Tag:Data Volume

  • How is tidb’s columnar storage engine implemented?

    Time:2021-10-16

    Author: Wei Wan TiDBIt is a distributed HTAP database. At present, it has two storage nodes: tikv and tiflash. Tikv adopts line storage, which is more suitable for TP type services; Tiflash adopts column storage and is good at AP type services. Tiflash synchronizes data from tikv nodes in real time through raft protocol, with […]

  • D3js incomplete use guide for data visualization

    Time:2021-10-16

    background This article is included inData visualization and graphicsspecial column The content related to texture is introduced above, and the 3D implementation is carried out using webgl,emm…..This article is not only a new direction, but also an idea to explore writing. (talk about the daily use of the framework according to the needs of small […]

  • Openmldb: expanding spark source code to achieve high-performance join

    Time:2021-10-12

    brief introduction Spark is the most popular distributed big data batch processing framework at present. Using spark, SQL operations of hundreds of G or even T-level data can be easily realized, such as single line feature calculation or join splicing of multiple tables. OpenMLDBIt is an open source database project for AI scenario optimization, and […]

  • Method for realizing paging in JS front end

    Time:2021-10-10

    Using JS to realize the front-end pagination page number management can visually distinguish the page number display (this is also the pagination page number display of most websites). It can have a good user experience. It is also written for business needs. It is still a novice and inexperienced. Welcome to point out and comment! […]

  • Orzclick: write a Clickhouse client for National Day

    Time:2021-9-17

    cause I think Clickhouse has a C + + client (Clickhouse CPP), and I used PHP CPP to write extensions, so I wrote it on the national dayOrzClick, a Clickhouse client for PHP. What’s more embarrassing is that I found seasclick in the middle of writing. It is also a binding of Clickhouse CPP, and […]

  • Fault analysis | MySQL optimization case – select count (*)

    Time:2021-9-9

    Author: xutySource: original contribution*It is produced by aikesheng open source community. The original content cannot be used without authorization. For reprint, please contact Xiaobian and indicate the source. Keywords in this article: count, SQL, secondary index 1、 Story background The project team contacted me and said that there is a table of about 500W for […]

  • Mask RCNN deployment tips

    Time:2021-9-2

    Int8 for network transmission Purpose: Our project needs to useinstance segmentation, sorcnn_maskThe output layer has a large amount of data, and because of the size of the picture1024*1024*3So big If you don’t compress it and transmit it directly, the amount of data will be very large and the interface delay will be very high In […]

  • How to migrate data from SQLite to PostgreSQL database

    Time:2021-8-30

    SQLite is an excellent embedded database, which is often used in mobile terminal, internal or temporary database, embedded device, Internet of things and other scenarios. It occupies very low resources and may only need a few hundred K of memory. It is a truly open-source unlimited database, cross platform, and supports Linux, MAC, Android, IOS, […]

  • Algorithm and data structure series (III) – select sort

    Time:2021-8-27

    Series articles: Algorithm and data structure series (I) – level differentiated understanding of algorithms Algorithm and data structure series (II) – Basic preparation before implementation Algorithm and data structure series (III) – select sort Algorithm and data structure series (IV) – insertion sorting method – insert sort Algorithm and data structure series (V) – improvement […]

  • Algorithm and data structure series (VII) – merge sort

    Time:2021-8-26

    Series articles: Algorithm and data structure series (I) – level differentiated understanding of algorithms Algorithm and data structure series (II) – Basic preparation before implementation Algorithm and data structure series (III) – select sort Algorithm and data structure series (IV) – insertion sorting method – insert sort Algorithm and data structure series (V) – improvement […]

  • Use of aggregation in Django

    Time:2021-8-19

    Series articles: Solve the compatibility problem between Django 2.2 and MySQL Django: transaction Use of aggregation in Django Use of F function in Django Django blogs use markdown to automatically generate directories Django’s filter, exclude and other methods make it convenient to query the database. This is good when the amount of data is small, […]

  • Comparison test report between dolphin dB and influxdb

    Time:2021-8-9

    Influxdb is an open source timing database implemented by go language. Its core is a customized storage engine TSM tree, which optimizes time series data and gives priority to the performance of inserting and querying data. Inluxdb uses the SQL like query language inluxql and provides out of the box time series mathematical and statistical […]