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  • Intel Core i7-4960HQ vs. 4850HQ (Haswell) [on hold]

    - by Timothy R. Butler
    I'm looking at the new MacBook Pros and trying to decide between the Core i7-4960HQ (2.6 GHz) and i7-4850 (2.3 GHz). I've found some synthetic benchmarks comparing them, but I haven't found a lot of data, so I'd appreciate any pointers to good comparisons for the Haswell family (especially these two processors). My cursory analysis seems to suggest there isn't a huge gain from the extra 300 MHz. I'd like to determine not only whether this is generally true, but also to figure out if the gains that are made in performance come at too high of cost. Is the 2.6 going to be pushing the limits of what can fit in a thin laptop without overheating? I've looked at some of Intel's documentation, but have not been able to determine what the normal and maximum operating temperature differences are for the models. In the past, there have been times that Intel's fastest models in a given range ran especially hot and/or consumed significantly more power compared to slightly slower models. Do those concerns factor into the current generation?

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  • Stop SQL Server services from conveniently

    - by MedicineMan
    I have a general use laptop. I use it for games, development, and web surfing. I've just installed SQL Server 2008 with Analysis, Reporting, and Error reporting, as well as any of the other options on the installer. I also have a default instance of SQL server as well as a named instance. When I'm not doing development, I'd like to shut down these services conveniently. I'm thinking that a batch file would be good. What are the commands to shut these services down and release the associated memory and resources? It appears that: net stop MSSQLSERVER seems to stop the MSSQLSERVER instance. What about the other services?

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  • Creating a .bat file to execute mysql and other commands

    - by BCIT - JD
    I'm looking for a way to reduce the amount of typing I do to check mysql entries and other things. For example, I wanted to create a .bat file that will execute the following commands. mysql -u user -p *enter in the password* USE databasename SELCT * FROM table; The problem is after the initial mysql -u user -p the rest of the commands written down do not get executed. Is it possible to continue running commands after calling something like mysql or other programs, that seem to add its prefix(?) to the beginning of commands (mysql). I'm not very familiar with the terminology so forgive me if it sounds confusing. I'd like to use the same kind of concept for other things as well. Help is much appreciated, Thanks.

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  • DNS servers via RA in IPv6

    - by glglgl
    Some time ago, RFC 6106 was created, which states how a router tells the clients about the DNS server to be used. It is a new standard, it has to be implemented, which needs time etc. I'm courious about the need for it: wouldn't have it been better to define a "globally valid" anycast address for DNS? Queries would be sent to this address and would be promoted along the default route until there is a host which claims to be responsible for it. In an enterprise network, that would be a central DNS server (or even more, on really big companies); in a SOHO network, it would either be the router or the DNS server of the ISP, in a root server hosting data center, it would be the DNS of the hoster, etc. What do I see wrong here? Do I have a wrong view of the anycast concept?

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  • Where is the actual content in a TCP segment

    - by packetloss
    When I email something or download a program, or do anything else over a network, where in the segment is the actual content? If I am emailing a 20KB word document, and the maximum data field size in a segment is 1500 bytes, does that mean it takes about 14 segments to mail my document wherever it is going? I get, I think, the OSI model and I have a decent grasp of the IP protocol. I think I understand the concept of header wrapping of each successive layer in the protocol stack. What I can't get a definitive answer to is where does the actual content go in a TCP segment? Is that the datagram? Maybe the fact I am asking proves I have no clue... Many thanks.

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  • Awstats messaging non existant user causing exim4 to go nuts

    - by Chris
    I've taken over managing a server set up by someone else now uncontactable, while managing to work out most faults / changes needed this one is stumping me. Awstats is running on the machine and sending messages via exim4 to a user every time it runs an update. The user account has been deleted and so the exim4 main log files are filling up with message delivery errors, which firstly hinders meaningful log analysis for anything else and secondly uses up quite a lot of space (it grew to 22GB unattended, panic!) I've been through all the conf files in /etc/awstats and can't seem to find any mention of this user account. Google just turns up results about how to use awstats to parse exim4 log files. So the questions is where is this setting (on debian) likely to be? Cheers in advance

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  • Should you disable page file with SSD?

