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16%
A Btrfs field test and workshop
31.10.2025
Home »  Archive  »  2012  »  Issue 11: Cloud...  » 
© Adrian Hillman, 123RF.com
, Fedora) to postpone the move to Btrfs as the standard filesystem. Conveniently, the latest long-term support version of Ubuntu, 12.04, was released at the end of April based on kernel version 3
16%
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
16%
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
15%
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
15%
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
14%
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
14%
When I/O workloads don't perform
02.08.2021
Home »  Archive  »  2021  »  Issue 64: Bare...  » 
Lead Image © Viacheslav Iakobchuk, 123RF.com
- 400 10 Spin_Retry_Count 0x0013 100 099 --- Pre-fail Always - 0 12 Power_Cycle_Count 0x0032 100 100 --- Old_age Always - 135 184 End
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%
Performance testing monitoring solutions
30.11.2025
Home »  Archive  »  2012  »  Issue 07: Xen v...  » 
© Kheng Ho Toh, 123RF.com
machine. On the basis of these hardware conditions, I gradually increased the number of checks, starting with 1,000 checks, then moving up to 1,400, and finally 2,200. Figure 3 shows how Nagios latency
14%
Persistent Memory
14.01.2016
Home »  HPC  »  Articles  » 
DRAM. At the extreme, you can pretty much buy systems with 1-2TB of memory, but you probably don't buy too many of them because of cost. Typical compute nodes are in the 64-256GB range. Persistent memory

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