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  • SEO - Can it Help Your Online Business?

    SEO can help you to grow your business online. If you implement proper search engine optimization techniques, you can reach the top of your business. With the increase in number of websites in the modern times, SEO has become a very important factor and it plays a vital role in the success of any business.

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  • Why Membership Sites?

    People look to the internet for information. They are willing to spend time and money for online content. Starting up membership sites and building them is a $2B market and it is continuing to grow.

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  • Keyword Analysis - What You Need For Your SEO Strategies

    One of the preliminary things you can do towards successful internet marketing is to perform a thorough keyword analysis. If you have any desire to use your website for the business to grow, then the first thing you should do is implement a comprehensive internet marketing technique.

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  • WordPress SEO Services

    Blogging has become a popular way to promote a website or product. Updated daily, with fresh and relevant material, good bloggers can quickly generate a large following. Like a virus, the popularity of both the blog and the bloggers' site, will spread and grow. The only problem is, it takes a lot of time, energy and know-how to properly manage a blog. Many business owners are turning to WordPress SEO services to ensure their WordPress blog or website is as effective as possible.

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  • What's the best way to cache a growing database table for html generation?

    - by McLeopold
    I've got a database table which will grow in size by about 5000 rows a hour. For a key that I would be querying by, the query will grow in size by about 1 row every hour. I would like a web page to show the latest rows for a key, 50 at a time (this is configurable). I would like to try and implement memcache to keep database activity low for reads. If I run a query and create a cache result for each page of 50 results, that would work until a new entry is added. At that time, the page of latest results gets new result and the oldest results drops off. This cascades down the list of cached pages causing me to update every cache result. It seems like a poor design. I could build the cache pages backwards, then for each page requested I should get the latest 2 pages and truncate to the proper length of 50. I'm not sure if this is good or bad? Ideally, the mechanism I use to insert a new row would also know how to invalidate the proper cache results. Has someone already solved this problem in a widely acceptable way? What's the best method of doing this? EDIT: If my understanding of the MYSQL query cache is correct, it has table level granularity in invalidation. Given the fact that I have about 5000 updates before a query on a key should need to be invalidated, it seems that the database query cache would not be used. MS SQL caches execution plans and frequently accessed data pages, so it may do better in this scenario. My query is not against a single table with TOP N. One version has joins to several tables and another has sub-selects. Also, since I want to cache the html generated table, I'm wondering if a cache at the web server level would be appropriate? Is there really no benefit to any type of caching? Is the best advice really to just allow a website site query to go through all the layers and hit the database every request?

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  • Search Engine Optimization

    If you are interested in search engine optimization, the first thing you need to know is key words are vital. They are the function that is going to lead people to your website and help you grow in the ranks of the various search engines. When your web page is crawled, a search engine spider (which is essentially a robot) will send information back to the search engine reviewing your website.

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  • Enterprise Portal Development In ASPDOTNET

    You have good business and a website which helps you to grow more. Now you are reaching at a point that you want a business application that helps you and your employees in all ways means you need a ... [Author: Jessica Woodson - Web Design and Development - May 13, 2010]

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  • Optimizing Transaction Log Throughput

    As a DBA, it is vital to manage transaction log growth explicitly, rather than let SQL Server auto-growth events "manage" it for you. If you undersize the log, and then let SQL Server auto-grow it in small increments, you'll end up with a very fragmented log. This article demonstrates how this can have a significant impact on the performance of any SQL Server operations that need to read the log.

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  • Is SEO Critical to Your Business? Consider This

    The number of people turning to the Internet to get answers to their questions is growing by leaps and bounds. Currently, the amount of people utilizing search engines like Google to find information, answers, shopping solutions, and more, sings to the tune of 64%! And as that number will undoubtedly grow, properly implementing Search Engine Optimization (SEO) practices into your marketing grows with it.

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  • How Do I Pick the Keywords For My Website?

    When I'm working with clients to help them grow their business through internet marketing I frequently hear my customers say "I already have a website, and we rank high on Google." This always leads to an interesting discussion.

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  • Search Engine Optimization For Your Business

    We are living in the world of competition. As a businessman, you have to do an initiative that will make your business grow. With this, it is important to know about search engine optimization to make your site stand out in the search engine.

