Implementation of SQL Server native data from XML to generate JSON data instance code, xmljson
Example code for generating JSON data from XML with SQL Server native data
SQL Server is a relational database, and the query results are usually datasets. However, in some special situations, we need XML data. In the past few years, JSON has been used as a common data interchange format for webapis, how does the database generate JSON data? Today I wrote a DEMO.
1. Create tables and test data
SET NOCO
root. If you ' re trying to do them using and you'll need to change the sudo syntax slightly to something like these:$ sudo sh -c ‘echo 1 >/proc/sys/vm/drop_caches‘$ sudo sh -c ‘echo 2 >/proc/sys/vm/drop_caches‘$ sudo sh -c ‘echo 3 >/proc/sys/vm/drop_caches‘Note: There's a more esoteric version of the above command if you ' re to that:$ echo "echo 1 > /proc/sys/vm/drop_caches" | sudo shWhy the syntax? The program /bin/echo is running as root, because sudo of, and the shell that ' s redirecting
monitoring, the report output is 3 seconds apart, and the report outputs 10 results, you can run the following command:There are many parameters available in the Dstat command, which you can view with the Man Dstat command, and most of the commonly used parameters are:Versatile tool for generating system resource Statisticsdstat options:-C,--cpu enable CPU stats-c 0,3 , total include cpu0, CPU3 and total-d,--disk enable disk
length
#前置追加key中的value值, successfully returned stored, failed to return not_stored
Prepend MyKey 0 60 5
INCR Key num
#给key中的value增加num. If the key is not a number, NUM will be used to replace the value. Returns the added value
Incre MyKey 1
Decr
#同上
Ditto
Delete key [Key2 ...]
Delete one or more key-value. Successful delete returns deleted, no failure is returned not_found
Delete MyKey
Flush_all [Tim
backup back to DISK = N (TestDB)‘F:\SQLTEST\TestDB.bak‘With noformat,noinit, NAME = N‘testdb-Full Database backup', SKIP, Norewind, nounload, STATS =10go--Second emulated incremental backup DATABASE [TestDB] to DISK = N‘F:\SQLTEST\TestDBUpdate.trn‘With differential, Noformat, noinit, NAME = N‘testdb-Differential Database backup', SKIP, Norewind, nounload, STATS =10go--Third transaction log backups backup l
requirements, and we can provide an argument in the Profile.run () function, which is to save the file name of the output, and again, in the command-line arguments, we can add one more parameter to hold the output of the profile.customizing reports with PstatsProfile solves one of our needs, and there is a need: To view the output in many forms, we can solve it through another class of stats. Here we need to introduce a module pstats, which defines a
from October until the end of this year, and will continue to launch 50 PS VR games, with exclusive "Star Wars: Battlefront" VR version.In a previous public event, Sony had shown a number of virtual reality games, claiming that at least 30 games would be launched with the device when the product was officially launched.The latest news shows that Sony has confirmed the list of 70 or so games. Among them are the iron Fist of Bandai South Dream Palace 7
/haproxy. pid maxconn 4000 user haproxy group haproxy daemon # turn on stats unix socket stats socket/var/lib/haproxy/stats # response # common defaults that all the 'listen' and 'backend' sections will # use if not designated in their block # revoke defaults log global log 127.0.0.1 local3 mode http option httplog option dontlognull retries 10 option redispatch
Python scripts monitor docker containers and pythondocker containers
This article provides an example of how to monitor docker containers using python scripts for your reference. The details are as follows:
Script Function:
1. Monitor CPU usage
2. Monitor memory usage
3. Monitor network traffic
Code:
#! /Usr/bin/env python # -- * -- coding: UTF-8 -- * -- import sysimport tabimport reimport osimport timefrom docker import Clientimport commandskeys_container_stats_list = ['blkio _
Logstash 5.0 starts with an API that outputs the metrics and status monitoring of its own processes.
Official documents:Https://www.elastic.co/guide/en/logstash/current/monitoring-logstash.html#monitoring
Node Info APIHttps://www.elastic.co/guide/en/logstash/current/node-info-api.htmlPipeline Gets pipeline-specific information and settings.OS Gets Node-level info about the OS.JVM Gets Node-level JVM info, including info about threads.
Curl-s ' Localhost:9600/_node/pipeline '? prettyCurl-s ' Loca
the result less than 0 o'clock, the result will be 0. The "incr" command does not overflow.StateThe command "stats" is used to query the server's running state and other internal data. There are two types of formats. With no parameters:stats\r\nThis will then output the status, setting values, and documentation. Another format with some parameters:Stats Through Various statesAfter being subjected to the "stats
: Same as uid, but the user name is used;
-Stats:
-Node: defines the name of the current node. It is used when multiple haproxy processes share the same IP address in the HA scenario;
-Description: The description of the current instance;
* Performance Adjustment Parameters
-Maxconn
-Maxpipes
-Noepoll: Disable the epoll mechanism on Linux;
-Nokqueue: Disable the kqueue mechanism on the BSE system;
-Nopoll: Disable the poll mechanism;
-Nosepoll: Dis
Name spaceThe client has a lot of namespaces and can often burst out of the functionality he manages. namespaces correspond to the endpoints of various elasticsearch management. The following is a list of the completed namespaces:
name Space
function
Indices ()
Index-centric statistics and information
Nodes ()
Node-centric statistics and information
Cluster ()
Cluster-centric statistics and information
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