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• Database Server Hardware components (order of importance), CPU speed VS CPU cache vs RAM vs DISK

  - by nulltorpedo

  I am new to database world and would like to know what are crucial hardware specs when it comes to database performance. I have searched the internet and found this so far (In order of decreasing importance): 1) Hard Disk: Get an SSD basically (much more IOPS than spinners) 2) Memory: Get as much as you can afford 3) CPU: For the same $ spent, prefer larger cache size over speed. Are these findings sensible? EDIT: I would like to focus on CPU speed VS CPU cache size. EDIT2: The database is used to store some combination of ints and int arrays with few text fields. There are a lot of Select queries looking for existing entries. If entry is not found, then insert it. I would say most of processing would be trying to find a match across a table with 200 columns and 20k rows. The insert statements are very few. EDIT3: Also, we have a lot of views (basically select queries).

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• Need For Speed Shift

  - by Paul

  My processor is an Intel Pentium D 3.0GHz, 1 GB of ram..Can i install and play Need For Speed Shift?

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• Finding optimal ddrescue command line options where Accuracy > Speed

  - by gav

  I'm read up a bit about this tool and obviously looked at the man pages. The trouble is that ddrescue takes so long I need to get the command right first time. I wasn't sure how to improve on the vanilla; $ sudo ./ddrescue -v /dev/disk0s5 MyVolImage.dmg MyVolRescue.log $ sudo ./ddrescue -v MyVolImage.dmg /dev/disk1s3 MyVolRestore.log From HSF+ to HSF+ drives Source (Broken) HDD is connected via USB 2.0 Dest HDD is inside MacBook I would choose accuracy over speed There seem to be a lot of options but I'm not sure how they impact quality and speed of recovery. Thanks, Gav

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• Un-balanced network speed although using fiberoptic cable line

  - by Hoàng Long

  I'm not sure this is a right place to ask this question, but there's a strange thing that I don't quite sure what the reason is. My company has hired a fiberoptic cable line for network use (Wifi and cable through a router). But the strange thing is that, whenever someone view YouTube or listen stream music, then network speed for all the others become extremely slow. The download speed for that person is about 4-5 MB/s (or more), but others suffer. I'm still a newbie about networking. But I know there should be a solution. Could anyone tell me a way to stop this bad behavior? It's not possible for asking people not viewing YouTube, since that's part of their jobs. Any insights about this problem would be very welcome.

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• low speed web application, Server problem or Application

  - by Ashian

  Hi, I have a web application written by asp.net (c#) sql server 2005. we host it on 2 dedicated server ( IIS and SQL server ) From some month ago , in some days of week we have many reports about speed issue. we have some other application on this server using same database. when we have speed problem all aplication on these server have this problem, but applications on other server in same data center work correctly. ram and cpu usage are ok. how can I check that the problem related to internet connection or my application design? which parameters must be checked. Some other information In applications users can upload several files to server , each file up to 3 MB. we use a sql web admin application, on same server that has same problem, this is a standard application which work perfectly on other servers. Thanks

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• Data transfer speed to USB storage connected to wifi router very slow

  - by RonakG

  Here is my setup. A Linksys Cisco E3200 wifi router. A MacbookPro running OS X Lion 10.7.4. A Seagate GoFlex 1TB hard drive connected to wifi router via the USB port. When I try to transfer data from my MBP to the HDD, the data transfer rate is very low. I'm getting around 3MB/s write speed. This is very slow compared to the speed I get when HDD is directly connected to the MBP. The HDD is NTFS formatted. And the router provides access to HDD using Samba share. So I connect to the HDD using smb://. What is the limiting factor here affecting the data transfer rate?

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• Test wireless speed?

  - by ULTRA_POROV

  Is there an utility that can test the speed between my pc and the wireless access point i am connected to?

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• Persian font in Netbeans cause speed reduction

  - by linker

  I have speed problem in Netbeans 7.0 IDE when my current open document has any Persian font inside it. If it happens, the speed of software incredibly reduce.( for example if I hit backspace, it takes about 10 seconds to respond). The amazing part is when I open a fully english document in Netbeans there is no problem and everything works well. I'm running netbeans 7.0 on Mac OS X 10.7.2. This problem happens with every fonts( even with fully Persian fonts). But I really want to have Persian with default Monospaced font. Thanks in advance.

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• What is casper rw loop file and why do I need it to make saving persistant on usb flash drive?

