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Search found 305 results on 13 pages for 'marcus morris'.

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  • Setting up a network where packets are traced

    - by Marcus
    My situation is the following: I have an internet connection, which is shared between people. More or less obviously, people is using it to download illegal stuff. Since I'm the owner of the connection, I want to avoid being sued. I don't want to prevent the people from doing the things they want, but I want to be legally safe. Now, I have relatively little competences in network administration, so I was wondering: is it possible to setup a network, where the source and destination of the packets are logged? I would use this to prove, in case of lawsuit, that the traffic was coming from a given machine. if the idea is feasible, is there any wireless router on which I can install linux, where I can install the packet sniffer? how much space could the logs take (containing only the timestamp/source/destination), per GB of traffic? a very rough estimation would be very helpful. if a machine on my network is sending bittorrent packets to a certain IP, would this log be able to reflect the time, source ip and destination ip? I assume that obviously the torrent data would be encrypted and un-decryptable. Am I missing something? Is there a better strategy? Any pointer to documentation would be helpful as well - in that case, I would use this as starting point.

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  • Avoid blocked URL's when on VPN from home

    - by Marcus
    When I'm on my home PC and on my company VPN I can't get to sites that my company blocks. Is there a way to get around this? Why do my requests to facebook.com go through the VPN? Can you configure your system to, for instance, not go through the VPN for HTTP traffic?

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  • Why is a single thread spread across CPU's?

    - by Marcus Lindblom
    I'm just curious why the scheduler constantly moves an app between CPUs, rather than keeping it on one. It looks a bit silly to have 4 cores at 25% rather than one at 100%. Does it has to do with heat, or is it more efficient somehow? Do other OS's do it differently? Insights or links to in-depth stuff would be nice. (Couldn't find much myself.) Update: By "spread out" I don't mean that it executes on several cpu's at once, but is being moved from one to the other several times per second, making the effect that it looks spread out.

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  • Drupal on an NFS share has terrible performance

    - by Marcus
    We have a setup where a Drupal 7 site with the following setup - a VMware ESXi 4.1 host server running a web vm and an NFS VM. The web VM is using Apache and mod_php. The site is still in development thus we have to turn off all forms of caching due to the frequently-updated files. Each page request takes around 15-20 seconds to complete. Profiling the PHP code shows that the vast majority of time (normally over 90%) is taking by all the is_dir(), is_file() function calls that load up the modules. I've increased PHP's realpath cache size to several megs and an strace shows that the lstat calls then drop from over 200 to around 6 and stat() decreases a bit (around 600 calls). However, while this has shaved off quite a bit of time, I am simply unable to break past the 10 second per request barrier. Is there a way to get better performance out of this setup that doesn't involve caching? Configs and stats: VMs: web - Centos 6 64bt, 2.5GB RAM, normal CPU/HD prioritisation nfs - Centos 6 64bt, 2GB RAM, normal CPU priority, high HD priority PHP: 32M realpath cache size (it's this high for testing purposes) NFS: ~]# egrep -v '#|^$' /etc/nfsmount.conf [ NFSMount_Global_Options ] Defaultvers=4 Ac=False Rsize=32k Wsize=32k Bsize=32k Reading speeds via NFS are not an issue a dd of a 100M test file using 32k blocks returns: 3200+0 records in 3200+0 records out 104857600 bytes (105 MB) copied, 1.84984 s, 56.7 MB/s real 0m1.857s user 0m0.007s sys 0m0.330s Strace on Apache process with empty realpath cache: % time seconds usecs/call calls errors syscall ------ ----------- ----------- --------- --------- ---------------- 50.78 1.157452 337 3434 28 stat 32.58 0.742656 628 1182 425 open 9.29 0.211788 762 278 1 lstat 3.17 0.072322 0 237865 write 2.45 0.055839 490 114 13 access 0.45 0.010262 43 237 brk 0.34 0.007725 10 811 74 read 0.28 0.006340 9 679 fstat 0.22 0.005069 18 281 poll 0.20 0.004533 6 698 getdents 0.09 0.001960 10 190 mmap 0.05 0.001065 14 74 accept4 0.04 0.001000 333 3 chdir 0.03 0.000750 4 190 munmap 0.01 0.000339 0 836 close 0.01 0.000247 3 75 writev 0.00 0.000068 0 611 fcntl 0.00 0.000063 1 77 shutdown 0.00 0.000000 0 1 lseek 0.00 0.000000 0 5 rt_sigaction 0.00 0.000000 0 1 rt_sigprocmask 0.00 0.000000 0 3 setitimer 0.00 0.000000 0 5 socket 0.00 0.000000 0 5 5 connect 0.00 0.000000 0 74 getsockname 0.00 0.000000 0 15 setsockopt 0.00 0.000000 0 5 getcwd 0.00 0.000000 0 1 futex ------ ----------- ----------- --------- --------- ---------------- Strace after realpaths are cached % time seconds usecs/call calls errors syscall ------ ----------- ----------- --------- --------- ---------------- 60.14 1.371006 484 2831 28 stat 31.79 0.724705 627 1155 425 open 3.53 0.080354 0 237865 write 2.65 0.060433 530 114 13 access 0.43 0.009913 99 100 brk 0.38 0.008730 11 804 74 read 0.35 0.007910 12 675 fstat 0.30 0.006775 10 654 getdents 0.13 0.003065 11 281 poll 0.09 0.002000 333 6 1 lstat 0.07 0.001545 2 807 close 0.05 0.001063 14 74 accept4 0.04 0.001000 6 179 mmap 0.02 0.000404 2 179 munmap 0.01 0.000271 4 75 writev 0.01 0.000212 0 611 fcntl 0.01 0.000129 2 77 shutdown 0.00 0.000022 0 74 getsockname 0.00 0.000000 0 1 lseek 0.00 0.000000 0 5 rt_sigaction 0.00 0.000000 0 1 rt_sigprocmask 0.00 0.000000 0 3 setitimer 0.00 0.000000 0 3 socket 0.00 0.000000 0 3 3 connect 0.00 0.000000 0 15 setsockopt 0.00 0.000000 0 5 getcwd 0.00 0.000000 0 3 chdir ------ ----------- ----------- --------- --------- ---------------- Mount: nfs.xxx.xxx.xxx:/path/to/website/files on /path/to/website/files type nfs (rw,hard,intr,noac,vers=4,addr=xx.xx.xx.xx,clientaddr=xx.xx.xx.xx) Any help is, naturally, appreciated.

