Flashback, SQL Loader und ein wenig PL/SQL. Die SQL Prüfung ist dagegen sehr geradlinig - was aber nicht einfacher heißt. Hier kommt es mehr auf Auswendiglernen von Syntax an, was mir persönlich nicht liegt. Vor allem als Anwendungsprogrammierer kennt man oft proprietäre SQL-Funktionen nicht, es fällt schwer, sich einzelne Datumsberechnungsfunktionen, Typkonvertierungen, Namespaces oder krude Join-Methoden zu merken. Auf all dies wird in der Prüfung aber sehr viel Wert gelegt. Auch hier wird man wieder mit zweideutigen Multiple-Choice Fragen konfrontiert, bei denen sich z.B. nur die Reihenfolge der Parameter unterscheidet. Zudem sind die Parameter auch nicht ausgeschrieben, sondern in einem Entity-Relationship-Diagramm gegeben, wobei man auf die richtigen Datentypen achten muss. Mir persönlich war die Zeit fast zu knapp bemessen, weil man bei vielen Fragen erst ein Diagramm, einen Datenauszug oder einen längeren Text lesen muss, um dann die richtigen Statements zu finden. Hier helfen Lernkarten also nur bedingt - stattdessen üben, üben, üben. Durch den relativ niedrigen Pass-Score von 70% kann man es sich leisten, unsichere Fragen zuerst zu überspringen und erst nachdem alle sicheren beantwortet sind, zu überdenken. Die Prüfung ist auf jeden Fall fair. Ich habe durch das Oracle-Zertifizierungsprogramm viel gelernt. Die Datenbanken unter meiner Aufsicht laufen deutlich performanter und liefern höhere Verfügbarkeit, weil ich Probleme eliminieren konnte, die mir vorher nicht klar waren. Eine klassische Misskonfiguration, volle Archive Logs, weil diese mit zu lange gehaltenem Flashback-Speicher kollidieren, konnte ich bereits in einer der ersten Stunden meines Kurses an der Uni Melbourne mit Hilfe meines Professors klären. Beide Prüfungen waren problemlos parallel zu anderen Prüfungen zu absolvieren. Empfehlen kann ich eine gründliche Online-Recherche aber auch die Oracle Press-Bücher, welche mit Prüfungsfragen am Ende jedes Kapitels aufwarten. So spart man sich Zeit und ist trotzdem gut vorbereitet. Auch wenn ich keine Laufbahn als Administrator einschlagen werde, bin ich froh die zugrundeliegende Technologie vieler Anwendungen besser zu verstehen. Für meine tägliche Arbeit als Anwendungsentwickler hat es mir vor allem geholfen, Oracle-Konzepte z.B. im Bereich der Transaktionssteuerung und Wiederherstellung zu verstehen und damit viele Open Source Produkte jetzt sinnvoller bewerten und empfehlen zu können." Eine Übersicht der Zertifizierungspfade finden Sie auf der Oracle University Webseite (dann einfach "Deutschland""auswählen und anschließend auf den Punkt "Zertifizierungen" klicken).

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  • Split horizon, route filtering, and having RIPv2 announce a non-attached route to host

    - by Paul
    Routers A, B & C live at 10.1.1.1, 10.1.1.2 and 10.1.1.3 on a /24 metro Ethernet subnet. Each router also has its own private subnet on another interface. Router B's private subnet links thru a firewall to a 10.20.20.0 network at another organization. Router B redistributes to A and C several static routes for hosts on 10.20.20.0. However, a new host 10.20.20.5/32 must be reached via a different path that goes through router C. I know that C can advertise this host-based route with no problem, but I'd like to keep all my 10.20.20.x static routes in one place. So, how can B tell A via RIPv2 to send packets for 10.20.20.5/32 to C? So far it looks like I need no ip split-horizon on router B's 10.1.1.2 interface, perhaps because B has already learned from C other routes with a next hop of 10.1.1.3. But how does RIPv2 split horizon with no auto-summary and network 10.0.0.0 really work? If B learns a route to ANY 10.x.x.x network or host from A or C, is that enough for split horizon to keep it from redistributing ip route 10.20.20.5 255.255.255.255 10.1.1.3? And if I want to suspend split horizon only for this one new host, how do I filter out the mess of regurgitated routes that B advertises when I try no ip split-horizon? Thanks much.

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  • Apache Consuming Resources

    - by Chris Edwards
    Our web server suddenly has been giving us load issues. After I restart Apache the load stays low for a few hours up to a day or so then its back up to around 3.0 until I restart Apache again. Any suggestions on tracking down what is causing this? Thanks! Chris Edwards top - 20:15:05 up 19 days, 10:59, 1 user, load average: 2.11, 2.17, 2.47 Tasks: 532 total, 6 running, 525 sleeping, 0 stopped, 1 zombie Cpu(s): 11.5%us, 0.4%sy, 0.0%ni, 88.1%id, 0.0%wa, 0.0%hi, 0.0%si, 0.0%st Mem: 32842656k total, 13185872k used, 19656784k free, 6143740k buffers Swap: 1048568k total, 0k used, 1048568k free, 3515252k cached PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND 19089 apache 20 0 1912m 1.5g 6584 R 99.6 4.9 71:01.53 /usr/sbin/httpd 21136 apache 20 0 392m 55m 5736 R 95.0 0.2 0:03.45 /usr/sbin/httpd 21139 apache 20 0 374m 38m 5808 S 40.5 0.1 0:04.91 /usr/sbin/httpd 21124 apache 20 0 389m 51m 5948 R 38.9 0.2 0:03.15 /usr/sbin/httpd 21111 apache 20 0 371m 35m 5964 S 18.8 0.1 0:01.22 /usr/sbin/httpd 21127 apache 20 0 375m 39m 5832 S 17.8 0.1 0:01.66 /usr/sbin/httpd 21128 apache 20 0 374m 38m 5792 S 16.2 0.1 0:01.56 /usr/sbin/httpd 21110 apache 20 0 374m 38m 5848 S 15.9 0.1 0:01.02 /usr/sbin/httpd 21113 apache 20 0 374m 38m 5836 S 15.9 0.1 0:02.16 /usr/sbin/httpd 21077 apache 20 0 379m 43m 6408 S 11.0 0.1 0:07.22 /usr/sbin/httpd 21101 apache 20 0 384m 49m 6988 R 5.8 0.2 0:04.47 /usr/sbin/httpd 21112 apache 20 0 374m 38m 5956 R 2.6 0.1 0:01.61 /usr/sbin/httpd

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  • Split horizon, route filtering, and having RIPv2 announce a non-attached route to host...

    - by Paul
    Routers A, B & C live at 10.1.1.1, 10.1.1.2 and 10.1.1.3 on a /24 metro Ethernet subnet. Each router also has its own private subnet on another interface. Router B's private subnet links thru a firewall to a 10.20.20.0 network at another organization. Router B redistributes to A and C several static routes for hosts on 10.20.20.0. However, a new host 10.20.20.5/32 must be reached via a different path that goes through router C. I know that C can advertise this host-based route with no problem, but I'd like to keep all my 10.20.20.x static routes in one place. So, how can B tell A via RIPv2 to send packets for 10.20.20.5/32 to C? So far it looks like I need no ip split-horizon on router B's 10.1.1.2 interface, perhaps because B has already learned from C other routes with a next hop of 10.1.1.3. But how does RIPv2 split horizon with no auto-summary and network 10.0.0.0 really work? If B learns a route to ANY 10.x.x.x network or host from A or C, is that enough for split horizon to keep it from redistributing ip route 10.20.20.5 255.255.255.255 10.1.1.3? And if I want to suspend split horizon only for this one new host, how do I filter out the mess of regurgitated routes that B advertises when I try no ip split-horizon? Thanks much.

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  • Where is my CPU usage going?

    - by Josh
    My Ubuntu 10.04 Lucid virtual machine is saying it's at 100% CPU usage... but all I'm running is Thunderbird. According to top, CPU usage should be ~25.9%... How do I interpret this conflicting output from top? top - 13:55:26 up 3:35, 4 users, load average: 3.03, 2.59, 2.48 Tasks: 178 total, 1 running, 177 sleeping, 0 stopped, 0 zombie Cpu(s): 16.0%us, 79.7%sy, 0.0%ni, 0.0%id, 0.0%wa, 1.3%hi, 3.0%si, 0.0%st Mem: 509364k total, 479108k used, 30256k free, 3092k buffers Swap: 2096440k total, 58380k used, 2038060k free, 225116k cached PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND 7708 jnet 20 0 480m 109m 17m S 18.4 22.1 21:59.14 thunderbird-bin 4615 jnet 20 0 5488 1268 1040 S 2.3 0.2 5:00.03 nx-rootless-ses 7124 jnet 20 0 56688 27m 4812 S 2.0 5.5 6:35.09 nxagent 6724 nx 20 0 9628 1400 636 S 1.6 0.3 3:26.59 sshd 30106 root 20 0 2544 1236 908 R 0.7 0.2 0:00.33 top 19 root 20 0 0 0 0 S 0.3 0.0 0:22.45 ata/0 38 root 20 0 0 0 0 S 0.3 0.0 0:05.53 scsi_eh_1 345 root 20 0 0 0 0 S 0.3 0.0 0:04.72 kjournald 1719 root 20 0 3260 1192 944 S 0.3 0.2 0:17.36 vmware-guestd 1 root 20 0 2804 1356 940 S 0.0 0.3 0:01.99 init 2 root 20 0 0 0 0 S 0.0 0.0 0:00.01 kthreadd 3 root RT 0 0 0 0 S 0.0 0.0 0:00.00 migration/0 4 root 20 0 0 0 0 S 0.0 0.0 0:00.15 ksoftirqd/0 5 root RT 0 0 0 0 S 0.0 0.0 0:00.00 watchdog/0 ... Specifically I'm referring to the fact that the CPU usage totals show 0% idle time: Cpu(s): 16.0%us, 79.7%sy, 0.0%ni, 0.0%id, 0.0%wa, 1.3%hi, 3.0%si, 0.0%st Yet when adding up the percentages in the %CPU column I get 25.9%, not 100%!

