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29%
Mounting Compressed Archives as a User
25.01.2022
Home »  HPC  »  Articles  » 
 articles.tar.gz archivetest $ ls -s archivetest/ARTICLES total 4406    0 BCACHE                          0 INTERNET002             0 OCFS2    0 BEFORE                          0 IOSTAT                  0 PEARC21    0 BTRFS
29%
Monitor Your Nodes with collectl
28.03.2012
Home »  HPC  »  Articles  » 
--------><----------Disks-----------><----------Network----------> #cpu sys inter ctxsw KBRead Reads KBWrit Writes KBIn PktIn KBOut PktOut 3 1 1421 2168 0 0 41000 90 0 2 0 0 3 2 1509 2198 64 2 49712
29%
NVDIMM and the Linux kernel
11.10.2016
Home »  Archive  »  2016  »  Issue 35: Persi...  » 
Lead Image © Denis Dryashkin, 123RF.com
with dmesg # dmesg | grep BIOS-e820 [ 0.000000] e820: BIOS-provided physical RAM map: [ 0.000000] BIOS-e820: [mem 0x0000000000000000-0x000000000005efff] usable [ 0.000000] BIOS-e820: [mem 0x
29%
NVDIMM Persistent Memory
22.09.2016
Home »  HPC  »  Articles  » 
not persistent. Listing 1: Showing Memory with dmesg # dmesg | grep BIOS-e820 [    0.000000] e820: BIOS-provided physical RAM map: [    0.000000] BIOS-e820: [mem 0x0000000000000000-0x000000000005efff
29%
Understanding Layer 2 switch port security
22.12.2017
Home »  Archive  »  2017  »  Issue 42: Secur...  » 
Lead Image © Taffi, Fotolia.com
-table count Mac Entries for Vlan 1: --------------------------- Dynamic Address Count : 3 Static Address Count : 0 Total Mac Addresses : 3 Total Mac Address Space Available: 6021 In a MAC flooding attack
29%
Improving performance with environment variables
02.08.2021
Home »  Archive  »  2021  »  Issue 64: Bare...  » 
Lead Image © sgame, fotolia.com
in different, conceivably better, performance. The test system is my Linux laptop (see Table 1 for specifications). The laptop runs Ubuntu 20.04 with the 455.45.01 NVidia driver, and CUDA 11.2. Octave 5.2.0
29%
Error-correcting code memory keeps single-bit errors at bay
14.11.2013
Home »  Archive  »  2013  »  Issue 17: Cloud...  » 
Lead Image © Igor Stevanovic, 123RF.com
. For example, a byte (8 bits) with a value of 156 (10011100) that is read from a file on disk suddenly acquires a value of 220 if the second bit from the left is flipped from a 0 to a 1 (11011100) for some
29%
Monitoring Performance with sar
05.03.2014
Home »  Articles  » 
 3.5.0-44-generic (hercules)         03.12.2013      _x86_64_        (2 CPU)    09:46:03      runq-sz  plist-sz   ldavg-1   ldavg-5  ldavg-15   blocked 09:46:13            1       468      0.02      0.06      0.14         0
29%
Collecting and evaluating performance data over a period of time
20.03.2014
Home »  Archive  »  2014  »  Issue 19: Perim...  » 
Lead Image © Sergey Nivens, 123RF.com
) w Task creation and task-switching activity y TTY activities Listing 1 Query with Interval and Number jcb@hercules:# sar -q 10 2 Linux 3.5.0-44-generic
29%
Finding and recording memory errors
11.04.2016
Home »  Archive  »  2016  »  Issue 32: Measu...  » 
Lead Image © lightwise, 123RF.com
on disk; if the second bit from the left is flipped from a 0 to a 1 (11011100), the number becomes 220. A simple flip of one bit in a byte can make a drastic difference in its value. Fortunately, ECC memory

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