Why Should I Check Out a MySQL-Based Column Database ?
Some technologies come on the information technology landscape and stay, providing long-lasting benefits, whereas others are more of a short term fad and ultimately end up disappearing because the value they supplied was too niche oriented and/or they were quickly supplanted by another technology that is better. Recently, articles, blogs, analyst reports, and other media outlets have been noting the rise and usage of column-oriented databases in the areas of data warehousing, analytics, and other business intelligence/read-intensive situations. And on the MySQL front, there are a couple of column DB's that are now available for you to use. Are column-oriented databases a technology that is destined to stay and provide long-term benefits or will it be relegated to the forgotten pile of other software that came on the scene quickly and then disappeared?
Hi,
My input file
Gene1 1
Gene1 2
Gene1 3
Gene1 0
Gene2 0
Gene2 0
Gene2 4
Gene2 8
Gene3 9
Gene3 9
Gene4 0
Condition:
If the first column matches, then look in the second column. If there is a value of zero in the second column, then don't consider that record while averaging.
... (5 Replies)
Hi team,
How can I implement a users in MySQL database for Apache users, assuming that I'm using RHEL6. That is to say, how can I design this database and how let's Apache server know those user in this database.
Thanks in advance.. (3 Replies)
I have a configuration file namely: abcd, that will be use for some service (like gammu)
Inside that configuration file:
number1 = 66673527
number1 = 8373272
How can I make the file to search the number1 and number2 from a mysql database?
Any help will be very appreciated. Thanks (1 Reply)
Dear All,
Can I make Mailx to read recipient address from a mysql database?
I already tried emailing with bash script:
SUBJECT="TEST"
export EMAIL_ADDRESS=`mysql -uroot -pabcde smsd -e "SELECT email FROM recipient"`
mysql -uroot -pabcde smsd -e "SELECT ID, SenderName, Body FROM inbox" |... (14 Replies)
Dear All,
Can I make Mailx to read recipient address from a mysql database?
I already tried emailing with bash script:
SUBJECT="TEST"
export EMAIL_ADDRESS=`mysql -uroot -pabcde smsd -e "SELECT email FROM recipient"`
mysql -uroot -pabcde smsd -e "SELECT ID, SenderName, Body FROM inbox" |... (2 Replies)
Hi All,
Thanks in Advance!!
How to backup a particular Databases..through Bash script!!
For example i have 6 databases;
Anish
linux
Software
Questions
Rhce
Google
these are the databases i have from that i want to take "Anish" and "questions" database backup regularly.... (4 Replies)
SYSTEMD-DETECT-VIRT(1) systemd-detect-virt SYSTEMD-DETECT-VIRT(1)NAME
systemd-detect-virt - Detect execution in a virtualized environment
SYNOPSIS
systemd-detect-virt [OPTIONS...]
DESCRIPTION
systemd-detect-virt detects execution in a virtualized environment. It identifies the virtualization technology and can distinguish full
machine virtualization from container virtualization. systemd-detect-virt exits with a return value of 0 (success) if a virtualization
technology is detected, and non-zero (error) otherwise. By default, any type of virtualization is detected, and the options --container and
--vm can be used to limit what types of virtualization are detected.
When executed without --quiet will print a short identifier for the detected virtualization technology. The following technologies are
currently identified:
Table 1. Known virtualization technologies (both VM, i.e. full hardware virtualization, and container, i.e. shared kernel virtualization)
+----------+----------------+--------------------------------------+
|Type | ID | Product |
+----------+----------------+--------------------------------------+
|VM | qemu | QEMU software virtualization, |
| | | without KVM |
| +----------------+--------------------------------------+
| | kvm | Linux KVM kernel virtual machine, |
| | | with whatever software, except |
| | | Oracle Virtualbox |
| +----------------+--------------------------------------+
| | zvm | s390 z/VM |
| +----------------+--------------------------------------+
| | vmware | VMware Workstation or Server, and |
| | | related products |
| +----------------+--------------------------------------+
| | microsoft | Hyper-V, also known as Viridian or |
| | | Windows Server Virtualization |
| +----------------+--------------------------------------+
| | oracle | Oracle VM VirtualBox (historically |
| | | marketed by innotek and Sun |
| | | Microsystems), |
| | | for legacy and KVM |
| | | hypervisor |
| +----------------+--------------------------------------+
| | xen | Xen hypervisor (only domU, not dom0) |
| +----------------+--------------------------------------+
| | bochs | Bochs Emulator |
| +----------------+--------------------------------------+
| | uml | User-mode Linux |
| +----------------+--------------------------------------+
| | parallels | Parallels Desktop, Parallels Server |
| +----------------+--------------------------------------+
| | bhyve | bhyve, FreeBSD hypervisor |
+----------+----------------+--------------------------------------+
|Container | openvz | OpenVZ/Virtuozzo |
| +----------------+--------------------------------------+
| | lxc | Linux container implementation by |
| | | LXC |
| +----------------+--------------------------------------+
| | lxc-libvirt | Linux container implementation by |
| | | libvirt |
| +----------------+--------------------------------------+
| | systemd-nspawn | systemd's minimal container |
| | | implementation, see systemd- |
| | | nspawn(1) |
| +----------------+--------------------------------------+
| | docker | Docker container manager |
| +----------------+--------------------------------------+
| | rkt | rkt app container runtime |
+----------+----------------+--------------------------------------+
If multiple virtualization solutions are used, only the "innermost" is detected and identified. That means if both machine and container
virtualization are used in conjunction, only the latter will be identified (unless --vm is passed).
OPTIONS
The following options are understood:
-c, --container
Only detects container virtualization (i.e. shared kernel virtualization).
-v, --vm
Only detects hardware virtualization).
-r, --chroot
Detect whether invoked in a chroot(2) environment. In this mode, no output is written, but the return value indicates whether the
process was invoked in a chroot() environment or not.
--private-users
Detect whether invoked in a user namespace. In this mode, no output is written, but the return value indicates whether the process was
invoked inside of a user namespace or not. See user_namespaces(7) for more information.
-q, --quiet
Suppress output of the virtualization technology identifier.
-h, --help
Print a short help text and exit.
--version
Print a short version string and exit.
EXIT STATUS
If a virtualization technology is detected, 0 is returned, a non-zero code otherwise.
SEE ALSO systemd(1), systemd-nspawn(1), chroot(2), namespaces(7)systemd 237SYSTEMD-DETECT-VIRT(1)