  - by l245c4l

  Suppose I've installed linux on my flash drive. Why do I need something like casper loop file to make saving persistant? So files are being erased? Isn't flash drive the same as actual hard drive? I'm linux noob so be patient. Or it is because linux on flash drive is actually live cd on flash drive? Can it be installed just like it is installed on hard drive? Thanks in advance

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• Where can I find more information on creating a driver for a usb device in C / linux?

  - by Jimmy Ruska

  I know how about the capture part in wireshark. Parsing and figuring out the data shouldn't be a problem. Links to where I can get more information, tutorials or forums on how to target and receive from the device, or related content would be most helpful.

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• Does anybody know of a USB Postage Scale that's Linux compatible?

  - by Nick

  I'm looking for a postage scale that already has linux support (drivers, etc) for a shipping system that I'm working on. I'm planning to use Ubuntu 9.04, but I am willing to switch distro's for compatibility. Does anybody know of any scales that currently work? Is there an open source project that's working on scale drivers or similar? Thanks!

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• Installation from Usb

  - by supreet

  Want to install ubuntu from usb flash but after i press continue after the install alongside windows button my HP pavillion laptop restarts and boots into vista and starts wubi installer. The wubi installer installation process ends with the following error. 'None Type' object has no attribute 'get_info' A portion of log file is as follows 12-01 06:15 DEBUG downloader: download finished (read 198 bytes) 12-01 06:15 INFO saplog: Verified a signature from ID:'46181433FBB75451'. 12-01 06:15 INFO saplog: Checking block bindings.. 12-01 06:15 INFO saplog: Key verified successfully. 12-01 06:15 DEBUG CommonBackend: metalink md5sums: 1fdde0057923dc6c4bd69b657480a631 *ubuntu-12.10-beta2-desktop-amd64+mac.metalink 091d4adafcfe4eea08eb41771be3f3ba *ubuntu-12.10-beta2-desktop-amd64.metalink 940ab0bf82879435181f8c03304e7387 *ubuntu-12.10-beta2-desktop-armhf+omap4.metalink 9e0ad0a15414df437a27c66da938d3e3 *ubuntu-12.10-beta2-desktop-i386.metalink 4672b67404c84ba74bf104607bbec49a *ubuntu-12.10-beta2-server-amd64+mac.metalink a8d35d8579f11579e802667bbcb7b0fb *ubuntu-12.10-beta2-server-amd64.metalink fb6219893d9f4f329183fafaac258681 *ubuntu-12.10-beta2-server-armhf+omap4.metalink 12fbf5ccf3aedfd8fe31f1ab00ec8ddb *ubuntu-12.10-beta2-server-i386.metalink e1a7672decc21eb6a65464b0a239a1db *ubuntu-12.10-desktop-amd64+mac.metalink 894437367bf791cf02902d6f5285af98 *ubuntu-12.10-desktop-amd64.metalink 57a58f151b50e218acc4724388d2f387 *ubuntu-12.10-desktop-armhf+omap4.metalink 11e206f0d5e147fe05b9e85d78f5f187 *ubuntu-12.10-desktop-i386.metalink fc37a124ca1957d7549a296d59e3dd81 *ubuntu-12.10-server-amd64+mac.metalink 35afee005d732a9ad0361b4aae25e3c3 *ubuntu-12.10-server-amd64.metalink 68adfc9d71d5b3613a09c3e6c45f8ba5 *ubuntu-12.10-server-armhf+omap4.metalink c4fd126394cf2e1bbd626b5f74b3e40b *ubuntu-12.10-server-i386.metalink 12-01 06:15 ERROR CommonBackend: The md5 of the metalink does match 12-01 06:15 ERROR CommonBackend: Cannot authenticate the metalink file, it might be corrupt None 12-01 06:15 DEBUG TaskList: #### Finished get_metalink 12-01 06:15 DEBUG TaskList: New task get_file_md5 12-01 06:15 DEBUG TaskList: #### Running get_file_md5... 12-01 06:17 DEBUG TaskList: #### Finished get_file_md5 12-01 06:17 ERROR CommonBackend: Invalid md5 for ISO D:\ubuntu\install\installation.iso (b4191c1d1d6fdf358c154f8bf86b97dd != 7e15759e5716c9bc662cd3efa5514cef) None 12-01 06:17 DEBUG TaskList: ### Finished check_iso 12-01 06:17 ERROR TaskList: 'NoneType' object has no attribute 'get_info' Traceback (most recent call last): File "\lib\wubi\backends\common\tasklist.py", line 197, in call File "\lib\wubi\backends\common\backend.py", line 595, in get_iso File "\lib\wubi\backends\common\backend.py", line 564, in use_cd AttributeError: 'NoneType' object has no attribute 'get_info' 12-01 06:17 DEBUG TaskList: # Cancelling tasklist 12-01 06:17 DEBUG TaskList: # Finished tasklist 12-01 06:17 ERROR root: 'NoneType' object has no attribute 'get_info' Traceback (most recent call last): File "\lib\wubi\application.py", line 58, in run File "\lib\wubi\application.py", line 132, in select_task File "\lib\wubi\application.py", line 158, in run_installer File "\lib\wubi\backends\common\tasklist.py", line 197, in call File "\lib\wubi\backends\common\backend.py", line 595, in get_iso File "\lib\wubi\backends\common\backend.py", line 564, in use_cd AttributeError: 'NoneType' object has no attribute 'get_info' Please help.