    - by Pyrolistical
    I've been reading this question, and it has a lot of great information. But assuming you have more than enough ram, I think page file should be disabled on SSD to extend the life time. I know you would lose the core dump on crash, but not many people need that information. From my understand without a page file as you reach the limit of your ram that might trigger thrashing on disk. But for SSDs there is no concept of thrashing, reads are fast. What do you guys think?

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  • Agile sysadmin and devops - How to accomplish?

    - by Marco Ramos
    Nowadays, agile systems adminitration and devops are some of the most trending topics regarding systems administration and operations. Both these concepts are mainly focused on bridging the gap between operations/sysadmins and the projects (developers, business, etc). Even if you never heard of the devops concept, I'm sure that this topic is your concern too. So, what tools and techniques do you use to accomplish devops in you companies? I'm particularly interested in topics like change management, continous integration and automatization, but not only. Please share your thoughts. I'm looking forward to read your answers/opinions :)

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  • Finding trends in multi-category data in Excel

    - by Miral
    I have an Excel spreadsheet that contains hundreds of rows of data that each represent a single sample in a larger population. Each row is divided into three columns that contain frequency counts of a specific type of thing. Together the three columns summed on a single row represent 100%, though each row will sum to a different value. What I'm most interested in are the proportions of each of these types (ie. percentages of each column relative to the sum of the three columns). I can easily calculate this on a per-row basis, but what I'm really interested in is trying to find an overall trend from the entire population. I don't really spend much time doing data analysis so the only thing I can think of trying is to create those percentage columns and then average them, but I'm sure there must be a better way to visualise this.

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  • A clear understanding about Mozilla Firefox web applications

    - by Girish Mony
    I have seen lately a concept of installing open web applications in Firefox and Google Chrome just like extensions here . While the site says it as a installable websites. It looks very similar to bookmarks to me. When you click either bookmarks or this installed applications, it opens new tab and the site or application can be viewed. My question is what is the main difference between normal web application like Gmail, or Super user or Facebook and these installable websites? Also what is the advantage in using this installable web apps from normal web applications which we can access by entering url in the browser address bar? I hope this is the right place to post this question. If not please guide me accordingly.

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  • Is there any SMS/MMS server for LAN environment

    - by Chau Chee Yang
    I am looking for a solution to send SMS/MMS message to mobile device from desktop or browser in LAN environment. As such, it is most probably using TCP/IP protocol to transmit request/response. The server may attach to a GSM device with SIM card attached. An server application would then start accept the request from any LAN client and convey the SMS/MMS to one or more recipients. The server may log all requests for further traffic analysis in later stage. Is there any solution that able to perform what I describe here. Please advice.

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  • Changing default shortcut for Spaces on a Macbook Pro with Snow Leapord?

    - by Mahmoud Abdelkader
    I'm primarily a Linux user but my main home PC is a Macbook Pro with Snow Leopard. The concept of "Spaces" in a Mac is extremely important to how I utilize my development environments and I use this feature on Linux all the time. I use Compiz Manager for Ubuntu which allows me to "Desktop Switch" and navigate all desktops using the Ctrl+Alt+Arrow keys to a particular desktop. On a Mac, the process is similar, however, you're only given 3 non-customizable short-cuts: Option+Arrow, Ctrl+Arrow, and Alt+Arrow. How can I change the keyboard shortcut to take Ctrl+Option? The keys would then fit my working style and it won't feel awkward to remember two sets of keyboard shortcuts. Thanks! Mahmoud

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  • What is the S.M.A.R.T. page?

    - by Mads Skjern
    I've just listened to Steve Gibson talk about his SpinRite software, on the Security Now podcast episode 336 (transscript). At 33:20 he says: I can show and do show on the SMART page that sectors are being relocated and that errors are being corrected. That SMART analysis page sometimes scares people because it shows, wait a minute, this thing says we're correcting so many errors per megabyte. What is this SMART page? 1) Some information saved on the HD by SMART, that I can access with a SMART tool like smartmontools? 2) A page (tab) in his SpinRite software? In any case, can I see, in any way, what sectors are marked as bad, without using SpinRite? Preferably using smartmontools!

