Tutorial by Examples: cluster

Indexes can have several characteristics that can be set either at creation, or by altering existing indexes. CREATE CLUSTERED INDEX ix_clust_employee_id ON Employees(EmployeeId, Email); The above SQL statement creates a new clustered index on Employees. Clustered indexes are indexes that dict...

Example uses basic HTTP syntax. Any <#> in the example should be removed when copying it. You can use the _cat APIs to get a human readable, tabular output for various reasons. GET /_cat/health?v <1> The ?v is optional, but it implies that you want "verbose" output. _...

$ pg_dumpall -f backup.sql This works behind the scenes by making multiple connections to the server once for each database and executing pg_dump on it. Sometimes, you might be tempted to set this up as a cron job, so you want to see the date the backup was taken as part of the filename: $ post...

If you need to apply a setting dynamically after the cluster has already started, and it can actually be set dynamically, then you can set it using _cluster/settings API. Persistent settings are one of the two type of cluster-wide settings that can be applied. A persistent setting will survive a fu...

If you need to apply a setting dynamically after the cluster has already started, and it can actually be set dynamically, then you can set it using _cluster/settings API. Transient settings are one of the two type of cluster-wide settings that can be applied. A transient setting will not survive a ...

Example uses basic HTTP syntax. Any <#> in the example should be removed when copying it. You can use the _cat APIs to get a human readable, tabular output for various reasons. GET /_cat/health <1> _cat/health has existed since Elasticsearch 1.x, but here is an example of its output...

Example uses basic HTTP syntax. Any <#> in the example should be removed when copying it. Like most _cat APIs in Elasticsearch, the API selectively responds with a default set of fields. However, other fields exist from the API if you want them: GET /_cat/health?help <1> ?help cau...

Example uses basic HTTP syntax. Any <#> in the example should be removed when copying it. The _cat APIs are often convenient for humans to get at-a-glance details about the cluster. But you frequently want consistently parseable output to use with software. In general, the JSON APIs are meant...

curl -XGET 'http://www.example.com:9200/myIndexName/_count?pretty' Output: { "count" : 90, "_shards" : { "total" : 6, "successful" : 6, "failed" : 0 } } The index has 90 documents within it. Reference Link: Here

When using clustered index, the rows of the table are sorted by the column to which the clustered index is applied. Therefore, there can be only one clustered index on the table because you can't order the table by two different columns. Generally, it is best to use clustered index when performing ...

Nonclustered indexes are stored separately from the table. Each index in this structure contains a pointer to the row in the table which it represents. This pointers are called a row locators. The structure of the row locator depends on whether the data pages are stored in a heap or a clustered tab...

TODO

With a clustered index the leaf pages contain the actual table rows. Therefore, there can be only one clustered index. CREATE TABLE Employees ( ID CHAR(900), FirstName NVARCHAR(3000), LastName NVARCHAR(3000), StartYear CHAR(900) ) GO CREATE CLUSTERED INDEX IX_Clustered O...

Non-clustered indexes have a structure separate from the data rows. A non-clustered index contains the non-clustered index key values and each key value entry has a pointer to the data row that contains the key value. There can be maximum 999 non-clustered index on SQL Server 2008/ 2012. Link for r...

es = Elasticsearch(hosts=hosts, sniff_on_start=True, sniff_on_connection_fail=True, sniffer_timeout=60, sniff_timeout=10, retry_on_timeout=True)

Clustering is about grouping similar objects together. It is widely used for pattern recognition. Clustering comes under unsupervised machine learning, therefore there is no training needed. PHP-ML has support for the following clustering algorithms k-Means dbscan k-Means k-Means separates ...

If you want to have a table organized in column-store format instead of row store, add INDEX cci CLUSTERED COLUMNSTORE in definition of table: DROP TABLE IF EXISTS Product GO CREATE TABLE Product ( ProductID int, Name nvarchar(50) NOT NULL, Color nvarchar(15), Size nvarchar(5)...

CREATE CLUSTERED COLUMNSTORE INDEX enables you to organize a table in column format: DROP TABLE IF EXISTS Product GO CREATE TABLE Product ( Name nvarchar(50) NOT NULL, Color nvarchar(15), Size nvarchar(5) NULL, Price money NOT NULL, Quantity int ) GO CREATE CLUSTERED C...

package main import ( "fmt" "k8s.io/client-go/1.5/kubernetes" "k8s.io/client-go/1.5/pkg/api/v1" "k8s.io/client-go/1.5/tools/clientcmd" ) func main() { config, err := clientcmd.BuildConfigFromFlags("", <kube-config-path&g...

A single instance of Node.js runs in a single thread. To take advantage of multi-core systems, application can be launched in a cluster of Node.js processes to handle the load. The cluster module allows you to easily create child processes that all share server ports. Following example create the ...