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  • No clue for high load average on top

    - by Oz.
    We have several machines on Amazon (ec2) of the type c1.xlarge with 16 cpus, running the Amazon AMI. Details on the machine: 7 GB of memory 20 EC2 Compute Units (8 virtual cores with 2.5 EC2 Compute Units each) 1690 GB of instance storage 64-bit platform I/O Performance: High API name: c1.xlarge One out of the several machines is showing a high load average, since we have run the last yum upgrade a couple of weeks a go. We did not yet update the other machines, and everything looks normal on them. The strange thing is that the top command not showing any hint for the cause of the load. CPUs are 4.8%us, 1.1%sy, 0.0%ni, 94.1%id, 0.0%wa, 0.0%hi, 0.0%si, 0.0%st(see below). Mem is about 1.5GB free. Any idea what could it be, or where else can we check? Many thanks for the help. # # top # top - 07:57:42 up 4:18, 1 user, load average: 1.36, 1.45, 1.47 Tasks: 131 total, 1 running, 130 sleeping, 0 stopped, 0 zombie Cpu(s): 4.8%us, 1.1%sy, 0.0%ni, 94.1%id, 0.0%wa, 0.0%hi, 0.0%si, 0.0%st Mem: 7120092k total, 5644920k used, 1475172k free, 532888k buffers Swap: 0k total, 0k used, 0k free, 3463936k cached PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND 1557 mysql 20 0 1829m 374m 6448 S 14.3 5.4 11:15.09 mysqld 6655 apache 20 0 416m 49m 3744 S 9.3 0.7 0:04.85 httpd 27683 apache 20 0 421m 54m 3708 S 9.0 0.8 0:00.99 httpd 6682 apache 20 0 424m 57m 3788 S 8.3 0.8 0:03.81 httpd 16816 apache 20 0 419m 51m 3760 S 4.3 0.7 0:04.09 httpd 22182 apache 20 0 417m 50m 3756 S 1.7 0.7 0:06.34 httpd 219 root 20 0 0 0 0 S 0.3 0.0 0:00.34 kworker/7:1 699 root 20 0 0 0 0 S 0.3 0.0 0:00.40 kworker/3:1 1 root 20 0 19376 1508 1212 S 0.0 0.0 0:00.29 init 2 root 20 0 0 0 0 S 0.0 0.0 0:00.00 kthreadd 3 root 20 0 0 0 0 S 0.0 0.0 0:00.71 ksoftirqd/0

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  • QMail do not delivery to remote mailboxes for my own domain

    - by lorenzo-s
    Sorry for the title, I don't know how to sum up this situation. I have a web server at mydomain.com, running qmail for website related mail delivery (i.e. newsletter, sign up confirmation, etc). qmail here is used only to send mails, because I have a fully working Google App Gmail associated with mydomain.com for normal email receiving. qmail runs fine when sending email to remote addresses, for example to [email protected], but fails when sending to [email protected]. I think it's because the server thinks that he have to manage mailboxes for mydomain.com locally, instead of redirect them to Gmail. Here is the /var/log/qmail/current for two email: the first one is sent without problems to example.com, second one fails because it's for mydomain.com: 2012-11-15 15:04:11.551933500 new msg 262580 2012-11-15 15:04:11.551936500 info msg 262580: bytes 5604 from <[email protected]> qp 5185 uid 33 2012-11-15 15:04:11.575910500 starting delivery 316: msg 262580 to remote [email protected] 2012-11-15 15:04:11.575912500 status: local 0/10 remote 1/20 2012-11-15 15:04:12.189828500 delivery 316: success: 74.125.136.27_accepted_message./Remote_host_said:_250_2.0.0_OK_1352991894_j49si13055539eep.9/ 2012-11-15 15:04:12.189830500 status: local 0/10 remote 0/20 2012-11-15 15:04:12.189831500 end msg 262580 2012-11-15 16:49:20.270332500 new msg 262580 2012-11-15 16:49:20.270336500 info msg 262580: bytes 2192 from <[email protected]> qp 5479 uid 33 2012-11-15 16:49:20.315125500 starting delivery 323: msg 262580 to local [email protected] 2012-11-15 16:49:20.315128500 status: local 1/10 remote 0/20 2012-11-15 16:49:20.320855500 delivery 323: failure: Sorry,_no_mailbox_here_by_that_name._(#5.1.1)/ 2012-11-15 16:49:20.320858500 status: local 0/10 remote 0/20 2012-11-15 16:49:20.372911500 bounce msg 262580 qp 5484 2012-11-15 16:49:20.372914500 end msg 262580 As you can see, it says: Sorry,_no_mailbox_here_by_that_name I can't say he's wrong :) How to solve this? How to let Google App Gmail manage incoming email for mydomain.com for messages sent by mydomain.com qmail server?

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  • Setting up /etc/network/interface file for KVM ubuntu 10.10

    - by Charles Thornton
    I am trying to setup KVM on Unbuntu 10.10 IFCONFIG DUMP: hydra(~}$ifconfig eth0 Link encap:Ethernet HWaddr 00:1b:fc:cb:77:eb inet addr:172.20.20.3 Bcast:172.20.20.255 Mask:255.255.255.0 inet6 addr: fe80::21b:fcff:fecb:77eb/64 Scope:Link UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 RX packets:1345 errors:0 dropped:0 overruns:0 frame:0 TX packets:1541 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:1000 RX bytes:820414 (820.4 KB) TX bytes:317708 (317.7 KB) Interrupt:23 Base address:0xc000 lo Link encap:Local Loopback inet addr:127.0.0.1 Mask:255.0.0.0 inet6 addr: ::1/128 Scope:Host UP LOOPBACK RUNNING MTU:16436 Metric:1 RX packets:8 errors:0 dropped:0 overruns:0 frame:0 TX packets:8 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:0 RX bytes:480 (480.0 B) TX bytes:480 (480.0 B) virbr0 Link encap:Ethernet HWaddr 0a:1e:fb:b4:77:84 inet addr:192.168.122.1 Bcast:192.168.122.255 Mask:255.255.255.0 inet6 addr: fe80::81e:fbff:feb4:7784/64 Scope:Link UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 RX packets:0 errors:0 dropped:0 overruns:0 frame:0 TX packets:56 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:0 RX bytes:0 (0.0 B) TX bytes:8934 (8.9 KB) hydra(~}$ QUESTION:: How should /etc/network/interfaces be setup?? The following attempt just kills my internet connection! --------- /etc/network/interfaces ------------- # This file describes the network interfaces available on your system # and how to activate them. For more information, see interfaces(5). # The loopback network interface auto lo iface lo inet loopback # The primary network interface auto eth0 iface eth0 inet manual auto br0 iface br0 inet static address 172.20.20.3 netmask 255.255.255.0 network 172.20.20.0 broadcast 172.20.20.255 gateway 172.20.20.1 bridge_ports eth0 bridge_fd 9 bridge_hello 2 bridge_maxage 12 bridge_stp off What am I doing wrong????

