1601396400
Bulk Updates with Optimistic Concurrency Control
In this blog we are going to focus on a scenario where you want to do many updates to vertices in a graph stored in Azure Cosmos DB using the Gremlin API, where each update needs to account for other updates that might occur at the same time.
A great feature about the Core (SQL) API in Azure Cosmos DB is that it is fully interoperable with the Gremlin API with respect to CRUD operations, which means you can use all of the powerful features in Core (SQL) API and it’s SDKs to manipulate vertices and edges in a graph.
A feature that has been added to the .NET SDK in Azure Cosmos DB since version 3 is bulk support, which we will also explore here. The bulk support feature in the SDK is a replacement for the older bulk executor library, and now fully supports all CRUD operations (insert, update, read, delete).
The full code sample for the below can be found here.
Bulk Scenario
Imagine you have a graph which models devices across a fleet of cars. Suppose you want to run a bulk operation to increase a temperature setting on each device by a certain amount for all devices in a particular fleet, but you are aware that independent operations could also be setting the temperature setting at the same time, and you want to make sure that this temperature state is not overwritten in your bulk update. In other words, you want to ensure all devices have their temperature setting increased by the same amount, relative to the value that was present in the database at the time of bulk update, without missing any interim updates. First, lets model the vertices in the graph as classes:
public class VertexDevice
{
[JsonProperty("id")]
internal string Id { get; set; }
[JsonProperty("pk")]
internal string pk { get; set; }
[JsonProperty("label")]
internal string label { get; set; }
[JsonProperty("model")]
public List<VertexProperty> model { get; set; }
[JsonProperty("temp")]
public List<VertexPropertyNumber> temp { get; set; }
[JsonProperty("status")]
public List<VertexProperty> status { get; set; }
[JsonProperty("_rid")]
internal string _rid { get; set; }
[JsonProperty("_self")]
internal string _self { get; set; }
[JsonProperty("_etag")]
internal string _etag { get; set; }
[JsonProperty("_attachments")]
internal string _attachments { get; set; }
[JsonProperty("_ts")]
internal string _ts { get; set; }
}
public class VertexProperty
{
[JsonProperty("id")]
public string Id { get; set; }
[JsonProperty("_value")]
public string _value { get; set; }
}
public class VertexPropertyNumber
{
[JsonProperty("id")]
public string Id { get; set; }
[JsonProperty("_value")]
public int _value { get; set; }
}
#core (sql) api #gremlin api #tips and tricks #.net sdk #bulk delete #bulk insert #bulk reads #bulk support #bulk updates #etag #gremlin #optimistic concurrency #sql api
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1601396400
Bulk Updates with Optimistic Concurrency Control
In this blog we are going to focus on a scenario where you want to do many updates to vertices in a graph stored in Azure Cosmos DB using the Gremlin API, where each update needs to account for other updates that might occur at the same time.
A great feature about the Core (SQL) API in Azure Cosmos DB is that it is fully interoperable with the Gremlin API with respect to CRUD operations, which means you can use all of the powerful features in Core (SQL) API and it’s SDKs to manipulate vertices and edges in a graph.
A feature that has been added to the .NET SDK in Azure Cosmos DB since version 3 is bulk support, which we will also explore here. The bulk support feature in the SDK is a replacement for the older bulk executor library, and now fully supports all CRUD operations (insert, update, read, delete).
The full code sample for the below can be found here.