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• USB Thumb Drive not recognized in Hyper-V Manager

  - by Vazgen

  I have the free, standalone core Hyper-V Server 2012 running on my physical machine. I set up remote management from my Windows 8 client. When I proceed to create a virtual machine I would like to install the OS from a usb thumb drive but it is not recognized in Hyper-V Manager on my client (when the USB is plugged into the physical server) nor is it recognized in Server Manager under File and Storage Services Volumes Is there a role needed to recognize external usb flash drives? Because I think this standalone version is just core Hyper-V role and that's it... but this is such a basic functionality. Can anybody comment.

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• usb vs firewire for connecting two RAID 0 disks

  - by Arne

  I have a 2TB and a 4TB RAID 0 external drives (both have two physical hard drives in them). Both have a FW800, FW400, and USB port. My MacBook Pro has one FW800 port and two USB ports. I want to copy data from the 4TB drive to the 2TB drive. Is it better to A - connect both directly to the laptop, one with USB and one with FW800 or B - connect the 4TB drive to laptop with FW800 and the 2TB drive to the 4TB drive using a FW400 cable? Anyone have problems daisy-chaining RAID 0 disks using FW? Thanks!

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• Microsoft Ergonomic 7000 keyboard + mouse lag

  - by user115210

  I recently bought a new Microsoft Ergonomic 7000 keyboard. I started to use it with my Ubuntu 12.04 and it lags all the time. I try to be more specific: Even on a minor CPU usage the mouse lags. By minor I mean firefox loading a webpage, or opening an application like conky, gnome-terminal etc. When higher CPU usage occurs the keyboard is lagging too, but by this I mean it misses my hits, so what I type won't appear later. What I tried so far (and did not work)? Disable autosuspend (echo -1 to sys/bus/usb.../autosuspend) and at the same place set level to "on". I have tried several video drivers: Vesa, radeon, newest catalyst (and catalyst beta too) When my keyboard and/or mouse lags I tried an other USB keyboard which works perfectly and the same for the mouse. I tried the keyboard and mouse on a different computer with Linux (Ubuntu, Arch, OpenSuse) too, the same problem appears but not on Windows. I tried to replace the battery sets, and to change channel on the dongle. And also tried to use the dongle from other USB ports. On the same time I am able to use any other wireless mouse. I changed the XkbModel to "microsoft7000" but it did not solve anything. About the hardware: AMD A8 3870K - Radeon HD6550D 8 GB of memory 4 GB of swap (which is almost never used) Here are my PC's details: lsusb: Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub Bus 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub Bus 003 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub Bus 004 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub Bus 005 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub Bus 006 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub Bus 007 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub Bus 007 Device 002: ID 045e:071d Microsoft Corp. Bus 005 Device 002: ID 0461:4ea7 Primax Electronics, Ltd lspci: 00:00.0 Host bridge: Advanced Micro Devices [AMD] Family 12h Processor Root Complex 00:01.0 VGA compatible controller: Advanced Micro Devices [AMD] nee ATI BeaverCreek [Radeon HD 6550D] 00:11.0 SATA controller: Advanced Micro Devices [AMD] Hudson SATA Controller [IDE mode] (rev 40) 00:12.0 USB controller: Advanced Micro Devices [AMD] Hudson USB OHCI Controller (rev 11) 00:12.2 USB controller: Advanced Micro Devices [AMD] Hudson USB EHCI Controller (rev 11) 00:13.0 USB controller: Advanced Micro Devices [AMD] Hudson USB OHCI Controller (rev 11) 00:13.2 USB controller: Advanced Micro Devices [AMD] Hudson USB EHCI Controller (rev 11) 00:14.0 SMBus: Advanced Micro Devices [AMD] Hudson SMBus Controller (rev 13) 00:14.1 IDE interface: Advanced Micro Devices [AMD] Hudson IDE Controller 00:14.2 Audio device: Advanced Micro Devices [AMD] Hudson Azalia Controller (rev 01) 00:14.3 ISA bridge: Advanced Micro Devices [AMD] Hudson LPC Bridge (rev 11) 00:14.4 PCI bridge: Advanced Micro Devices [AMD] Hudson PCI Bridge (rev 40) 00:14.5 USB controller: Advanced Micro Devices [AMD] Hudson USB OHCI Controller (rev 11) 00:15.0 PCI bridge: Advanced Micro Devices [AMD] Device 43a0 00:15.1 PCI bridge: Advanced Micro Devices [AMD] Device 43a1 00:16.0 USB controller: Advanced Micro Devices [AMD] Hudson USB OHCI Controller (rev 11) 00:16.2 USB controller: Advanced Micro Devices [AMD] Hudson USB EHCI Controller (rev 11) 00:18.0 Host bridge: Advanced Micro Devices [AMD] Family 12h/14h Processor Function 0 (rev 43) 00:18.1 Host bridge: Advanced Micro Devices [AMD] Family 12h/14h Processor Function 1 00:18.2 Host bridge: Advanced Micro Devices [AMD] Family 12h/14h Processor Function 2 00:18.3 Host bridge: Advanced Micro Devices [AMD] Family 12h/14h Processor Function 3 00:18.4 Host bridge: Advanced Micro Devices [AMD] Family 12h/14h Processor Function 4 00:18.5 Host bridge: Advanced Micro Devices [AMD] Family 12h/14h Processor Function 6 00:18.6 Host bridge: Advanced Micro Devices [AMD] Family 12h/14h Processor Function 5 00:18.7 Host bridge: Advanced Micro Devices [AMD] Family 12h/14h Processor Function 7 03:00.0 Ethernet controller: Realtek Semiconductor Co., Ltd. RTL8111/8168B PCI Express Gigabit Ethernet controller (rev 06) dmesg | tail -n 150: http://pastebin.com/sGUAAiUe cat /var/log/Xorg.0.log: http://pastebin.com/fny7ZkN4 Note: The Icon7 Twister Evolution is the replacement mouse to use.

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• Installing XP through USB-to-IDE/SATA connector?

  - by overtherainbow

  Hello To help someone reinstall a corrupt XP install on his IDE or SATA drive in a older desktop box (hence no Vista/W7), I was thinking of asking him to bring his harddrive and meet at Starbucks, and I would install a brand new XP by connecting it to my laptop, and booting it up with the XP install CD. If someone's already used a USB-to-IDE/SATA connector such as this one by Sabrent: Does the XP CD accept installing Windows to an external IDE/SATA through USB? Does USB 2.0 provide enough power to run an external IDE/SATA drive, or do I need to provide the drive with its own power (in which case, how?)? Thank you.

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• Windows Home Server backup recovery missing driver for USB Device

  - by Pat James

  I'm doing a backup recovery of a Windows 7 PC from the backup on Windows Home Server. I've done this before and am accustomed to the prompt to load drivers for devices such as the NIC from a USB flash drive, which I have all loaded up with the drivers from the special folder in the WHS backup repository for this PC. My problem on this PC is that one of the drivers the recovery CD complains is missing is "USB Device", and it fails to find the drivers when I click the button to scan for and install drivers. So it seems it can't access the USB flash drive to load the other drivers. Any suggestions? I think my next step is to pull a DVD drive from another system and plug it in with a CD burned with the device drivers.

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• Building uEFI bootable ISO and USB for Windows 7 deployment

  - by Darragh

  I have been trying to build up a window's 7 and 2k8 EFI deployment ISO or USB. But struggling to to even get an ISO to boot from even VMware Workstation EFI implementation. The problem is there is no clear requirement to what the EFI bootloader is looking for, "e.g EFI boot file" even ISO's and USB's that are bootable don't find the required .efi file. I'd like to know what is the process EFI bootloader follows to boot the EFI file. e.g; in a EFI windows system its; C:\Windows\Boot\EFI\bootmgfw.efi From DVD it's; F:\efi\microsoft\boot\cdboot.efi from what people tell me it's on USB; G:\efi\boot\bootx64.efi (bootmgfw.efi renamed) I've been testing on a HP notebook with EFI 2.0 and VMware Workstation 8.0 with .vmx file firmware = "efi"

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• USB cable model for Kodak EasyShare Z740

  - by Robert Munteanu

  I've lost the original USB cable for my Kodak EasyShare Z740, and I can't figure out which model I should replace it with. I did not find the original parts, as the camera is pretty old. I did find the cable on the Kodak site, but I I've tried both mini-USB and micro-USB and neither fit. Alternatively, bonus points for pointing out a dealer in Bucharest, Romania which has the original part. N.B. I do use a card reader now, but I find it more convenient to use the cable.

