Search Results

Search found 5287 results on 212 pages for 'physical computing'.

Page 133/212 | < Previous Page | 129 130 131 132 133 134 135 136 137 138 139 140  | Next Page >

• What is causing a vm to exhibit packet loss?

  - by Joe Philllips

  We have a pretty nice piece of hardware set up to run multiple virtual machines in vmware and one of the vm's is an instance of Windows Server 2003 running SQL Server 2005. For some reason we occasionally see 10-20 seconds of straight packet loss to this machine from remote machines (my workstation) as well as other vm's on the same physical hardware. I am using PingPlotter to keep a close eye on the packet loss. So far we've turned off flow control on the NIC but we are already running out of other things to try. What might be causing this and how can I identify the problem? Note: We also have another server with a very similar configuration with the same type of problem to a lesser extent (because its not used as heavily?)

  Read the article

• PostgreSQL RAID configuration

  - by Yoldar-Zi

  I'm stuck how best to configure disk array. We have Hp P2000 G3 disk array with 24 SAS physical disks 300Gb each. We need to configure this array got 2 copies of PostgreSQL 9.2 because two different system. As we know it's recommended to store database and transaction logs(pg_xlog) files on separate disks. So we must setup 4 logical disk: 2 for transaction logs with RAID 1 2 for database with RAID 10 Is this right scheme of distribution? Or may be it is best to just make one big RAID 10 with 4 logical disks?

  Read the article

• Google Apps for Business on a separate infrastructure?

  - by dustin

  Does anyone know if Google Apps for Business edition hosts the apps (gmail, calendar, etc.) on a physically separate infrastructure than the Standard (free) infrastructure? We've been growing increasingly annoyed with the lost/severely delayed email messages, downtime, etc. of Google Apps (standard) over time, and we are wondering if moving to the paid version would bring any benefits. Specifically, if the Business edition is not in some way on a different physical infrastructure, and we are in essence paying for a few small perks but still run on the usual standard/free setup, then we would probably have the same (or just as many) issues with the Business version. I've emailed Google's sales team responsible for GApps, but haven't heard anything back in 4 days, which already doesn't speak well for the service. So, anyone have any insight into this? Thanks in advance for any and all help :)

  Read the article

• How to leverage Spring Integration in a real-world JMS distributed architecture?

  - by ngeek

  For the following scenario I am looking for your advices and tips on best practices: In a distributed (mainly Java-based) system with: many (different) client applications (web-app, command-line tools, REST API) a central JMS message broker (currently in favor of using ActiveMQ) multiple stand-alone processing nodes (running on multiple remote machines, computing expensive operations of different types as specified by the JMS message payload) How would one best apply the JMS support provided by the Spring Integration framework to decouple the clients from the worker nodes? When reading through the reference documentation and some very first experiments it looks like the configuration of an JMS inbound adapter inherently require to use a subscriber, which in a decoupled scenario does not exist. Small side note: communication should happen via JMS text messages (using a JSON data structure for future extensibility).

  Read the article

• Change user login in Windows 7 (after a misprint in username)

  - by Artem Russakovskii

  I have an install of Windows 7 that I've already put a few days into. Today I realized I've made a mistake in the username and it's driving me nuts (my personal OCD). While changing the physical folder name is perhaps possible, though quite involved, I do not want to open that can of worms. What I want to do is simply change the username I give when the login prompt shows up. I thought it's possible by just renaming the user account in the User Accounts but that didn't work. Is it possible to do then? Or is the only way to create another user and spend hour migrating everything I'd already customized to that user?

  Read the article

• Windows replacement for HAProxy

  - by GrayWizardx

  It does not appear that there is a similar question to this already posted, so I will go ahead and ask. I am working on a project that could benefit from having two - four servers handling incoming requests to a backend webservice. The service does not require SSL but does need to support occassional long running processes (upto 120 secs). This project does not at present have the funding to purchase a hardware load balancing solution. I have previously used HAProxy as a solution for this, and found it very simple and straightforward. Is there a similar product for windows (server 2003 or 2008) which provides similar configuration options and runs as a lightweight service? For reasons outside my control I cannot setup a Linux machine (physical or virtual) and so I am looking for behaviour that can be deployed on a windows machine. I can only find Perlbal which appears to fall into this category. So as not to keep this open indifenitely I will give credit to the only answer.

