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Questions tagged [solid-state-drive]

SSD SUPPORT IS OFF-TOPIC. General HDD/SSD support may be asked on Super User (https://superuser.com). A solid-state drive (SSD) is a flash disk similar to a thumb drive, but much faster and with a hard-disk interface, typically SATA.

A solid-state drive is a storage medium based on high-performance flash memory. Most SSD have the same logical interfaces as hard disks (e.g. SATA ). SSDs can be distinguished from HDDs by not having any moving mechanical components.

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Force no more than one write/sync to disk in X seconds

I'm worried that I see through the disk LED and iotop quite some write activity every couple of seconds, mostly coming from the chromium's processes, on a completely idle system. It doesn't make any sense at all to have such a high number of writes…
brauliobo
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Is it safe to make many small writes per second to an SSD?

I have an application which receives several hundred strings per second, about fifty bytes long, over the network. I want to cache these to an SSD for further processing. Is it safe for the SSD if I perform several hundred ~50 byte file-append…
user3247400
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RDS IOPS limits

As I understand it General Purpose SSD's on an RDS instance have an IOPS limit based on the disk size until you get to 1TB when you can infinitely burst at 3000 IOPS. Once you have a 1TB disk you can burst continuously at 3000 but I can't find any…
James
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Install Android Studio and SDK on SSD or Mechanical Disk Drive

I have just upgraded to a new Intel Core i7 (4th gen) PC featuring a 512gb SSD, about 5TB of mechanical storage, and 16GB of DDR3 ram. I am now planning to set up the Android SDK and Android studio. I was wondering, on my old computer the Android…
Andrew S
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Why is swap not good when using a SSD?

On Digitalocean I came up with this message when I want to add swap: Although swap is generally recommended for systems utilizing traditional spinning hard drives, using swap with SSDs can cause issues with hardware degradation over time. Due to…
yoano
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Parallel I/O SSD vs HDD surprising results

I have a very strange situation happening with some of my tests regarding paralell I/O. Here is the situation.. I have multiple threads opening a file handler to the same file and reading from multiple locations of the file (evenly spaced intervals)…
Zahari
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Is it possible for code to change without Git knowing about it?

This morning I ran my tests and there are 2 failures. But I haven't changed any code for a few days and all tests were passing. According to Git, there are no changes (except for coverage.data, which is the test output). gitk shows no other…
B Seven
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Key/Value store extremely slow on SSD

What I am sure of : I am working with Java/Eclipse on Linux and trying to store a very large number of key/value pairs of 16/32 bytes respectively on disk. Keys are fully random, generated with SecureRandom. The speed is constant at ~50000…
Kai Elvin
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SSD vs. tmpfs speed

I made a tmpfs filesystem in my home directory on Ubuntu using this command: $ mount -t tmpfs -o size=1G,nr_inodes=10k,mode=0777 tmpfs space $ df -h space . File system Size Used Avail. Avail% Mounted at tmpfs …
Green绿色
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SSD raw I/O benchmarks with random read/write

My laptop has a SSD disk that has 512 byte physical disk sector size and 4,096 byte logical disk sector size. I'm working on an ACID database system that has to bypass all OS caches, so I write directly from allocated internal memory (RAM) to the…
user152949
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SSD drives not accessible in EC2 ubuntu Instances

In the following EC2 instance types which have SSD drives r3.2xlarge r3.4xlarge i2.xlarge When I login through SSH, I am unable to see the SSD drives. I was trying "df -h". I have tried reboot, but that did not help. tried to terminate and…
sandeepkunkunuru
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Cassandra with SSD - two disks or one?

It's generally recommended that cassandra use two separate disks: one for the commit log and the other for everything else. However, in what appears to be a recent update to the configuration guidelines, the following phrase appears: For SSDs it is…
David Semeria
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Will SSD drive make maven builds faster?

Good post here says speed better with SSD drive for Eclipse work. But my slow part is mostly for maven builds. I have project with 1600+ classes. It take 2-3 min for a clean build with maven. I wonder if SSD drive will make it faster? Because SSD…
Blazej Kowalski
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improving concurrent file read with ssd and mmap

I have huge meteorological files. Too big for fitting in ram. I need to perform a lot of concurrent random reads. So, I think SSD + mmap could improve performance. But what's about concurrent mmap reads ? How should they be organized ?
user1219721
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How I can know if the disk is a SSD?

I need to create a T volume, T is created, but I also need a new U volume if the disk is a ssd, how i can do it ? What is the batch command to know if I'm a SSD ? [...] set /a VOL_SIZE= %MINSIZE_MB% /2 set VOL_TYPE=simple if %NDISK% GTR 1 set…
Awesome JSF
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