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29%
Improving performance with environment variables
02.08.2021
Home »  Archive  »  2021  »  Issue 64: Bare...  » 
Lead Image © sgame, fotolia.com
.000137 3.817749 128 0.000313 13.408678 0.000572 7.330078 0.000381 10.995116 0.000656 6.392509 256 0.001808 18
29%
Warewulf Cluster Manager – Administration and Monitoring
21.08.2012
Home »  HPC  »  Articles  » 
=/vnfs The VNFS grew a little bit in size from the ganglia additions to 72.3MB, which is still pretty small. Now I can boot the compute node. Once it comes up (check this by ssh ing to the node as a user
29%
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
29%
Security first with the Hiawatha web server
11.04.2016
Home »  Archive  »  2016  »  Issue 32: Measu...  » 
Lead Image © Tatiana Popov, 123RF.com
-fastcgi are running, as expected. Listing 1 Process List root 589 0.0 0.3 142492 3092 ? Ss 20:35 0:00 nginx: master process /usr/sbin/nginx -g daemon on; master_process on; www
29%
Read-only file compression with SquashFS
14.08.2017
Home »  Archive  »  2017  »  Issue 40: Lean...  » 
Lead Image © modella, 123RF.com
:31 FS_scan.csv $ gzip -9 FS_scan.csv $ ls -lsah FS_scan.csv.gz 268K -rw-r--r-- 1 laytonjb laytonjb 261K 2014-06-09 20:31 FS_scan.csv.gz The original file is 3.2MB, but after using gzip with the -9
29%
Backups using rdiff-backup and rsnapshot
11.02.2016
Home »  Archive  »  2016  »  Issue 31: Tunin...  » 
Lead Image © Dmitry Pichugin, Fotolia.com
DestinationSizeChange 41943106 (40.0 MB) Another view of the file statistics lists which file effected the change: # gunzip -c /mnt/backup/rdiff-backup-data/file_statistics.\ 2015-03-15T10\:44\:06+01\:00.data.gz | awk '$2
29%
Analyzing Kernel Crash Dumps
25.11.2012
Home »  Articles  » 
 
 crash /proc/iomem   03000000-0affffff : Crash kernel [root@rhel ~]# grep crash /proc/cmdline ro root=/dev/mapper/VolGroup00-LogVol00 rd_NO_LUKS KEYBOARDTYPE=pc \ KEYTABLE=de-latin1-nodeadkeys rd
29%
Memory Errors
23.03.2016
Home »  HPC  »  Articles  » 
_scrub_rate     0 ue_count 0 csrow0           0 csrow3  0 csrow6  0 mc_name  0 seconds_since_reset  0 ue_noinfo_count In the /sys filesystem, for each csrow, a number of entries contain a lot of information
29%
Using rsync for Backups
07.01.2014
Home »  Articles  » 
 
a great deal of power in a few lines: rm -rf backup.3 mv backup.2 backup.3 mv backup.1 backup.2 cp -al backup.0 backup.1 rsync -a --delete source_directory/ backup.0/ To better understand the script, I
29%
Read-only File Compression with SquashFS
14.06.2017
Home »  HPC  »  Articles  » 
 -rw-r--r-- 1 laytonjb laytonjb 261K 2014-06-09 20:31 FS_scan.csv.gz The original file is 3.2MB, but after using gzip with the -9 option (i.e., maximum compression), the resulting file is 268KB. The .gz

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