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  • CISCO WS-C4948-10GE SFP+?

    - by Brian Lovett
    I have a pair of CISCO WS-C4948-10GE's that we need to connect to a new switch that has SFP+ and QSFP ports. Is there an X2 module that supports this? If so, can someone name the part number that will work? I have found some information, but want to make sure I have the correct part number for our exact switches. Per the discussion in the comments, I believe I have a better understanding of things now. Would I be correct in saying that I need these SR modules on the cisco side: [url]http://www.ebay.com/itm/Cisco-original-used-X2-10GB-SR-V02-/281228948970?pt=LH_DefaultDomain_0&hash=item417a8d35ea[/url] Then, on the switch with sfp+ ports, I can pick up an SR to SFP+ transceiver like this: [url]http://www.advantageoptics.com/SFP-10G-SR_lp.html?gclid=CKP4s-G27b4CFXQiMgodLD8AQA[/url] and finally, an SR calbe such as this: [url]http://www.colfaxdirect.com/store/pc/viewPrd.asp?idproduct=1551[/url] Am I on the right track here?

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  • Where do I start ?

    - by Panthe
    Brief History: Just graduated high school, learned a bit of python and C++, have no friends with any helpful computer knowledge at all. Out of anyone i met in my school years I was probably the biggest nerd, but no one really knew. I consider my self to have a vast amount of knowledge on computers and tech then the average person. built/fixed tons of computers, and ability to troubleshoot pretty much any problem I came across. Now that high school is over, Ive really been thinking about my career. Loving, living computers for the past 15 years of my life I decided to take my ability's and try to learn computer programming, why I didn't start earlier I don't know, seems to be big mistake on my part... Doing some research I concluded that Python was the first programming language I should learn, since it was high level and easier to understand then C++ and Java. I also knew that to become good at what I did I needed to know more then just 2 or 3 languages, which didn't seem like a big problem considering once I learned the way Python worked, mainly syntax changed, and the rest would come naturally. I watched a couple of youtube videos, downloaded some book pdf's and snooped around from some tutorials here and there to get the hang of what to do. A two solid weeks had passed of trying to understand the syntax, create small programs that used the basic functions and understanding how it worked, I think i have got the hang of it. It breaks down into what ive been dealing with all this time (although i kinda knew) is that, input,output, loops, functions and other things derived from 0's and 1's storing data and recalling it, ect. (A VERY BASIC IDEA). Ive been able to create small programs, Hangman, file storing, temperature conversion, Caeser Cipher decode/encoding, Fibonacci Sequence and more, which i can create and understand how each work. Being 2 weeks into this, I have learned alot. Nothing at all compared to what i should be learning in the years to come if i get a grip on what I'm doing. While doing these programs I wont stop untill I've done doing a practice problem on a book, which embarresing enough will take me a couple hour depending on the complexity of it. I absolutly will not put aside the challenge until its complete, WHICH CAN BE EXTREMELY DRAINING, ive tried most problems without cheating and reached success, which makes me feel extremely proud of my self after completing something after much trial and error. After all this I have met the demon, alogrithm's which seem to be key to effiecent code. I cant seem to rap my head around some of the computer codes people put out there using numbers, and sometimes even basic functions, I have been able to understand them after a while but i know there are alot more complex things to come, considering my self smart, functions that require complex codes, actually hurt my brain. NOTHING EVER IN LIFE HURT MY BRAIN....... not even math classes in highschool, trying to understand some of the stuff people put out there makes me feel like i have a mental disadvantage lol... i still walk forward though, crossing my fingers that the understanding will come with time. Sorry if is this is long i just wish someone takes all these things into consideration when answering my question. even through all these downsides im still pushing through and continuing to try and get good at this, i know reading these tutorials wont make me any good unless i can become creative and make my own, understand other peoples programs, so this leads me to the simple question i could have asked in the beginning..... WHERE IN THE WORLD DO I START ? Ive been trying to find out how to understand some of the open source projects, how i can work with experianced coders to learn from them and help them, but i dont think thats even possible by the way how far people's knowledge is compared to me, i have no freinds who i can learn from, can someone help me and guide me into the right direction.. i have a huge motivation to get good at coding, anything information would be extremely helpful

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  • Is there no such thing as a Gigabit switch?

