SSD High Speed Servers

SSD High Speed Servers Vs HDD Servers

“I consider high-speed data transmission an invention that became a major innovation. It changed the way we all communicate.”
Dean Kamen

Read more at http://www.brainyquote.com/search_results.html#ofULlmKaGFpFlQoO.99

The reason that the SSD vs. HDD debate is so important for the enterprise is the massive size and volume of today’s data. Part of the challenge is that this hugely growing data is threatening traditional computing infrastructure based on HDD, or hard disk drive storage.

The problem isn’t simply growth. If that’s all there was to it, then data center admins could simply slap more spindles, install a tape library, and send secondary data to the cloud where it becomes the provider’s issue to contend with. But the problem isn’t only growth; it is also the speed at which applications operate in their environment. Processor and networking speeds have kept up with application velocity and growth but production storage has some way to go.

Granted that computing bottlenecks may exist in other areas than just the HDD. Switches will fail, bandwidth can overload, VM hosts sometimes go down: nothing in the computing path is 100% reliable (even 99.9% can be a heady stretch).

Although, common census suggests that HDD disk drives are a major slowdown culprit in high IO environments. The nature of the mechanical device is the offending attribute.

11

 

The Important Factors

Very fast SSD performance is the increasingly popular fix for the mechanical disadvantage of the HDD. However, SSDs are not the automatic choice over HDDs in the server environment. First, one-to-one, SSD pricing is a good deal more expensive than HDDs. There are certainly factors that narrow the purchasing gap between SSDs and HDDs, and theoreticall the cost for SSDs can be less.
A second factor is what to actually replace: SSD performance will be faster than disk, but this does not necessarily mean that IT needs this performance level for secondary disk tiers – and over redundancy can result.
A third factor that mitigates against universal replacement is reliability: are SSDs really reliable enough to replace HDDS in the data center? Let’s be more precise: SSD/HDD reliability depends on numerous factors: usage, physical environment, application IO, vendor, mean time before failure (MTBF), and others. This is well served discussion topic, so to keep this performance/reliability discussion to a useful focus, let’s set some base assumptions:

 

1. We’ll discuss SSDs in data centers, not in consumer products like desktops or laptops. SSDs have a big place there especially for devices carried into hostile environments. However, the enterprise has a distinct set of requirements for storage based on big application and data growth, and the to-use-or-not-to-use question is critical in these data centers.
2. We’ll limit our discussion exclusively to NAND flash memory-based SSDs with the occasional foray into DRAM. This limits the universe of flash technology as the discussion point: DRAM is not a flash technology at all. And in the case of NAND SSDs, remember that while NAND is always flash, flash is not always NAND.
3. We’re leaving out discussion of other storage flash technologies, which lets out all-flash arrays with ultra-performance flash module components, or server-side flash-based acceleration including hybrid variants. These are big large factors in and of themselves but do not represent the majority of the SSD market today, particularly in mid-sized business and SMB.

 

fast-EXALT-728X90

 

Performance: SSD Wins

Hands down, SSD performance is faster. HDDs have the inescapable overhead of physically scanning disk for reads/writes. Even the fastest 15 RPM HDDs may bottleneck a high-traffic environment. Parallel disk, caching, and lots of extra RAM will certainly help. But eventually the high rate of growth will pull well ahead of the finite ability of HDDs to go faster.

DRAM-based SSD is the faster of the two but NAND is faster than hard drives by a range of 80-87% — a very narrow range between low-end consumer SSDs and high-end enterprise SSDs. The root of the faster performance lies in how quickly SSDs and HDDs can access and move data: SSDs have no physical tracks or sectors and thus no physical seek limits. The SSD can reach memory addresses much faster than the HDD can move its heads.12

The distinction is unavoidable given the nature of IO. In a hard disk array, the storage operating system directs the IO read or write requests to physical disk locations. In response, the platter spins and disk drive heads seek the location to write or read the IO request. Non-contiguous writes multiply the problem and latency is the result.

In contrast, SSDs are the fix to HDDs in high IO environments, particularly in Tier 0, high IO Tier 1 databases, and caching technologies. Since SSDs have no mechanical movement they accelerate IO requests far faster than even the fastest HDD.

