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• Microsoft Excel 2007 constantly calculating sheets

  - by acseven

  I believe this happening for two weeks now: Excel 2007 (on Windows XP) is acting funny on my computer; any medium sized sheet with some formulas in it takes a significant amount of time recalculating. I can see this because the "calculating: 2 processors xx%" message was almost unseen before and now it appears on most operations like calculating a formula (on one cell), saving, previewing, etc. If the sheet is complex (lots of formulas) I have to disable automatic calculations because excel renders as unusable - it hangs for a really long time, measureable in minutes. Any idea on what may be causing this? ps: this is a Core2 Duo computer with 2 Gb of RAM

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• Create Google Maps screenshots at regular intervals

  - by Dave Jarvis

  Background People are concerned that building a pipeline to the West Coast of Canada will increase the number of oil tankers, thus increasing the probability of a major oil spill, thereby creating an environmental catastrophe. The AIS Live Ships Map website captures real-time Marine Traffic updates using a Google Maps interface. While it is possible to obtain data from an AIS data feed, often the feeds are either pay-for-use, or otherwise encumbered with license restrictions. Problem The AIS Live Ships website presents a map in the browser: The map above has had its location interactively changed to focus on the area in question: the northern straight of Vancouver Island. Question How would you create a service that captures the map every 30 minutes and that could run, with neither user-intervention nor a significant memory footprint, for a few years? Idea #1 Create a virtual machine. Install and run a light-weight browser. Use Shutter to take captures at regular intervals. Idea #2 Use Python's Ghost Webkit to automate the captures. Thank you!

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• What are the challenges when my enterprise desires to move the processing component of an applicatio

  - by Berkay

  Assume that i have an enterprise accounting application that consists of a front-end interface, a processing tier, and a back-end database. This is an application that contains private business data, and thus is traditionally run in a secure private network environment within the enterprise. What are the challenges that appear when my enterprise desires to move the processing component of this application to a cloud computing data center in order to achieve greater scalability or to reduce IT costs ? Pls note: do i have to make significant changes to my own infrastructure to enable external access to formerly private resources? do i have to modify the application code to handle new network topology ? thanks, if you give your answers in a simple manner, really appreciated.

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• Do you have any additions or alterations to this list of popular audio formats?

  - by roja

  All, I am trying to compile a list of common audio file formats used in both personal storage and peer transmission. I have compiled the following list, do you think that there are any significant formats missing? Are any of them not actually common formats? Any advice/alterations are highly useful. advanced audio coding, apple lossless audio file, atrac3 audio file, atrac audio file, audio interchange file format, core audio file, free lossless audio codec file, mpeg 1 audio layer 3, mpeg 2 audio, mpeg 4 audio book file, musical instrument digital interface, ogg vorbis compressed audio file, open media framework file, real audio, real audio media, waveform audio file format, windows media audio Kind regards, Roja

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• What desktop chipsets support AMD's Rapid Virtualization Indexing?

  - by netvope

  Rapid Virtualization Indexing (RVI) is a hardware virtualization feature that can potentially give significant performance improvement. Intel's equivalent is Extended Page Tables. See http://en.wikipedia.org/wiki/Rapid_Virtualization_Indexing for more details. My question is: Does RVI require motherboard or chipset support? If yes, what desktop chipsets support it? I've ordered a Phenom II CPU (which supports RVI) but I haven't bought the motherboard. I'll install XenServer or VMware ESXi (which both support RVI) on the new computer.

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• Unable to boot to Ubuntu. Inconsistency in disk, X server didn't start. Illegal blocks in Inode

  - by becomingGuru

  I am unable to boot into my Ubuntu system. First I get that fsck died with exit status 4 Then I try to do it manually as prompted and I get that an Inode has illegal blocks and asked to clear it. Upon googling, I found that is because my HD has some problems I booted via Live cd and took a dd of the entire Ubuntu on an external HDD just in case. Is it safe to clear all the illegal blocks. How do I safely restore my environment if I replace my HD. Is there any thing i can do in the meanwhile to continue to use my laptop without significant loss of data. Perhaps a related error, the x server fails to start

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• Windows Swap (Page File): Enable or Disable?

