What is the difference between Elasticsearch 9300 9200

To put it simply: Port 9300: Used for communication between ES nodes.

Port 9200: Used by ES nodes and external communications.

Eclipse test.

You need to right-click and select Run Configurations in the Spine of Sakura's Main method, and enter vm arguments in the Arguments tab. For example:

Installation directory.

To put it simply, 9300gs should be about 30% stronger than the latter, and the latter is basically the integrated graphics card, which has a detailed comparison of these 2 graphics cards.

HD3470 positioning mid-range 9300gs is low-end cargo width only 64bit....The garbage is dead and the laptop graphics card of the previous interrupt time nv has a quality problem, and it has been recalled

hd2600>hd3470=2400xt>=9300gs>9200gs

The order should be about the same.

9300gs and 9200gs are garbage, HD2600 and 2400XT Although they are ATI graphics cards of the previous generation, 2600 is still much better than 9300gs

The conditions in the must must must be true in order to return, and the hould is the one of the conditions in the included condition that is returned if the condition is true.

must have three meanings.

Should should, unexpectedly, as the norm should.

The number of documents we store using Elasticsearch is close to 5 billion (close to 1 copy).

10 billion documents), a total of 10 data nodes and 2 metadata nodes (48GB memory, 8 core CPU, ES uses 70% of the memory), and the daily document increment is about 3000W (speed.

Increasing). At present, the query efficiency of a single document is basically in a real-time state; Aggregate statistics for 1 to 2 weeks of data can also return results in less than 10 seconds.

However, there is still room for improvement:

1.For the application scenario of querying a single piece of data, we can use the routing mechanism of ES to store all documents with the same characteristics (such as the same userid) in the same index on a node, so that our subsequent queries can directly locate this node instead of broadcasting all nodes on the query channel.

2.With the increase of data nodes, the number of shards should be appropriately increased to improve the distribution level of the system, and the query performance can also be optimized by dividing and conquering.

Personally, I think that Elasticsearch is still good as an internal storage, and the efficiency can be basically satisfied, and it is okay to replace the traditional DB in some aspects, provided that your business is not the right thing.

There are special requirements for sexual service; And the permission management does not need to be so detailed, because the permission of ES is not perfect. Since our application scenario for ES is only to aggregate data in a certain period of time, there are no large number of single documents.

file request (e.g. finding a user's document through userid, similar to the application scenario of NoSQL), so whether it can replace NoSQL still needs to be tested by yourself. If I had to choose, I.

Will try to use ES as an alternative to traditional NoSQL because its scale-out mechanism is too convenient.

It is not recommended to replace the database

The ES team did not recommend adopting ES as the primary storage entirely, and the lack of access control also had some issues with data loss and contamination.

It is recommended to use a dedicated DB storage solution and then use ES for serving.

The configuration is as follows:

Example:"billsearch"

node7" true

false"","","","","","","",""]: soft

1: true

Example 2:"billsearch"

node8"

falsefalse

"","","","","","","",""]: soft

1: true

Among them, I also commented out these two options and tried, but they still don't work. With RHEL7, Firewalld and Selinux have been turned off

Configure it with a computer.

Basic configuration: 1: There are two configuration files in the config folder of elasticsearch: and, the first is the basic configuration file of ES, and the second is the log configuration file.

2: ES also uses log4j to record the diary, so the settings in the file can be set according to the normal log4j configuration file. Let's talk about what can be configured in this file.

3: Diversified computer configurations.

4: Go to the mobile phone store to configure it directly.

You don't need to explain what kind of data analysis you need to do, how to choose the method.