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  • PHP application failed to connect after a network plugged back in

    - by tntu
    My data-center appears to have had some issues with their network and thus my server has suffered from on an off network connectivity for about an hour. After the connection has been completely re-established my code still kept reporting the same issue over and over until I have restarted the service. The code is a simple PHP code that loops forever checking the Apple feed-back server and then sleeps for a few minutes and then it begins all over again. Now I understand the error being generated if the network is down but once it got back up why did it continue until I have restarted the code? Does PHP have something that needs to be re-initialized or something?? Messges log: Dec 20 08:57:22 server kernel: r8169: eth0: link down Dec 20 08:57:28 server kernel: r8169 0000:06:00.0: eth0: link up Dec 20 08:57:29 server kernel: r8169: eth0: link down Dec 20 08:57:33 server kernel: r8169 0000:06:00.0: eth0: link up Dec 20 08:57:33 server kernel: r8169: eth0: link down Dec 20 08:57:37 server kernel: r8169 0000:06:00.0: eth0: link up Dec 20 08:57:38 server kernel: r8169: eth0: link down Dec 20 08:57:44 server kernel: r8169 0000:06:00.0: eth0: link up Dec 20 08:57:44 server kernel: r8169: eth0: link down Dec 20 08:57:52 server kernel: r8169 0000:06:00.0: eth0: link up Dec 20 08:57:52 server kernel: r8169: eth0: link down Dec 20 09:10:58 server kernel: r8169 0000:06:00.0: eth0: link up PHP Error: PHP Warning: stream_socket_client(): php_network_getaddresses: getaddrinfo failed: Name or service not known in /home/push/feedback.php on line 36 Code Line 36: $apns = stream_socket_client('ssl://feedback.sandbox.push.apple.com:2196', $errcode, $errstr, 60, STREAM_CLIENT_CONNECT, $stream_context);

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  • lamp -- edit PHP file but doesn't change web output -- including die()

    - by Reid W
    Server is standard Linux server on Amazon Web Services. Cent OS 5/Apache/PHP 5.3. No APC. It's worked fine for over a year, but now when I edit some but not all PHP files on the server using vi, the changes don't affect the web output. For example, I edit myfile.php and put a die() at the top, but when I load the page in my web browser, instead of the die() I see the content that would show up if the die() weren't there. svn updating the file in question doesn't help either. Files are on an Amazon EBS partition symlinked to /var/www/html. Just to reiterate -- this has worked fine for a long time. Restarting apache didn't help, nor did rebooting the server. What's weird is that it's just some of the files but not all. File ownership/permissions are the same for the "good" and "problem" files. I'm not a Linux newbie but am at a complete loss with this, and couldn't find anything on Google either. Any hints would be much appreciated!

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  • Need help in filtering the data with various condition and filling in scroll window GP