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• USB Virtual RAM is not working properly

  - by Haseeb Anwar

  This images are help u in solving my question.1I have installed Windows 7 64 bit. I have made a virtual USB RAM but it is not working properly. First I go to the USB PropertiesReady Boost. Use this device as a virtual RAM and then click Apply then Ok. then I go to My Computer PropertiesAdvance system settingsAdvance(tab)SettingsAdvanceChange. When i click on change button the USB is not here. What can I do. Please answer my question.

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• Booting a GPT USB key on older BIOS laptop

  - by fonix232

  I have an old HP EliteBook 8530p, which does not support booting from GPT USB (GPT HDDs are fine though). Lately I had the wish to have a fast-to-start OS for browsing, smaller web tasks, etc., so I grabbed a ChromeOS build (latest one by ArnoldTheBat), flashed it on an 8GB flash drive, and popped it in. It did not boot, so I dug deeper and discovered that it actually is GPT, and cannot be converted to MBR. As my laptop does not support UEFI booting from USB (there's a really-really beta UEFI support in the BIOS, but as I said, it only supports GPT hard drives, not USB devices), I'm stuck. Is there any way of booting it, say, another flash drive with a specific boot loader/manager (e.g. Plop)?

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• parallel to usb driver windows 7 dot matrix printer

  - by user975234

  I recently built a new Core i5 system with Windows 7 Professional. I had planned to hook up my TVS MSP 250 XL printer using a USB to parallel cable Once I plug the cable in, Windows 7 recognizes it as an IEEE-1284 controller and automatically installs the appropriate driver. However, in the status window it reports the following: "USB Printing Support -- Ready to use" "No Printer Attached -- Ready to use" When I then go ahead and manually add the printer using the "virtual printer port for USB" I can add the printer seemingly without problem. Once finished, it appears in the Devices and Printers panel. Yet, all attempts to print on this printer fail. It appears that simply no data is sent to the printer (either by programs like word or adobe or by attempting to print a test page. Does anybody know how to fix this?

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• How to connect to internet 2 or more pcs with an usb wifi adapter

  - by bhaoahd

  In one pc I have an USB Wifi adapter (Realtek RTL8187L Chipset), from there a 10 meters cable to an outdoor antenna. With that I connect to a public Access Point. Now I want to be able to connect more computers to internet using that same connection that comes from the outdoor antenna, what options do I have to do this? I do have another usb wifi adapter with a small omni antenna, and a router encore ENHWI-G/A. This router can be used as a Wifi AP, but it needs a modem that works with the RJ45 connector. Is there a way I could take internet from the outdoor antenna, and create another AP indoor using that router to "repeat" that wifi that comes from the outdoor antenna? If creating this second AP is not possible, should I use some sort of local network between computers, connect my main PC with the outdoor antenna, and share the connection through the lan? (I would really prefer to have a second AP indoor so I can connect other devices like a Palm, but I am not sure how could this be possible with this router and the usb wifi adapter)

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• Backing up to USB drives in 2008 R2

  - by jbbarnes

  I set up backups in 2008 R2 to backup to a USB drive, and the backup program formatted the drive so it doesn't appear with a drive letter. Rotating to the next of four backup drives breaks the backups because it has an NTFS partition on it. I don't see a way to prepare each of my USB drives to be used for backups. What kind of formatting is the backup program expecting to find and write to and how do I ensure my other USB drives can be rotated? Thanks.

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• Windows 7 on laptop hard drive does not boot after installing Windows to Go on external hard drive

  - by user1687031

  Just successfully installed and ran Windows 8's Windows to Go on a USB external hard drive. However, after shutting down and removing the USB hard disk, whey I to start my laptop (with only Windows 7 installed), but it doesn't boot and trying to repair it doesn't work. It seems that Windows 8 had corrupted the partition table on the laptop's hard drive, causing Windows 7 to fail to boot. How do I fix that and avoid future problems of the same type?

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