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Questions tagged [tmpfs]

tmpfs is a common name for a temporary file storage facility on many Unix-like operating systems.

It is intended to appear as a mounted file system, but stored in volatile memory instead of a persistent storage device. A similar construction is a RAM disk, which appears as a virtual disk drive and hosts a disk file system.

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docker-compose tmpfs not working

I have a docker-compose file that I'm trying to secure by making the root volumes of the containers it creates read-only. Relevant parts of docker-compose.yml: version: '2' services: mysql: image: mariadb:10.1 read_only: true tmpfs: …
koehn
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Build a Docker image using docker build and a tmpfs?

Question: How do you specify in a Dockerfile, or on the docker build command line, that you would like to have a tmpfs mounted in the build container? This is in the context of a split build - the first container, which would use the RAM disk,…
fdmillion
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docker tmpfs seems to have no effect on postgresql

I have a Postgres database inside a docker container against which I run django tests. I want to improve the speed of the tests. The easiest way to do this (it seems to me) is to move postgres data into tmpfs volume. Here's what I did: docker run…
Vladimir S.
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scala-io, moving file from tmpfs too slow

I faced up with a strange scala-io moveTo method issue. Here is my filesystem, tmp directory resides in ram. ~ % df -Th ~/ :) Filesystem Type Size Used Avail Use% Mounted…
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docker/docker-compose tmpfs - pgsql_tmp directory

Has anyone tried running a postgresql container with a tmpfs volume mount to pgsql_tmp? (any database with a temp files directory i would imagine) Has it caused any problem? Is this a bad idea? Additional helpful info? docker tmpfs - "As opposed to…
silentpete
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write(2)/read(2) atomicity between processes in linux

I have a case where there are two processes which act on the same file - one as a writer and one as a reader. The file is a one line text file and the writer re-writes the line in a loop. reader reads the line. The pseudo code looks like…
Vineeth Pillai
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Time complexity of finding duplicate files in bash

I had to write a Bash script to delete duplicate files today, using their md5 hashes. I stored those hashes as files in a temporary directory: for i in * ; do hash=$(md5sum /tmp/msg | cut -d " " -f1) ; if [ -f /tmp/hashes/$hash ] ; then …
Ted
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dd fail to write to tmpfs

I'd like to measure tmpfs performance by using dd. But it fail, like below: # dd if=/dev/zero of=/tmp/128M bs=4M count=32 oflag=direct dd: failed to open ‘/tmp/128M’: Invalid argument Any help?
user3170177
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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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Run entire docker container with volumes mounted in memory

I would like to run entire docker container in memory without mapping volumes to host's hard drive. TMPFS described here helps to mount volumes as "memory volumes", but I'm looking a way how to start entire container mapped to…
Victor Perov
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GitLab: Mount /builds in build image as tmpfs

In our GitLab CI environment we have a build server with lots of RAM but mechanical disks, running npm install takes a long time (I have added cache but it still needs to chew through existing packages so cache cannot solve all of this alone). I…
tirithen
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There is not enough space available in tmpfs docker container

I'm running a docker container that seems to have insufficient memory and I'm not sure how to solve this problem. I'm essentially running a program on this docker container that downloads an image into tmpfs, performs some operations, deletes the…
Peter Dolan
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Bind tmpfs or ramfs to a specific memory node

I'm working on a NUMA server which has two memory nodes. I want to create a file system which will be loaded in main memory like tmpfs or ramfs and I want to bind it to a specific memory node. In other words I don't want the ramfs contents to be…
user3761809
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tmpfs mount for dockerfile

I want to mount a tmpfs filesystem in docker container. For this I am passing mount command like this: docker run --mount type=tmpfs,destination=/tempdisk,tmpfs-mode=770,tmpfs-size=4m --name projectname projectname:latest The above command is…
abc def
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Different sql explains on two servers. "Copying to tmp table" is extremely slow

I have a query that executes less time on dev server than on prod (database is the same). Prod server is much more efficient (64gb ram, 12 cores, etc). Here's the query: SELECT `u`.`id`, `u`.`user_login`, `u`.`last_name`, …
Satevg
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