    - by Rahul
    Hi all, I am filtering the data and displaying in scroll window. There are many combination to display this data by customer id, customer id and itemnumber, customer id, itemnumber, work and history condition. And from date and To date condition. My query is when I am selecting the customer id and work or history table it should display the corresponding data. Like select * from price history where customerid=’custid’ and name=’Work’. It should display in scroll only these values none other it the same way history condition should work. Work and History are in check box. In my case whatever range I am selecting whether Work and History always loading with entire data, so it’s not filtering properly. My second problem is if I select from date and keep empty to date …in this case all the data should display from selected from date to end of table data. But I am not getting….pls somebody help me here is my entire coding: if empty('Customer Number') then warning "Select Customer ID"; focus 'Customer Number'; abort script; end if; if '(L) RadioGroup4' of window Window1 of form 'Customer Pricing Inquiry'=1 then if empty(Date) then abort script; focus Date; end if; end if; if not empty('(L) Date') then if '(L) Date' {if not empty(Date) and empty('(L) Date') then warning"Please enter To Date"; focus field '(L) Date'; abort script; end if;} range clear table Display_Pricing_Temp; clear field 'Customer Number' of table Display_Pricing_Temp; range start table Display_Pricing_Temp; fill field 'Customer Number' of table Display_Pricing_Temp; range end table Display_Pricing_Temp; remove range table Display_Pricing_Temp; range clear table Display_Pricing; if '(L) Checkbox0' =true and '(L) Checkbox2'=true and empty('Item Code' of window Window1 of form 'Customer Pricing Inquiry') and str(Date of window Window1 of form 'Customer Pricing Inquiry')="0/0/0000" then {range clear table Display_Pricing;} range table Display_Pricing where physicalname('Customer Number' of table Display_Pricing) + "= '" + str('Customer Number' of window Window1) + "' and ("+ physicalname(Name of table Display_Pricing)+ "='History' or "+ physicalname(Name of table Display_Pricing)+ "='Work')"; {range clear table Display_Pricing;} end if; if '(L) Checkbox0' =true or '(L) Checkbox2'=true then {{Only Item No is there} if not empty('Item Code') and '(L) Checkbox0' =false and '(L) Checkbox2'=false and str('(L) Date')="0/0/0000" then range table Display_Pricing where physicalname('Customer Number' of table Display_Pricing) + "= '" + str('Customer Number' of window Window1) + "' and "+ physicalname('Item Number' of table Display_Pricing)+ "='"+ str('Item Code')+"'"; end if; } if empty('(L) Date') and not empty(Date) then {date work hist item} if not empty('Item Code') and '(L) Checkbox0' =true and '(L) Checkbox2'=true and str(Date)<"0/0/0000" then range clear table Display_Pricing; range table Display_Pricing where physicalname('Customer Number' of table Display_Pricing) + "= '" + str('Customer Number' of window Window1) + "' and "+ physicalname('Item Number' of table Display_Pricing)+ "='"+ str('Item Code')+"' and ("+ physicalname(Name of table Display_Pricing)+ "='Work' or " +physicalname(Name of table Display_Pricing)+ "='History')and convert(datetime,convert(varchar(20)," +physicalname(Date of table Display_Pricing)+"),102) convert(datetime,convert(varchar(20),'"+ str(Date of window Window1 of form 'Customer Pricing Inquiry')+ "'),102)" ; range clear table Display_Pricing; end if; {date work hist } if empty('Item Code') and '(L) Checkbox0' =true and '(L) Checkbox2'=true and str(Date)<"0/0/0000" then range clear table Display_Pricing; range table Display_Pricing where physicalname('Customer Number' of table Display_Pricing) + "= '" + str('Customer Number' of window Window1) + "' and ("+ physicalname(Name of table Display_Pricing)+ "='Work' or " +physicalname(Name of table Display_Pricing)+ "='History')and convert(datetime,convert(varchar(20)," +physicalname(Date of table Display_Pricing)+"),102) convert(datetime,convert(varchar(20),'"+ str(Date of window Window1 of form 'Customer Pricing Inquiry')+ "'),102)" ; range clear table Display_Pricing; end if; {date,work,item code} if not empty('Item Code') and '(L) Checkbox0' =true and '(L) Checkbox2'=false and str(Date)<"0/0/0000" then range clear table Display_Pricing; range table Display_Pricing where physicalname('Customer Number' of table Display_Pricing) + "= '" + str('Customer Number' of window Window1) + "' and "+ physicalname('Item Number' of table Display_Pricing)+ "='"+ str('Item Code')+"' and "+ physicalname(Name of table Display_Pricing)+ "='Work' and convert(datetime,convert(varchar(20)," +physicalname(Date of table Display_Pricing)+"),102) convert(datetime,convert(varchar(20),'"+ str(Date of window Window1 of form 'Customer Pricing Inquiry')+ "'),102)" ; range clear table Display_Pricing; end if; {date history item code} if not empty('Item Code') and '(L) Checkbox0' =false and '(L) Checkbox2'=true and str(Date)<"0/0/0000" then range clear table Display_Pricing; range table Display_Pricing where physicalname('Customer Number' of table Display_Pricing) + "= '" + str('Customer Number' of window Window1) + "' and "+ physicalname('Item Number' of table Display_Pricing)+ "='"+ str('Item Code')+"' and "+ physicalname(Name of table Display_Pricing)+ "='History' and convert(datetime,convert(varchar(20)," +physicalname(Date of table Display_Pricing)+"),102) convert(datetime,convert(varchar(20),'"+ str(Date of window Window1 of form 'Customer Pricing Inquiry')+ "'),102)" ; range clear table Display_Pricing; end if; {date,work} if empty('Item Code') and '(L) Checkbox0' =true and '(L) Checkbox2'=false and not empty(Date) then range clear table Display_Pricing; range table Display_Pricing where physicalname('Customer Number' of table Display_Pricing) + "= '" + str('Customer Number' of window Window1) + "' and "+ physicalname(Name of table Display_Pricing)+ "='Work' and convert(datetime,convert(varchar(20)," +physicalname(Date of table Display_Pricing)+"),102) convert(datetime,convert(varchar(20),'"+ str(Date of window Window1 of form 'Customer Pricing Inquiry')+ "'),102) "; range clear table Display_Pricing; end if; {date history } if empty('Item Code') and '(L) Checkbox0' =false and '(L) Checkbox2'=true and str(Date)<"0/0/0000" then range clear table Display_Pricing; range table Display_Pricing where physicalname('Customer Number' of table Display_Pricing) + "= '" + str('Customer Number' of window Window1) + "' and "+ physicalname(Name of table Display_Pricing)+ "='History' and convert(datetime,convert(varchar(20)," +physicalname(Date of table Display_Pricing)+"),102) convert(datetime,convert(varchar(20),'"+ str(Date of window Window1 of form 'Customer Pricing Inquiry')+ "'),102)" ; range clear table Display_Pricing; end if; end if; if not empty('(L) Date') and not empty(Date) then {Only Item No is there and work} if not empty('Item Code') and '(L) Checkbox0' =true and '(L) Checkbox2'=false and str(Date)="0/0/0000" then range clear table Display_Pricing; range table Display_Pricing where physicalname('Customer Number' of table Display_Pricing) + "= '" + str('Customer Number' of window Window1) + "' and "+ physicalname('Item Number' of table Display_Pricing)+ "='"+ str('Item Code')+"' and "+ physicalname(Name of table Display_Pricing)+ "='Work'"; range clear table Display_Pricing; end if; if not empty('Item Code') and '(L) Checkbox0' =true and '(L) Checkbox2'=true and str(Date)="0/0/0000" then range clear table Display_Pricing; range table Display_Pricing where physicalname('Customer Number' of table Display_Pricing) + "= '" + str('Customer Number' of window Window1) + "' and "+ physicalname('Item Number' of table Display_Pricing)+ "='"+ str('Item Code')+"' and ("+ physicalname(Name of table Display_Pricing)+ "='Work' or " +physicalname(Name of table Display_Pricing)+ "='History')"; range clear table Display_Pricing; end if; {date work hist item} if not empty('Item Code') and '(L) Checkbox0' =true and '(L) Checkbox2'=true and str(Date)<"0/0/0000" then range clear table Display_Pricing; range table Display_Pricing where physicalname('Customer Number' of table Display_Pricing) + "= '" + str('Customer Number' of window Window1) + "' and "+ physicalname('Item Number' of table Display_Pricing)+ "='"+ str('Item Code')+"' and ("+ physicalname(Name of table Display_Pricing)+ "='Work' or " +physicalname(Name of table Display_Pricing)+ "='History')and convert(datetime,convert(varchar(20)," +physicalname(Date of table Display_Pricing)+"),102) between convert(datetime,convert(varchar(20),'"+ str(Date of window Window1 of form 'Customer Pricing Inquiry')+ "'),102) and convert(datetime,convert(varchar(20),'"+ str('(L) Date' of window Window1 of form 'Customer Pricing Inquiry') +"'),102)"; range clear table Display_Pricing; end if; {date work hist } if empty('Item Code') and '(L) Checkbox0' =true and '(L) Checkbox2'=true and str(Date)<"0/0/0000" then range clear table Display_Pricing; range table Display_Pricing where physicalname('Customer Number' of table Display_Pricing) + "= '" + str('Customer Number' of window Window1) + "' and ("+ physicalname(Name of table Display_Pricing)+ "='Work' or " +physicalname(Name of table Display_Pricing)+ "='History')and convert(datetime,convert(varchar(20)," +physicalname(Date of table Display_Pricing)+"),102) between convert(datetime,convert(varchar(20),'"+ str(Date of window Window1 of form 'Customer Pricing Inquiry')+ "'),102) and convert(datetime,convert(varchar(20),'"+ str('(L) Date' of window Window1 of form 'Customer Pricing Inquiry') +"'),102)"; range clear table Display_Pricing; end if; {date,work,item code} if not empty('Item Code') and '(L) Checkbox0' =true and '(L) Checkbox2'=false and str(Date)<"0/0/0000" then range clear table Display_Pricing; range table Display_Pricing where physicalname('Customer Number' of table Display_Pricing) + "= '" + str('Customer Number' of window Window1) + "' and "+ physicalname('Item Number' of table Display_Pricing)+ "='"+ str('Item Code')+"' and "+ physicalname(Name of table Display_Pricing)+ "='Work' and convert(datetime,convert(varchar(20)," +physicalname(Date of table Display_Pricing)+"),102) between convert(datetime,convert(varchar(20),'"+ str(Date of window Window1 of form 'Customer Pricing Inquiry')+ "'),102) and convert(datetime,convert(varchar(20),'"+ str('(L) Date' of window Window1 of form 'Customer Pricing Inquiry') +"'),102)"; range clear table Display_Pricing; end if; {date history item code} if not empty('Item Code') and '(L) Checkbox0' =false and '(L) Checkbox2'=true and str(Date)<"0/0/0000" then range clear table Display_Pricing; range table Display_Pricing where physicalname('Customer Number' of table Display_Pricing) + "= '" + str('Customer Number' of window Window1) + "' and "+ physicalname('Item Number' of table Display_Pricing)+ "='"+ str('Item Code')+"' and "+ physicalname(Name of table Display_Pricing)+ "='History' and convert(datetime,convert(varchar(20)," +physicalname(Date of table Display_Pricing)+"),102) between convert(datetime,convert(varchar(20),'"+ str(Date of window Window1 of form 'Customer Pricing Inquiry')+ "'),102) and convert(datetime,convert(varchar(20),'"+ str('(L) Date' of window Window1 of form 'Customer Pricing Inquiry') +"'),102)"; range clear table Display_Pricing; end if; {date work} {date,work} if empty('Item Code') and '(L) Checkbox0' =true and '(L) Checkbox2'=false and not empty(Date) then range clear table Display_Pricing; range table Display_Pricing where physicalname('Customer Number' of table Display_Pricing) + "= '" + str('Customer Number' of window Window1) + "' and "+ physicalname(Name of table Display_Pricing)+ "='Work' and convert(datetime,convert(varchar(20)," +physicalname(Date of table Display_Pricing)+"),102) between convert(datetime,convert(varchar(20),'"+ str(Date of window Window1 of form 'Customer Pricing Inquiry')+ "'),102) and convert(datetime,convert(varchar(20),'"+ str('(L) Date' of window Window1 of form 'Customer Pricing Inquiry') +"'),102)"; range clear table Display_Pricing; end if; {date history } if empty('Item Code') and '(L) Checkbox0' =false and '(L) Checkbox2'=true and str(Date)<"0/0/0000" then range clear table Display_Pricing; range table Display_Pricing where physicalname('Customer Number' of table Display_Pricing) + "= '" + str('Customer Number' of window Window1) + "' and "+ physicalname(Name of table Display_Pricing)+ "='History' and convert(datetime,convert(varchar(20)," +physicalname(Date of table Display_Pricing)+"),102) between convert(datetime,convert(varchar(20),'"+ str(Date of window Window1 of form 'Customer Pricing Inquiry')+ "'),102) and convert(datetime,convert(varchar(20),'"+ str('(L) Date' of window Window1 of form 'Customer Pricing Inquiry') +"'),102)"; range clear table Display_Pricing; end if; end if; {Only Item No is there and hist} if not empty('Item Code') and '(L) Checkbox0' =false and '(L) Checkbox2'=true and str(Date)="0/0/0000" then range clear table Display_Pricing; range table Display_Pricing where physicalname('Customer Number' of table Display_Pricing) + "= '" + str('Customer Number' of window Window1) + "' and "+ physicalname('Item Number' of table Display_Pricing)+ "='"+ str('Item Code')+"' and "+ physicalname(Name of table Display_Pricing)+ "='History'"; range clear table Display_Pricing; end if; {for only work table } if empty('Item Code') and '(L) Checkbox0' =true and '(L) Checkbox2'=false and str(Date)="0/0/0000" then range clear table Display_Pricing; range table Display_Pricing where physicalname('Customer Number' of table Display_Pricing) + "= '" + str('Customer Number' of window Window1) + "' and "+ physicalname(Name of table Display_Pricing)+ "='Work'"; range clear table Display_Pricing; end if; {for only hist table } if empty('Item Code') and '(L) Checkbox0' =false and '(L) Checkbox2'=true and str(Date)="0/0/0000" then range clear table Display_Pricing; range table Display_Pricing where physicalname('Customer Number' of table Display_Pricing) + "= '" + str('Customer Number' of window Window1) + "' and "+ physicalname(Name of table Display_Pricing)+ "='History'"; range clear table Display_Pricing; end if; get first table Display_Pricing; if err() = OKAY then repeat copy from table Display_Pricing to table Display_Pricing_Temp; save table Display_Pricing_Temp; get next table Display_Pricing; until err() = EOF; else clear window Price_Scroll of form 'Customer Pricing Inquiry'; end if; else clear window Price_Scroll of form 'Customer Pricing Inquiry'; end if; fill window Price_Scroll table Display_Pricing_Temp by number 1;

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  • Linux server apache httpd processes take i/o wait to close to 100% and lock down server

