Questions tagged [storage]

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Distributed Storage for Access and Preservation

My organization wants to maintain multiple copies of data in order to preserve access in the case of localized disasters as well as for the purpose of long term preservation. Are there accepted formal ...
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62 views

Extending the causal memory model to wide-area distributed storage systems

In the seminal paper "Causal memory: definitions, implementations, and programming", distributed causal memory is defined to ensures that all the processes in a system agree on the relative ordering ...
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0answers
49 views

What data structure should I use for storing my data?

I am currently looking for a way in which I can store my data, and quickly look it up. What currently seem to be the best idea is to use a hash map. reasons: To identify what item I am looking for, ...
3
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0answers
124 views

Representing Computations on Transcendental Numbers

Consider the set of transcendental numbers that are not compressible to a finite base-2 representation. How can I compute multiples (more generally, any algebraic computation) of one of these numbers,...
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48 views

Can you read a file as a binary number?

This is a pretty naive question, but I would like to better understand the basics of information storage on a computer. I am not concerned with the detail of how any one operating system achieves ...
2
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1answer
408 views

What exactly is a "binary file"?

I suspect this may be more of a concept / theory question, but, I haven't been able to wrap my brain around what exactly a binary file is. I've read links such as the below: https://en.wikipedia.org/...
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27 views

Does Nand Flash Type Affect the Read Latency Based on Page Content?

In general, we have these types of NAND flash cells: SLC, MLC, TLC, and QLC. Since MLC flash cells can store 2 bits, the content of the cell can be 00, 01, 10, or 11 which are detected using different ...
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2answers
5k views

Difference between Sequential ,Direct and Random acess with their acess time

I'm stuck on a point while reading about these different accessing methods. As per author. Sequential access Memory is organized into units of data, called records.Access must be made in a ...
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18 views

Why do we need volume as an abstraction on top of partition?

I'm curious about what do we need volume as an abstraction on top of hardware partition? What problem it tries to solve? What is the limitation of this concept?
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121 views

Regarding Amdahl's balanced system law

One of the paper titled "Rules of Thumb in Data Engineering" (Jim Gray et. el.) mentions some calculations based on Amdahl's balanced system law. Link to paper: https://www.microsoft.com/en-us/...
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31 views

How extended logical blocks are mapped to physical device pages?

I'm reading "Decibel: Isolation and Sharing in Disaggregated Rack-Scale Storage" (PDF). On page 6, the author illustrates the concept of "Extended Logical Block"), which is similar to "Data Integrity ...
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0answers
541 views

How to calculate multibit trie storage size?

I wish to use a multi-bit trie structure for storing IPv4 forwarding information with a fixed stride width of 8 bits, I think this is also called a "radix of 8" (so for any IP prefix 4 levels will ...
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55 views

Does writing more data to disk consume more energy than writing less?

As the title says, I am wondering if writing more data (i.e. larger files) to disk (e.g. Tablet SSDs) will consume more energy than smaller files. My expected answer is "yes, because larger files ...
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56 views

How are files managed in a filesystem?

I have recently been interested in low level computer science (as a hobby), and I have just learned about the way a computer organizes and stores information on a hard drive. I have learned the basics ...
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44 views

Should we consider number of surfaces in a disk while calculating effective data transfer rate?

Suppose a disk has Number of surfaces: 8 Number of sectors per track: 20 Sector size: 4000B Number of tracks: 10 It is rotating at 360 rpm. So disk is reading data from one track at an instance....
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84 views

Maximum number of disks in RAID with parity?

From what I understand, to implement RAID 5, one would need a minimum of 3 disks, where 2 would be for data storage, and the third would be for the parity. But what is the maximum number of disks one ...
-1
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1answer
178 views

Latency vs IOPS. How can one conflict with the other?

I was reading about latency and IOPS, and I understood what they mean and their significance in the storage world. But what I do not understand (many places it is mentioned) is that how can the ...