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--- en:hpc [2022/04/14 13:23] – grikiete
+++ en:hpc [2022/04/14 13:51] – [Software] grikiete
@@ Line 3: / Line 3: @@
 A Distributed Computing Network (DCN) is a specially designed network of computers capable of running applications that can exchange data efficiently.
-VU MIF PST consists of a supercomputer from the clusters (the first number is the actual and available amount ):
+VU MIF PST consists of a supercomputer from the clusters (the first number is the actual and available amount):
 ^Title ^Nodes ^CPU ^GPU ^RAM        ^HDD    ^Network ^Notes|
@@ Line 13: / Line 13: @@
 The processor below = CPU = core - a single core of the processor (with all hyperthreads if they are turned on).
+====== Software ======
+**main** and **gpu** are installed [[https://docs.qlustar.com/Qlustar/11.0/HPCstack/hpc-user-manual.html|Qlustar 11]] operating system (OS) with Linux core. It is created Ubuntu 18.04 LTS based. **power** is installed Ubuntu 18.04 LTS.
+You can check the list of OS package with the command ''dpkg -l'' (in log in node **hpc** or in **power** nodes).
+With the command [[https://sylabs.io/guides/3.2/user-guide/index.html|singularity]] it is possible to make use of ready-made copies of container files in directories ''/apps/local/hpc'', ''/apps/local/nvidia'', ''/apps/local/intel'', ''/apps/local/lang'' or to download from singularity and docker online directories. You can also create your own singularity containers using the MIF cloud service.
+With singularity you can prepare your container, for example:
+<code shell>
+$ singularity build --sandbox /tmp/python docker://python:3.8
+$ singularity exec -w /tmp/python pip install package
+$ singularity build python.sif /tmp/python
+$ rm -rf /tmp/python
+</code>
+Similarly, you can use R, Julia or other containers that do not require root privileges to install packages.
+If you want to add OS packages to the singularity container, you need root/superuser privileges. With fakeroot, we simulate them, and copy the required library ''libfakeroot-sysv.so'' into the container, for example:
+<code shell>
+$ singularity build --sandbox /tmp/python docker://ubuntu:18.04
+$ cp /libfakeroot-sysv.so /tmp/python/
+$ fakeroot -l /libfakeroot-sysv.so singularity exec -w /tmp/python apt-get update
+$ fakeroot -l /libfakeroot-sysv.so singularity exec -w /tmp/python apt-get install python3.8 ...
+$ fakeroot -l /libfakeroot-sysv.so singularity exec -w /tmp/python apt-get clean
+$ rm -rf /tmp/python/libfakeroot-sysv.so /tmp/python/var/lib/apt/lists (you can clean up more of what you don't need)
+$ singularity build python.sif /tmp/python
+$ rm -rf /tmp/python
+</code>
+There are ready-made scripts to run your **hadoop** tasks using the [[https://github.com/LLNL/magpie|Magpie]] set in the directory ''/apps/local/bigdata''.
+With [[https://hpc.mif.vu.lt/hub/|JupyterHub]] galite interneto naršyklės pagalba vykdyti skaičiavimus su python komandų eilute ir pasinaudoti [[https://jupyter.org|JupyterLab]] aplinka. Jeigu savo namų kataloge instaliuosite savo JupyterLab aplinką, tai reikia instaliuoti papildomai ''batchspawner'' paketą - tada jums startuos jūsų aplinką, pvz:
+<code shell>
+$ python3.7 -m pip install --upgrade pip setuptools wheel
+$ python3.7 -m pip install --ignore-installed batchspawner jupyterlab
+</code>
+Taip pat jūs galite pasinaudoti savo pasidarytu konteineriu per JupyterHub. Tame konteineryje reikia instaliuoti ''batchswapner'' ir ''jupyterlab'' paketus bei sukurti script'ą ''~/.local/bin/batchspawner-singleuser'' su vykdymo teisėmis (''chmod +x ~/.local/bin/batchspawner-singleuser'')
+<code shell>
+#!/bin/sh
+exec singularity exec --nv myjupyterlab.sif batchspawner-singleuser "$@"
+</code>