    - by user3682065
    For about 5 days now, and seemingly out of the blue, my linux server has started locking up from time to time. The pattern is always the same as far as I can tell from top and iotop commands around the time it starts happening: One or more httpd processes (usually one) hang and start using up 100% of CPU power, the %wa goes close to 100% and in the iotop I see several httpd processes with 99.99% in the IO column. I'm also running an SVN server on this machine through apache and the one way that I've been consistently able to reproduce this is to do an SVN commit of new files or an SVN update from the repository on this server (I am the only one using this SVN repository). This will always reproduce this scenario successfully, but until very recently I had no problems at all checking in/out of SVN. But sometimes it just happens for no detectable reason at all it seems. So it seems like there is some issue with my Apache that leads it to have processes use up a lot of read/write upon certain triggers. I was wondering if anyone could help me uncover that issue. EDIT: OK now it's happening again: This is top: [root@server ~]# top top - 10:56:54 up 2:59, 5 users, load average: 171.46, 70.35, 27.01 Tasks: 328 total, 2 running, 326 sleeping, 0 stopped, 0 zombie Cpu(s): 1.9%us, 2.0%sy, 0.0%ni, 0.0%id, 96.1%wa, 0.0%hi, 0.0%si, 0.0%st Mem: 2021144k total, 1968192k used, 52952k free, 2500k buffers Swap: 4194288k total, 2938584k used, 1255704k free, 39008k cached PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND 10390 apache 20 0 2774m 936m 6200 D 2.0 47.4 1:52.27 httpd 2149 root 20 0 927m 13m 1040 S 0.7 0.7 1:50.46 namecoind 11 root 20 0 0 0 0 R 0.3 0.0 0:30.10 events/0 23 root 20 0 0 0 0 S 0.3 0.0 0:17.88 kblockd/1 2049 root 20 0 382m 4932 2880 D 0.3 0.2 0:03.67 httpd 2144 root 20 0 1702m 69m 1164 S 0.3 3.5 5:19.68 bitcoind 6325 root 20 0 15164 1100 656 R 0.3 0.1 0:11.09 top 10311 apache 20 0 387m 9496 7320 D 0.3 0.5 0:01.89 httpd 10313 apache 20 0 391m 10m 7364 D 0.3 0.5 0:02.40 httpd 10466 apache 20 0 399m 12m 7392 D 0.3 0.7 0:02.41 httpd 10599 apache 20 0 391m 9324 7340 D 0.3 0.5 0:00.15 httpd 10628 apache 20 0 384m 7620 4052 D 0.3 0.4 0:00.01 httpd 10633 apache 20 0 384m 7048 3504 D 0.3 0.3 0:00.01 httpd 10634 apache 20 0 384m 8012 4048 D 0.3 0.4 0:00.02 httpd 10638 apache 20 0 400m 22m 9.8m D 0.3 1.1 0:01.93 httpd 10640 apache 20 0 385m 8288 4028 D 0.3 0.4 0:00.03 httpd 10641 apache 20 0 401m 21m 6376 D 0.3 1.1 0:01.45 httpd 10759 apache 20 0 385m 8816 3480 D 0.3 0.4 0:01.45 httpd 10773 apache 20 0 384m 8044 3464 D 0.3 0.4 0:00.02 httpd This is an iotop snapshot: Total DISK READ: 5.93 M/s | Total DISK WRITE: 0.00 B/s TID PRIO USER DISK READ DISK WRITE SWAPIN IO> COMMAND 10732 be/4 apache 3.76 K/s 0.00 B/s 0.00 % 58.48 % httpd 876 be/3 root 0.00 B/s 52.68 K/s 0.00 % 52.98 % [jbd2/dm-1-8] 10906 be/4 root 124.17 K/s 0.00 B/s 0.00 % 23.03 % sh -c [ -x /usr/local/psa/admin/sbin/backupmng ] && /usr/local/psa/admin/sbin/backupmng >/dev/null 2>&1 2156 be/4 root 206.94 K/s 0.00 B/s 0.00 % 21.15 % bitcoind 10904 be/4 mysql 0.00 B/s 0.00 B/s 0.00 % 18.94 % mysqld --basedir=/usr --datadir=/var/lib/mysql --user=mysql --log-error=/var/log/mysqld.log --pid-file=/var/run/mysqld/mysqld.pid --socket=/var/lib/mysql/mysql.sock 10773 be/4 apache 7.53 K/s 0.00 B/s 0.00 % 14.77 % httpd 10641 be/4 apache 15.05 K/s 0.00 B/s 0.00 % 11.57 % httpd 10399 be/4 apache 1057.29 K/s 0.00 B/s 43.16 % 10.56 % httpd 10682 be/4 sw-cp-se 158.03 K/s 0.00 B/s 0.00 % 7.45 % sw-engine-cgi -c /usr/local/psa/admin/conf/php.ini -d auto_prepend_file=auth.php3 -u psaadm 10774 be/4 apache 3.76 K/s 0.00 B/s 0.00 % 6.53 % httpd 10624 be/4 apache 0.00 B/s 0.00 B/s 0.00 % 5.53 % httpd 10356 be/4 apache 899.26 K/s 0.00 B/s 35.52 % 4.01 % httpd 10795 be/4 apache 0.00 B/s 0.00 B/s 0.00 % 3.93 % httpd 10804 be/4 apache 7.53 K/s 0.00 B/s 0.00 % 3.08 % httpd 4379 be/4 root 2.89 M/s 0.00 B/s 99.99 % 0.00 % namecoind 10619 be/4 apache 462.80 K/s 0.00 B/s 7.80 % 0.00 % httpd 10636 be/4 apache 3.76 K/s 0.00 B/s 0.00 % 0.00 % httpd 10716 be/4 mysql 105.35 K/s 0.00 B/s 5.92 % 0.00 % mysqld --basedir=/usr --datadir=/var/lib/mysql --user=mysql --log-error=/var/log/mysqld.log --pid-file=/var/run/mysqld/mysqld.pid --socket=/var/lib/mysql/mysql.sock 1988 be/4 root 18.81 K/s 0.00 B/s 0.00 % 0.00 % spamd_full.sock I also ran lsof -p for pid 10390 which was way up top under the top command and this is the bottom line where I can sort of see what request this was and it says CLOSE_WAIT: httpd 10390 apache 34u IPv6 315879 0t0 TCP default-domain.com:https->crawl-66-249-65-91.googlebot.com:42907 (CLOSE_WAIT) I'm still not sure what exactly is causing this all to happen though? I killed that service but %wa and load average remain high, I also stopped mysqld and other services. It really only goes down once I stop httpd altogether, and even then I can't start it without finding remaining hanging httpd processes via "netstat -tulpn", killing those or doing "killall -9 httpd" and after waiting a while for it to cycle through all those then doing /etc/init.d/httpd start

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  • l2tp / ipsec debian Openswan U2.6.38 does not connect

