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  • Incredibly high latency for Ubuntu guest on Hyper-V

    - by Mark Henderson
    I've got several Ubuntu 10.04 virtual machines running as Hyper-V guests on Windows Server 2008 R2 SP1 and they're all perfectly fine. Today I installed my first Ubuntu 11.10 virtual machine and I'm seeing rediculous pings: These servers are all connected via gigabit to a local LAN, with almost no network traffic at all1, with a legacy network adapter in Hyper-V. I'm a bit of an Ubuntu n00b so I don't really know where to go from here. Any ideas? free -m reports: total used free shared buffers cached Mem: 485 470 15 0 63 299 -/+ buffers/cache: 107 378 Swap: 507 20 487 This is within a few mb of our other Ubuntu servers that are on 10.04. I removed the Legacy NIC and installed a Synthetic one in Hyper-V and this did improve the numbers, in that they're around 10-30ms now, but I would still be expecting <1ms response times. 1As a comparison, I have another Ubuntu 10.04 guest on Hyper-V almost 1,000km away that has a ping of 33ms

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  • httpd keeps crashing without any reference to why in the logs

    - by Fred
    I have the logs set to debug in the hopes of tracking down what's causing the crash, but I can't find anything. Here is the error_log. [Thu Jan 06 10:27:35 2011] [debug] proxy_util.c(1967): proxy: initialized single connection worker 0 in child 19999 for (*) [Thu Jan 06 14:47:04 2011] [notice] suEXEC mechanism enabled (wrapper: /usr/sbin/suexec) [Thu Jan 06 14:47:04 2011] [info] Init: Seeding PRNG with 256 bytes of entropy [Thu Jan 06 14:47:04 2011] [info] Init: Generating temporary RSA private keys (512/1024 bits) [Thu Jan 06 14:47:04 2011] [info] Init: Generating temporary DH parameters (512/1024 bits) [Thu Jan 06 14:47:04 2011] [info] Init: Initializing (virtual) servers for SSL [Thu Jan 06 14:47:04 2011] [info] Server: Apache/2.2.3, Interface: mod_ssl/2.2.3, Library: OpenSSL/0.9.8e-fips-rhel5 [Thu Jan 06 14:47:04 2011] [notice] Digest: generating secret for digest authentication ... [Thu Jan 06 14:47:04 2011] [notice] Digest: done [Thu Jan 06 14:47:04 2011] [debug] util_ldap.c(2021): LDAP merging Shared Cache conf: shm=0xb9dc2480 rmm=0xb9dc24b0 for VHOST: server.fredfinn.com [Thu Jan 06 14:47:04 2011] [info] APR LDAP: Built with OpenLDAP LDAP SDK [Thu Jan 06 14:47:04 2011] [info] LDAP: SSL support available [Thu Jan 06 14:47:05 2011] [info] Init: Seeding PRNG with 256 bytes of entropy [Thu Jan 06 14:47:05 2011] [info] Init: Generating temporary RSA private keys (512/1024 bits) [Thu Jan 06 14:47:05 2011] [info] Init: Generating temporary DH parameters (512/1024 bits) [Thu Jan 06 14:47:05 2011] [debug] ssl_scache_shmcb.c(374): shmcb_init allocated 512000 bytes of shared memory [Thu Jan 06 14:47:05 2011] [debug] ssl_scache_shmcb.c(554): entered shmcb_init_memory() [Thu Jan 06 14:47:05 2011] [debug] ssl_scache_shmcb.c(576): for 512000 bytes, recommending 4266 indexes [Thu Jan 06 14:47:05 2011] [debug] ssl_scache_shmcb.c(619): shmcb_init_memory choices follow [Thu Jan 06 14:47:05 2011] [debug] ssl_scache_shmcb.c(621): division_mask = 0x1F [Thu Jan 06 14:47:05 2011] [debug] ssl_scache_shmcb.c(623): division_offset = 64 [Thu Jan 06 14:47:05 2011] [debug] ssl_scache_shmcb.c(625): division_size = 15998 [Thu Jan 06 14:47:05 2011] [debug] ssl_scache_shmcb.c(627): queue_size = 1604 [Thu Jan 06 14:47:05 2011] [debug] ssl_scache_shmcb.c(629): index_num = 133 [Thu Jan 06 14:47:05 2011] [debug] ssl_scache_shmcb.c(631): index_offset = 8 [Thu Jan 06 14:47:05 2011] [debug] ssl_scache_shmcb.c(633): index_size = 12 [Thu Jan 06 14:47:05 2011] [debug] ssl_scache_shmcb.c(635): cache_data_offset = 8 [Thu Jan 06 14:47:05 2011] [debug] ssl_scache_shmcb.c(637): cache_data_size = 14386 [Thu Jan 06 14:47:05 2011] [debug] ssl_scache_shmcb.c(650): leaving shmcb_init_memory() [Thu Jan 06 14:47:05 2011] [info] Shared memory session cache initialised [Thu Jan 06 14:47:05 2011] [info] Init: Initializing (virtual) servers for SSL [Thu Jan 06 14:47:05 2011] [info] Server: Apache/2.2.3, Interface: mod_ssl/2.2.3, Library: OpenSSL/0.9.8e-fips-rhel5 [Thu Jan 06 14:47:05 2011] [warn] pid file /etc/httpd/run/httpd.pid overwritten -- Unclean shutdown of previous Apache run? [Thu Jan 06 14:47:05 2011] [debug] proxy_util.c(1854): proxy: grabbed scoreboard slot 0 in child 26527 for worker proxy:reverse [Thu Jan 06 14:47:05 2011] [debug] proxy_util.c(1967): proxy: initialized single connection worker 0 in child 26527 for (*) [Thu Jan 06 14:47:05 2011] [debug] proxy_util.c(1854): proxy: grabbed scoreboard slot 0 in child 26528 for worker proxy:reverse [Thu Jan 06 14:47:05 2011] [debug] proxy_util.c(1873): proxy: worker proxy:reverse already initialized [Thu Jan 06 14:47:05 2011] [debug] proxy_util.c(1967): proxy: initialized single connection worker 0 in child 26528 for (*) [Thu Jan 06 14:47:05 2011] [debug] proxy_util.c(1854): proxy: grabbed scoreboard slot 0 in child 26529 for worker proxy:reverse [Thu Jan 06 14:47:05 2011] [debug] proxy_util.c(1873): proxy: worker proxy:reverse already initialized [Thu Jan 06 14:47:05 2011] [debug] proxy_util.c(1967): proxy: initialized single connection worker 0 in child 26529 for (*) [Thu Jan 06 14:47:05 2011] [debug] proxy_util.c(1854): proxy: grabbed scoreboard slot 0 in child 26530 for worker proxy:reverse [Thu Jan 06 14:47:05 2011] [debug] proxy_util.c(1873): proxy: worker proxy:reverse already initialized [Thu Jan 06 14:47:05 2011] [debug] proxy_util.c(1967): proxy: initialized single connection worker 0 in child 26530 for (*) [Thu Jan 06 14:47:05 2011] [debug] proxy_util.c(1854): proxy: grabbed scoreboard slot 0 in child 26532 for worker proxy:reverse [Thu Jan 06 14:47:05 2011] [debug] proxy_util.c(1873): proxy: worker proxy:reverse already initialized [Thu Jan 06 14:47:05 2011] [debug] proxy_util.c(1967): proxy: initialized single connection worker 0 in child 26532 for (*) [Thu Jan 06 14:47:05 2011] [debug] proxy_util.c(1854): proxy: grabbed scoreboard slot 0 in child 26533 for worker proxy:reverse [Thu Jan 06 14:47:05 2011] [debug] proxy_util.c(1873): proxy: worker proxy:reverse already initialized [Thu Jan 06 14:47:05 2011] [debug] proxy_util.c(1967): proxy: initialized single connection worker 0 in child 26533 for (*) [Thu Jan 06 14:47:05 2011] [debug] proxy_util.c(1854): proxy: grabbed scoreboard slot 0 in child 26534 for worker proxy:reverse [Thu Jan 06 14:47:05 2011] [debug] proxy_util.c(1873): proxy: worker proxy:reverse already initialized [Thu Jan 06 14:47:05 2011] [debug] proxy_util.c(1967): proxy: initialized single connection worker 0 in child 26534 for (*) [Thu Jan 06 14:47:05 2011] [notice] Apache/2.2.3 (CentOS) configured -- resuming normal operations [Thu Jan 06 14:47:05 2011] [info] Server built: Aug 30 2010 12:32:08 [Thu Jan 06 14:47:05 2011] [debug] prefork.c(991): AcceptMutex: sysvsem (default: sysvsem) [Thu Jan 06 14:47:05 2011] [debug] proxy_util.c(1854): proxy: grabbed scoreboard slot 0 in child 26531 for worker proxy:reverse [Thu Jan 06 14:47:05 2011] [debug] proxy_util.c(1873): proxy: worker proxy:reverse already initialized [Thu Jan 06 14:47:05 2011] [debug] proxy_util.c(1967): proxy: initialized single connection worker 0 in child 26531 for (*) The logs are setup as: ErrorLog logs/error_log LogLevel debug LogFormat "%h %l %u %t \"%r\" %>s %b \"%{Referer}i\" \"%{User-Agent}i\"" combined LogFormat "%h %l %u %t \"%r\" %>s %b" common LogFormat "%{Referer}i -> %U" referer LogFormat "%{User-agent}i" agent CustomLog logs/access_log common CustomLog logs/access_log combined ServerSignature On