21

 

Reliability: HDD Scores Points, but SSD isn’t far off

Performance may be a slam dunk but reliability is not. Granted that SSD’s physical reliability in hostile environments is clearly better than HDDs given their lack of mechanical parts. SSDs will survive extreme cold and heat, drops, and multiple G’s. HDDs… not so much.
However, few data centers will experience rocket liftoffs or sub-freezing temperatures, and SSD High Speed Servers have their own unique stress points and failures. Solid state architecture avoids the same type of hardware failures as the hard drive: there are no heads to misalign or spindles to wear out. But SSDs still have physical components that fail such as transistors and capacitors. Firmware fails too, and wayward electrons can cause real problems. And in the case of a DRAM SSD, the capacitors will quickly fail in a power loss. Unless IT has taken steps to protect stored data, that data is gone.
Wear and tear over time also enters the picture. As an SSD ages its performance slows. The processor must read, modify, erase and write increasing amounts of data. Eventually memory cells wear out. Cheaper consumer TLC is generally relegated to consumer devices and may wear out more quickly because it stores more data on a reduced area. (Thus goes the theory; studies do not always bear it out.)
For example, since the MLC stores multiple bits (electronic charges) per cell instead of SLC’s one bit, you would expect MLC SSDs to have a higher failure rate. (MLC NAND is usually two bits per cell but Samsung has introduced a three-bit MLC.) However, as yet there is no clear result that one-bit-per-cell SLC is more reliable than MLC. Part of the reason may be that newer and denser SSDS, often termed enterprise MLC (eMLC), has more mature controllers and better error checking processes.

special-2

The Final Thoughts?

So are SSD High Speed Servers more or less reliable than HDDs? It’s hard to say with certainty since HDD and SSD manufacturers may overstate reliability. (There’s a newsflash.) Take HDD vendors and reported disk failure rates. Understandably, HDD vendors are sensitive to disk failure numbers. When they share failure rates at all, they report the lowest possible numbers as the AFR, annualized (verifiable) failure rates.

This number is based on the vendor’s verification of failures: i.e., attributable to the disk itself. Not environmental factors, not application interface problems, not controller errors: only the disk drive. Fair enough in a limited sort of way, although IT is only going to care that their drive isn’t working; verified or not. General AFR rates for disk-only failures run between .55% and .90%.

However, what the HDD manufacturers do not report is the number of under-warranty disk replacements each year, or ARR – annualized rates of return. If you substitute these numbers for reported drive failures, you get a different story. We don’t need to know why these warrantied drives failed, only that they did. These rates range much, much higher from about 0.5% to as high as 13.5%.

 

Do we, as Webmasters, ultimately want SSD High Speed Servers Storage Advantage? Absolutely Yes. Although…

 

We have also heard stories relating to SSDs Storage Devices losing data when they are put into cold storage for extended periods although this discussion is ongoing. Not something we have directly encountered either.

Check your SEO Stats for Free!

Benefits of using Check SEO Stats

If you want to check SEO stats for your website then go to www.checkseostats.com and get tested! Go on do it!

Just type in the URL of your website to the search engine box and a lot of statistics will come out. They will tell you the areas where you need to improve on and the areas where you are already doing better. They give you the domain age. You better be aware of how long you bought your domain because if it is only for one year and you see it is already near 300 days old then it is going to expire soon. You would not want someone to steal your domain especially if you have a website name that a lot of people want. It will also give you the Alexa ranking which is the website’s traffic ranking out of the millions of websites in the world. You have to realize there are a lot of websites in the world so you don’t have to feel bad if it is ranked low. This ranking is something you should always monitor. If it goes up then you must be doing something right but if goes down then you must be doing something wrong. It will also display your Google Page Rank which is a rank on Google when a lot of people search your website. If it goes up to 1 or 2 then a lot of people go to your website via Google each and single day.

It is ideal to go back to the website every now and then as it is awesome to check SEO stats here as it gives the status on numerous things like the Malware detection. It will tell you if the website is free from malware and any other harmful codes. It will also indicate if it is safe to use by users so this website can also be used by people who would want to check out your website. If they see your site is not safe then that raises a red flag for them. They also give the status of Meta Tags which are the keywords, description and title. If the title is original then the status will most likely be good. This is why you must spend a lot of time thinking of a good title. If there is no description then that is a bad sign as it won’t take a long time to put one in. It can be one phrase that describes what the website is all about. For example, if it is a food blog then the description could be “Reviewing local restaurants one by one”. If it is an amusement park then it could go like “where the fun starts..”. If it does not have a description then you can expect the status to read “Bad”.

You have to put everything you have in your website since it is a representation of whatever it is you decide. It also gives the status of the site if it is online or not since some sites could be down due to the regular maintenance. There is also a possibility the site is hacked by some genius hackers. The response time is also indicated there and it is usually less than one second. It also lists down your scores for Google Backlinks, Google Indexed Pages, Bing Backlinks and Dmoz. It really pays off to exchange backlinks with other websites because that will increase your ranking in Google. Remember, Google is the search engine everyone goes to when they search for something so better get a high ranking there. It will also say whether or not the server IP is blacklisted or not. If it is blacklisted then it is means it is involved in some kind of online behavior that is unusual. The website also provides social stats including how much Facebook shares it gets as well as Twitter. If you got a social media team working for you then you will know if they have been effective or not. Other social media sites they keep track of are Pinterest, Linkedin, StumbleUpon and Google Plus. Social media is the best way to make your presence felt on the Internet so a good number there would definitely help.