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• Time Machine vs Source Control?

  - by Blub

  Finally got convinced to start using some kind of version control for my code instead of zipping down a copy of the project at the end of each day. Downloaded Tortoise SVN and used it to create a repository localy on my hdd. I've been using it for 2 days now but I have to say that using it is actually more hassle than just copying the project manually in explorer. Sure, you only store incremental changes but with the cheap disks of today I can't really say that's an argument when you only have small projects. I haven't realy found a quick way to browse the older versions of my files eighter. What I want is an infinite undo that is completely transparent while I code, if I save the file I want a backup. I don't want to check out, check in and don't even get me started on moving files. I haven't tried Time Machine for OS X but it looks like it's exactly what I'm looking for. Does such a program exist for windows? Preferably free and with some kind of tagging-system so I can tag a timestamp when the project is working etc. Maybe should add that I mostly work alone on a single computer. Update: Some of you asked why I want backup. Since I work alone it's mostly to allow me to quickly hack up a solution without worrying that something will screw up.

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• Font rendering in Internet Explorer vs other browsers on Windows XP

  - by Ben McCormack

  I have four browsers installed on my Windows XP SP3 machine: Internet Explorer 8, Firefox 3.5, Safari 4, and Google Chrome. For whatever reason, fonts appeared to be rendered differently in IE than in the other browsers. It seems the fonts are anti-aliased in IE but not in the others. Why might this be? Is this an issue with the browsers or my operating system? I've noticed this issue on several Windows XP machines that I've used. While it may seem like no big deal, the lack of font smoothing in the other browsers keeps me from using them as my primary browser. Most importantly, what can I do to get the other browsers to render fonts smoothly?

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• Slideshow screensaver in Win-7 vs. XP

  - by daveh551

  Since I skipped Vista, this may be an old question, I don't know. In XP, the built-in SlideShow (Photos) screensaver would randomly rotate among images not just in the directory specified in the settings, but also in any sub-directories (and on down) of that directory. When I use the Photos screensaver in Win-7, it seems to use only images in the directory I specify, ignoring the rest of the tree below that. Is there a way to get the XP behavior? Alternatively, is there some other public domain/open source Screen Saver with that or similar behavior that I can install?

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• Centos OS resource footprint vs Ubuntu package refresh

  - by webworm

  I am trying to determine which distro to sink my teeth into. I am new to the Linux world and would like to choose a distro to focus on. I have read that CentOS uses less resources than Ubuntu, which is an issue for me since I am renting a VPS and resource cost is an issue. I have also read that Ubuntu has more up-to-date packages which is a concern for me as I want to use PHP and some packages that have a fair amount of dependencies. I am not using Linux as a desktop OS, rather just as a server for Apache, PHP, PERL, and Java development. What would be the best choice for a server OS? CentOS or Ubuntu? Are the resource requirements that different? Are the packages that different between the two? Thanks.

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• UNC vs. SFTP vs. SSH for uploading to a Windows server

  - by apollodude217

  I understand that UNC, SFTP, and SSH are, of course, different interfaces (protocols?). But feature-wise, how do they differ? Are there things you can do with one that you cannot do with another? Is one more secure than another? The situation I want to fix is one where we have several Windows servers and VPC's, some of which have SFTP servers and some of which don't. For those that don't we use UNC over a VPN shared by the entire enterprise. What I want to do is either use all UNC, all SFTP, or all SSH (unless a real need to vary on a case-by-case basis presents itself). Links would be excellent. My biggest problem here is that my googling brings up irrelevant results. :(

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• Multiple servers vs 1 big server performace

  - by pistacchio

  Hi to all! My team of developers has suggested a server structure for an upcoming project we are developing. Our structure is "logical", meaning that the various logical components of the application (it is a distributed one) relies on different servers. Some components are more critical than others and will be subjected to more load. Our proposal was to have 1 server per component but the hardware guys suggested to replace the various machines with a single, bigger one with virtual servers. They're gonna use Blade Servers. Now, I'm not an expert at all, but my question to the guys was: so if we need, for example, 3 2GHz CPU / 2GB RAM machines and you give me 1 machine with 3 2GHz CPUs and 6 GB of RAM it is the same? They told me it is. Is this accurate? What are the advantages or disadvantages of both the solutions? What are the generally accepted best practices? Could you point out some URL reference dealing with the problem? Thank you in advance! EDIT: Some more info. The (internet / intranet) application is already layered. We have some servers on the DMZ that will expose pages to the internet and the databases are on their own machines. What we want to split (and they want to join) are some webservers that mainly expose webservices. One is a DAL that communicates with the database layer, one is our Single Sign On / User Profile application that gets called once per page and one is a clone of what seen on the Internet to be used on our lan.

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• Nexus One vs Xperia X10

  - by Mark

  Trying to decide which phone to get; I think I've narrowed it down to one of these two. The Xperia X10 seems pretty sweet except for one drawback: the phone/voice quality seems to be lacking. I haven't heard anything about the quality on the Nexus though. Otherwise they seem pretty neck and neck. What do you guys think?