  Read the article

• Gparted: Copy Greyed Out

  - by David

  I booted my system to a gparted linux live CD and I have two partitions: /dev/sda1 /dev/sda2 I want to move both of them to my new physical hard drive (called /dev/sdb). When I right click on /dev/sda1, I can choose copy and then paste it onto /dev/sdb. When I right click on /dev/sda2, copy is greyed out and there is a yellow exclamation point to the left of the disk. I know that the disk works since I can boot my computer from it. Why won't gparted let me copy /dev/sda2 to my new hard disk? Since the option is greyed out, I don't even get an error message. Thanks!

  Read the article

• The cd command using variable to mapped NFS volume within ssh in linux script is not working

  - by Bhavya Maheshwari

  I have to do the following from within a bash script. The /VMNFS/ folder is present on linux box, from where script is run, and is mapped to the machine into which i am ssh'ing, as an NFS at /vmfs/volumes/VMNFS/. The second cd command doesn't work, neither with symbolic path name nor physical pathname. Why? and How to rectify this? #!/bin/bash ssh -2 [email protected] /bin/sh <<\EOF vmfile_path=`grep / vmvar_file` datastore_path=/vmfs/volumes/VMNFS/ cd $datastore_path && echo "The present working directory is" `pwd -P` esxi_vmfile_path_sub=`pwd -P` && echo "variable value is" $esxi_vmfile_path_sub esxi_vmfile_path=`echo $vmfile_path | sed "s:/VMNFS:$esxi_vmfile_path_sub:"` cd "$esxi_vmfile_path" EOF ***Output***: The current working directory is /vmfs/volumes/65335ec4-46d12e41 variable value is /vmfs/volumes/65335ec4-46d12e41 can't cd to /vmfs/volumes/65335ec4-46d12e41/TPAE7.5/

  Read the article

• Can a power failure or forceful shutdown damage hardware?

  - by Vilx-

  Can computer hardware suffer damage from forceful shutdowns (holding the power button for five (5) seconds) or power failures? I believe that normal PC hardware does not suffer from this - after all, it's not much different than what they experience under a standard shutdown. But elsewhere I've read tht another person thought that it could do physical harm to the hard drive and possibly other components as well. He also said that the journaling features of filesystems are useless in face of power failures and were intended to help mitigate damage from system crashes. I think this is nonsense, but then again I lack the experience and knowledge to say it with certainty.

  Read the article

• MySQL Windows vs. Linux: performance, caveats, pros and cons?

  - by gravyface

  Looking for (preferrably) some hard data or at least some experienced anecdotal responses with regards to hosting a MySQL database (roughly 5k transactions a day, 60-70% more reads than writes, < 100k of data per transaction i.e. no large binary objects like images, etc.) on Windows 2003/2008 vs. a Debian-based derivative (Ubuntu/Debian, etc.). This server will function only as a database server with a separate Web server on another physical box; this server will require remote access for management (SSH for Linux, RDP for Windows). I suspect that the Linux kernel/OS will compete less than the Windows Server for resources, but for this I can't be certain. There's also security footprint: even with Windows 2008, I'm thinking that the Linux box can be locked down more easily than the Windows Server. Anyone have any experience with both configurations?

  Read the article

• what constitutes out-of-band access to a server?

  - by broiyan

  The first time I access my server with a new installation of Filezilla or Putty, I will get prompted that I should continue only if the RSA key shown to me is correct. The cloud provider has advice on their website that I ought to use their AJAX console to get a key out-of-band with which to compare to the one shown by Filezilla. The AJAX console is launched from a link on the cloud provider's website which requires a login. Exactly how is this AJAX console considered to be out-of-band when it obviously is not a form of physical access to the server?

  Read the article

• Securing a persistent reverse SSH connection for management

  - by bVector

  I am deploying demo Ubuntu 10.04 LTS servers in environments I do not control and would like to have an easy and secure way to administer these machines without having to have the destination firewall forward port 22 for SSH access. I've found a few guides to do this with reverse port (e.g. howtoforge reverse ssh tunneling guide) but I'm concerned with security of the stored ssh credentials required for the tunnel to be opened automatically. If the machine is compromised (primary concern is physical access to the machine is out of my control) how can I stop someone from using the stored credentials to poke around in the reverse ssh tunnel target machine? Is it possible to secure this setup, or would you suggest an alternate method?

  Read the article

• setting up an access point from laptop to provide internet

  - by Avo

  i am trying to connect my wireless router as an access point from my laptop. the scenario is as follows: i have a wireless broadband connection at home, which i connect to using a username and a password. this username and password is unique, and can be used by one computer at a time!.. my sister and i can't have internet both at the same time! so im trying to connect my wireless router to my laptop with a physical cable so that i can provide internet via WiFi... first off, is this possible?!.. if not, what are my options? if it is possible, how do i set it up? a link to the appropriate steps would do as well, but i need it :(... thank you in advance, /av

  Read the article

• How can I resolve this error when using net start / stop: "The service name is invalid" ?