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  • PostgreSQL server: 10k RPM SAS or Intel 520 Series SSD drives?

    - by Vlad
    We will be expanding the storage for a PostgreSQL server and one of the things we are considering is using SSDs (Intel 520 Series) instead of rotating discs (10k RPM). Price per GB is comparable and we expect improved performance, however we are concerned about longevity since our database usage pattern is quite write-heavy. We are also concerned about data corruption in case of power failure (due to SSDs write cache not flushing properly). We currently use RAID10 with 4 active HDDs (10k 146GB) and 1 spare configured in the controller. It's a HP DL380 G6 server with P410 Smart Array Controller and BBWC. What makes more sense: upgrading the drives to 300GB 10k RPM or using Intel 520 Series SSDs (240GB)?

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  • Hide overflow in Silverlight TextBox

    - by chrisbz
    I have a Silverlight TextBox control that is inside of a Grid column with the width set to 'Auto', so the TexBox's width expands/contracts with the browser window is resized. Unfortunately, when the number of characters entered into the textbox exceeds the textbox's width, the textbox grows to accommodate it. Are there any properties that can be applied to the textbox that will force it to not expand with the number of characters inside of it? Thanks.

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  • JavaScript window resize

    - by Happy
    I have piece of javascript code, which should process when the browser window is resized. var resize=$('div.resize',$(this).parent())[0]; resize.style.marginRight=(resize.offsetWidth-$(this)[0].offsetWidth)+'px' Tryed this stuff (doesn't work): var resize=$('div.resize',$(this).parent())[0]; window.onresize = function(event) { resize.style.marginRight=(resize.offsetWidth-$(this)[0].offsetWidth)+'px' } Thanks.

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  • Interface Builder can't see classes in a static library

    - by teabot
    I have refactored some UIView sub-classes into a static library. However, when using Interface Builder to create view components for a project that uses the static library I find that it is unaware of the library classes. What do I need to do to make the class interfaces visible to Interface Builder? Update: The correct answer refers to dragging the headers into the 'XIB browser'. The '.h' files can be dragged from a finder window to the window area identified in this image:

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  • How do I use an internal SSD as a scratch disk for FCP X?

    - by andrewb
    I'm contemplating setting up my MacBook Air as a video editing machine. If I do this, I'll upgrade to a 256 GB SSD, and I should be able to keep around 100 GB or more free for video editing. The video files would of course be stored externally, but save purchasing some expensive Thunderbolt RAID device (which I suppose is gradually becoming more of an option), it will be slow for read/writes. How can I have a set up where I take advantage of my SSD's speed for a scratch disk/cache for FCP X, but still have the TB(s) of storage of externals? I don't want to have to be moving files constantly back and forth, this is about saving time not wasting it.