    - by Torben Gundtofte-Bruun
    According to the manufacturer specification, even my rather plain desktop computer has "Gigabit Ethernet". So when I want to copy large files over the LAN (not Internet) it would make sense to have a gigabit switch. I'm searching eBay for a gigabit switch for a planned home network upgrade. The products I find are all labeled "gigabit" but they all have 24 x 10/100Mbit autosensing ports and sometimes 2 x 10/100/1000Mbit autosensing ports. It was my understanding that 10/100 is ancient and that modern computers have network interfaces that work with 1000Mbit, so it would make sense to get a switch that has 24 x 1000Mbit ports. Did I misunderstand, or are sellers (deliberately?) mislabeling older hardware? (Let's not dive into wired vs. wireless networks and how "N" wireless is fast. You'd be right, but not answering the question.)

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  • One EC2 source with distributed varnish machines

    - by Elad Lachmi
    I have a web site hosted in an EC2 instance (2008 r2 + iis7.5 + sql server). I put one linux box running RHEL with varnish. After some configuration trail and error, I found a configuration that works. Now I want to duplicate the varnish boxes to other availability zones, but continue to pull the pages from the original windows box. It is my understanding that I can put the varnish boxes in different zones and pull from the windows box via it's external IP. But what do I need to do in order for each user to receive content from the box physically closest to them? Is this even possible? Thank you!

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  • SQL restore from single file db to filegroup

    - by Mauro
    I have a 180GB MOSS 2007 database whose maintenance (i.e. backups and restores) are becoming a problem. Part of the issue can be resolved by splitting the three content sites down into their own site collections, however this will likely still leave me with a 100gb DB to deal with. Whilst this isnt entirely problematic for SQL it does mean that backups / restores take far too long. my idea is to split each of the databases to 30gb files, then to import the content into them which should distribute the content across the file groups,making it much easier / faster to backup/restore. Is there a way to backup from a single file and restore to a filegroup? If i have the wrong understanding of filegroups then I'm more than happy to find out other methods of managing the size of databases.

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  • Excel sum from column based on another column

    - by jsmars
    I have two columns. The values in the first one are either blank or have a 1. The values in the second one is a number. I also have a variable field. At the bottom of each column, I'd like to have a "total" field, which checks if there is a value (of 1) in the first column, and if there is, adds this up from the value of the second column (on the same row) and multiplies it by the variable. for example: variable 10 name1 name2 counter 1 2 1 3 1 1 3 1 4 totals 100 50 since name1 has 3 1's in it's column, it takes each value from the counter column, and multiplies it by the variable, and outputs the total I'm sorry if this has been asked, I've tried searching but I have a hard time understanding the excel syntaxes. Thanks!

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  • Why is my NTP controlled computer clock two minutes ahead?

    - by Martin Liversage
    The clock in my computer is configured to be synchronized using NTP. To verify this I have tried two NTP clients using various NTP servers. My computer and the NTP clients are in complete agreement about the current time even across a wide range of NTP servers. I also have a GPS and my national phone company provides an accurate clock available by calling a specific phone number. Both my GPS and the phone company agrees on the current time. However, my computer is almost precisely two minutes (or 1 minute and 59 seconds) ahead of what I believe to be the "real" current time where I live. Why is my computer two minutes ahead? I realize that synchronizing clocks using the internet may not be entirely accurate as there is latency, but two minutes is a very long time on the internet. Is NTP really two minutes ahead? I'm running Windows 7 and live in the time zone UTC+1, but I don't think that is important in understanding my problem.

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  • Should I Return My iPhone?

    - by Daniel
    got an iPhone 3G S about 20 days ago. That means I can return it no problem for the next 10 days. Should I return it, wait about 6 weeks, and get the iPhone 4.0 instead? I also put about $25 towards accessories but I could probably sell them for $15. Is it worth it not having it for those 6 weeks? Or should I just go with the free update, keep my screen protectors and case, and "survive" without the phone. What new features will come with the phone? My understanding is that most of the features will be part of the upgrade. My other option will probably be to give it back and then when they make the official announcement, buy the 3G S for maybe $99 if they drop the price that much.