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  • I want Lotus Domino to only send one email to users that are both recipients and members of a cc'ed lotus group.

    - by Marcus
    Lotus Domino 7 and now Lotus Domino 8.5 The scenario: A@mycompany writes an email to b@internet and cc's it to group@mycompany. A@mycompany is a member of group@mycompany. With the initial email Domino is intelligent enough to not send the email which a@mycompany just wrote to a@mycompany again. But when b@internet answers to all (a@mycompany + group@mycompany) then a@mycompany gets this email twice, because he is not only the author but also a member of group@mycompany. During the smtp session the email is sent once with the recipients set to a@mycompany and group@mycompany and a single esmtp id. So Domino should well be able to see that the mail should only be sent to a@mycompany once. Can I make Lotus Domino behave in this sane fashion?

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  • Download all Flickr sets/images?

    - by Marcus
    We'd like to download all our Flickr photos & sets to iPhoto or just to a PC directory so we can sync our photos & sets to our iPhones (and possibly get off Flickr). Is there a way to do this? Update: We do have a pro account right now.

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  • DRBD stacked resources: recovering from failure

    - by Marcus Downing
    We're running a stacked four-node DRBD setup like this: A --> B | | v v C D This means three DRBD resources running across these four servers. Servers A and B are Xen hosts running VMs, while servers C and D are for backups. A is in the same datacentre as C. From server A to server C, in the first datacentre, using protocol B From server B to server D, in the second datacentre, using protocol B From server A to server B, different datacentres, stacked resource using protocol A First question: booting a stacked resource We haven't got any vital data running on this setup yet - we're still making sure it works first. This means simulating power cuts, network outages etc and seeing what steps we need to recover. When we pull the power out of server A, both resources go down; it attempts to bring them back up at next boot. However, it only succeeds at bringing up the lower-level resource, A-C. The stacked resource A-B doesn't even try to connect, presumably because it can't find the device until it's a connected primary on the lower level. So if anything goes wrong we need to manually log in and bring that resource up, then start the virtual machine on top of it. Second question: setting the primary of a stacked resource Our lower-level resources are configured so that the right one is considered primary: resource test-AC { on A { ... } on C { ... } startup { become-primary-on A; } } But I don't see any way to do the same with a stacked resource, as the following isn't a valid config: resource test-AB { stacked-on-top-of test-AC { ... } stacked-on-top-of test-BD { ... } startup { become-primary-on test-AC; } } This too means that recovering from a failure requires manual intervention. Is there no way to set the automatic primary for a stacked resource?