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  • Issue varnish purge through CloudFlare to Varnish

    - by Michael
    I've been working on this for a while and can't seem to find any solution. I have varnish sitting in front of my nginx server, with CloudFlare sitting in front. When I issue a curl -X PURGE host CloudFlare picks it up and of course denies it with a 503 error. If I use direct.host to bypass CloudFlare it hits the Varnish server and it accepts the request but it does nothing since direct.host isn't used so there is nothing in the cache for that url. I am using WordPress and there is a WordPress Varnish Purge plugin, it says to add the following line to wp-config.php: define('VHP_VARNISH_IP','127.0.0.1') This is specifically to work with proxy servers and/or CloudFlare to make sure the request goes to the Varnish server rather than CloudFlare, but that doesn't seem to help. Anyone see this before and have any idea?

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  • Some questions about writing on ASP.NET response stream

    - by vtortola
    Hi, I'm making tests with ASP.NET HttpHandler for download a file writting directly on the response stream, and I'm not pretty sure about the way I'm doing it. This is a example method, in the future the file could be stored in a BLOB in the database: public void GetFile(HttpResponse response) { String fileName = "example.iso"; response.ClearHeaders(); response.ClearContent(); response.ContentType = "application/octet-stream"; response.AppendHeader("Content-Disposition", "attachment; filename=" + fileName); using (FileStream fs = new FileStream(Path.Combine(HttpContext.Current.Server.MapPath("~/App_Data"), fileName), FileMode.Open)) { Byte[] buffer = new Byte[4096]; Int32 readed = 0; while ((readed = fs.Read(buffer, 0, buffer.Length)) > 0) { response.OutputStream.Write(buffer, 0, readed); response.Flush(); } } } But, I'm not sure if this is correct or there is a better way to do it. My questions are: When I open the url with the browser, appears the "Save File" dialog... but it seems like the server has started already to push data into the stream before I click "Save", is that normal? If I remove the line"response.Flush()", when I open the url with the browser, ... I see how the web server is pushing data but the "Save File" dialog doesn't come up, (or at least not in a reasonable time fashion) why? When I open the url with a WebRequest object, I see that the HttpResponse.ContentLength is "-1", although I can read the stream and get the file. What is the meaning of -1? When is HttpResponse.ContentLength going to show the length of the response? For example, I have a method that retrieves a big xml compresed with deflate as a binary stream, but in that case... when I access it with a WebRequest, in the HttpResponse I can actually see the ContentLength with the length of the stream, why? What is the optimal length for the Byte[] array that I use as buffer for optimal performance in a web server? I've read that is between 4K and 8K... but which factors should I consider to make the correct decision. Does this method bloat the IIS or client memory usage? or is it actually buffering the transference correctly? Sorry for so many questions, I'm pretty new in web development :P Cheers.

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  • Dreaded python encoding errors, how to stop them?

    - by Rhubarb
    These have been plaguing me endlessly. Why? It seems that my console can't handle the encoding. I take it that the my browser and word processor can handle it. I don't have a master list of all the possible characters that it's choking on. What is the best way to relieve this without modifying my data? 'charmap' codec can't encode character u'\xca'

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  • flex4: swfloader doesn't properly load games.

    - by ufk
    Hiya. I have several flash games that when i load them in my firefox browser they load fine, but when i load them with swfloader using flex 4 (flash builder) they load until 100% and don't show the start menu. any ideas how to resolve the issue ?

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  • Visual Studio 2010 HTML Designer Renders Unlike IE8?

