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44%
I/O benchmarks with Fio
30.11.2025
Home »  Archive  »  2011  »  Issue 5: Pen Te...  » 
© Kheng Ho Toh, 123RF.com
creates a 256MB file in the current directory along with process for the job. This process reads complete file content in random order. Fio records the areas that have already been read and reads each area
44%
Speed up your MySQL database
11.02.2016
Home »  Archive  »  2016  »  Issue 31: Tunin...  » 
Lead Image © Mikhail Dudarev, 123RF.com
defaults for Table Definition Cache, from 256 to 400, would be sufficiently dimensioned for this example. Query Cache The next relevant MySQL parameter from the SQL area is the Query Cache. This should
44%
A Btrfs field test and workshop
31.10.2025
Home »  Archive  »  2012  »  Issue 11: Cloud...  » 
© Adrian Hillman, 123RF.com
System, DUP: total=8.00MB, used=4.00KB Metadata, DUP: total=1.00GB, used=79.20MB If Btrfs only has one device available when the filesystem is created, it automatically generates a duplicate
42%
Comparing 5 to 50TB NAS storage boxes
31.10.2025
Home »  Archive  »  2012  »  Issue 12: NAS S...  » 
© Franck Boston, fotolia.com
extensions who offer lower equipment specs and target a smaller range of applications. When it comes to actual storage, NAS storage systems are not so wildly different (see Tables 1-3 for a comparison
42%
Baselines are more important than  the  benchmark
06.10.2022
Home »  Archive  »  2022  »  Issue 71: Kuber...  » 
Lead Image © Lucy Baldwin, 123RF.com
bytes (419 MB, 400 MiB) copied, 0.535233 s, 784 MB/s root@focal:~# dd if=/dev/zero of=/dev/mapper/encrypted-ram0 bs=4k count=100k 102400+0 records in 102400+0 records out 419430400 bytes (419 MB, 400 Mi
42%
Managing Storage with LVM
07.11.2023
Home »  HPC  »  Articles  » 
 the last command as an example, an option to specify the extent size would be: # vgcreate -s 8M vg0 /dev/sdb1 /dev/sdd The -s 8M  option specifies a PE size of 8MB when the VG is created. You can change
42%
Server distributions for small businesses tested
11.02.2016
Home »  Archive  »  2016  »  Issue 31: Tunin...  » 
Lead Image © wabeno, 123RF.com
. The Koozali Foundation [3], from the US, has been responsible for the software, which was released under the GPL, since 2013. Weighing in at just 640MB for the 64-bit version and just under 600MB for the 32-bit
41%
Get the best out of your bandwidth with tc
30.11.2025
Home »  Archive  »  2012  »  Issue 10: Traff...  » 
© Russell Shively, 123RF.com
protocol ip parent 1:0 prio 100 u32 match ip $DIR 5.4.3.2 flowid 1:14 06 tc filter add dev $DEV protocol ip parent 1:0 prio 100 u32 match ip $DIR 4.3.2.1 flowid 1:14 Step Away from the Bandwidth I
40%
Desktop Supercomputers: Past, Present, and Future
17.03.2021
Home »  HPC  »  Articles  » 
of 1,800W (120 × 15 = 1,800), and a 20A circuit has a capability of 2,400W. The US National Electrical Code (NEC) rules and best practices state that the design wattage for typical residents is 80
40%
Tuning I/O Patterns in Python
18.12.2013
Home »  HPC  »  Articles  » 
(One-by-One) 1 #include 2 3 /* Our structure */ 4 struct rec 5 { 6 int x,y,z; 7 float value; 8 }; 9 10 int main() 11 { 12 int counter; 13 struct rec my_record; 14 int counter_limit; 15

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