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Using the MQTT IoT protocol for unusual but useful purposes

03.12.2015

Home » Archive » 2015 » Issue 30: OpenD... »

. Clients don't actually know whether they really see all the messages that arrive at the broker; the broker ACLS decide this. Messages transport payloads; payload data can also be binary and be up to 256MB

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NetFlow reporting with Google Analytics

10.06.2015

Home » Archive » 2015 » Issue 27: Fault... »

source nfdump [5] tool does this job on an existing Linux server or on a lean virtual machine (VM). A CPU core, 256MB of RAM, and a 2GB hard drive are sufficient for the VM. You can install on Cent

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Understanding the Status of Your Filesystem

18.06.2014

Home » HPC » Articles »

.59 64–128 12,083 3.11 90.70 128–256 8,623 2.22 92.93 256–512 13,437 3.46 96.39 512–1,024 5,456 1

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ClusterHAT

10.07.2017

Home » HPC » Articles »

with the original Raspberry Pi Model A, ranging from two to more than 250 nodes. That early 32-bit system had a single core running at 700MHz with 256MB of memory. You can build a cluster of five RPi3 nodes with 20

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Installing and operating the Graylog SIEM solution

13.12.2018

Home » Archive » 2018 » Issue 48: Secur... »

. The pwgen command generates a password and encrypts with sh256sum: pwgen -N 1 -s 100 echo -n | sha256sum The encrypted password is then assigned to the parameter root_password_sha2. Table 1 gives

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Error-correcting code memory keeps single-bit errors at bay

14.11.2013

Home » Archive » 2013 » Issue 17: Cloud... »

Controller login2$ ls -s /sys/devices/system/edac/mc/mc0 total 0 0 ce_count 0 csrow1 0 csrow4 0 csrow7 0 reset_counters 0 size_mb 0 ce_noinfo_count 0 csrow2 0 csrow5 0 device 0 sdram

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Open source mail archiving software compared

09.08.2015

Home » Archive » 2015 » Issue 28: SSD RAID »

Lead Image © Alexander Dedrin, 123RF.com

, confirming the license, and answering the prompt for the Max Heap Size (256MB is fine for test operations). The installation routine automatically launches the main process. You can stop this later, or restart

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Ansible collections simplify AIX automation

05.08.2024

Home » Archive » 2024 » Issue 82: Sover... »

your very first Ansible controller, the IBM Redbook, Using Ansible for Automation in IBM Power Environments [12], is a great reference; particularly section 3.3, "Installing your Ansible control node

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File Compression for HPC

10.11.2021

Home » HPC » Articles »

the extension .lz4 to the compressed file, indicating the method of compression. lz4 has 12 compression levels (1 -12 ). For maximum compression, use: $ lz4 -12 file.data You can also enable ultrafast

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Safeguard and scale containers

05.12.2016

Home » Archive » 2016 » Issue 36: Autom... »

Version: v1 02 kind: Pod 03 metadata: 04 name: nginx 05 spec: 06 containers: 07 - name: nginx 08 image: nginx 09 ports: 10 - containerPort: 80 A replication controller [12], however

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