    - by Luke Puplett
    My question is: since Visual Studio 2010 was only just released, why does it not render pages in the same way as the latest Microsoft web browser, IE8? Is there a bunch of render options I should be setting? I thought Expression Web was supposed to help with its fancy Super Preview but that app doesn't even open VS solutions. Thanks for any assistance, Luke

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  • ZFS SAS/SATA controller recommendations

    - by ewwhite
    I've been working with OpenSolaris and ZFS for 6 months, primarily on a Sun Fire x4540 and standard Dell and HP hardware. One downside to standard Perc and HP Smart Array controllers is that they do not have a true "passthrough" JBOD mode to present individual disks to ZFS. One can configure multiple RAID 0 arrays and get them working in ZFS, but it impacts hotswap capabilities (thus requiring a reboot upon disk failure/replacement). I'm curious as to what SAS/SATA controllers are recommended for home-brewed ZFS storage solutions. In addition, what effect does battery-backed write cache (BBWC) have in ZFS storage?

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  • How to add new partition to RAID-1 array on Redhat FC10?

    - by Peter Scott
    I have a RH FC10 system with RAID 1 partitions, here is mdadm.conf: # mdadm.conf written out by anaconda DEVICE partitions MAILADDR root ARRAY /dev/md1 level=raid1 num-devices=2 metadata=0.90 UUID=9588bfe1:ddfd5858:1067c814:ac499922 ARRAY /dev/md3 level=raid1 num-devices=2 metadata=0.90 UUID=3895ca46:c1526588:d48acd7e:c153aa83 ARRAY /dev/md4 level=raid1 num-devices=2 metadata=0.90 UUID=ebd4920f:b46c1f18:2eced24a:a21ca861 ARRAY /dev/md2 level=raid1 num-devices=2 metadata=0.90 UUID=048e8198:5d6d9682:d3a1e5c3:d475ad80 ARRAY /dev/md0 level=raid1 num-devices=2 metadata=0.90 UUID=d89ec2de:079d4be5:e00ee8f5:fcb19188 I want to carve off 500MB from md4 to make a new partition (for an AFS cache). I haven't touched mdadm or any other disk partitioning tools in years. md4 is 50GB and less than 10% used. What's the easiest way of doing this?

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  • Trace redirect loop

    - by Michel Krämer
    I have a large PHP application. After I changed some settings I get a redirection loop (i.e. the browser is redirected to the same page over and over again). The problem is that I don't know which command (which line in which PHP file) in this application causes the redirect. Is there a way to trace calls to the header() function? Or - even better - is there a way to trace redirects in PHP? Thanks in advance, Michel

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  • How to increase hard drive transfer speed

    - by atif089
    This is my motherboard GA-M61PME-S2 (SATA upto 3.0 Gbps) and This is my Hard Disk Samsung hd502hi Capacity 500 GB Cache 16MB Disks / Heads 1 / 2 Interface SATA 3Gb/s Spindle Speed 5400 RPM Sustained Data Rate OD 100 MB/s Average Seek 8.9 ms Average Latency 5.56 ms Data Transfer Rate 300 MB/sec Weight 470 grams Power: Idle / Seek / R-W / Spin-up 3.9W / 4.8W / 5.1W / ~24W Acoustics (sound power) 2.2 / 2.7 Bel (idle / quiet seek / performance seek) When I copy things from one partition to another they transfer at a maximum of 30 MBps. However the drive supports upto 300 MBps right ? How do I increase the transfer speeds? P.S - Using Windows XP, All partitions are NTFS.

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  • Python mechanize to follow image links?

    - by Shark
    mechanize's Browser class is great and it's follow_link() function is great too. But what to do with this kind of links: <a href="http://example.com"><img src="…"></a> Is there any way to follow such links? The text attribute of this type of links is simply '[IMG]', so AFAIK, there is no way to differentiate such links. Any help would be appreciated.

