Question

Concerning Fault Tolerance, in your own words, what RAID configuration do you prefer and why? Regarding Backup options, define each and list pros and cons for each. When installing a Web Server, what are some of the critical components of this process?

Answer 1

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RAID Configuration :-

In a RAID exhibit, various hard drives join to shape a solitary stockpiling volume with no obvious creases or holes (in spite of the fact that, obviously, the capacity volume can be isolated into numerous allotments or iSCSI target volumes as required to suit your necessities).

RAID-5 has a little stunt to take the striping of RAID-0 and include a sprinkle of adaptation to non-critical failure. It's not the first to add excess to a RAID-0-like arrangement, however the entirety of the RAID levels between RAID-1 and RAID-5 have become out of date principally because of the development of RAID-5, so we can fudge our work a piece and state that RAID-5 is the following stage up from RAID-0.Like RAID-0, RAID-5 breaks the entirety of your information into lumps and stripes them over the hard drives in the cluster. In any case, it additionally includes a touch of its exceptional sauce, and this unique sauce is XOR equality.

RAID-5 circulates the entirety of its XOR equality information alongside the "genuine" information on your hard drives. In each stripe over the drives in the cluster, one square stores the equality information for the remainder of the squares. Since regardless of what number of drives you have, you still just need one equality esteem for each n obstructs, your RAID-5 cluster has n-1 drives of capacity limit whether you have three drives or three dozen. It's an entirely sweet arrangement—however on the off chance that you lose another hard drive before you can supplant the principal drive to fizzle, you'll lose your information.

RAID-5 offers execution increases like RAID-0 notwithstanding its ability and repetition gains, in spite of the fact that these additions are marginally decreased by both the measure of room the equality information takes up and by the measure of processing time and force it takes to do each one of those XOR figurings. Be that as it may, all things considered, RAID-5's financially savvy mix of RAID's triple advantages make it one of the most mainstream RAID levels by a long shot.

Pros and Cons of other models :-

RAID-2 utilized Hamming blunder revising codes rather than XOR or Reed-Solomon equality to give adaptation to non-critical failure, while RAID-3 and RAID-4 utilized XOR equality, yet held the entirety of the equality information on a solitary plate as opposed to conveying it over the circles as RAID-5 does. All in all, RAID-5 does pretty much everything these clusters do, just better. In this way those three RAID levels have, pretty much, gone the method for the dodo.

There are likewise settled RAID exhibits consolidating RAID-3, RAID-4, or RAID-6 with RAID-0 similarly RAID-50 joins RAID-5 with RAID-0. These tend not to see utilize either because of out of date quality (on account of RAID levels three and four) or cost-viability. RAID-60, requiring two drives for equality in each RAID-6 sub-exhibit, has amazing adaptation to internal failure yet low limit contrasted with other RAID clusters, and is increasingly costly to execute.

Components of Web Server :-

All servers have some key segments just as other, discretionary parts. Since we as a whole appreciate servers each time we go on the web, it is a smart thought to increase a fundamental outline of how they work by taking a gander at their individual segments.

To begin with, there's the motherboard. The most fundamental approach to think about the motherboard is a circuit board which interfaces each part of the server. The motherboard, more than some other component, is the core of the server.

The following basic part of a server is a CPU. This is otherwise called a processor. In the event that the motherboard is the PC's heart, the processor is its brain.When it goes to the exhibition, the processor is regularly the primary part which rings a bell. It's not by any means the only part that influences execution, yet its significance isn't to be trivialized. You'll have to become familiar with a decent arrangement about processors to guarantee you're getting a decent arrangement on a server. This is on the grounds that hosts may offer buyer grade processors or obsolete models instead of current gen server-grade CPUs.

RAM resembles our mind's momentary memory. It's basic to the exhibition of your server and the sum you use should scale up with your particular facilitating needs. Other than amount, there are quality contrasts in RAM.

Another essential part is the network association. Most servers are associated with a port which's velocities can shift and be set by the host.

There's the power supply. You don't have to think a lot about the power supply of a server aside from that it's there, and it's what controls all the segments in your server.