by Pedro M. S. Oliveira | Sep 12, 2009 | Linux
As a part of my work I have to design and plan Hardware, Systems and Software deployment, and as many of you guys know sometimes it’s not that easy. Dimensioning hardware for specific roles can be a pain, sometimes you don’t even have the software as it’s being “produced” by the development team and still you have to tell how many machines, routers, switches and all the small things the project will take.
But some other projects aren’t this difficult and you don’t need such an amount of flexibility to do them, you don’t need a custom based firewall cluster, you don’t need a web server or database cluster, you just need a simple, reliable and out of the box setup that make things work in the smallest amount of time.
When you need something like this many sys admins have an excellent way to things in a tested and production prof way (specially if they are open mined to use open source);
The Software Appliances
The appliances are really helpful but before you start using them you need to know a few things, so lets start by the bad:
- Lack of flexibility
- Hardware choices are often hard due to the lack of drivers/modules available
The lack of flexibility is probably the biggest problem with appliances, usually they aren’t inflexible but to master the appliance you’ll have to put a big effort on the manuals, this should’ t be a problem if you stick to a few appliances but if you use a lot of them then you’ll probably take more time to master them than to study the OS and all the applications your need (apache, samba, iptables, and so on). About hardware choices, appliances are suited to run on most hardware out there (after all they use a linux kernel, at least most of them do) but if you run cutting edge hardware you may find it hard to make it work with your appliance, specially if your appliance version as more than 6month-1year.
Let’s go to the good now:
- Easy installation.
- Fewer skills required.
- Dedicated support, sometimes paid, usually free from the community.
- Performance boost (In the cases where the appliance comes with it’s how hardware).
- Security.
So in conclusion appliances can be a great help, but they need extensive planning and testing before going to a production environment. Think not only about the present needs of your client but also about the future and expected ones. Bellow I’m going to write about my favorite software appliances and what are they for.
- dd-wrt – This is a great appliance for a bunch of Linksys, Asus, and another brand router, access point, home gateways, etc.
- Endian FW – Probably the appliance I use the most, you need firewall with a proxy server with content filtering? Do you need a VPN server or an antivirus scanner for your internet connection? Try this one.
- SME server – Do you need a windows domain server, a smtp server, pop server? Do you need to setup a small office in 2 hours? Choose SME server.
There are a lot of other appliances I’ve used since I’ve started working below a few honor mentions:
- GeexBox – For multimedia content displaying
- IPcop – Similar to endian (but endian has more features)
I’m done with appliances today, but you may wonder… what about the ugly? Well I didn’t find any that goes in this category, but the word goes well on the title 🙂 .
Cheers,
Pedro Oliveira
by Pedro M. S. Oliveira | Aug 25, 2009 | Daily life, Linux, Solaris
Usually I write about technical stuff, or my rc cars, but this time I’m going to write about cloud computing, which isn’t that technical.
While reading two magazines today one had in the cover “Cloud computing you can’t afford to leave this one out” and the other “Cloud computing a must for every company”.
So, if your in IT certainly heard about cloud computing, but lets start by defining cloud computing; cloud computing is is a style of computing in which dynamically scalable and often virtualized resources are provided as a service over the Internet. Users need not have knowledge of, expertise in, or control over the technology infrastructure in the “cloud” that supports them (Wikipedia definition).
Having said this you probably are using the cloud, if you use gmail,hotmail, or something like that, apart from the mail service you may be using picasa storage, dropbox, or even HI5 or Facebook to share photos and if you use a blog is probable that’s on the cloud too. But the cloud concept is wider. Imagine that your company as all the info on the cloud, all the applications that support your business, and that your systems are on the cloud too. You just leave your cheap PC clients, or thin clients, or whatever equipment you use to connect to the Internet and your piece of the cloud.
In theory this is a great tool, you won’t have to worry about uptime, backups, system maintenance, sys admins, power failures,air conditioning, but on the other end you’ll be dependent on your providers and your ISP. You won’t be free to change and you won’t be so versatile, your choices will be your providers choices and in the end applications and systems won’t be made to suit your needs but they’ll suit part of your needs and all your provider needs. Apart from that you’ll probably end spending more than you would if you had your own IT.
Sometime ago I was thinking in using amazon S3 for backing up my personal data, photos, personal movies, my documents, as well as my family ones. Right now I’ve a BackupPC on a server to do it all and backing up about 3.5TB of info. With my usage profile amazon would cost me about 350€ a month, so as fast as I though in using amazon I lost the idea of using it, with 2 month of service I could buy a new server to do all the backup and with another month of service I could pay electric bill,space, and man work hour for a year.
Then a client that happily uses Sugar CRM, heard about “the cloud” and thought that easily could migrate sugar to SalesForce and all the applications on the company to Google Apps. So we asked for prices and the price of the cloud was about 960% more than the regular prices of applications and Sugar licenses, and this including all the system maintenance, space and electric costs.
So I started wondering, in the end I don’t see people pay less for the cloud usage, I see people having a smaller initial cost that in the end will be much greater than the original one.
I’m sure many of you had already made your own investigations about the cloud? Are you getting to the same conclusions?
Till now I’ve been writing about costs, now lets get to flexibility and limitations.
Usually when talking about the cloud everyone sells you that the cloud is flexible, that the cloud will suit your needs and that it will grow when your business grow and get smaller when your business is going through a bad time.
In the end your cloud won’t be that flexible, most of “cloud providers” will have well established limits on amount of CPU usage/time, there will be limits on bandwidth, limits on connections per second and if you need to pass those limits you’ll be paying a lot for it. Then the small letter of the contract, sometimes you can have more processor power because you needed it but then you have to keep it for the minimum period, sometimes a year or even more.
But well the cloud is cutting edge innovation so this is something worth paying for. Once again this isn’t totally true, IBM as a cloud scheme running for decades, corporate clients may pay for processor, MIPs, processor time and memory usage. Apart from IBM, other companies worked like this for ages, companies like HP, SUN, and others.
So what’s new? In my opinion the news are the way you interact with the cloud, making the browser the central part and unification point. The larger bandwidth available today also made this possible and the content is much richer.
I can see a really good usage for the home user who don’t want to worry with tech things, I see youtube, twitter, hi5, facebook and others growing and companies using those with a business mind, honestly I don’t see companies putting their secrets, their know how, their experience, and their core on the hand of a cloud, I may be wrong but right now I don’t see it moving that way (maybe I need glasses). I see a big fuss on the cloud as I’ve seen the .com bubble and IT recession, I’ve seen the thin-client revolution and the virtualization boom, now I see the cloud hype and in a few months or years something new will come up and all this will be forgotten. I’ll see companies moving towards a new hype and I investors spending they bucks on something else.
So to conclude; I don’t think the cloud is a must, I think it’s something that you already had with a different name, and it became an hype because of a lot of marketing and publicity. If you think a little bit you’ll see who wins with all the hypes, usually isn’t your company nor mine.
Cheers,
Pedro Oliveira