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  • Yum install in chroot directory

    - by pulegium
    I'm trying to install the Base group on a mounted volume. Here's the custom yum.conf that I'm using: [main] cachedir=/var/cache/yum/ debuglevel=2 logfile=/var/log/yum.log exclude=*-debuginfo obsoletes=1 gpgcheck=0 reposdir=/dev/null [base] name=Fedora 13 - i386 baseurl=file:///media/Fedora\ 13\ i386\ DVD/ enabled=1 [updates] name=Fedora 13 - i386 - Updates baseurl=http://mirror.sov.uk.goscomb.net/fedora/linux/updates/13/i386/ enabled=1 When I run # yum -c yum.conf --installroot=/mnt groupinstall Base I would expect yum to install everything under /mnt But it keeps on saying: [...] Package irda-utils-0.9.18-10.fc12.i686 already installed and latest version Package time-1.7-37.fc12.i686 already installed and latest version Package man-pages-3.23-6.fc13.noarch already installed and latest version Package talk-0.17-33.2.4.i686 already installed and latest version Package pam_passwdqc-1.0.5-6.fc13.i686 already installed and latest version [...] I tried rpm --base=/mnt --initdb and then use rpm to install fedora-release (which worked and installed the package under /mnt) But yum keeps on saying that all packages are installed. Any ideas?...

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  • Setting up a Windows Server 2008 R2 DC + Fileserver : native or virtual?

    - by user126890
    I want to deploy a new DC + Fileserver using Windows Server 2008 R2 SP1 Standard Edition on a Dell PowerEdge R410 and iSCSI storage for a small business (~30 people). Should I install the system native on the server or use a virt layer? I don't have a budget for virtualization so i gotta go with something free... What's a better working routine, taking snapshots of vm's or taking backups (Acronis/CloneZilla) of systems? If I use a virt system, I need a GUI for some people in the business to reset the system to a earlier state in emergency situations. I wanted to install phpVirtualBox once but never finished, is it suitable in a productive environment? server specs: Intel Xeon E5620 CPU (2,40GHz, 4C, 12MB Cache) 8GB RAM Dual Rank LV RDIMMs 1333MHz 2x 1TB SATA 7,2K 3,5, RAID1

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  • Why would the IIS UrlRewrite module continue redirecting requests after the rule is removed?

    - by Jon Norton
    Our application uses the IIS UrlRewrite module to temporarily redirect requests during upgrades to a maintenance site. We have seen a few instances where even though the redirect rule has been removed, the server continues to redirect all requests according to the removed rule. There does not seem to be any pattern with this, and has only occurred once or twice. We have taken the following steps to try and determine the cause of this behavior. Verified that the original rule was a 307 temporary redirect Requested the application from machines that had never requested it before Used a different browser Added and removed a dummy rule from the IIS management console Checked the http kernel cache using netsh http show cachestate Modified the applicationHost.config file by hand (the rule was not still in the file, we just added a superfluous space) In the past when this has happened, we have been able to restart IIS and it solves the problem but that is not always an option and we really want to figure out what the root cause is. How or why would UrlRewrite be caching the response and not responding to configuration changes?

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  • powweb and cloudflare

    - by sonill
    i am using powweb as hosting provider and cloudflare as free cdn. Its been few weeks since my website is down and it says "website down, no cache version available". And to add more to it, I cannot access powweb or any website hosted from powweb from my ISP connection. So i am facing trouble solving my cloudflare issue. I just wanted to know if the problem I am facing is from cloudflare side or powweb side. Some time i can access my website from my end but my friend in another country says its down for days. So is there any suggestion guys?? thank you

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  • layout analysis of text based pdf without ocr

    - by fastrack
    Before recognizing a pdf, OCR software do document layout analysis to determine which parts are texts, tables or images, as shown in the picture below. ![papercrop]http://cache.gawkerassets.com/assets/images/17/2011/07/papercrop.jpg I want to use some parts of the text while leaving out the others. So having a software marking those zones comes in handy. Papercrop does a decent job, but it has a bug of now showing some of the text in the pdf file. And OCR software can also do layout analysis, marking out "zones" which I can add or delete. But you have to OCR to do that. Since my pdfs are already text based, I don't want to waste so much time OCRing. So my question is, is there any software that automatically mark out those zones and let me manually manipulate them, without having to OCR? Thanks! Waiting for your help.

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  • Crossdomain settings in Google Chrome

    - by jAndy
    Hi Folks, I'm wondering, in IE & Firefox you're able to setup the browser, to allow cross-domain calls. I can't find any option in chrome for that (actually, there are in general not too much options at all...) are there any about:config like things? Kind Regards --Andy

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