    - by locojay
    i am trying to get ipsec/l2tp running on a debian server with an iphone as a client but always get: Dec 2 21:00:04 vpn pluto[22711]: packet from <clientip>:43598: received Vendor ID payload [RFC 3947] method set to=115 Dec 2 21:00:04 vpn pluto[22711]: packet from <clientip>:43598: received Vendor ID payload [draft-ietf-ipsec-nat-t-ike] meth=114, but already using method 115 Dec 2 21:00:04 vpn pluto[22711]: packet from <clientip>:43598: received Vendor ID payload [draft-ietf-ipsec-nat-t-ike-08] meth=113, but already using method 115 Dec 2 21:00:04 vpn pluto[22711]: packet from <clientip>:43598: received Vendor ID payload [draft-ietf-ipsec-nat-t-ike-07] meth=112, but already using method 115 Dec 2 21:00:04 vpn pluto[22711]: packet from <clientip>:43598: received Vendor ID payload [draft-ietf-ipsec-nat-t-ike-06] meth=111, but already using method 115 Dec 2 21:00:04 vpn pluto[22711]: packet from <clientip>:43598: received Vendor ID payload [draft-ietf-ipsec-nat-t-ike-05] meth=110, but already using method 115 Dec 2 21:00:04 vpn pluto[22711]: packet from <clientip>:43598: received Vendor ID payload [draft-ietf-ipsec-nat-t-ike-04] meth=109, but already using method 115 Dec 2 21:00:04 vpn pluto[22711]: packet from <clientip>:43598: received Vendor ID payload [draft-ietf-ipsec-nat-t-ike-03] meth=108, but already using method 115 Dec 2 21:00:04 vpn pluto[22711]: packet from <clientip>:43598: received Vendor ID payload [draft-ietf-ipsec-nat-t-ike-02] meth=107, but already using method 115 Dec 2 21:00:04 vpn pluto[22711]: packet from <clientip>:43598: received Vendor ID payload [draft-ietf-ipsec-nat-t-ike-02_n] meth=106, but already using method 115 Dec 2 21:00:04 vpn pluto[22711]: packet from <clientip>:43598: ignoring Vendor ID payload [FRAGMENTATION 80000000] Dec 2 21:00:04 vpn pluto[22711]: packet from <clientip>:43598: received Vendor ID payload [Dead Peer Detection] Dec 2 21:00:04 vpn pluto[22711]: "L2TP-PSK-noNAT"[4] <clientip> #20: responding to Main Mode from unknown peer <clientip> Dec 2 21:00:04 vpn pluto[22711]: "L2TP-PSK-noNAT"[4] <clientip> #20: transition from state STATE_MAIN_R0 to state STATE_MAIN_R1 Dec 2 21:00:04 vpn pluto[22711]: "L2TP-PSK-noNAT"[4] <clientip> #20: STATE_MAIN_R1: sent MR1, expecting MI2 Dec 2 21:00:04 vpn pluto[22711]: "L2TP-PSK-noNAT"[4] <clientip> #20: NAT-Traversal: Result using draft-ietf-ipsec-nat-t-ike (MacOS X): both are NATed Dec 2 21:00:04 vpn pluto[22711]: "L2TP-PSK-noNAT"[4] <clientip> #20: transition from state STATE_MAIN_R1 to state STATE_MAIN_R2 Dec 2 21:00:04 vpn pluto[22711]: "L2TP-PSK-noNAT"[4] <clientip> #20: STATE_MAIN_R2: sent MR2, expecting MI3 Dec 2 21:00:04 vpn pluto[22711]: "L2TP-PSK-noNAT"[4] <clientip> #20: ignoring informational payload, type IPSEC_INITIAL_CONTACT msgid=00000000 Dec 2 21:00:04 vpn pluto[22711]: "L2TP-PSK-noNAT"[4] <clientip> #20: Main mode peer ID is ID_IPV4_ADDR: '10.2.210.176' Dec 2 21:00:04 vpn pluto[22711]: "L2TP-PSK-noNAT"[4] <clientip> #20: switched from "L2TP-PSK-noNAT" to "L2TP-PSK-noNAT" Dec 2 21:00:04 vpn pluto[22711]: "L2TP-PSK-noNAT"[5] <clientip> #20: deleting connection "L2TP-PSK-noNAT" instance with peer <clientip> {isakmp=#0/ipsec=#0} Dec 2 21:00:04 vpn pluto[22711]: "L2TP-PSK-noNAT"[5] <clientip> #20: transition from state STATE_MAIN_R2 to state STATE_MAIN_R3 Dec 2 21:00:04 vpn pluto[22711]: "L2TP-PSK-noNAT"[5] <clientip> #20: new NAT mapping for #20, was <clientip>:43598, now <clientip>:49826 Dec 2 21:00:04 vpn pluto[22711]: "L2TP-PSK-noNAT"[5] <clientip> #20: STATE_MAIN_R3: sent MR3, ISAKMP SA established {auth=OAKLEY_PRESHARED_KEY cipher=aes_256 prf=oakley_sha group=modp1024} Dec 2 21:00:04 vpn pluto[22711]: "L2TP-PSK-noNAT"[5] <clientip> #20: Dead Peer Detection (RFC 3706): enabled Dec 2 21:00:05 vpn pluto[22711]: "L2TP-PSK-noNAT"[5] <clientip> #20: the peer proposed: <public ip>/32:17/1701 -> 10.2.210.176/32:17/0 Dec 2 21:00:05 vpn pluto[22711]: "L2TP-PSK-noNAT"[5] <clientip> #20: NAT-Traversal: received 2 NAT-OA. using first, ignoring others Dec 2 21:00:05 vpn pluto[22711]: "L2TP-PSK-noNAT"[5] <clientip> #21: responding to Quick Mode proposal {msgid:311d3282} Dec 2 21:00:05 vpn pluto[22711]: "L2TP-PSK-noNAT"[5] <clientip> #21: us: 171.138.2.13<171.138.2.13>:17/1701 Dec 2 21:00:05 vpn pluto[22711]: "L2TP-PSK-noNAT"[5] <clientip> #21: them: <clientip>[10.2.210.176]:17/61719 Dec 2 21:00:05 vpn pluto[22711]: "L2TP-PSK-noNAT"[5] <clientip> #21: transition from state STATE_QUICK_R0 to state STATE_QUICK_R1 Dec 2 21:00:05 vpn pluto[22711]: "L2TP-PSK-noNAT"[5] <clientip> #21: STATE_QUICK_R1: sent QR1, inbound IPsec SA installed, expecting QI2 Dec 2 21:00:05 vpn pluto[22711]: "L2TP-PSK-noNAT"[5] <clientip> #21: Dead Peer Detection (RFC 3706): enabled Dec 2 21:00:05 vpn pluto[22711]: "L2TP-PSK-noNAT"[5] <clientip> #21: transition from state STATE_QUICK_R1 to state STATE_QUICK_R2 Dec 2 21:00:05 vpn pluto[22711]: "L2TP-PSK-noNAT"[5] <clientip> #21: STATE_QUICK_R2: IPsec SA established transport mode {ESP=>0x05e23c9a <0x216077a9 xfrm=AES_256-HMAC_SHA1 NATOA=10.2.210.176 NATD=<clientip>:49826 DPD=enabled} Dec 2 21:00:26 vpn pluto[22711]: "L2TP-PSK-noNAT"[5] <clientip> #20: received Delete SA(0x05e23c9a) payload: deleting IPSEC State #21 Dec 2 21:00:26 vpn pluto[22711]: "L2TP-PSK-noNAT"[5] <clientip> #20: received and ignored informational message Dec 2 21:00:27 vpn pluto[22711]: "L2TP-PSK-noNAT"[5] <clientip> #20: received Delete SA payload: deleting ISAKMP State #20 Dec 2 21:00:27 vpn pluto[22711]: "L2TP-PSK-noNAT"[5] <clientip>: deleting connection "L2TP-PSK-noNAT" instance with peer <clientip> {isakmp=#0/ipsec=#0} Dec 2 21:00:27 vpn pluto[22711]: packet from <clientip>:49826: received and ignored informational message Dec 2 21:00:27 vpn pluto[22711]: ERROR: asynchronous network error report on eth0 (sport=4500) for message to <clientip> port 49826, complainant <clientip>: Connection refused [errno 111, origin ICMP type 3 code 3 (not authenticated)] my setup looks like this verizon fios actiontec -- DMZ-- ddwrt router -- debian xen instance actiontec : 192.168.1.1 ddwrt: 171.138.2.1 debian xen server: 171.138.2.13 forwarded udp 500, 4500, 1701 on ddwrt to debian xen instance. vpn passthrough is enabled /etc/ipsec.conf config setup dumpdir=/var/run/pluto/ nat_traversal=yes virtual_private=%v4:10.0.0.0/8,%v4:192.168.0.0/16,%v4:172.16.0.0/12,%v4:25.0.0.0/8,%v6:fd00::/8,%v6:fe80::/10,%v4:!171.138.2.0/24,%v4:!192.168.1.0/24 protostack=netkey # Add connections here conn L2TP-PSK-NAT rightsubnet=vhost:%priv also=L2TP-PSK-noNAT conn L2TP-PSK-noNAT authby=secret pfs=no auto=add keyingtries=3 # we cannot rekey for %any, let client rekey rekey=no # Apple iOS doesn't send delete notify so we need dead peer detection # to detect vanishing clients dpddelay=30 dpdtimeout=120 dpdaction=clear # Set ikelifetime and keylife to same defaults windows has ikelifetime=8h keylife=1h # l2tp-over-ipsec is transport mode type=transport # left=171.138.2.13 # # For updated Windows 2000/XP clients, # to support old clients as well, use leftprotoport=17/%any leftprotoport=17/1701 # # The remote user. # right=%any # Using the magic port of "%any" means "any one single port". This is # a work around required for Apple OSX clients that use a randomly # high port. rightprotoport=17/%any #force all to be nat'ed. because of ios conn passthrough-for-non-l2tp type=passthrough left=171.138.2.13 leftnexthop=171.138.2.1 right=0.0.0.0 rightsubnet=0.0.0.0/0 auto=route /etc/xl2tp/xl2tp.conf [global] ipsec saref = no listen-addr = 171.138.2.13 ;port = 1701 ;debug network = yes ;debug tunnel = yes ;debug network = yes ;debug packet = yes [lns default] ip range = 171.138.2.231-171.138.2.239 local ip = 171.138.2.13 assign ip = yes require chap = no refuse pap = no require authentication = no ;name = OpenswanVPN ppp debug = yes pppoptfile = /etc/ppp/options.xlt2tpd lenght bit = yes /etc/ppp/options.xl2tpd ;require-mschap-v2 pcp-accept-local ipcp-accept-local ipcp-accept-remote ;ms-dns 171.138.2.1 ms-dns 192.168.1.1 ms-dns 8.8.8.8 name l2tpd noccp auth crtscts idle 1800 mtu 1410 mru 1410 lock proxyarp connect-delay 5000 debug dump logfd 2 logfile /var/log/xl2tpd.log ipsec verify Checking your system to see if IPsec got installed and started correctly: Version check and ipsec on-path [OK] Linux Openswan U2.6.38/K3.0.0-1-amd64 (netkey) Checking for IPsec support in kernel [OK] SAref kernel support [N/A] NETKEY: Testing XFRM related proc values [OK] [OK] [OK] Checking that pluto is running [OK] Pluto listening for IKE on udp 500 [OK] Pluto listening for NAT-T on udp 4500 [OK] Two or more interfaces found, checking IP forwarding [FAILED] Checking NAT and MASQUERADEing [OK] Checking for 'ip' command [OK] Checking /bin/sh is not /bin/dash [WARNING] Checking for 'iptables' command [OK] Opportunistic Encryption Support [DISABLED] The failed can be ignored i guess since cat /proc/sys/net/ipv4/ip_forward returns 1 any help would be much appreciated as i don't have any idea why this is not working

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  • Is it possible (and safe/reliable/non-damaging) to use a 20-pin ATX PSU with a 24-pin ATX motherboar

    - by Legooolas
    I have a reasonably-decent old 20-pin PSU which I want to use on a newer 24-pin ATX motherboard. I see that the ATX page on wikipedia mentions that 24-pin ATX is backward-compatible, and I can find 20-to-24 pin adapters to buy for a couple of dollars/pounds at lots of places, but I can't find any mention of restrictions on the use of these. Will this work on any motherboard, or is it a per-motherboard compatibility question? Are there any other restrictions like the level of power available (and hence the additional 4 pins with +12, +5 and +3.3V lines which are already on other pins)?