Bulk Scenario
Imagine you have a graph which models devices across a fleet of cars. Suppose you want to run a bulk operation to increase a temperature setting on each device by a certain amount for all devices in a particular fleet, but you are aware that independent operations could also be setting the temperature setting at the same time, and you want to make sure that this temperature state is not overwritten in your bulk update. In other words, you want to ensure all devices have their temperature setting increased by the same amount, relative to the value that was present in the database at the time of bulk update, without missing any interim updates. First, lets model the vertices in the graph as classes:
public class VertexDevice
{
[JsonProperty("id")]
internal string Id { get; set; }
[JsonProperty("pk")]
internal string pk { get; set; }
[JsonProperty("label")]
internal string label { get; set; }
[JsonProperty("model")]
public List<VertexProperty> model { get; set; }
[JsonProperty("temp")]
public List<VertexPropertyNumber> temp { get; set; }
[JsonProperty("status")]
public List<VertexProperty> status { get; set; }
[JsonProperty("_rid")]
internal string _rid { get; set; }
[JsonProperty("_self")]
internal string _self { get; set; }
[JsonProperty("_etag")]
internal string _etag { get; set; }
[JsonProperty("_attachments")]
internal string _attachments { get; set; }
[JsonProperty("_ts")]
internal string _ts { get; set; }
}
public class VertexProperty
{
[JsonProperty("id")]
public string Id { get; set; }
[JsonProperty("_value")]
public string _value { get; set; }
}
public class VertexPropertyNumber
{
[JsonProperty("id")]
public string Id { get; set; }
[JsonProperty("_value")]
public int _value { get; set; }
}
#core (sql) api #gremlin api #tips and tricks #.net sdk #bulk delete #bulk insert #bulk reads #bulk support #bulk updates #etag #gremlin #optimistic concurrency #sql api
1599275499
PHP Code for Update Data in MySQL Database - Tuts Make
php code for updating data in mysql database. Here, i will show you how to fetch and update data from mysql in php.
PHP Code for retrieve and update data form mysql database
- Step 1 - Connect to MySQL database
- Step 2 - Fetch data from the database
- Step 3 - Update data from database
https://www.tutsmake.com/php-code-for-update-data-in-mysql-database/
#how to edit data in php using form #how to update data in php using form mysqli #how to fetch and update data from database in php #php code for updating data in mysql database #php #update
1598438700
10 Open Source/Commercial Control Panels For Virtual Machines (VM's) Management
Automatic creation and management of virtual machines is a topical issue for any company that provides VPS services. If you manage a large number of machines, a command line is definitely not the only tool you may need to perform various operations including client tasks, because such operations may be time-consuming.
In order to simplify routine tasks of server administrators and users, various companies develop control panels for virtual machines management, including interface-based solutions.
Don’t Miss: 20 Open Source/Commercial Control Panels to Manage Linux Servers
A control panel empowers you to perform any operation with a mouse click, whereas it would take you a good deal of time to complete the same task in the console. With a control panel, you will save your time and effort. However, it’s not all that simple.
Nowadays, VMmanager is the most popular software product for small and medium-sized businesses. VMware, in its turn, is a leading solution for large organizations. Both software products are commercial and rather expensive.
They deliver a large number of functions, however, some companies, especially, startups may need them. Besides, many of them cannot afford such an expensive product. For example, startups and companies in times of crisis may experience financial difficulties. Moreover, one can find interesting, outstanding solutions integrated with billing systems including tools for VM management.
How not to get lost among a great number of offers? We decided to help our users and wrote the following article, in which they will find answers to this question.
In this article, we will describe control panels for virtual machines management, both commercial and open-source, and help you choose the right solution to meet your personal needs.
1. VMmanager
VMmanager is one of the most popular commercial server virtualizations platforms based on QEMU/KVM technology. The solution has a reach feature set, that can suit both IT infrastructure owners and VPS services providers’ needs.
Virtual servers can be created within 2 minutes. Many routine tasks are performed automatically: including migration, cloning, reinstalling the OS, backups, adding and deleting interfaces, virtual server image creation, monitoring, statistics collection, server provisioning, etc.
The main advantages of VMmanager are:
- Centralized management of various clusters.
- Fault tolerance due to a microservice architecture.
- Overselling, which helps to improve VPS provider’s equipment efficiency.
- Complete control of the infrastructure thanks to a robust system of metrics collection.
- A modern and intuitive interface.
VMmanager – Virtualization Management Platform
2. VMware vSphere
VMware vSphere is the world’s leading server virtualization platform for building cloud infrastructure. With tons of its different powerful features, vSphere is a truely state-of-the-art software virtual machines management software. It is an ideal solution for large VPS providers with appropriate budgets and professional staff.