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  • When to use delaycompress option in logrotate?

    - by Anand Chitipothu
    The man page of logrotate says that: It can be used when some program cannot be told to close its logfile and thus might continue writing to the previous log file for some time. I'm confused by this. If a program cannot be told to close its logfile, it will continue to write forever, not for sometime. If the compression is postponed to next rotation cycle, the program continues to write to that file even after the next rotation cycle. How is postponing solving the problem? My understanding is that copytruncate should be used when a program cannot be told to close the logfile. I'm aware that some data written to the logfile gets lost when the copy is in progress. I was looking at the logrotate file for couchdb, and it had both copytruncate and delaycompress options. /usr/local/couchdb-1.0.1/var/log/couchdb/*.log { weekly rotate 10 copytruncate delaycompress compress notifempty missingok } It looks like there is no point using delaycompress when copytruncate is already there. What am I missing?

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  • Should server spare parts be stored in climate controlled storage?

    - by Shane Wealti
    What is a best practice for storing server spares (hard drives, RAM, power supplies, etc) with respect to how/where they are stored? Some options are storing them in climate controlled storage or just a standard warehouse-type stockroom? My understanding is that all other things being equal climate-controlled storage is preferred. What are the risks of storing that type of thing in a non-climate-controlled, somewhat dusty shelving area? Conversely are there risks to storing spares in a climate controlled area? If there are space limitations in climate controlled storage are there some parts, such as hard drives, which should be in climate controlled, while other parts such as power supplies will probably be ok in non climate controlled storage?

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  • Z77 Motherboard with i7-2600K cpu, what will not work?

    - by Mxx
    I'm building a new system. So far I think I narrowed it down to Gigabyte GA-Z77X-UD5H (Z77 Ivy Bridge chipset) motherboard. I was planning to get i5-3570K(Ivy Bridge) cpu, but now I can get i7-2600K(Sandy Bridge) cpu for free. It is my understanding that Ivy Bridge platform brings support for PCIe3 and (additional?)USB3 ports. If I were to put SB cpu into IB motherboard, what is going to happen to PCIe3 slot? Will it not work at all or downgrade to PCIe2? Also, what is the situation with USB3 ports?

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  • Having trouble getting startup scripts to work in Server 2003

    - by Az
    Thanks for taking the time to read this. I am having trouble getting my startup scripts to run correctly on the domain I am administering. Before anyone gets upset and says "go read xxx article from microsoft",... I have. I am simply missing something or not understanding it properly. I understand how to assign the script, what I am curious about is where exactly it should be placed in the Windows folder structure. I have been able to get them to work by creating a share folder called "scripts" and pointing to that exact unc pathname IE \servername\scripts\xxx.bat. However, I would like to do it properly, would someone please tell me where they should be placed in Win2003 server, and what the path name should be when assigning a group policy to do something that applies to computer specific properties? Your assistance is very much appreciated by a junior admin trying to learn some new tricks!

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  • Is there a way to do a Windows 7 repair install when you are unable to start/boot Windows 7?

    - by irrational John
    My understanding is that the only way to perform a "repair install" in Windows 7 is to run the install setup.exe within the Windows 7 installation you want to repair. This seems a little brain dead to me since usually the reason I wanted to perform the repair install was because the existing installation was so broken that I could no longer boot and use it. It seems Microsoft is saying my only option in that case is to do a clean install and then reinstall all my apps. So I'm wondering if anyone knows of a way to perform a Windows 7 repair install ... one that preserves your existing OS settings and application installs ... on a Windows 7 partition that cannot be booted.

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  • Is Software Raid1 Using mdadm with a Local Hard Disk and GNDB Possible?

    - by Travis
    I have multiple webservers which use many small files to created dynamic web pages. Caching the web pages isn't an option. The webserver also performs writes so I need a synchronous filesystem. I'm looking to maximise performance as it's my understanding that small files is the weakness (to varying degreess) of a cluster filesystem over ethernet. Currently I'm using Centos 5.5, 64 bit. Since it's only about 300MB of data, I'm looking at mdadm using RAID-1 with the GNBD and a local hard disk using the "--write-mostly" option so the reads are done using the local hard disk. Is this possible? If so, is there any advantage to making it a tmpfs disk instead of a local hard disk? Or will the files on the local hard disk just get cached in RAM anyway so I won't see a performance gain by using tmpfs, assuming there's enough RAM available?