  - by JosephStyons

  We have a server that hosts a service (I'll call it "tomato"). Up until now, a client pc has been able to start and stop this service. They just double-click a batch file, and inside that batch file is the command net stop tomato or net start tomato They recently got a new physical computer, and now those same commands fail with the error: C:\>net stop tomato The service name is invalid. More help is available by typing NET HELPMSG 2185. What do I need to do to let the client pc start and stop this service remotely? Edit: I mis-remembered the original commands. They were not using "net start" and "net stop" remotely. They were using sc \\server_name start tomato and sc \\server_name stop tomato And those commands to indeed still work.

  Read the article

• VMware two vSwitches Guests can't communicate between them

  - by Aaron R.

  I have some servers in this configuration: And I am not able, from VMGuest1, to ping either VMGuest3 or VMGuest4. I can, however, ping Host1 and Host2, which are attached to pSwitch1. The behavior is the same with VMGuest3 or 4 trying to ping VMGuest 1 or 2. I don't have promiscuity enabled for any of these switches, nor do I have a bridge set up inside ESXi for the virtual switches. I know that one of these options is usually necessary when trying to get connectivity between two virtual switches. These switches are connected, however, through their respective physical switches which are bridged together. Ping just times out, arp request looks like this: [root@vmguest1:~]# arp -a vmguest3 vmguest3.example.com (1.2.3.4) at <incomplete> on eth0 [root@vmguest1:~]# arp -a host1 host1.example.com (1.2.3.5) at 00:0C:64:97:1C:FF [ether] on eth0 VMGuest1 can reach hosts on pSwitch1, so why can't it get to hosts on vSwitch1 through pSwitch1 the same way?

  Read the article

• OpenVZ multiple networks on CTs

  - by user6733

  I have Hardware Node (HN) which has 2 physical interfaces (eth0, eth1). I'm playing with OpenVZ and want to let my containers (CTs) have access to both of those interfaces. I'm using basic configuration - venet. CTs are fine to access eth0 (public interface). But I can't get CTs to get access to eth1 (private network). I tried: # on HN vzctl set 101 --ipadd 192.168.1.101 --save vzctl enter 101 ping 192.168.1.2 # no response here ifconfig # on CT returns lo (127.0.0.1), venet0 (127.0.0.1), venet0:0 (95.168.xxx.xxx), venet0:1 (192.168.1.101) I believe that the main problem is that all packets flows through eth0 on HN (figured out using tcpdump). So the problem might be in routes on HN. Or is my logic here all wrong? I just need access to both interfaces (networks) on HN from CTs. Nothing complicated.

  Read the article

• C or Ada for engineering computations?

  - by yCalleecharan

  Hi,as an engineer I currently use C to write programs dealing with numerical methods. I like C as it's very fast. I don't want to move to C++ and I have been reading a bit about Ada which has some very good sides. I believe that much of the software in big industries have been or more correctly were written in Ada. I would like to know how C compares with Ada. Is Ada fast as C? I understand that no language is perfect but I would like to know if Ada was designed for scientific computing. Thanks a lot...

  Read the article

• Create a Windows 7 System Repair ISO?

  - by MaDMaD Mad

  According to the Microsoft website I can run "Create a system repair disc" from the start menu to burn a recovery Disc. However, there are many situations (including not having a disk drive) where this cannot be done. My goal is to create a bootable USB drive according to this guide but their method to do so without burning a physical disc includes downloading an ISO from "somebody's" website. I don't know who "somebody" is and I feel it is reasonable to not boot something I can't verify as being untampered with. To the best of my knowledge, Microsoft does not host a recovery disc ISO for download as this would be the easiest solution. So my problem is that I'd like to circumvent Microsofts "burn to disc" option with a "burn to ISO" through any reasonable means.

  Read the article

• Planning to buy a server with at least 48GB Ram, are the blades way to go?

  - by varchar1

  We're planning to host our website for the first time for ourselves. We have currently have a linode of 8 gigs and the memory is going up to 90% most of the time. So I want to move my website to my own server with huge RAM. So this will be first time to manage any physical hardware of a server. So I came across IBM's BladeCenter, found them interesting. So can I just buy the blade and run it? Or do I have to buy the chassis for sure? Also, do I need to buy an UPS? So how hard is it to setup? How about the hard drives? Can I setup them easily? Please advice.

  Read the article

• Web Folder size/quota reporting tool?

