nvme ssd vs ssd

shown below: Vm.swappiness=0 kernel.shmmax=21474836480 net.core.rmem_max=4194304 net.core.wmem_max=4194304 kernel.sem=50100 64128000 50100 1280 vm.dirty_background_bytes=33554432 4. When using XFS, the default block size for PostgreSQL is 8KiB, but in the current Linux environment, running "Mount XFS" will eject the "feature not implemented" error, so the block size should be adjusted to 4KiB. An increase in the number of allocation groups means that more paral

the 500mb/s! 2, physical characteristics, low power consumption, no noise, vibration, low heat, small size, operating temperature range. Solid state drives do not have mechanical motors and fans, with a noise value of 0 decibels at work. The solid-state hard disk based on flash memory has lower energy consumption and calorific value under working state. There is no mechanical moving parts, no mechanical failure, no fear of collision, shock, vibration. Most solid-state drives can work in-10~70

So far, I have been running the master Informix development database server on SSD for more than a year. My development server is equipped with 12 CPU cores, 24 gb ram, 5 TB disk space, and a 5 gb ssd. I used this server to develop the Informix Data Warehouse project and run So far, I have been running the master Informix development database server on SSD for mo

Can ssd be used as a redo disk? 1. ssd has write wear and tear, and the ssd write performance is not very good. ssd is only very good for random reading, because it does not need to be searched. Ssd is easy to damage. 2. index tablespace and temporary tablespace are good cho

SSD provides incredible performance for the storage system, which is 10 times higher than the fastest mechanical hard disk. However, because SSD write performance is affected by block erasure latency, SSD is usually used as a read device. However, this does not mean that SSD does not improve the write performance. In f

When asked whether traditional raid can be built on SSD, the first response should be "yes, but trim command support is required ". On the Internet, we can also see that many people use SSD to create raid, but basically it is configured as RAID 0 or raid 1. Few people will build RAID5. Why? The answer is very simple. If you configure parity-raid like RAID 5 on the basis of

Can traditional RAID be built on SSD? When asked whether traditional RAID can be built on SSD, the first response should be "yes, but Trim command support is required ". On the Internet, we can also see that many people use SSD to create RAID, but basically it is configured as RAID 0 or RAID 1. Few people will build RAID5. Why? The answer is very simple. If you c

Years later, the use of their spare time and intermittent will caffe SSD source read, although the middle due to work for a period of time, but finally completed successfully, SSD source reading is also this year's annual plan of the more important one of the content, completed or very fulfilling. after reading the code, one of the biggest experience is that before the paper a lot of confused my details now

I haven't updated my blog for a long time. A while ago, I experienced my first job hopping, which is much harder than I thought. After all, it was the first job and it was quite sad to leave. The new job has just begun, and we hope everything will go well. This blog was written during May 1, and is officially posted today. It is a good habit to write a technical blog. I want to keep it! When I was in the previous job, I always wanted to try Flash/SSD

Focus on SSDs has been around for some time, the previous few years SSD capacity is small, more importantly, its limited life and expensive prices so that SSD can only be used as a storage area of the accelerated media exist, if anyone who want to use SSD as a disk array, the system is a bit too crazy. As a result, in previous years, both academia and industry ha

What is a solid state drive and how long is the SSD life?SSD refers to the use of flash memory chip composed of SSD SSD, is the use of flash flash memory particles as a storage unit, no longer using traditional mechanical storage methods, the use of simulated virtual hard disk access and sectors, etc., can also simply

As SSD How to use? How do you look at 4k alignment? 　　About as SSD software: As SSD is a professional SSD (SSD) transmission Speed Test tool, it can not only test the speed of solid-state hard disk reading, but also can detect

What is SSD? A Solid State Disk (Solid State Disk or Solid State Drive), also known as an electronic hard Disk or Solid State electronic Disk, is a hard Disk consisting of a control unit and a Solid State storage unit (DRAM or FLASH chip. The interface specifications, functions, and usage of SSD are the same as those of common hard disks, and the product shape and size are also the same as those of common h

Do you want to partition your SSD? Some people say that SSD is best not to partition, will affect the use of performance and life, is this so? On the SSD is good or not partition good, is a more interesting question, which will involve a lot of SSD related knowledge, the following small series to detailed introduction.

performance will also be reduced, not one upgrade in place, may need to upgrade again in the future. But this kind of collocation for young users, especially for the game, large-capacity program hosting needs of large users, if your budget is not sufficient, but also willing to try to do the operation, in the original volume of the capacity of this disk at the same time with SSDs to improve the performance of the platform, but also suitable. [Programme III: M.2+sata

PCIe SSD introduction and application (I), pciessd introduction and application SSD with SATA/SAS interfaces has been available for more than a decade and has been widely used in the personal consumption field. However, its performance still cannot fully meet the high throughput and low latency requirements of enterprise users, A few years ago, the world's first PCIe interface

OSX: it may not be a good idea to enable the ssd trim function. A long time ago, since people started loading SSD to Mac machines and OSX began to support TRIM, people began to pay attention to enabling the TRIM function of OSX to optimize SSD performance, this is the slowest operation for SSD, especially when there ar

The use case is simple, I want to use both SSD disks and SATA disks within the same machine and ultimately create pools pointing to SSD or SATA disks. in order to achieve our goal, we need to modify the crush map. my example has 2 SATA disks and 2 SSD disks on each host and I have 3 hosts in total. To revoke strate, please refer to the following picture: I. Cr

From: http://yblog.org/archive/index.php/11734 The biggest difference between an SSD and a general traditional hard drive is that its memory-to-life ratio is limited, and the fast Memory (flash memory) in the same data area) SSD memory uses a special algorithm built in the control chip to evenly distribute data to the fast-moving memory chip in different regions. For Ubuntu Linux, my Acer 3750g laptop is Ub