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16%
Fundamentals of I/O benchmarking
11.04.2016
Home »  Archive  »  2016  »  Issue 32: Measu...  » 
Lead Image © Kheng Ho Toh, 123RF.com
if less data is requested. Listing 3 IOPS on a Hard Disk # iops /dev/sdb /dev/sdb, 1.00 TB, 32 threads: 512 B blocks: 76.7 IO/s, 38.3 KiB/s (314.1 kbit/s) 1 KiB blocks: 84.4 IO/s
16%
Speed up your MySQL database
11.02.2016
Home »  Archive  »  2016  »  Issue 31: Tunin...  » 
Lead Image © Mikhail Dudarev, 123RF.com
wkB/s avgrq-sz avgqu-sz await r_await w_await svctm %util sda 2.00 8.00 2.00 9500.00 16.00 151948.00 31.99 1.07 0.11 4.00 0.11 0.09 88.40 If your read or write
16%
GNU Parallel: Multicore at the Command Line with GNU Parallel
04.11.2011
Home »  HPC  »  Articles  » 
the six entries are less than the default of nine jobs allowed to start at once. Listing 3: Processing the Files in Parallel 01 $ find . | parallel ‑v 'echo $(ls ‑1 /proc/self/task); sleep 1s; echo {}' 02
16%
Distributed storage with Sheepdog
07.10.2014
Home »  Archive  »  2014  »  Issue 23: 10 Ti...  » 
Lead Image © kateleigh, 123RF.com
's S3. Scalability, (high) availability, and manageability were and still are the essential characteristics that Sheepdog seeks to provide. For Morita, setting up Ceph, which already existed at that time
15%
A closer look at hard drives
18.07.2013
Home »  Archive  »  2013  »  Issue 15: What’...  » 
Lucy Baldwin, 123RF
_UNCORRECTABLE_EXT command 59 * {READ,WRITE}_DMA_EXT_GPL commands 60 * Segmented DOWNLOAD_MICROCODE 61 * Gen1 signaling speed (1.5Gb/s) 62 * Gen2 signaling speed (3
15%
Using Expect scripts to automate tasks
31.10.2025
Home »  Archive  »  2012  »  Issue 12: NAS S...  » 
© Kheng Ho Toh, 123RF.com
conservatively originally 21 if {$force_conservative} { 22 set send_slow {1 .1} 23 proc send {ignore arg} { 24 sleep .1 25 exp_send -s -- $arg 26 } 27 } 28
15%
Filesystem Murder Mystery
09.04.2019
Home »  Archive  »  2019  »  Issue 50: Bpfilter  » 
Lead Image © Lucy Baldwin, 123RF.com
in mv ubuntu@aws:~/slow-mv$ strace -t mv 3GB.copy 3GB 19:00:09 execve("/bin/mv", ["mv", "3GB.copy", "3GB"], 0x7ffd0e7dddf8 /* 21 vars */) = 0 19:00:09 brk(NULL) = 0x55cd7d1ce000
15%
Warewulf 4
13.12.2022
Home »  HPC  »  Articles  » 
 Packages: (1/6): dhcp-common-4.3.6-47.el8.noarch.rpm                       902 kB/s | 206 kB     00:00     (2/6): dhcp-libs-4.3.6-47.el8.x86_64.rpm                         3.1 MB/s | 147 kB     00:00     (3
15%
Monitor Your Nodes with collectl
28.03.2012
Home »  HPC  »  Articles  » 
/log/collectl -r00:00,7 -m -F60 -s+YZCD --iosize ################################################################################ # Collectl: V3.6.1-4 HiRes: 1 Options: -p localhost-20120310-133840.raw.gz -P -f
15%
Exploring the most famous performance tool
16.08.2018
Home »  Archive  »  2018  »  Issue 46: CMS S...  » 
Lead Image © Lucy Baldwin, 123RF.com
use across Linux and BSD distributions. Figure 1 shows top version 3.3 on a stock Fedora system. The first line of the dynamically updated display lists the current time, the system's uptime, the number

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