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• IE cannot download file with unicode pathname

  - by MM

  I have a web-app that allows users to upload and download image files by pressing buttons on a web page. A user of this page is reporting that IE 7 and 8 fail to download files when the files have Unicode pathnames. IE prompts the user with a dialog stating: "Internet explorer cannot download (file) at (webserver).". Unfortunately I have not been able to reproduce the problem using these versions on my machine. My question is, what could cause this, and how can I prevent it from happening? I have read about problems with cache control (I currently have it set to no-cache); however, I am not using HTTP-S, and the problem only occurs with file-names containing Unicode characters.

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• How to track conversion rate (clicks to sales) from an internal advertising system?

  - by Ed Woodcock

  I am currently writing an interal advertising system for a company client's website, where the adverts will only be seen by internal users, and all transactions take place internally to the site (i.e. the adverts are for member-only content available on the site). Does anyone have any recommendations as to the best way to track the conversion rate of these adverts (i.e. views:clicks:sales)? EDIT I'm not looking for a 'Why don't you use google analystics'-type answer, I'm looking into possible architecture outlines, i.e. a 'why don't use store a guid in a cache temporarily and see if it ties to the advert' kind of answer. /EDIT In a previous job I did something based on an internal cache, which simply did view:click tracking, however the addition of the sales rate makes this task more complex, especially if we take into account the idea that someone may click through to an advert and not purchase immediately. Cheers, Ed (N.B. I'm leaving this purposely vague in order to (hopefully) get some answers that provide ideas I've yet to have thought of by coming at the problem from a different angle)

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• Rails gives wrong headers after upgrade 2.3.5 -> 2.3.8

  - by macsniper

  I just upgraded from rails 2.3.5 to rails 2.3.8, but now my redirects are not working properly. I get the following as the response HTTP Headers: HTTP/1.1 302 Moved Temporarily Date: Wed, 02 Jun 2010 09:40:39 GMT Content-Length: 93 Content-Type: text/html whereas I got previous: HTTP/1.1 302 Moved Temporarily Connection: close Date: Wed, 02 Jun 2010 09:41:18 GMT Set-Cookie: _session_id=<correct id>; path=/ Status: 302 Found Location: <correct url> Cache-Control: no-cache Server: Mongrel 1.1.5 Content-Type: text/html; charset=utf-8 Content-Length: 93 Anyone knows how to fix this? Despite the fact that the redirect is not working, the login-cookie is not set too (but I think, this is both related somehow). I have already tried to override redirect_to in order to set response.headers['Location'] etc., but they did not appear in the response.

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• When is a Transient-scope object Deactivated in Ninject?

  - by nwahmaet

  When an object in Ninject is bound with InTransientScope(), the object isn't placed into the cache, since it's, er, transient and not scoped to anything. When done with the object, I can call kernel.Release(obj); this passes through to the Cache where it retrieves the cached item and calls Pipeline.Deactivate using the cached entry. But since transient objects aren't cached, this doesn't happen. I haven't been able to figure out where (or who) performs the deactivation for transient objects. Or is the assumption that transient objects are only ever activated, and that if I want a deactivateable object, I need to use some other scope?

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• Sharing data between two instances in a load balanced java web application

  - by rabbit

  I want to cache data in a java web application deployed on multiple instances. We are using spring 2.5.6. What is the easiest caching library to configure and use with spring? I have heard of EH Cache, but the configuration is too cumbersome. The requirement is that a spring scheduler will run and set some flags. These flags are accessible from all load balanced instances. But since the scheduler runs only on one instance the flag is set only on that jvm. So how do i make these updated flag values available to all load balanced instances?

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• which sql query is more efficient: select count(*) or select ... where key>value?