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  • Should you disable page file with SSD?

    - by Pyrolistical
    I've been reading http://serverfault.com/questions/23621/any-benefit-or-detriment-from-removing-a-pagefile-on-an-8gb-ram-machine, and it has a lot of great information. But assuming you have more than enough ram, I think page file should be disabled on SSD to extend the life time. I know you would lose the core dump on crash, but not many people need that information. From my understand without a page file as you reach the limit of your ram that might trigger thrashing on disk. But for SSDs there is no concept of thrashing, reads are fast. What do you guys think?

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  • Packet logging on PIX firewall

    - by georged.id.auindex.htm
    We have a Cisco PIX 515 firewall and I would like to set up a simple logging that would give us a traffic breakdown for billing by: source destination protocol port size time PIX is plugged into Catalyst 2970 and I was told that the best thing since sliced bread for logging is to get Netflow and get Catalyst to log. My concern, however, (besides the Netflow cost) is that I really don't want to "listen" to the internal noise and all I'm interested in are the external traffic stats above for billing and analysis purposes. What would be the simplest and the easiest solution? Cheers George

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  • Is there a way to bridge two outgoing TCP connections in order to bypass firewalls and NAT?

    - by TK Kocheran
    We're all familiar with the problem of port-forwarding and NAT: if you want to expose something to accepting an incoming connection, you need to configure port-forwarding on the router or conjure up some other black magickery to "punch holes" in the firewall using UDP or something. I'm fairly new to the whole "hole-punching" concept so could someone explain how it works? Essentially, I'd like to understand how hole-punching would work and the theory behind it, as well as if two TCP connections could be bridged via a third party. Since there's no issue with outgoing TCP connections since it's handled with NAT, could a third party bridge the connections so that the two parties are still connected but without the bandwidth cost of traffic going through the third party?

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  • Does Lapping a CPU / Heatsink actually drop the temp?

    - by Pure.Krome
    Hi folks, i've been watching some YouTube vids about Lapping a CPU. I've never heard of this modding technique before and, though extreame, I was wondering if it acutally works? Assuming you lap your cpu and/or heatsink correctly, will the temps drop? When I say drop, at least a 1 degree drop is success (for the debate of this topic). To keep this topic clean, please refrain from anyone commenting on the overkill of labour, just for a 1 degree (worst case) drop, etc. This is a discussion about the theory and concept, not personal opionion of wether to lap or not.

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  • Verify server performance

    - by George Kesler
    I'm looking for a quick and SIMPLE way to verify that new servers are performing as expected. The most important metric is disk performance, second is network performance. I’m trying to prevent problems caused by misconfiguration of RAID arrays, NIC teaming etc. The solution should work with both physical and virtual servers. I don’t need sophisticated analysis with different workloads, just one set of benchmarks which I would run against a reference server and later compare to new ones. One problem is that most benchmarks are not giving accurate results when running on a VM.

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  • Can I pin a cmd/batch file to command prompt on the Windows 7 taskbar?

    - by eidylon
    Hey all, just wanted to ask quick if anyone knows how to do this. If not I'll post it on connect.microsoft.com as a suggestion. With Explorer pinned to the taskbar you can pin folders to Explorer, so they are in the jumplist for the explorer shortcut. I have a shortcut to CMD pinned to my taskbar and would like to be able to do the same concept, ... that is to be able to pin a bat/cmd file to the CMD shortcut, so in the CMD jumplist, I could have quick access to a couple batch files I use routinely. Anyone know a way to do this? I tried just dragging the batch file to the CMD shortcut on the taskbar like how you do with folders and Explorer, but that did not work.

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  • Analyzing Linux NFS server performance

    - by Kamil Kisiel
    I'd like to do some analysis of our NFS server to help track down potential bottlenecks in our applications. The server is running SUSE Enterprise Linux 10. The kind of things I'm looking to know are: Which files are being accessed by which clients Read/write throughput on a per-client basis Overhead imposed by other RPC calls Time spent waiting on other NFS requests, or disk I/O, to service a client I already know about the statistics available in /proc/net/rpc/nfsd and in fact I wrote a blog post describing them in depth. What I'm looking for is a way to dig deeper and help understand what factors are contributing to the performance seen by a particular client. I want to analyze the role the NFS server plays in the performance of an application on our cluster so that I can think of ways to best optimize it.