  - by nctrnl

  I am currently using a Visual Basic script to determine how big the web folders are and what quota is decided for each folder. The quota is in no way a physical limit, just a value inserted by me to decide whether a user is using too much space or not. The script does the job quite neatly and sends an html file by mail on a regular basis. The problem is that it's such a hassle to insert new quotas since I have to fiddle around with the code. A central "control panel" with an overview and ability to insert new quotas would be more suitable. Is there any software that can do the following: Scan specified folder/subfolders Report the file size and present it in some sort of interface (could be a php/mysql solution) Ability to specify a quota and see the difference value ? It is really important that the quota handling is made simple so that some non-technician can handle this.

  Read the article

• Web Folder size/quota reporting tool?

  - by nctrnl

  I am currently using a Visual Basic script to determine how big the web folders are and what quota is decided for each folder. The quota is in no way a physical limit, just a value inserted by me to decide whether a user is using too much space or not. The script does the job quite neatly and sends an html file by mail on a regular basis. The problem is that it's such a hassle to insert new quotas since I have to fiddle around with the code. A central "control panel" with an overview and ability to insert new quotas would be more suitable. Is there any software that can do the following: Scan specified folder/subfolders Report the file size and present it in some sort of interface (could be a php/mysql solution) Ability to specify a quota and see the difference value ? It is really important that the quota handling is made simple so that some non-technician can handle this.

  Read the article

• Why is my ethernet interface in promiscuous mode

  - by nhed

  I read that seeing a flag of M in netstat -i is the way to tell which of your interfaces is in promiscuous mode I run it and I see that eth1 is in promiscuous mode $ netstat -i Kernel Interface table Iface MTU Met RX-OK RX-ERR RX-DRP RX-OVR TX-OK TX-ERR TX-DRP TX-OVR Flg eth1 1500 0 1770161198 0 0 0 57446481 0 0 0 BMRU lo 16436 0 97501566 0 0 0 97501566 0 0 0 LRU This seems to be the case on all the machines I checked (All Centos6.0, both virtual and physical), any idea why ethernet devices would be in such a mode unless someone was running any pcap based app (sudo lsof | grep pcap shows nothing)? I did not see any mention of promiscuous in any of the config files (sudo grep -r promis /etc) Any ideas what puts the interface into that mode and why? p.s. most of the posts I see seem to be security related, this is not that

  Read the article

• Identify SATA hard drive

  - by Rob Nicholson

  Very similar question to: Physically Identify the failed hard drive But for Windows 2003 this time. Scenario: Four identical SATA hard drives plugged into motherboard (no RAID controller here) Configured as single drive in Windows as a spanned volume One of them is starting to fail with error "The driver detected a controller error on \Device\Harddisk3" How do you cross-reference Harddisk3 to the physical SATA connection on the motherboard so you know which drive to replace? I know replacing this drive will trash the spanned array requiring it to be rebuilt anyway so my rough and ready solution is: Delete the spanned partition Create individual partitions on each drive labelled E: F: G: and H: and work out which one is Harddisk3 Power down, remove each disk one at a time, power-up until the drive letter disappears But this seems a rather crude method of identifying the drive. The SATA connectors will be numbered on the motherboard but I appreciate this might not cross-match to what Windows calls them. Thanks, Rob.

  Read the article

• Memory management (segmentation and paging) in 80286 and 80386: How does it work?

  - by Andrew J. Brehm

  I found lots of Web sites and books explaining how memory management worked on the 8086 and later x86 CPUs in Real Mode. I understand, I think, how two 16 bit values, segment address and offset are combined to get a linear 20 bit physical address (shift segment four bits to the left, add offset; segments are 64K and start every 16 bytes). But I couldn't find any good Web sites or books that explained how memory management works in Protected Mode, specifically the differences between 80286 and 80386. Can anyone point me to a good Web site or book (or explain it right here)? (For extra credit, i.e. an upvote, how does it work in Long Mode?)

  Read the article

• Which tool / technology: System management for databases and dependent services

  - by Filburt

  I'm looking for advice on how to enable our team to take down and re-start our company systems for maintainance purposes. The scenario includes several Oracle db machines several MS SQL Server machines with multiple instances windows services (IIS etc.) BizTalk EAI solution Apache and Tomcat instances lots of scheduled tasks on win2003 and win2008 machines (physical and virtual). The main focus is on capture all dependencies between said databases and services and tasks connecting to them. At the moment an enterprise class solution is not an option. We are considering developing a solution driven by PowerShell scripts but I hope for some more suggestions.

  Read the article

< Previous Page | 129 130 131 132 133 134 135 136 137 138 139 140  | Next Page >