  - by davka

  I need to periodically update a local cache with new additions to some DB table. The table rows contain an auto-increment sequential number (SN) field. The cache keeps this number too, so basically I just need to fetch all rows with SN larger than the highest I already have. SELECT * FROM table where SN > <max_cached_SN> However, the majority of the attempts will bring no data (I just need to make sure that I have an absolutely up-to-date local copy). So I wander if this will be more efficient: count = SELECT count(*) from table; if (count > <cache_size>) // fetch new rows as above I suppose that selecting by an indexed numeric field is quite efficient, so I wander whether using count has benefit. On the other hand, this test/update will be done quite frequently and by many clients, so there is a motivation to optimize it.

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• In Django/python, how do I set the memcache to infinite time?

  - by alex

  cache.set(key, value, 9999999) But this is not infinite time...

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• How often does memcache on Google AppEngine lose data?

  - by Freed

  Memcache in general and on AppEngine in specific is unreliable in the sense that my data may be deleted from the cache for whatever reason at any point in time. However, in some cases there might be cases where a small risk may be worth the added performance using memcache could give, such as updating some data in memcache that gets saved periodically to some other, more reliable storage. Are there any numbers from Google that could give me an indication of the actual probability that a memcache entry would be lost from the cache before its expiration time, given that I keep within my quotas? Are there any reasons other than hardware failure and administrative operations such as machines at the data centers being upgraded/moved/replaced that would cause entries to be removed from memcache prematurely?

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• .NET project: unified wrapper for object databases.

  - by Steve

  I am considering doing a project which would provide unified API and tools (import/export, etc.) for object databases (e.g. Caché, Objectivity) for .NET. It would provide: schema generation from CLR classes, generation of C# classes from given OODBMs schema, API for deleting, creating and updating objects, Linq provider, API for calling object's methods on DB server, some of OODBMs provide some kind of SQL support, so API for this, providers for Caché and Objectivity in first phase. Does any project which implements any of above exist? Can this be achieved with NHibernate dialects? or are OODBMs so different than RDBMs that it worth doing separate framework for them?

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• Xenserver 5.6 SR_BACKEND_FAILURE_47 no such volume group, but it is there

  - by Juan Carlos

  I've looked everywhere (Google, here, a bunch of other sites), and while I have found people with similar problems, I couldn't find a single one with a solution to this. Last night our xenserver 5.6 box corrupted the /var/xapi/state.db, and I couldn't fix the xml, no matter what I did. After a good hour fiddling with the file, I figured it would be faster to just reinstall. The server had one 2tb hard drive running Xen and its VMs, and since Xen's install said it would erase the hard drive it was installed on, I plugged a new harddrive and installed Xen on it, without selecting any hard drives for storage. I Figured I could make it happen after install, using the partition on the old harddrive with all my VMs on it. After instalation finished and the system booted I did: #fdisk -l found the old partition at /dev/sda3 #ll /dev/disk/by-id found the partition at /dev/disk/by-id/scsi-3600188b04c02f100181ab3a48417e490-part3 #xe host-list uuid ( RO) : a019d93e-4d84-4a4b-91e3-23572b5bd8a4 name-label ( RW): xenserver-scribfourteen name-description ( RW): Default install of XenServer #pvscan PV /dev/sda3 VG VG_XenStorage-405a2ece-d10e-d6c5-ede2-e1ad2c29c68d lvm2 [1.81 TB / 204.85 GB free] Total: 1 [1.81 TB] / in use: 1 [1.81 TB] / in no VG: 0 [0 ] #vgscan Reading all physical volumes. This may take a while... Found volume group "VG_XenStorage-405a2ece-d10e-d6c5-ede2-e1ad2c29c68d" using metadata type lvm2 # pvdisplay --- Physical volume --- PV Name /dev/sda3 VG Name VG_XenStorage-405a2ece-d10e-d6c5-ede2-e1ad2c29c68d PV Size 1.81 TB / not usable 6.97 MB Allocatable yes PE Size (KByte) 4096 Total PE 474747 Free PE 52441 Allocated PE 422306 PV UUID U03Gt9-WtHi-8Nnu-QB2Q-c7BV-CO9A-cFpYWW # xe sr-introduce name-label="VMs" type=lvm uuid=U03Gt9-WtHi-8Nnu-QB2Q-c7BV-CO9A-cFpYWW name-description="VMs Local HD Storage" content-type=user shared=false device-config=:device=/dev/disk/by-id/scsi-3600188b04c02f100181ab3a483f9f0ae-part3 U03Gt9-WtHi-8Nnu-QB2Q-c7BV-CO9A-cFpYWW # xe pbd-create host-uuid=a019d93e-4d84-4a4b-91e3-23572b5bd8a4 sr-uuid=U03Gt9-WtHi-8Nnu-QB2Q-c7BV-CO9A-cFpYWW device-config:device=/dev/disk/by-id/scsi-3600188b04c02f100181ab3a483f9f0ae-part3 adf92b7f-ad40-828f-0728-caf94d2a0ba1 # xe pbd-plug uuid=adf92b7f-ad40-828f-0728-caf94d2a0ba1 Error code: SR_BACKEND_FAILURE_47 Error parameters: , The SR is not available [opterr=no such volume group: VG_XenStorage-U03Gt9-WtHi-8Nnu-QB2Q-c7BV-CO9A-cFpYWW] At this point I did a # vgrename VG_XenStorage-405a2ece-d10e-d6c5-ede2-e1ad2c29c68d VG_XenStorage-U03Gt9-WtHi-8Nnu-QB2Q-c7BV-CO9A-cFpYWW cause the VG name was different, but pdb-plug still gives me the same error. So, now I'm kinda lost about what to do, I'm not used to Xen and most sites I've been finding are really unhelpful. I hope someone can guide me in the right way to fix this. I cant lose those VMs (got backups, but from inside the guests, not the VMs themselves).

