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Reading and understanding database execution plans
31.10.2025
Home »  Archive  »  2012  »  Issue 12: NAS S...  » 
© Gunnar Pippel, 123RF.com
s 04 4> JOIN employees e ON (s.employee_id = e.employee_id) 05 5> WHERE s.sale_date > trunc(sysdate) - INTERVAL '6' MONTH 06 6> AND s.eur_value >= 10; 07 Explained. 08 09 SQL> select * from table
10%
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
10%
A Distributed SQL Database
03.08.2023
Home »  Archive  »  2023  »  Issue 76: Energ...  » 
Photo by Sonika Agarwal on Unsplash
, contiguous chunks called ranges, which are typically 64MB in size. These ranges are replicated across multiple nodes by the Raft consensus algorithm, ensuring strong consistency and fault tolerance. On top
10%
Single sign-on with SSSD, LDAP, and Kerberos
30.11.2025
Home »  Archive  »  2010  »  Issue 2: Backup...  » 
Anja Kaiser; Fotolia
posixaccount /etc/dirsrv/schema/10rfc2307.ldif objectClasses: ( 1.3.6.1.1.1.2.0 NAME 'posixAccount' DESC 'Standard LDAP objectclass' SUP top AUXILIARY MUST ( cn $ uid $ uidNumber $ gidNumber $ home
10%
Comparing 5 to 50TB NAS storage boxes
31.10.2025
Home »  Archive  »  2012  »  Issue 12: NAS S...  » 
© Franck Boston, fotolia.com
of important features). All of the NAS devices in our lab used Intel processors and supported popular RAID levels, at least 1 and 5; the better devices also offered a dual-parity variant like RAID 6. (See
10%
Installing and operating the Graylog SIEM solution
13.12.2018
Home »  Archive  »  2018  »  Issue 48: Secur...  » 
Lead Image © Leo Blanchette, 123RF.com
SeverityValue = 3; else $SyslogSeverityValue = 6; 20 21 # The name of the file is also sent with the file 22 Exec $FileName = file_name(); 23 24 # The SourceName variable is set by default to 'NXLOG'. To send
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Command-line tools for the HPC administrator
22.12.2017
Home »  Archive  »  2017  »  Issue 42: Secur...  » 
Lead Image © Vasyl Nesterov, 123RF.com
=> /lib64/libpthread.so.0 (0x00007f5bc524a000) libpgc.so => /opt/pgi/linux86-64/16.10/lib/libpgc.so (0x00007f5bc4fc2000) librt.so.1 => /lib64/librt.so.1 (0x00007f5bc4dba000) libm.so.6 => /lib64
10%
Predicting Drive Doom
20.10.2013
Home »  HPC  »  Articles  » 
a freshly installed CentOS 6.4 distribution on a newly built system with smartmontools installed using yum . I also made sure the smartmontools daemon, smartd , starts with the system by using chkconfig
10%
Let the Editor Wars Begin!
25.08.2016
Home »  HPC  »  Articles  » 
are in is one of the earliest aspects of vi that need to be mastered. Figure 1 shows vi running running in Normal mode on my Linux CentOS 6.8 desktop. At the bottom of the screen is the colon (: ) prompt
10%
Virtualization with KVM
29.06.2011
Home »  CloudAge  »  Articles  » 
 
memory to the existing machines. Luckily, KVM became an official component of all Linux kernels as of version 2.6.20. In other words, you only need to install Qemu and a couple of tools. Most

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