Performance – do ssds reduce the usefulness of databases – database administrators stack exchange

I only heard about Robert Martin today, and it seems like he’s a notable figure in the software world, so I don’t mean for my title to appear as if it’s a click bait or me putting words in his mouth, but this is simply how I interpreted what I heard from him with my limited experience and understanding.

I was watching a video today (on software architecture), on a talk by Robert C. Database yml Martin, and in the latter half of the video, the topic of databases was the main focus.

He discussed how with HDDs/spinning disks, retrieving data is slow. Database in excel However, these days we use SSDs, he noted.


G info database He starts off with “RAM is coming” and then continues by mentioning RAM disks, but then says he can’t call it RAM disk, so resorts to just saying RAM. Database book So with RAM, we don’t need the indexes, because every byte takes the same time to get. Q prime database ( this paragraph is paraphrased by me)

So, him suggesting RAM (as in computer memory) as a replacement for DBs (as that’s what I interpreted his statement as) doesn’t make sense because that’s like saying all the records are in-memory processed in the lifetime of an application (unless you pull from a disk file on demand)

So, I resorted to thinking by RAM, he means SSD. Top 10 data recovery tools So, in that case, he’s saying SSDs reduce the usefulness of databases. Data recovery laptop He even says “If I was Oracle, I’d be scared. Data recovery flash drive The very foundation of why I exist is evaporating.”

From my little understanding of SSDs, unlike HDDs, which are O(n) seek time (I’d think), SSDs are near O(1), or almost random. Data recovery cost So, his suggestion was interesting to me, because I’ve never thought about it like that.

I concluded the primary role of a database is essentially being a very indexed filesystem (as well as optimizations, caching, concurrent access, etc), thus, if indexes aren’t needed in SSD, this kind of does make databases less useful.

Regardless of that though, prefacing that I’m a newb, I find it hard to believe that they become less useful, as everyone still uses DBs as the primary point of their application, instead of pure filesystem, and felt as if he was oversimplifying the role of databases.

To TL;DR my question, does the advent of widespread SSD use in the server market (whether it’s upcoming or has happened already) reduce the usefulness of databases?

It seemed like what the presenter was trying to convey was that with SSDs, one can store the data on disk, and not have to worry about how slow it would be to retrieve it as with older HDDs, as with SSDs, seek times are near O(1) (I think). Data recovery galaxy s5 So, in the event of that being true, that would hypothetically lose one of the advantages it had: indexing, because the advantage of having indexes for faster seek times is gone.

Based on your post, it appears the clear message is that RDBMS lookup time optimizations are being replaced with hardware which makes IO time negligible.

This is absolutely true. Database key field SSD on database servers combined with high (actual) RAM makes IO waiting significantly shorter. Data recovery nashville However, RDBMS indexing and caching is still of value because even systems with this huge IO boon can and will have IO bottlenecks from poorly performing queries caused by bad indexing. Data recovery minneapolis This is typically only found under high workload applications or poorly written applications.

The key value to RDBMS systems in general is data consistency, data availability, and data aggregation. Database 4 net Utilizing an excel spreadsheet, csv file, or other method of keeping a “data base” yields no guarantees.

SSD doesn’t protect you from your primary server become unavailable for any reason (network, OS corruption, power loss). Iphone 6 data recovery software free SSD doesn’t protect you from a bad data modification. Database usa reviews SSD doesn’t make it faster to run analytics compared to “just having” them.

Uncle Bob probably was talking about in-memory databases such as Redis or Gemfire. Easeus data recovery 94fbr In these databases, everything in the database really is contained in RAM. Database join The database could start out empty and be filed with short-lived data (being used as a cache) or it start by loading everything in from disk and periodically checkpoint changes to disk.

This is becoming more and more popular because RAM is getting cheap, and it becomes feasible to have a terabyte of data stored in an in-memory clustered database. H2 database download There are a lot of use cases where the speed from having instant access to things makes it valuable to put in RAM rather than even a fast disk like SSD. H2 database url You can even continue using SQL for some of these if it makes sense.

Why should this worry Oracle? Data is growing and it’s unlikely that RDBMSes will go away. Data recovery boot disk However, a lot of Oracle’s engineering time over the years has gone into ways to make data retrieval on spinning disks really fast. 990 database Oracle will need to adapt to a completely different storage tier. Data recovery hard drive cost They are, with Oracle Database In Memory, but they’re exposed to different competition than in the past. Data recovery knoxville Think of how much time has gone into making sure the query optimizer chooses the right strategies based on the layout of things on disk….

I would say just the opposite. 7 data recovery keygen Since read/write speeds are so fast, now you can get a GPU accelerated database (e.g. H2 database client BlazingDB or Alenka) to crunch numbers even faster. Dayz database Now you can have even more complex queries run faster. I phone data recovery Now queries which people wouldn’t even consider running can be run at a reasonable speed. Database 3d The more complex, and the more data the better off you are – cybernard

While Bob Martin has been around for a long time and his opinions are generally worth listening to (if not agreeing with :-), in this case I think he’s diving into the “The Death Of Relational Databases Is Upon Us” crowd (of which I’m an associate member :-). Yorku database For some things under limited circumstances a somewhat convincing argument can be made that non-relational database technologies can provide an edge. O o data recovery That having been said, however, IMO the relational model, flawed in various and sundry ways as it may be, still provides the best general purpose database model available today. Data recovery illustrator YMMV. Database management software – Bob Jarvis

The primary reason that we use databases isn’t because disks are slow (indeed, originally, that was cited as a reason not to use databases), but rather because data is complicated. Database normalization example The primary purpose of a database is to enable multiple apps/users to be able to find the correct data and even to be able to simultaneously alter it in a controlled manner. Database virtualization Doing that quickly is only a secondary goal of databases. Data recovery machine – RBarryYoung

RDBMS isn’t going away anytime soon; they’re the best choice for some types of application, and NoSQL (Mongo, etc.) is the best choice for others. Data recovery cell phone Horses for courses. Data recovery wizard free – sh1rts

banner