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• HP ACU shows parity initialization failed (with screenshot)

  - by lbanz

  I put in a new drive due to a hard drive failure. When the rebuild got to 100%, the controller fails and I need to reboot the server to bring it online. I had to do this about three times and it eventually finished rebuilding. But I found that it says parity initialization status failed. I've left it for a few hours but it didn't seem to reinitialize. Then I ran the insight online diagnostic tools and it reported the disk that I put in reached read/write error threshold. So I'm beginning to think that the brand new disk I put in is faulty. Before I put in the disk, the parity initialization was at a finished state. Should I replace the new disk I put in? I'm very worried as I think the parity is broken. Or is there a way to kick start the initialization process?

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• Windows 7 can't copy file - Error 0x800700DF: The file size exceeds the limit allowed and cannot be

  - by JJGroover

  Any attempt to copy files larger than about 40 MB from a network share (a SAN running open filer / Samba) to my local machine running Windows 7 always results in the following error and the copy fails: Error 0x800700DF: The file size exceeds the limit allowed and cannot be saved. I've tried copying to my C: drive and a USB drive with the same results. Smaller files copy just fine. Clearly 40 MB is not that big of a file so I'm assuming it is some buggy interaction between windows 7 and Samba perhaps. Google has so far turned up nothing. Can anyone point me in the right direction?

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• Ideal backup appliance for backup software like Bacula?

  - by Ricket

  I'm at a small company and we (the IT department of two) manage <100 client computers and a handful of servers. Currently we're using a company's appliance to handle backup; it does a small backup every night and a full backup every weekend, and a guy comes on Wednesday to take an offsite backup drive (and gives back last week's drive to swap with it). The backup is done only on the servers' hard drives, because our client computers and employees make sure not to store anything worthwhile on their own computers. So it's a pretty simple situation. Lately this system, mainly the appliance, has been having problems, so we are looking for an alternative. I'm researching other companies but also looking into what we might expect from trying to do this ourselves. There will undoubtedly be a large learning curve, but hey, that's what serverfault is for, right? :) So anyway I was looking at Bacula. Feature list sounds great, documentation is plentiful, but it's only software. So my question is, what is the ideal backup server to run the Bacula server software on? And not only the server but other related appliances. Our current backup appliance uses only hard drives, not tape drives. It has several plugged into it at one time, in hotswap bays on the front of the machine. I couldn't help but notice though, it's hardly more than Windows XP with hard drive bays, a PCI eSATA card (which connects to another appliance extension piece with 2 more bays), and their software. Since the company will take back their appliance if/when we cancel with them, where can I go to configure a server with these kinds of things? And should I consider switching to tape drives? What other concerns should I be thinking about when I pick out hardware for a backup server? Maybe I'm being naive, I'm sure Dell (and any other computer company) sells them in the small business section of their website, but I wanted to make sure that there's not some other more recommended place that other companies are getting their hardware from, and that I don't need anything special for Bacula.