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  • SPF for two different outgoing servers?

    - by Marcus
    I have ran into a problem that I think someone should have a really clever answer for. Today we have our own mailserver that looks like "mail.domain.com" – which we use to send out mail to our customers (with a modified PHPMailer script). Usually around 5000 mails every day. Everything from customer support to invoices goes through there. The from-header is set to "[email protected]". We are now thinking of migrating to Google Apps for internal use (with 70+ users). However, we cannot use Gmails SMTP for sending "bulk" mails (they have a limit of 500 outgoing mails per day) so we really want to keep using our current system for sending automated mail to our customers – and using gmails SMTP for our internal use. So, how do we set up our SPF-records (Sender Policy Framework) for this? We do not want to get stuck in any filters for "spoofing" the sender from either type of account (the ones sent from our own server, and through Gmails). In short: we want to be able to use the same e-mail adress (for sending) on two different SMTP servers (and therefore two different IP-adresses). Anyone with a good knowledge off SPF who knows how to go about? Or if it is even possible? Anything else I should think of when switching to Google Apps?

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  • Can I recover a lost text file in Windows 7?

    - by Marcus Johnson
    How can I recover a lost text file in Windows 7?? It has very important information in it and of course, it is gone because of the stupid Windows Update thing....it just automatically closed all of my stuff and restarted my computer!! Would the text file possibly be in the Temp folder in my computer?? I don't know much about this stuff...but I need it. I didn't save the file which makes me think I can never get it back...but I want to make sure. Thanks. I was using notepad.

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  • Is it possible to change the postfix message-id?

    - by Marcus
    Is it possible to change the message-id in postfix? If I send Mails over an Java-Application I get the following message-id: message-id=<143303043.111334605578921.JavaMail.applicationanme@hostname> So I want that the message-id looks like this: message-id=<[email protected]> What I can understand, if I send mails with the Linux program mail it works: message-id=<[email protected]> I have already set my hostname in the postfix-conf, but when I send a mail with the java-application it doen't work. We use a relay host to send email and any messages which are sent without @domain.tld in the mail-id will detected as a spam mail. Do you have any idea how I can fix this?

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  • Monitoring folder diffs across servers with zabbix

    - by Marcus
    Problem: I want to make sure that a certain folder is equal regarding it's contents across my servers. I do not want an automatic filesync to keep them equal, changing is done manually. My initial thought was to once a day calculate some crc/hash on folder and send to Zabbix, and trigger when values differ. Is there any good tools out there that can calculate crc or similar of a folder? Anyone know of another solution that solves my problem?

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  • DVD/CD-ROM drives stop working in Windows 7

    - by Marcus L
    All of a sudden Windows 7 (64 bit) lost all DVD and CD-ROM drives. It worked fine for about a month, then I don't know what happened. At first I thought it was a hardware problem - that my DVD-ROM had malfunctioned. But then I realized that Windows 7 no longer picked up on Demon Tools drives either. I can boot both Windows installation and Knoppix from the DVD-drive. So it seems to be a general problem with "disc-media". When trying to reinstall the hardware DVD-ROM Windows recognizes the drive (though sometimes simply label it as "CD-ROM drive"), but then says something went wrong - with from what I understand is a default error message (39), claiming the driver has become corrupt. I've tried every Microsoft recommended action, i.e. uninstall, reinstall, look for driver updates etc. etc., but with no luck. Any tip most welcome!