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  • mdadm+zfs vs mdadm+lvm

    - by Alex
    This may be a naive question since I'm new to this and I cannot find any results about mdadm+zfs, but after some testing it seems it might work: The use case is a server with RAID6 for some data that is backed-up somewhat infrequently. I think I'm well served by any of ZFS or RAID6. Platform is Linux. Performance is secondary. So the two setups I am considering are: A RAID6 array plus regular LVM and ext4 A RAID6 array plus ZFS (without redundancy). Is this second option that I don't see discussed at all. Why ZFS+RAID6? It's mainly because the inability of ZFS to grow a raidz2 with new disks. You can replace disks with larger ones, I know, but not add another disk. You can accomplish 2-disk redundancy and ZFS disk growth using mdadm as the redundancy layer. Besides that main point (otherwise I could go directly to raidz2 without RAID under it), these are the pros-cons that I see for each option: ZFS has snapshots without preallocated space. LVM requires preallocation (might be no longer true). ZFS has checksumming (very interested in this) and compression (nice bonus). LVM has online filesystem growth (ZFS can do it offline with export/mdadm --grow/import). LVM has encryption (ZFS-on-Linux has not). This is the only major con of this combo I see. I guess I could go RAID6+LVM+ZFS... seems too heavy, or not? So, to close with a proper question: 1) Is there anything that inherently discourages or precludes RAID6+ZFS? Anyone has experience with a setup like this? 2) Are there possibilities for checksumming and compression that would make ZFS unnecessary (maintaining the possibility of filesystem growth)? Because the RAID6+LVM combo seems the sanctioned, tested way.

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  • How can a Linux Administrator improve their shell scripting and automation skills?

    - by ewwhite
    In my organization, I work with a group of NOC staff, budding junior engineers and a handful of senior engineers; all with a focus on Linux. One interesting step in the way the company grows talent is that there's a path from the NOC to the senior engineering ranks. Viewing the talent pool as a relative newcomer, I see that there's a split in the skill sets that tends to grow over time... There are engineers who know one or several particular technologies well and are constantly immersed... e.g. MySQL, firewalls, SAN storage, load balancers... There are others who are generalists and can navigate multiple technologies. All learn enough Linux (commands, processes) to do what they need and use on a daily basis. A differentiating factor between some of the staff is how well they embrace scripting, automation and configuration management methodologies. For instance, we have two engineers who do the bulk of Amazon AWS CloudFormation work, and another who handles most of the Puppet infrastructure. Perhaps a quarter of the engineers are adept at BASH shell scripting. Looking at this in the context of the incredibly high demand for DevOps skills in the job market, I'm curious how other organizations foster the development of these skills and grow their internal talent. Scripting doesn't seem like a particularly-teachable concept. How does a sysadmin improve their shell scripting? Is there still a place for engineers who do not/cannot keep up in the DevOps paradigm? Are we simply to assume that some people will be left behind as these technologies evolve? Is that okay?

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  • Locating memory leak in Apache httpd process, PHP/Doctrine-based application

    - by Sam
    I have a PHP application using these components: Apache 2.2.3-31 on Centos 5.4 PHP 5.2.10 Xdebug 2.0.5 with Remote Debugging enabled APC 3.0.19 Doctrine ORM for PHP 1.2.1 using Query Caching and Results Caching via APC MySQL 5.0.77 using Query Caching I've noticed that when I start up Apache, I eventually end up 10 child processes. As time goes on, each process will grow in memory until each one approaches 10% of available memory, which begins to slow the server to a crawl since together they grow to take up 100% of memory. Here is a snapshot of my top output: PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND 1471 apache 16 0 626m 201m 18m S 0.0 10.2 1:11.02 httpd 1470 apache 16 0 622m 198m 18m S 0.0 10.1 1:14.49 httpd 1469 apache 16 0 619m 197m 18m S 0.0 10.0 1:11.98 httpd 1462 apache 18 0 622m 197m 18m S 0.0 10.0 1:11.27 httpd 1460 apache 15 0 622m 195m 18m S 0.0 10.0 1:12.73 httpd 1459 apache 16 0 618m 191m 18m S 0.0 9.7 1:13.00 httpd 1461 apache 18 0 616m 190m 18m S 0.0 9.7 1:14.09 httpd 1468 apache 18 0 613m 190m 18m S 0.0 9.7 1:12.67 httpd 7919 apache 18 0 116m 75m 15m S 0.0 3.8 0:19.86 httpd 9486 apache 16 0 97.7m 56m 14m S 0.0 2.9 0:13.51 httpd I have no long-running scripts (they all terminate eventually, the longest being maybe 2 minutes long), and I am working under the assumption that once each script terminates, the memory it uses gets deallocated. (Maybe someone can correct me on that). My hunch is that it could be APC, since it stores data between requests, but at the same time, it seems weird that it would store data inside the httpd process. How can I track down which part of my app is causing the memory leak? What tools can I use to see how the memory usage is growing inside the httpd process and what is contributing to it?

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  • How to create partition when growing raid5 with mdadm.