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• Need HP recovery partition info

  - by ggambett

  I'm configuring a new HP Pavillion DV4 with a 320 GB disk. I made the recovery DVDs, then did a couple other things (including deleting the recovery partition), and finally decided to restore the system. Unfortunately, the recovery process fails; the three DVDs are read (the recovery program says "Reformatting the Windows partition" and "Copying files required to restore the hard drive") but after it finishes reading the 3rd, and the progress bar reaches 100%, it fails with error 0xe0f00013 - Googling it didn't return anything at all. I'm afraid this may be because I deleted the partitions. So, I'm kindly asking for one of the following, in order of preference, from a HP Pavillion DV4 with a 320 GB hard disk or a similar enough one : 1) A dump of the MBR 2) The type and size of all the partitions in a "new" system so I can try to make a partition table resembling the original one. BTW, I thought the recovery DVDs were supposed to work even if the entire disk was wiped - isn't that the case? Thanks!

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• Unable to format disk: 'The system cannot find the file specified'

  - by ACarter

  I have a USB flash drive, which I may have mucked up, so I used DISKPART's CLEAN to clean it up. I created a simple volume, and tried to format it. (This is all using Windows' disk management.) I was told The system cannot find the file specified. So I tried using DISKPART (as an admin): DISKPART select volume 9 Volume 9 is the selected volume. DISKPART format recommended DiskPart has encountered an error: The system cannot find the file specified. See the System Event Log for more information. DISKPART As you can see, no luck. When I plug the drive in, the computer makes a beep noise as though it has recognised something, but nothing appears in My Computer How can I format the disk so I can use it again?

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• How to add a local file to trusted zone in IE8?

  - by Raghu Dodda

  I want to add a file on my local drive (C:\something.html) to the Trusted Zone in IE8 (my OS is Windows Server 2003). The Add Sites Dialog box, does not seem to take entries for files on the local drive. I have tried: file://C:\something.html file:\\localhost\c$\something.html I have seen other solutions (on superuser and elsewhere) such Mark of Web, that allow your local file to be treated as if it were part of the internet zone, but I want to add my file to the Trusted Zone. How can I do this? Thanks.

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• HP PDX Laptop and blu-ray region, HP MediaSmart problem

  - by Lasse V. Karlsen

  I have a laptop here, a HP HDX 16 EO1000 with a Blu-Ray drive. Installed on the machine is a software package called HP MediaSmart, which presumably can play Blu-Ray movies. However, when inserting a BD disk and starting HP MediaSmart, it comes up with a warning screen and the following message: This disc has been coded for Region B only and will not play in this machine. Please eject this disc and play on a Region B player. The question is, can we change this region? The machine is in europe, which is the B-region, but apparently the drive, or software, or both, is set to some other region. I don't even know where to find the current setting so if anyone knows, please post an answer with some information of where to look.

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• Windows 7 installation too slow

  - by BizApps

  I have P.C with Emaxx Motherboard : emx-a55gm-icafe with AMD dual core processor,500 GB WD Sata HDD,2GB of RAM,samsung dvdr,windows 7 dvd which is all brandnew. When i was trying to install windows 7 ulitmate on my P.C it really takes hours on setting up, which is really rare and i'm still hopeless getting a solution for this.But I don't have any issue installing windows 7 on my HP laptop that can be finished within just more than 20minutes. There is same issue that ive search in google and disabling the floppy disk drive in BIOS is their solution, but my problem is, Emaxx icafe doesnt have floppy disk drive setting on bios. I already change ACHI/IDE Support but i have still no luck. Is there any solution for this? Thanks in Regards

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• vgcreate --> "Command failed with status code 5." what does this mean?