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  • Troubleshooting latency spikes on ESXi NFS datastores

    - by exo_cw
    I'm experiencing fsync latencies of around five seconds on NFS datastores in ESXi, triggered by certain VMs. I suspect this might be caused by VMs using NCQ/TCQ, as this does not happen with virtual IDE drives. This can be reproduced using fsync-tester (by Ted Ts'o) and ioping. For example using a Grml live system with a 8GB disk: Linux 2.6.33-grml64: root@dynip211 /mnt/sda # ./fsync-tester fsync time: 5.0391 fsync time: 5.0438 fsync time: 5.0300 fsync time: 0.0231 fsync time: 0.0243 fsync time: 5.0382 fsync time: 5.0400 [... goes on like this ...] That is 5 seconds, not milliseconds. This is even creating IO-latencies on a different VM running on the same host and datastore: root@grml /mnt/sda/ioping-0.5 # ./ioping -i 0.3 -p 20 . 4096 bytes from . (reiserfs /dev/sda): request=1 time=7.2 ms 4096 bytes from . (reiserfs /dev/sda): request=2 time=0.9 ms 4096 bytes from . (reiserfs /dev/sda): request=3 time=0.9 ms 4096 bytes from . (reiserfs /dev/sda): request=4 time=0.9 ms 4096 bytes from . (reiserfs /dev/sda): request=5 time=4809.0 ms 4096 bytes from . (reiserfs /dev/sda): request=6 time=1.0 ms 4096 bytes from . (reiserfs /dev/sda): request=7 time=1.2 ms 4096 bytes from . (reiserfs /dev/sda): request=8 time=1.1 ms 4096 bytes from . (reiserfs /dev/sda): request=9 time=1.3 ms 4096 bytes from . (reiserfs /dev/sda): request=10 time=1.2 ms 4096 bytes from . (reiserfs /dev/sda): request=11 time=1.0 ms 4096 bytes from . (reiserfs /dev/sda): request=12 time=4950.0 ms When I move the first VM to local storage it looks perfectly normal: root@dynip211 /mnt/sda # ./fsync-tester fsync time: 0.0191 fsync time: 0.0201 fsync time: 0.0203 fsync time: 0.0206 fsync time: 0.0192 fsync time: 0.0231 fsync time: 0.0201 [... tried that for one hour: no spike ...] Things I've tried that made no difference: Tested several ESXi Builds: 381591, 348481, 260247 Tested on different hardware, different Intel and AMD boxes Tested with different NFS servers, all show the same behavior: OpenIndiana b147 (ZFS sync always or disabled: no difference) OpenIndiana b148 (ZFS sync always or disabled: no difference) Linux 2.6.32 (sync or async: no difference) It makes no difference if the NFS server is on the same machine (as a virtual storage appliance) or on a different host Guest OS tested, showing problems: Windows 7 64 Bit (using CrystalDiskMark, latency spikes happen mostly during preparing phase) Linux 2.6.32 (fsync-tester + ioping) Linux 2.6.38 (fsync-tester + ioping) I could not reproduce this problem on Linux 2.6.18 VMs. Another workaround is to use virtual IDE disks (vs SCSI/SAS), but that is limiting performance and the number of drives per VM. Update 2011-06-30: The latency spikes seem to happen more often if the application writes in multiple small blocks before fsync. For example fsync-tester does this (strace output): pwrite(3, "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa"..., 1048576, 0) = 1048576 fsync(3) = 0 ioping does this while preparing the file: [lots of pwrites] pwrite(3, "********************************"..., 4096, 1036288) = 4096 pwrite(3, "********************************"..., 4096, 1040384) = 4096 pwrite(3, "********************************"..., 4096, 1044480) = 4096 fsync(3) = 0 The setup phase of ioping almost always hangs, while fsync-tester sometimes works fine. Is someone capable of updating fsync-tester to write multiple small blocks? My C skills suck ;) Update 2011-07-02: This problem does not occur with iSCSI. I tried this with the OpenIndiana COMSTAR iSCSI server. But iSCSI does not give you easy access to the VMDK files so you can move them between hosts with snapshots and rsync. Update 2011-07-06: This is part of a wireshark capture, captured by a third VM on the same vSwitch. This all happens on the same host, no physical network involved. I've started ioping around time 20. There were no packets sent until the five second delay was over: No. Time Source Destination Protocol Info 1082 16.164096 192.168.250.10 192.168.250.20 NFS V3 WRITE Call (Reply In 1085), FH:0x3eb56466 Offset:0 Len:84 FILE_SYNC 1083 16.164112 192.168.250.10 192.168.250.20 NFS V3 WRITE Call (Reply In 1086), FH:0x3eb56f66 Offset:0 Len:84 FILE_SYNC 1084 16.166060 192.168.250.20 192.168.250.10 TCP nfs > iclcnet-locate [ACK] Seq=445 Ack=1057 Win=32806 Len=0 TSV=432016 TSER=769110 1085 16.167678 192.168.250.20 192.168.250.10 NFS V3 WRITE Reply (Call In 1082) Len:84 FILE_SYNC 1086 16.168280 192.168.250.20 192.168.250.10 NFS V3 WRITE Reply (Call In 1083) Len:84 FILE_SYNC 1087 16.168417 192.168.250.10 192.168.250.20 TCP iclcnet-locate > nfs [ACK] Seq=1057 Ack=773 Win=4163 Len=0 TSV=769110 TSER=432016 1088 23.163028 192.168.250.10 192.168.250.20 NFS V3 GETATTR Call (Reply In 1089), FH:0x0bb04963 1089 23.164541 192.168.250.20 192.168.250.10 NFS V3 GETATTR Reply (Call In 1088) Directory mode:0777 uid:0 gid:0 1090 23.274252 192.168.250.10 192.168.250.20 TCP iclcnet-locate > nfs [ACK] Seq=1185 Ack=889 Win=4163 Len=0 TSV=769821 TSER=432716 1091 24.924188 192.168.250.10 192.168.250.20 RPC Continuation 1092 24.924210 192.168.250.10 192.168.250.20 RPC Continuation 1093 24.924216 192.168.250.10 192.168.250.20 RPC Continuation 1094 24.924225 192.168.250.10 192.168.250.20 RPC Continuation 1095 24.924555 192.168.250.20 192.168.250.10 TCP nfs > iclcnet_svinfo [ACK] Seq=6893 Ack=1118613 Win=32625 Len=0 TSV=432892 TSER=769986 1096 24.924626 192.168.250.10 192.168.250.20 RPC Continuation 1097 24.924635 192.168.250.10 192.168.250.20 RPC Continuation 1098 24.924643 192.168.250.10 192.168.250.20 RPC Continuation 1099 24.924649 192.168.250.10 192.168.250.20 RPC Continuation 1100 24.924653 192.168.250.10 192.168.250.20 RPC Continuation 2nd Update 2011-07-06: There seems to be some influence from TCP window sizes. I was not able to reproduce this problem using FreeNAS (based on FreeBSD) as a NFS server. The wireshark captures showed TCP window updates to 29127 bytes in regular intervals. I did not see them with OpenIndiana, which uses larger window sizes by default. I can no longer reproduce this problem if I set the following options in OpenIndiana and restart the NFS server: ndd -set /dev/tcp tcp_recv_hiwat 8192 # default is 128000 ndd -set /dev/tcp tcp_max_buf 1048575 # default is 1048576 But this kills performance: Writing from /dev/zero to a file with dd_rescue goes from 170MB/s to 80MB/s. Update 2011-07-07: I've uploaded this tcpdump capture (can be analyzed with wireshark). In this case 192.168.250.2 is the NFS server (OpenIndiana b148) and 192.168.250.10 is the ESXi host. Things I've tested during this capture: Started "ioping -w 5 -i 0.2 ." at time 30, 5 second hang in setup, completed at time 40. Started "ioping -w 5 -i 0.2 ." at time 60, 5 second hang in setup, completed at time 70. Started "fsync-tester" at time 90, with the following output, stopped at time 120: fsync time: 0.0248 fsync time: 5.0197 fsync time: 5.0287 fsync time: 5.0242 fsync time: 5.0225 fsync time: 0.0209 2nd Update 2011-07-07: Tested another NFS server VM, this time NexentaStor 3.0.5 community edition: Shows the same problems. Update 2011-07-31: I can also reproduce this problem on the new ESXi build 4.1.0.433742.