    - by hometoast
    I have 4 drives, 2x640GB, and 2x1TB drives. My array is made up of the four 640GB partitions and the beginning of each drive. I want to replace both 640GB with 1TB drives. I understand I need to 1) fail a disk 2) replace with new 3) partition 4) add disk to array My question is, when I create the new partition on the new 1TB drive, do I create a 1TB "Raid Auto Detect" partition? Or do I create another 640GB partition and grow it later? Or perhaps the same question could be worded: after I replace the drives how to I grow the 640GB raid partitions to fill the rest of the 1TB drive? fdisk info: Disk /dev/sdb: 1000.2 GB, 1000204886016 bytes 255 heads, 63 sectors/track, 121601 cylinders Units = cylinders of 16065 * 512 = 8225280 bytes Disk identifier: 0xe3d0900f Device Boot Start End Blocks Id System /dev/sdb1 1 77825 625129281 fd Linux raid autodetect /dev/sdb2 77826 121601 351630720 83 Linux Disk /dev/sdc: 1000.2 GB, 1000204886016 bytes 255 heads, 63 sectors/track, 121601 cylinders Units = cylinders of 16065 * 512 = 8225280 bytes Disk identifier: 0xc0b23adf Device Boot Start End Blocks Id System /dev/sdc1 1 77825 625129281 fd Linux raid autodetect /dev/sdc2 77826 121601 351630720 83 Linux Disk /dev/sdd: 640.1 GB, 640135028736 bytes 255 heads, 63 sectors/track, 77825 cylinders Units = cylinders of 16065 * 512 = 8225280 bytes Disk identifier: 0x582c8b94 Device Boot Start End Blocks Id System /dev/sdd1 1 77825 625129281 fd Linux raid autodetect Disk /dev/sde: 640.1 GB, 640135028736 bytes 255 heads, 63 sectors/track, 77825 cylinders Units = cylinders of 16065 * 512 = 8225280 bytes Disk identifier: 0xbc33313a Device Boot Start End Blocks Id System /dev/sde1 1 77825 625129281 fd Linux raid autodetect Disk /dev/md0: 1920.4 GB, 1920396951552 bytes 2 heads, 4 sectors/track, 468846912 cylinders Units = cylinders of 8 * 512 = 4096 bytes Disk identifier: 0x00000000

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  • Road Warrior VPN Setup

    - by wobblycogs
    I apologise up front for the rather open ended nature of this question but I've got well out of my depth and could really do with some pointers. I need to set up a road warrior VPN solution which will allow our customers to securely access a number of services we provide for them. Customer machines will be running a variety of Windows versions from XP onwards with a variety of patch levels. Typically they will connect from the clients main offices but not always. It is safe to assume that all clients will be behind NATs but we may occasionally see a connection that isn't NAT'ed. Typical connection situation is therefore: Customer Laptop -- Router (NAT) -- Internet -- VPN Server + Firewall -- Server (Win 2008 R2, Non-routable IP) There will initially be a dozen or so people that could connect but that will grow quickly to around 100. It's unlikely that we'll see that many concurrent connections though, I imagine our total VPN throughput would be <50Mbps peak. What are my options for setting this up? I've been trying to set up a system like this using a MikroTik router for a few days but have struggled to get it working correctly, particularly with NAT'ed clients. I've had a quick look at OpenVPN and liked what I saw but I think it's unlikely our customers IT departments would allow the client to be installed. Finally I've looked at the Cisco ASA range but I'm on a fairly tight budget so this is less preferable but it looks like it would work pretty much out of the box. My fall back position is to connect the server directly and use the provided VPN + Firewall facilities but that is far from ideal as the number of servers is likely to grow over time.

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  • file system that allow to specify different RAID level per directory and change it afterward

    - by Adam Ryczkowski
    I have 5 hard drives, where I want to keep my data. Some of my files are more important, and some of them are less. So some of them I wish to put on RAID-6, and for some it RAID-5 is sufficient. It is difficult to predict at the moment of creation of the arrays how much space of each type to declare. What I would do if I didn't hear about zfs, is partition the hard drives into identical 100GB partitions, and as my needs grow, assemble those partitions into md devices using linux-raid. Then, I'd combine those devices using lvm into logical volumes where I'd put my data. So when I'd need more space of e.g. RAID-6, I'd take 100GB partition from each hard drive and assemble them into another RAID-6 md device and would use it as physical storage for the logical volume group dedicated for RAID-6 data. Then I could grow the file system on this logical volume. On top of RAID-6 and RAID-5 Volume Groups (managed by lvm) would reside completely independent file systems, which I'd later merge with multiple mount --bind into a single directory structure that would reflect the logical structure of data rather that of the storage. But now, when I heard about the ZFS with all the performance, data-healing and compression capabilities I cannot stop thinking if it can help me. If so, what do you think would be the best setup?

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