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  • create new subdomain or buy new domain? seo costs [migrated]

    - by greek_no_money
    If I am targeting the same audience, but the new sub-site has different concept from the existing site, should I create a new sub-domain or create a new domain? What are the seo advantages and disadvantages of creating a new sub-domain? For example Stack Exchange with Alexa rank 1.474 right now, has sub-domains such as programmers.stackexchange.com and other domains such us serverfault.com with rank 3.515 and stackoverflow.com with rank 109. So why didn't Stack Exchange put, for example, Stack Overflow in a sub-domain to create a better ranking?

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  • Drawbacks of installing linux on usb stick?

    - by Znarkus
    I am setting up a router/nas/http/whatever server based on an ION mini-ITX board. I've installed Ubuntu Server on an old 160 GB drive, but it generates a lot more heat and vibrates more than my other new drive (storage). It just doesn't fit the concept, and worse: it takes up a SATA port. As SSD's are crazy expensive I'm thinking of buying an extra 4 GB USB stick, and raid0 it. From my point of view, these are the pros/cons: Pros Low power consumption No vibrations No heat Smaller Get to buy new, larger USB stick (:D) Cons Shorter life time Slower Raid 0 More work maintaing/installing? I think the pros overweighs the cons. Shorter life time and raid 0 is countered by regular backups of the configs/settings. Slower is partially countered by raid 0, and I don't know about the last one. What do You think? Experience? Another solution?

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  • MongoDB ReplicaSet Elections when some nodes are down

    - by SecondThought
    I'm trying to get into ReplicaSet concept, and found something weird in mongoDB Documentation: For a node to be elected primary, it must receive a majority of votes. This is a majority of all votes in the set: if you have a 5-member set and 4 members are down, a majority of the set is still 3 members (floor(5/2)+1). Each member of the set receives a single vote and knows the total number of available votes. If no node can reach a majority, then no primary can be elected and no data can be written to that replica set (although reads to secondaries are still possible). (taken from here) So, If I got that right, in the 5-member case mentioned there the one node that's still standing WILL NOT be chosen as primary and the whole set will not get any writes? and that's even if this single node was the last primary before the elections? If it's true there can be many less-radical cases which will end up with a degenerated set. How can we avoid this?

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  • Understanding the Linux Root

    - by Zac
    I've been using Linux (Ubuntu) for about 2 weeks now and am still struggling with some basic concept surrounding the root user: (1) Some terminal operations (such as making subdirectories inside a FHS directory such as /opt) require me to prefix the command with sudo - why? I guess what I'm choking on is: if I'm already logged in as a valid system user, why do I have to be a superuser/root in order to modify things that the sysadmin has already deemed me worthy of accessing? (2) Is there a GUI (Gnome, KDE) equivalent to sudo? Is there a way to assume a superuser role through a graphical context, rather than from inside a new shell? (3) I can't access the /root directory logged in as myself... but I installed the system to begin with and was never asked to create a root account! How do I log in as root and gain access to /root?!? Thanks for all feedback & input!

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  • Understanding the Linux Root

    - by Zac
    I've been using Linux (Ubuntu) for about 2 weeks now and am still struggling with some basic concept surrounding the root user: (1) Some terminal operations (such as making subdirectories inside a FHS directory such as /opt) require me to prefix the command with sudo - why? I guess what I'm choking on is: if I'm already logged in as a valid system user, why do I have to be a superuser/root in order to modify things that the sysadmin has already deemed me worthy of accessing? (2) Is there a GUI (Gnome, KDE) equivalent to sudo? Is there a way to assume a superuser role through a graphical context, rather than from inside a new shell? (3) I can't access the /root directory logged in as myself... but I installed the system to begin with and was never asked to create a root account! How do I log in as root and gain access to /root?!? Thanks for all feedback & input!

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