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• IIS 7.5 log to: sql server vs file

  - by stacker

  I want to know if get IIS to log directly to the sql server is resource costive, and a better solution maybe generate log files, and each hour import this files to sql server. Does it VERY big cost to log to sql server each request directly? The pages are open connection to the database anyway for each request.

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• Data Archiving vs not

  - by Recursion

  For the sake of data integrity, is it wiser to archive your files or just leave them unarchived. No compression is being used. My thinking is that if you leave your files unarchived, if there is some form of corruption it will only hurt a smaller number of files. Though if you archive, lets say all of your documents, if there is even the slightest corruption, the entire archive is unrecoverable. So whats the best way to keep a clean file system, but not be subject to data corruption.

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• Router vs switch in a LAN [closed]

  - by servernewbie

  If I have a LAN and and connect it with a switch, I understand it uses a CAM table to route packets in layer 2 (by saving mac to port relations). So far all good. However, when using a router for a LAN (ONLY for a LAN, not to connect it to "the outside" WAN/internet/etc) I get a bit confused as to how it internally processes packets. I would first split this into two router scenarios: Router with buit-in switch In this scenario, I would expect that it will act exactly as a switch with a CAM table internally. This would probably benefit a bit in speed (guessing here?) compared to the next option. Router without built-in switch Here is where I get confused. If hostA wants to send a packet to hostB, it will ARP to find hostB's MAC address and send it there. Now, if we had a switch (above scenario) this would be easy. But how does it work now in a router WITHOUT a switch? If I would guess, hostA would send an Ethernet frame with hostB's MAC address to the line. The router would fetch the packet (even though the router has another MAC address, it would still fetch this packet even if it only contains hostB's MAC address). It would strip the Ethernet frame header and check the IP, and then check its own internal ARP table again for the MAC address. Now, this would seem like a waste of resources compared to a router with a built-in switch. But maybe it does not work like that at all. Does it also contain a CAM table? If that would be true, what would then the difference between these two routers really be?

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• Amazon EC2- many micro-instances vs single small/medium instance

  - by shashankaholic

  I have a chat application using stack of Openfire, Tomcat6 and MySQL. Currently, i have installed all these servers on single Linux micro-instance(613 MB memory). Even in low user base 10-20 i am encountering CPU overload which is quite obvious here. As, i am new to Amazon EC2 can somebody suggest me how to scale up my architecture according to traffic use? should i use separate micro instances for every app server(openfire,mysql,tomcat6) should i use single small or medium instance for whole server stack. Some factors in context: high reliance on MYSQL high memory usage due to file transfer web-application interacting with other Amazon service like S3,SES

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• mongod fork vs nohup

  - by Daniel Kitachewsky

  I'm currently writing process management software. One package we use is mongo. Is there any difference between launching mongo with mongod --fork --logpath=/my/path/mongo.log and nohup mongod >> /my/path/mongo.log 2>&1 < /dev/null & ? My first thought was that --fork could spawn more processes and/or threads, and I was suggested that --fork could be useful for changing the effective user (downgrading privileges). But we run all under the same user (process manager and mongod), so is there any other difference? Thank you

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• High frequency, kernel bypass vs tuning kernels?

  - by Keith

  I often hear tales about High Frequency shops using network cards which do kernel bypass. However, I also often hear about them using operating systems where they "tune" the kernel. If they are bypassing the kernel, do they need to tune the kernel? Is it a case of they do both because whilst the network packets will bypass the kernel due to the card, there is still all the other stuff going on which tuning the kernel would help? So in other words, they use both approaches, one is just to speed up network activity and the other makes the OS generally more responsive/faster? I ask because a friend of mine who works within this industry once said they don't really bother with kernel tuning anymore-because they use kernel bypass network cards? This didn't make too much sense as I thought you would always want a faster kernel for all the CPU-offloaded calculations.

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• Tape vs SSDs backups regarding long-term storage reliability

  - by user66131

  My question is very specifically about solid state drives, not regular hard drives. I would like to put in place a grandfather-father-son backup scheme, with the SSDs being used for the grandfather and father portions, and the yearly grandfather would be locked in a safe offsite for maybe 5-10 years. Can I expect that after this period of time the data would be preserved as well as it would be on a tape?