  - by d03boy

  From my personal experience I've noticed that disabling the page file in Windows XP has given me, in general, the most speed gain out of any other software change I can make. Obviously this has to be done when a significant amount of RAM is available. Typically I find that it works nicely with +2GB of RAM. The only issues I've ever really had were loading up Adobe Photoshop. Is this really a speed improvement or am I imagining it? Note: In order to actually turn it off, you must not just set it to 0MB, but disable it. Otherwise Windows will just expand it when it needs to in order to meet its needs.

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• Hardware upgrade: Windows 7 bluescreens, Vista loads

  - by Daniel Schaffer

  I just did a fairly significant hardware upgrade while keeping my hard disks. The old system was a dell Optiplex 745 with an Intel Core 2 duo, LGA 775. The new system is custom built, Intel i5 750. I know you're supposed to do a clean install with a hardware upgrade like this, but I'd had success in the past doing the stealth hardware upgrade like this, so I figured I'd give it a shot. Windows 7 Ultimate 64 bit gets through the loading screen and immediately blue screens and reboots. Windows Vista Home Premium 32-bit, which I have on an old hard drive from an AMD box (!!) loads up fine. I ran through the windows memory checker just to be sure, and my memory is fine. So, is the BSOD the result of some sort of protection mechanism specific to Windows 7? Is there any hope of salvaging that install?

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• Why would a terminal server be kicking users off after about 5 minutes?

  - by Matt

  I have a terminal server that was restored from an old 1U server to an IBM HS20 Blade running ESXi. The restore was using shadow protect hardware independent restore. All appeared to be functioning well but we're finding that users are being periodically kicked off after around 5 minutes or so. The interesting thing is it doesn't appear to be a simple disconnect but the whole session has gone like it was logged out. There is nothing significant in the event log, and certainly nothing from terminal services that is logged. I've also checked the client computers and from the client computers logged into our other terminal server and there wasn't any issues there. It doesn't appear to be network related. Any ideas?

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• Micro sound breaks/interrupts on Windows 7

  - by cand

  Hello all, I've been experiencing strange behavior recently. When listening to mp3 or watching movie or whatever that uses sound, I get micro breaks in sound. It's like it hangs or cuts a fragment for about 0.5s. When I start OS, it's ok, but as time passes it gets worse, to the extent that music is unlistenable being interrupted every 2 seconds. I haven't found any relevance between this behavior and hardware usage, I don't think it's directly related to HDD (or it might be but with significant delay). I have updated soundcard drivers and it didn't help a lot. My system is Windows 7, computer is simple HP laptop, nx7300-Ru374ES with WD Caviar Scorpio Blue hard drive inside and integrated soundcard on it (I can check the model later if it's important). Did anybody encounter such problem ? Maybe it's a common thing on Windows 7 or someone knows how to solve it? Thanks in advance.

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• Using a non-validated SED on a Dell R720

  - by a coder

  We were given a Dell R720 a couple years ago, and the machine currently has standard 300GB 3.5" SAS 15k drives. Our RAID controller is a Perc H710. We need to update our disks to FIPS 140-2 certified SED. According to Dell, they have only one tested/validated FIPS SED for this machine/controller, but it is a 7200rpm 3.5" unit. I'm showing that Dell offers a 600GB 15k FIPS SED in 3.5" configuration (Dell part number 342-0605), but they say they haven't validated or tested to know if it works. They informed us that we would not void our warranty in using this non-validated drive. How likely is it that our R720 with H710 controller will work with the non-validated drive? Are there significant differences in how drive manufacturers build SED that would prevent them from working consistently across different controllers?

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• What email providers have extremely high reliability and robust SLAs?

  - by Benjamin Manns

  My dad is a professor who does part-time law practice. He had been using his university email address for professional correspondence, when he found out that the university had permanently lost 16 business-related emails in their spam filter (with no apology, notification, or compensation). What I am looking for now is an email provider (preferably with Exchange, but not required) with very high reliability and a SLA that is basically an insurance policy. I have looked at Google Apps's SLA, but this will not suit. I am looking for a provider who will take $X per month in registration fees, and will: Alert me when there is any downtime. Promptly fix the issue Pay me a fee ($Y) whenever there is downtime. I want a significant, contractual reason for them to be diligent in their service. Free service for me is not enough.

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• How to install the TRIM RAID update for the Intel storage controller?