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  • Provision storage in SAN encironment

    - by wildchild
    hi,.. Can somebody help in understanding how Lun Provisioning is done in clariion based on client requirement. Say, a client needs one 50 GB space on the host( for application) ,two -350 GBs ( for DB and stuff) on the same host and i have 4 raid groups with space of 200 GB in one 50 GB in second and 400 GB and 400GB in rest two all having 5 disks. And , I 'm using Raid 5 only. How do i provision keeping performance in mind( so that performance hit is not there)?..And i need to understand the concept of meta head as well. Please help me by elaborating the above scenario..I am learning to provision storage in non productive environment( b'fore going ahead and working on client prod server) and i have been learning a lot from SF ...I request the seniors here to help me understand it better. Thanks for reading

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  • Routing Essentials

    - by zharvey
    I'm a programmer trying to fill a big hole in my understanding of networking basics. I've been reading a good book (Networking Bible by Sosinki) but I have been finding that there is a lot of "assumed" information contained, where terms/concepts are thrown at the reader without a proper introduction to them. I understand that a "route" is a path through a network. But I am struggling with visualizing some routing-based concepts. Namely: How do routes actually manifest themselves in the hardware? Are they just a list of IP addresses that get computed at the network layer, and then executed by the transport? What kind of data exists in a so-caleld routing table? Is a routing-table just the mechanism for holding these lists of IP address (read above)? What are the performance pros/cons for having a static route, as opposed to a dynamic route?

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  • Recommend an SFTP solution for Windows (Server & Client) that integrates well with Dreamweaver

    - by aaandre
    Could you please recommend a secure FTP solution for updating files on a remote windows server from windows workstations? We would like to replace the FTP-based workflow with a secure FTP one. Windows Server 2003 on the remotely hosted webserver, WinXP on the workstations. We manage the files via Dreamweaver's built-in FTP. My understanding is Dreamweaver supports sFTP out of the box so I guess I am looking for a good sFTP server for Windows Server 2003. Ideally, that would not require cygwin. Ideally, the solution would use authentication based on the existing windows accounts and permissions. Thank you!

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  • How do I make an Illustrator file "higher resolution"?

    - by drewjoh
    I was given an illustrator file, but all the curves on the artwork are jagged. I've tried "rasterizing" and exporting by increasing the size of the image. I don't know what else to do or what I'm doing wrong. My understanding is the beauty of Illustrator is that it's all done mathematically, so I can scale it up to infinity and it will be perfect (more or less). And that lines are drawn that way also, so they should be (or can be) infinitely smooth if they want to be. Here's what I have right now: Here's what I have with the image selected showing the plot lines: And a zoomed in view: *I'm not experienced in Illustrator at all; I only know whatever I can carry over from moderate Photoshop experience.

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  • Graciously shutdown external HDD enclosure?

    - by Jakobud
    I recently purchased a large HDD along with the following HDD enclosure: http://www.newegg.com/Product/Product.aspx?Item=N82E16817173043 It has a simple on-off switch on the back. When I want to turn this thing off, do I simply just flip the switch? I assume the switch simply kills the power to the HDD, but isn't that potentially a bad thing in the case that the HDD is still reading/writing? I used to have a Seagate external HDD and it had a button on the front that I had to hold down for a second or two before it would turn off, but it at least appeared to sort of go through a shutdown procedure where it probably would stop the HDD activity before cutting power. So with this external HDD, I'm a little bit leery about that power switch and understanding exactly what it does. Is this how all HDD enclosures are? EDIT: I'm running the drive in Ubuntu Server. So there is no 'ejecting' the drive lol

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  • rsync - how to set/keep directory permissions?