  - by erik

  i'm playing around w/ LVM on a centos domU in a xen-based vps. I'm in rescue mode and I've created one physical volume (pvcreate /dev/xvda1) for my entire drive, which is formatted as LVM. i'm now trying to create a volume group using vgcreate main /dev/xvda1, but it's returning "Command failed with status code 5.". I've been unable to find an explanation for this error code. does anyone know what it means? for what it's worth, my goal is to create multiple logical volumes on my drive using lvm. thanks

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• Migrate SBS 2008 with Exchange 2007 to new hardware

  - by MikeT505

  Hello, We have run out of hard disk space on our existing Small Business Server 2008 and simply wish to upgrade both of the hard drives (currently raid 1) - without too much hassle. My main concern is how to copy across the embedded version of Microsoft Exchange 2007. Is there a simple way to copy all the data across and upgrade? Or is it best to backup and do a clean install? - The difficulty is that it's the same server, so we can't replicate mailboxes for exchange. Any hints or tips welcomed!?

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• Failed upgrade of PHP on Ubunutu 12.04, error: Sub-process /usr/bin/dpkg returned an error code (1)

  - by DanielAttard

  I just tried to upgrade my version of PHP on Ubuntu 12.04 and now I have messed it up. First I did this: sudo add-apt-repository ppa:ondrej/php5-oldstable Then I did this: sudo apt-get update Then finally I did this: sudo apt-get install php5 And now I am getting an error message about Sub-process /usr/bin/dpkg returned an error code (1) What have I done wrong? How can I fix this problem? Thanks. Here are the errors received: Do you want to continue [Y/n]? Y debconf: DbDriver "config": /var/cache/debconf/config.dat is locked by another process: Resource temporarily unavailable Setting up libapache2-mod-php5 (5.4.28-1+deb.sury.org~precise+1) ... debconf: DbDriver "config": /var/cache/debconf/config.dat is locked by another process: Resource temporarily unavailable dpkg: error processing libapache2-mod-php5 (--configure): subprocess installed post-installation script returned error exit status 1 No apport report written because MaxReports is reached already Setting up php5-cli (5.4.28-1+deb.sury.org~precise+1) ... debconf: DbDriver "config": /var/cache/debconf/config.dat is locked by another process: Resource temporarily unavailable dpkg: error processing php5-cli (--configure): subprocess installed post-installation script returned error exit status 1 No apport report written because MaxReports is reached already dpkg: dependency problems prevent configuration of php5-curl: php5-curl depends on phpapi-20100525+lfs; however: Package phpapi-20100525+lfs is not installed. Package libapache2-mod-php5 which provides phpapi-20100525+lfs is not configured yet. Package php5-cli which provides phpapi-20100525+lfs is not configured yet. dpkg: error processing php5-curl (--configure): dependency problems - leaving unconfigured No apport report written because MaxReports is reached already dpkg: dependency problems prevent configuration of php5-gd: php5-gd depends on phpapi-20100525+lfs; however: Package phpapi-20100525+lfs is not installed. Package libapache2-mod-php5 which provides phpapi-20100525+lfs is not configured yet. Package php5-cli which provides phpapi-20100525+lfs is not configured yet. dpkg: error processing php5-gd (--configure): dependency problems - leaving unconfigured No apport report written because MaxReports is reached already dpkg: dependency problems prevent configuration of php5-mcrypt: php5-mcrypt depends on phpapi-20100525+lfs; however: Package phpapi-20100525+lfs is not installed. Package libapache2-mod-php5 which provides phpapi-20100525+lfs is not configured yet. Package php5-cli which provides phpapi-20100525+lfs is not configured yet. dpkg: error processing php5-mcrypt (--configure): dependency problems - leaving unconfigured No apport report written because MaxReports is reached already dpkg: dependency problems prevent configuration of php5-mysql: php5-mysql depends on phpapi-20100525+lfs; however: Package phpapi-20100525+lfs is not installed. Package libapache2-mod-php5 which provides phpapi-20100525+lfs is not configured yet. Package php5-cli which provides phpapi-20100525+lfs is not configured yet. dpkg: error processing php5-mysql (--configure): dependency problems - leaving unconfigured No apport report written because MaxReports is reached already dpkg: dependency problems prevent configuration of php5: php5 depends on libapache2-mod-php5 (>= 5.4.28-1+deb.sury.org~precise+1) | libapache2-mod-php5filter (>= 5.4.28-1+deb.sury.org~precise+1) | php5-cgi (>= 5.4.28-1+deb.sury.org~precise+1) | php5-fpm (>= 5.4.28-1+deb.sury.org~precise+1); however: Package libapache2-mod-php5 is not configured yet. Package libapache2-mod-php5filter is not installed. Package php5-cgi is not installed. Package php5-fpm is not installed. dpkg: error processing php5 (--configure): dependency problems - leaving unconfigured No apport report written because MaxReports is reached already Errors were encountered while processing: libapache2-mod-php5 php5-cli php5-curl php5-gd php5-mcrypt php5-mysql php5 E: Sub-process /usr/bin/dpkg returned an error code (1)