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• Centos repository packages vs latest developer release

  - by fran

  I have started to run a personal server using CentOS and I have noticed that many packages that are available to install from repository are old compared with the latest release from the developer. I know that installing packages from repository is very easy and I guess that the supplied versions are stable and prepared to work without any trouble, but I still find odd having so much software that lags behind the current version. It's my first time with linux and I don't know what is the "normal" thing, should I stick to whatever version the repository supplies, or try to get the latest from the developer? To be more precisely, the repository supplies the apache httpd web server with version 2.2, I wanted to update to 2.4, so I started removing apache and its dependencies packages that come with centos to use the latest ones, but when I was about to remove pcre v6 to replace it with v8, i found out that 132 installed packages depend on it and probably it is not a good idea to remove it, so that made me think twice about getting the latest software instead of using the packages supplied by the official repositories. Should I leave things as they are instead of going on an upgrade rampage? Thanks

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• xinet vs iptables for port forwarding performance

  - by jamie.mccrindle

  I have a requirement to run a Java based web server on port 80. The options are: Web proxy (apache, nginx etc.) xinet iptables setuid The baseline would be running the app using setuid but I'd prefer not to for security reasons. Apache is too slow and nginx doesn't support keep-alives so new connections are made for every proxied request. xinet is easy to set up but creates a new process for every request which I've seen cause problems in a high performance environment. The last option is port forwarding with iptables but I have no experience of how fast it is. Of course, the ideal solution would be to do this on a dedicated hardware firewall / load balancer but that's not an option at present.

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• Clearos open vpn vs windows open vpn client where client connects with no default gateway

  - by Paul

  Am using clearos as open vpn server and configured my users on windows machine with open vpn client. My problem is that users connect to the server without a default gateway and also with ip conflicts, i can ping the server but i can not ping any user behind the server. please any one can help to find out what causes the clients to connect without a default gateway and also not to be able to ping any user behind the clearos open vpn server. Help with a step by step guide of installing open vpn on clearos and open vpn clients on windows. Thanks

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• SQL Server Authentication vs Windows Authentication

  - by Nandu

  Hi, I am a SQL Server newbie and would really appreciate any help. I have created a new login (test2) with sql server authentication and granted select & vierw definition permission on another schema (test1) to test2. I am however not able to see the objects of test1 in the object explorer. However I can select the objects from the Query Window. Since this new login is being used to develop reports the user would like to view the objects in the Object Explorer. Another user test3 created using windows authentication and similar permissions is able to see test1's objects in the explorer. Please let me if this is the cause and if not how can help test2 see the objects in Object Explorer.

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• 32 vs 64-bit software for same machine?

  - by GorillaSandwich

  What is the difference between 32 and 64-bit software? My understanding is that 64-bit can use more RAM, if it's available, because it has a larger address space for it. Is this correct? And, specifically: If I have a 64-bit operating system with lots of RAM, and I install, say, the 32-bit version of MySQL instead of the 64-bit version, will it be unable to use all the available RAM and therefore run slower than the 64-bit version might on the same machine (assuming RAM becomes the bottleneck before processing speed or disk access speed or whatever)? If I have a 32-bit operating system and I install a 64-bit piece of software on it, will it (probably) fail to run?

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• IP Address vs MAC addresses

  - by Codenotguru

  why do we need ip addresses if mac address is enough to identify the machine???

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• Nginx vs Apache as reverse proxy, which one to choose

  - by mhd

  Hi, this kind of question maybe has been asked here but I couldn't find any that really match my question. Heard that nginx performance is quite impressive, but Apache has more docs, community(read:expert) to get help Now what I want to know, how both web servers compare in term of performance, easiness of config, level of customization,etc. AS REVERSE PROXY server in a vps environment?? I'm still weighing between the two for a ruby web app(not ROR) served with thin server. Specific answer will be much appreciated. General answer not touching the ruby part is okay. I'm still noob in web server administration.

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• Pros and Cons using 32bit vs 64bit operating system (Windows 7)

  - by Pennf0lio

  I want to know what will be the difference and advantages using 32 and 64 bit. why does it really matter. What will it's benefit to Windows 7 users. Thanks!

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• How to benchmark kernel (-Os vs -O2)

  - by NightwishFan

  It seems logical to me that on a 64-bit kernel compiling it to optimize for size might help overall. (My distro of choice uses -O2) It has the benefits of more registers and memory and perhaps less cache contention than normal optimized code. I have a kernel compiled like this and it seems excellent. However my question is how can I prove this? I like using Phoronix for "real world" sort of benchmarks so I would prefer to test cases like that. What should I pick to test? Does anyone else have any alternatives? Thank you very much in advance.

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• Wifi audio streaming vs what?

  - by Moshe

  I've noticed certain radio apps, that some stations required wifi and others did not. What were those other stations possibly using? Are there other methods of streaming audio on iOS?

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• HP DL160 G6 memory PC3-10600R vs PC3-10600E

  - by Jeremy Hajek

  I am using a HP DL 160 G6 server that according to specs takes PC3 Registered or Unbuffered. When I combine the two types of memory below the system will not POST. When I use just the first type of memory listed the system will POST. I have two pieces of HP memory that came with the server labeled PC3-10600E-9-10-E0 and then I have some Crucial memory labeled PC3-10600R-9-10-B0 I wager that the R means Registered memory and the E means ECC - then shouldn't the crucial memory boot with the system according to the HP specs? Or does the E mean it is Unbuffered and therefore I shouldn't mix and match as according to this HP memory config doc?

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