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  • Solaris 10: Identify a PID and the CPU it's running on

    - by Marcus
    I have multiple instances of a database running on a Solaris system. I'd like to prove that each database process is being handled by a different CPU. Essentially, I want to be able to do something like a ps -ef | grep <process_name> to get the PIDs and then run another command (if required) to identify the CPU... Is prstat able to do this? I'm making an assumption that as each database instance is started each one uses a different CPU. I'm not sure if I'm understanding this correctly... The reason I want to do this is because Sun hardware has slow CPU's, but lots of them. Therefore, to get the best performance out of it, I need to try and spread the load among CPU's... Thanks

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  • Solaris 10: Identify a PID and the CPU it's running on

    - by Marcus
    I have multiple instances of a database running on a Solaris system. I'd like to prove that each database process is being handled by a different CPU. Essentially, I want to be able to do something like a ps -ef | grep <process_name> to get the PIDs and then run another command (if required) to identify the CPU... Is prstat able to do this? I'm making an assumption that as each database instance is started each one uses a different CPU. I'm not sure if I'm understanding this correctly... The reason I want to do this is because Sun hardware has slow CPU's, but lots of them. Therefore, to get the best performance out of it, I need to try and spread the load among CPU's... Thanks

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  • [News] Interview de Don Syme, le cr?ateur de F#

    Nous avons plusieurs fois eu l'occasion de mentionner Don Syme sur DNG, notamment lors de son travail sur les g?n?rics dans C#. Responsable R&D chez MS Research ? Cambridge, il contribue d?sormais ? F# et r?pond ici ? une interview de Richard Morris. Tr?s int?ressant.

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  • Meredith Ryan: DBA of the Day

    Meredith Ryan – DBA at the Bell Group –was elected by judges and the SQL Server community as the Exceptional DBA of 2012. So who is Meredith, and how did she become a DBA? What makes her exceptional at her work? Simple-Talk sent Richard Morris to investigate. 12 essential tools for database professionalsThe SQL Developer Bundle contains 12 tools designed with the SQL Server developer and DBA in mind. Try it now.

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  • How To Record Great Vocals at Home

    How to record great vocals You have a great voice; so that?s all you need to record great vocals isn?t it? If only it was as simple as that. Well, now it can be. Many things ranging from acoustic co... [Author: Fallon Morris - Computers and Internet - May 31, 2010]

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  • How do I use waf to build a shared library?

    - by James Morris
    I want to build a shared library using waf as it looks much easier and less cluttered than GNU autotools. I actually have several questions so far related to the wscript I've started to write: VERSION='0.0.1' APPNAME='libmylib' srcdir = '.' blddir = 'build' def set_options(opt): opt.tool_options('compiler_cc') pass def configure(conf): conf.check_tool('compiler_cc') conf.env.append_value('CCFLAGS', '-std=gnu99 -Wall -pedantic -ggdb') def build(bld): bld.new_task_gen( features = 'cc cshlib', source = '*.c', target='libmylib') The line containing source = '*.c' does not work. Must I specify each and every .c file instead of using a wildcard? How can I enable a debug build for example (currently the wscript is using the debug builds CFLAGS, but I want to make this optional for the end user). It is planned for the library sources to be within a sub directory, and programs that use the lib each in their own sub directories.

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  • How to recall search pattern when writing replace regex pattern in Vim?

    - by Tom Morris
    Here's the scenario: I've got a big file filled with all sorts of eclectic rubbish that I want to regex. I fiddle around and come up with a perfect search pattern by using the / command and seeing what it highlights. Now I want to use that pattern to replace with. So, I start typing :%s/ and I cannot recall what the pattern was. Is there some magical keyboard command that will pull in my last search pattern here? If I'm writing a particularly complex regex, I have even opened up a new MacVim window, typed the regex from the first window into a buffer there, then typed it back into the Vim window when writing the replace pattern. There has got to be a better way of doing so.

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  • Including two signatures, both with a 'type t' [Standard ML]

    - by Andy Morris
    A contrived example: signature A = sig type t val x: t end signature B = sig type t val y: t end signature C = sig include A B end Obviously, this will cause complaints that type t occurs twice in C. But is there any way to express that I want the two ts to be equated, ending up with: signature C = sig type t val x: t val y: t end I tried all sorts of silly syntax like include B where type t = A.t, which unsurprisingly didn't work. Is there something I've forgotten to try? Also, I know that this would be simply answered by checking the language's syntax for anything obvious (or a lack of), but I couldn't find a complete grammar anywhere on the internet. (FWIW, the actual reason I'm trying to do this is Haskell-style monads and such, where a MonadPlus is just a mix of a Monad and an Alternative; at the moment I'm just repeating the contents of ALTERNATIVE in MONAD_PLUS, which strikes me as less than ideal.)

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