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• Register a dll in Windows Server 2003

  - by Karee

  I'm trying to register some DLLs for a particular application but having some problems. The DLLs are stored in the application folder in the D: drive. I run cmd.exe, go to the D: drive and run regsvr32, but it gives me the error: "The was loaded, but the DllRegisterServer entry point was not found. This file cannot be registered." After searching for other solutions, I also tried copying the DLLs into the C:\WINDOWS\system32 folder and running regsvr32 directly there but that didn't work either. It gave me the same error. I'm not very familiar with Windows Administration, so I may need detailed instructions/explanations. Any help would be greatly appreciated! Thank you very much!

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• HP Recovery options: System Recovery not showing

  - by sha404

  I am using HP Pavilion dv4 notebook. Previously, there were following options in Recovery Manager(using f11 during boot): +System Recovery +Factory Restore +Minimized Image Recovery The System Recovery option allows me to restore only Operating system drive e.g. C:\ drive, keeping all other user (me) created hard drives intact. I made a set of recovery disk. Since then I don't see the System Recovery option in HP Recovery Manager. But all other options are still there. But when I use recovery disks that i created earlier, that option e.g. System Recovery is shown. But It's really boring and time consuming to use disks for recovery. So, what's the problem with internal HP Recovery Manager? Why isn't it showing that option?

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• How can I install the latest full version of Canon ZoomBrowser EX without the original CD?

  - by Sorin Sbarnea

  ZoomBrowser EX comes with Canon cameras. Canon software enigeering team did a really poor job analyzing how people are using the software: people do lose their x-year old CD or do not have it with them when travelling do not have a CD drive at all (very common nowdays) Canon updater from their website does not allow you to install the software if it does not find the original CD in the drive. The question is how do I trick the installer to run on a computer and install the product that I payed for. Currently the latest version is 6.5.1.15 and you can download the updater from Canon website. In fact the updater is just the full installer but it doesn't allow you to install if it doesn't find a previous install or the original CD. Note: In the past I used to save a registry file with registry keys used by it, loading it did allowed me to run the installer but now, with Windows 7 x64 it seams that it doesn't work anymore.

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• How to install Windows 7 onto software RAID-0

  - by Jay B

  I recently got a new laptop (Asus G73JH-A2) which has two identical hard drives in it. Unfortunately the motherboard does not have a RAID controller. What I would like to do is run the drives in a RAID-0 configuration to improve performance (plus get the extra capacity on one partition). I would like Windows installed onto the striped volume (RAID 0). I have spent some time using diskpart to create a striped volume across the two drives, however when I go to install windows and select the volume it will not let me select 'Next' giving the error "Windows cannot be installed to this hard disk space. The partition contains one or more dynamic volumes that are not supported for installation." I'm hoping theres a step that I am missing that will allow me to install windows on a striped volume. Any ideas?

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