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  • problem about gridview and baseadapter? Pls help

    - by flybirdtt
    I need a gridview to place 9 items. And i write a custom baseadapter. But find a problem about the position in the getView method.it looks like this gridview miss the 7th item.The code like this:` public View getView(int position, View convertView, ViewGroup parent) { LayoutDTO lDto = menuHashtable.get(Integer.toString(position)); ViewHolder vHolder = new ViewHolder(); if (lDto != null) { String titleString = lDto.getTitle(); Log.v("title...........", titleString + " " + Integer.toString(position) ); Bitmap iconBitmap = lDto.getIcon(); convertView = mInflater.inflate(R.layout.custombutton, null); vHolder.icon = (ImageView) convertView .findViewById(R.id.imageicon); vHolder.icon.setImageBitmap(iconBitmap); vHolder.text = (TextView) convertView .findViewById(R.id.icontitle); int index = titleString.indexOf("\u0026"); if (index != -1) { String title1 = titleString.substring(0, index + 1).trim(); String title2 = titleString.substring(index + 1, titleString.length()).trim(); vHolder.text.setLines(2); String newtitle = title1 + "\n" + title2; vHolder.text.setText(newtitle); } else { vHolder.text.setLines(2); String newtitle = titleString + "\n" + " "; vHolder.text.setText(newtitle); } convertView.setTag(vHolder); } return convertView; }` The log show this: 05-20 21:37:16.066: VERBOSE/title...........(158): Dining 0 05-20 21:37:16.105: VERBOSE/title...........(158): Dining 0 05-20 21:37:16.125: VERBOSE/title...........(158): Dining 0 05-20 21:37:16.135: VERBOSE/title...........(158): Dining 0 05-20 21:37:16.166: VERBOSE/title...........(158): Dining 0 05-20 21:37:16.185: VERBOSE/title...........(158): Entertainment 1 05-20 21:37:16.195: VERBOSE/title...........(158): Shopping 2 05-20 21:37:16.195: VERBOSE/title...........(158): Fashion 3 05-20 21:37:16.205: VERBOSE/title...........(158): Health & Beauty 4 05-20 21:37:16.215: VERBOSE/title...........(158): Supermarkets 5 05-20 21:37:16.226: VERBOSE/title...........(158): Auto Services 6 05-20 21:37:16.236: VERBOSE/title...........(158): Travel & Accommodation 8 05-20 21:37:16.316: VERBOSE/title...........(158): Dining 0 05-20 21:37:16.326: VERBOSE/title...........(158): Dining 0 05-20 21:37:16.336: VERBOSE/title...........(158): Dining 0 05-20 21:37:16.345: VERBOSE/title...........(158): Dining 0

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  • Are there any 17-20 inch monitors that support displayport?

    - by WildJoe
    I've got dual monitors now (both 20 inch 1600x1200). After seeing the new eyefinity cards out there (and reading the CodingHorror post on three monitors) I've decided to get a third. It's time to upgrade my video card anyway. Since I don't already have a third monitor and will be buying one new, I figure it'd make sense to buy one that already had a DisplayPort interface so as to avoid the adapter issue. However, I can't seem to find any monitors on newegg that support this (it's not even an option in the power search, and a keyword search turned up only adapters and video cards). A quick google showed me several 30 inchers (like Dell's, but that's way too expensive, and I don't have that much room on my desk even if I had that money) and some 22 inch models. Again, I'm looking for a 17-20 inch with a DisplayPort interface built in. Any suggestions?

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  • Wolkig und heiter

    - by A&C Redaktion
    Mit Solaris 11 bringt Oracle das erste Betriebssystem für die Cloud auf den Markt. Wir hatten es angekündigt, das Thema Cloud wird uns hier im Blog so schnell nicht loslassen: Am Freitag hat nun Oracle sein erstes Unix-Betriebssystem auf den Markt gebracht, das explizit für die Cloud designt wurde: Solaris 11 heißt es und hier ist die Assoziation zu Stanislaw Lems gleichnamigem Science Fiction-Roman durchaus angebracht: Schließlich gilt Cloud Computing als die Technologie der Zukunft schlechthin. Was bietet Solaris 11, welchen Nutzen können die Oracle Partner daraus ziehen? "Kunden können ihre Betriebsabläufe vereinfachen, die Kapazitäten ihrer Rechenzentren erhöhen und Unternehmensanwendungen von Oracle und anderen in einer sicheren, skalierbaren Cloud oder in einer klassischen Unternehmensumgebung laufen lassen“, fasst John Fowler, Executive Vice President, Systems zusammen. Darf‘s auch etwas konkreter sein? Bitte: Oracle Solaris 11 dient ganz einfach dazu, selbst anspruchsvollste Unternehmensanwendungen in privaten, hybriden und Public Clouds zu betreiben. Als vollständig virtualisiertes Betriebssystem verfügt es über integrierte Virtualisierungs-Funktionen, sowohl für Betriebssystem- als auch für Netzwerk- und Speicher-Ressourcen. Die Server-Virtualisierung sorgt für sichere Live-Migration und flexible Einsatzmöglichkeiten – basierend auf Oracle VM für x86- und SPARC-Systeme. Höchste Verfügbarkeit wird erreicht, indem Solaris 11 ein umfassendes Management über die gesamte Infrastruktur hinweg ermöglicht. Oracle Solaris 11 bietet bereits im Standardbetrieb aktive Sicherheit „by default“, wie rollenbasierten Root-Zugriff und Überwachungsfunktionen. Die Daten- und Speichermanagement-Basis für Oracle Solaris 11 ist Oracle Solaris ZFS. Neben garantierter Datenintegrität erlaubt das Tiered Storage das Einrichten von Pools mit Flash-Speicher und zudem Hochgeschwindigkeitsverschlüsselung. Ein Blick in die Presse zeigt, dass Solaris 11 durchaus für Aufsehen in der Fachwelt sorgt, so äußert sich etwa die Netzwelt sehr positiv: „Die neue Paketverwaltung IPS trägt wie die genannten Neuerungen dazu bei, dass Solaris es in Version 11 durchaus wieder mit den etablierten Linux-Distributionen aufnehmen kann. Das Betriebssystem macht nicht nur im Server-, sondern auch im Desktop-Einsatz eine sehr gute Figur und glänzt mit hoher Stabilität.“ Hier die direkten Links zu weiteren Berichten über Solaris11 in der Fachpresse: Heise onlineZDNetGolem.deSilicon.deAll about SECURITYIT DirectorPro-Linux.deTech ChannelLinux Magazin

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  • Flashback Data Archives: Ein gutes Gedächtnis für DBA und Entwickler

    - by Heinz-Wilhelm Fabry (DBA Community)
    Daten werden gespeichert und zum Teil lange aufbewahrt. Mitunter werden Daten nach ihrer ersten Speicherung geändert, vielleicht sogar mehrfach. Je nach gesetzlicher oder betrieblicher Vorgabe müssen die Veränderungen sogar nachverfolgbar sein. Damit sind zugleich Mechanismen gefordert, die sicherstellen, dass die Folge der Versionen lückenlos ist. Und implizit bedeutet das zusätzlich, dass die Versionen auch vor Löschen und Verändern geschützt sein müssen. Das Versionieren kann über die Anwendung, mit der die Daten auch erfasst werden, erfolgen, über Trigger oder über besondere Werkzeuge. Jede dieser Lösungen hat ihre eigenen Schwächen. Zusätzlich steht die Frage nach dem Schutz vor unerlaubtem Löschen oder Ändern versionierter Daten im Raum. Flashback Data Archives lösen diese Frage, denn sie bieten nicht nur einen wirksamen Mechanismus zum Versionieren von Datensätzen, sondern sie schützen diese Versionen auch vor Veränderung und löschen sie schließlich sogar automatisch nach Ablauf ihrer Aufbewahrungsfrist.Ursprünglich wurden die Archive als eigenständige Option zur Enterprise Edition der Oracle Database 11g unter dem Namen Total Recall eingeführt. Ende Juni 2012 verloren die Flashback Data Archives ihren Status als eigenständige Option. Weil die Archive aber grundsätzlich komprimiert wurden, hat Oracle sie stattdessen zu einem Feature der Advanced Compression Option der Enterprise Edition (ACO) gemacht. Seit der Version 11.2.0.4 der Datenbank ist das Komprimieren aber für die Archive nicht mehr zwangsläufig, sondern optional. Damit gibt es lizenzrechtlich erneut eine Änderung: Wer die Kompression verwendet, der muss nach wie vor ACO lizensieren. Wer die Flashback Data Archives dagegen ohne Kompression verwendet - also zum Beispiel Entwickler -, dem stehen sie ab 11.2.0.4 aufwärts im Lieferumfang aller Editionen der Datenbank zur Verfügung. Diese Änderung ist in den Handbüchern zur Lizensierung der Versionen 11.2 und 12.1 der Datenbank dokumentiert. Im Rahmen der DBA Community ist bereits über die Flashback Data Archives berichtet worden. Der hier vorliegende Artikel ersetzt alle vorangegangenen Beiträge zum Thema.

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