  - by Mike Pateras

  I just found this article, that says that Intel now supports TRIM for SSDs when the Intel storage controller is in RAID mode. It links to this download page. I'm pretty excited about that, but I'm a little confused. There seem to be two sets of drivers, an executable and something that's bootable. I ran the executable. Is that just to apply the drivers to my system now, and are the bootable drivers so that if I re-format, I won't have to re-run everything? Do I need to do both? And is there a way to check if it worked? I'm running an i7 in Windows 7 (ASUS P6T Deluxe Motherboard) with RAID 0, if that's significant.

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• inodes and tree-depth in ext2

  - by David Hagan

  I have an ext2 filesystem with a maximum number of inodes per directory (somewhere around 32k), and also a maximum number of inodes in the entire filesystem (somewhere around 350m). Because I'm using this filesystem as a datastore for a service that has in excess of 32k objects, I'm distributing those objects between multiple subdirectories (like a dictionary separates A-K and L-Z). My question is this: Is there any significance to the tree depth when I'm building these inodes? Is there a significant difference or limitation that's going to affect my service if I choose "/usr/www/service/data/a_k/aardvark" over "/data/a_k/aardvark"?

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• VPS for Glassfish

  - by Harry Pham

  Our small startup company plan to deploy a web application on Glassfish, I and wonder if some of the experience user out there can answer me couple question. When I shopping for server, I usually look at RAM amount, as GF does required good amount of RAM to run, below are the two sites with significant price different for the same amount of RAM. I wonder why?? Godaddy: http://www.godaddy.com/hosting/virtual-dedicated-servers.aspx?ci=9013 Versus http://entic.net/Servers Does below plan from Godaddy consider good to run GF application. OS: Linux CentOS • RAM: 4 GB • Storage: 60 GB • Bandwidth: 2,000 GB/mo Our web application is a social network, expected to have 2000-4000 users to start with

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• Best filesystem choices for NFS storing VMware disk images

  - by mlambie

  Currently we use an iSCSI SAN as storage for several VMware ESXi servers. I am investigating the use of an NFS target on a Linux server for additional virtual machines. I am also open to the idea of using an alternative operating system (like OpenSolaris) if it will provide significant advantages. What Linux-based filesystem favours very large contiguous files (like VMware's disk images)? Alternatively, how have people found ZFS on OpenSolaris for this kind of workload? (This question was originally asked on SuperUser; feel free to migrate answers here if you know how).

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• Distributed, Parallel, Fault-tolerant File System

  - by Eddified

  There are so many choices that it's hard to know where to start. My requirements are these: Runs on Linux Most of the files will be between 5-9 MB in size. There will also be a significant number of small-ish jpgs (100px x 100px). All of the files need to be available over http. Redundancy -- ideally it would provide the space efficiency similar to RAID 5 of 75% (in RAID 5 this would be calculated thus: with 4 identical disks, 25% of the space is used for parity = 75% efficent) Must support several petabytes of data scalable runs on commodity hardware In addition, I look for these qualities, though they are not "requirements": Stable, mature file system Lots of momentum and support etc I would like some input as to which file system works best for the given requirements. Some people at my organization are leaning towards MogileFS, but I'm not convinced of the stability and momentum of that project. GlusterFS and Lustre, based on my limited research, appear to be better supported... Thoughts?

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• What equipment do real ISP's use?

  - by Allanrbo

  In a dormitory of 550 residents, people often mistakenly set up DHCP servers for the whole network by plugging in their private Wi-Fi routers wrongly. Also recently, someone mistakenly configured their PC to a static IP being the same as that of the default gateway. We use cheap 3Com switches at the moment. I know that Cisco switches support DHCP snooping to solve the DHCP problem, but that still does not solve the default gateway IP takeover problem. What sort of switch equipment do real ISP's use so their customers cannot break the network for the other customers? What we ended up doing In case anyone are courious, we ended up doing seperate VLANs for each user. And as a matter of fact, not just the 550 users, but for 2500 users (11 dorms). Here's a page describing the setup: http://k-net.dk/technicalsetup/ (the section "Transparent firewall using VLANs"). There was no significant load on the router server as I feared in one of the comments below. Even at 800Mpbs.

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• SCSI vs SATA? Is SCSI "actually" better?