    - by Dylan
    I'm using CwRsync to connect from my Windows development machine to a linux webserver : rsync -avuz -e ./ssh --exclude=".svn" /cygdrive/c/xampp/htdocs/project123/ [email protected]:/home/user123/public_html This syncs my development project directory nicely and fast to the server. But after doing this, all directory properties are reset to the local user 'user123' only, so the website is not available anymore. I need to manually reset those properties. Why is this happening, and how to prevent it? PS. coming from a Windows environment I'm having a really hard time understanding rsync. I copied the above command from some examples... just need to get this one small thing working too...

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  • Backup SQL server db issue: delete old backup files

    - by David.Chu.ca
    I tried to use sqlmaint.exe tool to back up a database on a remote PC. Here is an example of backup: sqlmaint.exe -S remoteSQLServer\SQLInstance -U username -P pwdxxx -D myDB -BkUpMedia DISK -BkUpDB C:\MSSQL_Backups -DelBkUps 3days ... Here I specified to delete backups older than 3 days. However, the job seems not deleting old bak files on the remote PC(where the SQL server sits). The remote PC has Windows 2008 Server. I also set the C:\MSQL_Backups as shared network drive for EnyOne as owner. My understanding is that the job will delete any bak files older than 3 days. Not sure what I missed? By the way, the job runs at a box with SQL server 2005 installed.

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  • Where should I go to learn about networking? [closed]

    - by Ollie Saunders
    I wonder if anyone could recommend resource or resources such as a good book that: explains how all the important protocols work and interact. I’m interested in those that are relevant in a typical home network and used over the Internet explains in detail how ADSL Internet connections work to the level of depth necessary so that I’m able to tweak and measure performance settings starts from the beginning but attempts to provide proper understanding rather than idiot-oriented steps to follow Basically, I’m interested in how these technologies work and tend to be implemented in hardware and software rather than “here’s what to do if…” I’m interested in Computer Networking by Andrew S. Tanenbaum and I wonder if anyone else has any experience with that title. It’s expensive but I could probably loan a copy for £3 from the library or so.

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  • Troubleshooting "connection reset" error on my linux server

    - by Chris
    I fervently hope someone here can help me with the problem I am experiencing. I am a programmer, and I have very little understanding of linux sysadmin terminology/concepts. I am attempting to troubleshoot a problem with my website. It is a Facebook app, and whenever I try to connect using Chrome, I get an error stating that the "connection was reset". I have been Googling for four days straight trying to find a solution to this problem, but no joy. A big part of the problem is that I do not understand the terminology being employed, and the output from many of the tools referenced is likewise indecipherable to me. I am running a VPS with CentOS 5, apache, PHP, and MySQL. I could spam this post with a ton of information from my iptables, apache, etc but if anyone needs information from my server, please let me know how to get it, and I will post it here. Thank you for any help you can offer!

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  • How to set up Google Apps (mail) MX Records on DNSMadeEasy (screen shot included)

    - by user41847
    I am attempting to complete google's mail MX setup. I would link, but new users can't have two links, and I think the following img is more important. This is what my input options are for DNS Made Easy, which manages my domain: http://img94.imageshack.us/img94/5662/dnsmadeeasy.gif I would like to confirm that I understand the fields correctly. It is my understanding that I am supposed to: Leave Name (Host) Blank Set Data to ASPMX.L.GOOGLE.COM. (and repeat for each of the server addresses provided by google) Set the MX level to what Google has in "Priority" column Set TTL as high as possible Did I get it right? The nightmare scenario is that I screw up, and bring everyone's mail down :P Thanks in advance for your time.

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  • How to address an EC2 instance from both inside and outside datacenter?

    - by Alexandr Kurilin
    I'm trying to find a good way of being able to address my EC2 database instance from both inside and outside of the datacenter. Other EC2 instances need to be able to call into it, and other clients like pgAdmin might need to connect to it from the outside world as well. It's my understanding that using the internal and external DNS names is sustainable long term as each reboot leads to a change. I'm thinking of associating an Elastic IP with the instance and giving it an A record (say db1.mydomain.com) which I then will use both within and outside the datacenter. Further instances in the same role will get the same treatment and a DNS record of db2.mydomain.com etc. Now, is there a cleaner and more stable way of achieving this result? Am going about this the wrong way? Suggestions?

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