#control panels #virtualization #hosting control panel #linux control panels #virtual mahine control panels #linux
1624006380
Understanding Control Structures in Java
As we know, a program consists of lists of instructions. Control structures are programming block that can change the path we take through those instructions or not. It is a syntactic form in a programming language to express flow of control.
In java and also in every other programming language there are three basic control structures:
- Sequence Structure
- Repetition Structure
- Selection Structure
#programming #java #control #software-development #understanding control structures in java #control structures in java
1612771906
How To Manually Reset Window Update Components To Fix Window Update Error?
If in case, the user is facing Window Update Error then they should manually reset Window Update Components. Generally, this error occurs because of the damage or corrupt Window update components or may be due to outdated Windows. But for more information, you should contact to the Microsoft team via www.office.com/setup enter the download key for free.
Manually Reset Windows Update Components:
- First, you should open a command prompt.
In Windows8.1 and Windows 8: Go to the Start screen, then select Search, and then type cmd. Here, in the search results, you should press-and-hold or just right-click on Command Prompt. After this, you should select Run as Administrator.
In Windows 7 and earlier versions: You need to press the Windows logo key + R, then type cmd in the Run box, and tap on Enter. After this, right-click on cmd and then you have to select Run as Administrator.
- Now, you have to stop the BITS service, the Windows Update service, and also the Cryptographic service. For this, at a command prompt, you have to type the following commands and just press Enter key after each command.
net stop wuauserv
net stop appidsvc
net stop cryptsvc
- Then, you have to delete the qmgr.dat files. For this, at a command prompt, you should type the following command, and then tap on Enter key:
- Here, at a command prompt, you should type the following command, and tap on Enter key:
- After this, you should reregister the BITS files and also the Windows Update files. For this, at a command prompt, you should type the following commands and tap on Enter after each command.
regsvr32.exe atl.dll
regsvr32.exe urlmon.dll
regsvr32.exe mshtml.dll
regsvr32.exe shdocvw.dll
regsvr32.exe browseui.dll
regsvr32.exe jscript.dll
regsvr32.exe vbscript.dll
regsvr32.exe scrrun.dll
regsvr32.exe msxml.dll
regsvr32.exe msxml3.dll
regsvr32.exe msxml6.dll
regsvr32.exe actxprxy.dll
regsvr32.exe softpub.dll
regsvr32.exe wintrust.dll
regsvr32.exe dssenh.dll
regsvr32.exe rsaenh.dll
regsvr32.exe gpkcsp.dll
regsvr32.exe sccbase.dll
regsvr32.exe slbcsp.dll
regsvr32.exe cryptdlg.dll
regsvr32.exe oleaut32.dll
regsvr32.exe ole32.dll
regsvr32.exe shell32.dll
regsvr32.exe initpki.dll
regsvr32.exe wuapi.dll
regsvr32.exe wuaueng.dll
regsvr32.exe wuaueng1.dll
regsvr32.exe wucltui.dll
regsvr32.exe wups.dll
regsvr32.exe wups2.dll
regsvr32.exe wuweb.dll
regsvr32.exe qmgr.dll
regsvr32.exe qmgrprxy.dll
regsvr32.exe wucltux.dll
regsvr32.exe muweb.dll
regsvr32.exe wuwebv.dll
- At this point, you should check the problem Windows update error is fixed or not. If in case, the error is still there then you should continue the next steps.
- Now, you should reset Winsock. For this, at a command prompt, just type the following command and hit Enter:
- If in case, you are running Windows XP, then you should configure the proxy settings. For this, at a command prompt, you need to type the following command, and hit Enter:
- But in case, you are running other versions of Windows, then at a command prompt, you should type the following command and tap on Enter: office.com/setup
- Here, you should Restart the BITS service, the Windows Update service, and also the Cryptographic service. For this, at a command prompt, just type the following commands and hit Enter after each command.
net start wuauserv
net start appidsvc
net start cryptsvc
- In Windows Vista only, you should clear the BITS queue. For this, at a command prompt, you should type the following command and tap Enter:
- At last, you should Restart the computer system.
read here also…
www.webroot.com/safe
www.avg.com/retail
#window update components #window update error #www.office.com/setup #office.com/setup #manually reset window update