  - by earlz

  Well, I was talking with a guy about servers the other day. I was a bit shocked whenever I asked him if there was any significant difference between SCSI and SATA and why he always uses SCSI. (note, I'm not sure if by SCSI he meant SAS) He told me that SCSI is always faster and that the drives are always more reliable.. I mean, this seems like a bold statement. He told me something about how SCSI will always be faster than SATA because the OS sends the SCSI (controller?) a request to get a file and it will build the file inside of the SCSI controller, instead of searching all over the disk.. which I do not understand how that would work, so I figure it is BS. SAS and SATA currently have equivalent data rate speeds.. Is there any true backing for his reasoning that SCSI is always faster and more reliable than SATA?

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• hung up troubleshooting packet discards

  - by Chris Satola

  I realize my question is generic, but hopefully someone may have some guidance for me. My network consists of Cisco switches. I am seeing a significant amount (upwards of millions of packets per day) transmit drops between two switches. One being a 3750 and the other a 3560. The peak throughput of this link is only upper 400Mbps, so it shouldn't be a bandwidth issue. At this point, I am sort of clueless where to look or what tools I can use to determine what packets are dropping and why. I can setup a SPAN port on that link and wireshark it, but I don't know if that could tell me anything. Does anyone have any suggestions? Thanks in advance.

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• mysql client fails to start on command line

  - by Mark Basmayor

  Hi, I have been using the mysql command line client a lot before but I suddenly start getting this error when I try to launch it. mysql: relocation error: mysql: symbol strmov_overlapp, version libmysqlclient_16 not defined in file libmysqlclient.so.16 with link time reference The only significant event that comes into my mind is updating from Ubuntu 9.10 to 10.4. I'm not sure if there's anything else that I did to mess it up. I tried uninstalling both the mysql server and mysql client like so but to no avail. sudo aptitude purge mysql-server-5.1 Any help will be much appreciated, thanks.

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• Two VPN (internet) connections rounting (win2003)

  - by tmp3128

  Here is my setup: - win2003 server (ISA installed) with 3 NICs:   1) internal network   2) ISP 1 (default) network (DHCP enabled)   3) ISP 2 (backup) network (DHCP enabled) - several "normal" PC within internal net - one "special" PC within internal net Both ISP 1 and ISP 2 provide access to internet and their resources thru their VPN connections. The goal is to enable all "normal" PCs to use internet from ISP_1's VPN connection and "special" should use only ISP_2's VPN connection. Futhermore all "normal" and "special" PCs should have access to several servers accesible only thru ISP_2's VPN connection. I have some thoughts how to achieve this but I want to be certain because everything should be configured as quickly as posible, avoiding significant downtime. windows-server-2003 isa routing vpn

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• What technical reasons exist for not using space characters in file names?

  - by Chris W. Rea

  Somebody I know expressed irritation today regarding those of us who tend not to use spaces in our filenames, e.g. NamingThingsLikeThis.txt -- despite most modern operating systems supporting spaces in filenames. Are there technical reasons that it's still common to see file names without (appropriate) spaces? If so, what are these technical reasons that spaces in filenames are avoided or discouraged, and in what circumstances are they relevant? The most obvious reason I could think of, and why I typically avoid it, are the extra quotes required on the command line when dealing with such files. Are there any other significant technical reasons?

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• replacement drive cage for power edge R710

  - by bumble_bee_tuna

  Hi I'm performance tuning a DB server its a Dell R710 there is a very significant I/O bottleneck. Unfortunately the server was purchased with the 6 x 3.5 inch sata configuration which doesn't give me the leeway I need to address the issue. Before going to DAS does anyone know if it is possible to purchase a replacement front drive enclosure ? I know the server is configurable with something like 12 or 16 2.5 inch drives and it appears to be modular ? I tired contacting dell but the offshore parts department reps are not very bright lol. Thanks.

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• Is it safe to run an operating system from an USB flash drive?

  - by Georg

  I've got a laptop that has a broken harddisk controller. Replacing the motherboard is quite expensive. I thought about buying a flash drive and installing & running the system from it. However, I'm concerned about some things. Speed: Are they fast enough for swap memory (I've got only 1GB RAM installed.) I'm considering buying 2 or 3 of them and making them into a RAID. What about limited write cycles? How long will it last for a system that has a filesystem with journaling enabled? I'd hate to abandon it. Are there significant differences between internal SSD which are used in modern laptops like MacBooks and USB flash drives? What should I expect in 10 years when the memory wear starts kicking in?

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