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14%
Fundamentals of I/O benchmarking
11.04.2016
Home »  Archive  »  2016  »  Issue 32: Measu...  » 
Lead Image © Kheng Ho Toh, 123RF.com
(512 MB) copied, 49.1424 s, 10.4 MB/s If you want to empty the read and write cache for benchmark purposes, you can do so using: sync; echo 3 > /proc/sys/vm/drop_caches Sequential access
14%
The Aurora Mesos Framework
09.08.2015
Home »  Archive  »  2015  »  Issue 28: SSD RAID  » 
Lead Image © Anton Gvozdikov, 123RF.com
resources = Resources(cpu = 0.1, ram = 20*MB, disk = 20*MB), 09 processes = [hello_world_process]) 10 11 hello_world_job = Job( 12 cluster = 'test', 13 role = os.getenv('USER'), 14 task = hello
14%
Small-board computers
17.02.2015
Home »  Archive  »  2015  »  Issue 25: Safe...  » 
Lead Image © Author, 123RF.com
Xino-Lime Linux All-winner A10 processor Single ARM Cortex-A8 @1GHz Mali-400   512MB DDR3 SATA connector, 2 USB, Fast Ethernet, USB OTG, HDMI 1.9W $44/EUR 30
14%
Network monitoring with Icinga and Raspberry Pi
17.02.2015
Home »  Archive  »  2015  »  Issue 25: Safe...  » 
Lead Image © AndreaDanti, 123RF.com
} 07 define service{ 08 use generic-service 09 host_name w2k12srv 10 service_description Uptime 11 check_command check_nt!UPTIME 12 } 13 define service
14%
Linux Writecache
19.11.2019
Home »  HPC  »  Articles  » 
, ioengine=libaio, iodepth=32 fio-3.1 Starting 1 process Jobs: 1 (f=1): [w(1)][100.0%][r=0KiB/s,w=1401KiB/s][r=0,w=350 IOPS][eta 00m:00s] test: (groupid=0, jobs=1): err= 0: pid=3104: Sat Oct 12 14:39:08 2019   write: IOPS=352
14%
Process, Network, and Disk Metrics
26.02.2014
Home »  HPC  »  Articles  » 
 reqs merged:           3.76/s     Write reqs completed:            2.12/s    Read BW:                     0.01 MB/s  Write BW:                        0.02 MB/s    Avg sector size issued      25.28       Avg
14%
CPU affinity in OpenMP and MPI applications
03.02.2022
Home »  Archive  »  2022  »  Issue 67: syst...  » 
Lead Image © podfoto, 123RF.com
,32 1,33 2,34 3,35 4,36 5,37 6,38 7,39 8,40 9,41 10,42 11,43 12,44 13,45 14,46 15,47 16,48 17,49 18,50 19,51 20,52 21,53 22,54 23,55 24,56 25,57 26,58 27,59 28,60 29,61 30,62 31,63 The lstopo tool
14%
Get the best out of your bandwidth with tc
30.11.2025
Home »  Archive  »  2012  »  Issue 10: Traff...  » 
© Russell Shively, 123RF.com
later on, but in the meantime, the following is a class configuration line: tc class add dev $DEV parent 1:1 classid 1:12 cbq bandwidth $BAND rate 25Mbit allot 1514 cell 8 weight 2500Kbit prio 3 maxburst
14%
Using the MQTT IoT protocol for unusual but useful purposes
03.12.2015
Home »  Archive  »  2015  »  Issue 30: OpenD...  » 
Lead Image © Heiko Küverling, 123RF.com
(msg.payload)) 07 08 mqtt = paho.Client() 09 mqtt.on_message = on_message 10 11 mqtt.connect("localhost", 1883, 60) 12 mqtt.subscribe("linux/+", 0) 13 14 mqtt.loop_forever() The client now connects
14%
Speed up your MySQL database
11.02.2016
Home »  Archive  »  2016  »  Issue 31: Tunin...  » 
Lead Image © Mikhail Dudarev, 123RF.com
( NULL, 'Row 3', NULL); SELECT SLEEP(1); 08 09 mysql> INSERT INTO data_random VALUES ( MD5(CURRENT_TIMESTAMP()), 'Row 1', NULL); SELECT SLEEP(1); 10 mysql> INSERT INTO data_random VALUES ( MD5(CURRENT

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