cellular backups

The Internet of things wireless communication technology, mainly divided into two categories: ZigBee, WiFi, Bluetooth, Z-wave and other short-distance communication technology, the other is Lpwan (low-power wide-area Network, low-power WAN), that is, WAN communication technology. Lpwa can be divided into two categories: one is working in the unlicensed spectrum of Lora, Sigfox and other technologies, the other is working under the authorization spectrum, 3GPP support 2/3/4g

Tags: mysql Purpose of Backup: Disaster recovery: Error operation, hardware failure, software failure, natural disaster, hacker attack Note: 1, can tolerate the loss of how much data NBSP;NBSP;NBSP;2, time spent recovering data 3, time required for backup 4, business impact NBSP;NBSP;5, Backup server load backup type full backup: Back up data partial backups of the entire database: Back up the specified part of the data Incremental backup: Bac

Content of this Chapter Consistent and inconsistent RMAN backups Online backups and backup mode Backup Sets Image copies Multiple copies of RMAN backups Control File and server parameter file autobackups Incremental backups Backup retention policies 1. consistent and inconsistent backup of consistent and inco

. Paragraph levelIn large databases, a number of files or filegroups are often included. The use of piecemeal restore, you can make the database after the restoration of some files or filegroups, this part of the data can be accessed, so as to reduce the database offline time.Here's one thing to note:SQL Server does not allow users to back up or restore individual tables Restore Scheme under the simple recovery model under the full/bulk-logged Recovery model

is the basis for an incremental backup of the InnoDB table, that is, Innobackupex is implemented by backing up pages that have changed since the last full backup.To implement the first incremental backup, you can use the following command:# Innobackupex--incremental/backup--incremental-basedir=basedirWhere Basedir refers to the directory where the full backup is located, the Innobackupex command creates a new time-named directory in the/backup directory to hold all the incremental backup data a

Tags: innobackupex backup xtrabackup Backup principle backup classified physical backup scriptI. Why a backup is requiredIn a real-world production environment, it is a mistake to delete the operation, the hardware damage will result in the data is not available, this time we need to backup to achieve disaster recovery. Hardware-level redundancy is also required, such as RAID, and it is not a substitute for backup operations, since data is not deleted after it has been mistakenly erased, so back

One: There are several ways of database backup, there are several ways to restore the database 1: Restore of full backups 2: Restore of differential backups (you need to restore the most recent full backup, then restore the most recent differential backup, and if you have a transaction log backup after a differential backup, you should also restore the transaction log backup) 3: Restore of the transaction l

supported. What is recovery mode? Many people only focus on the backup, not the recovery model, in fact, all the backup should be from the recovery model as a point of entry. The recovery model is actually a database-level option that controls the behavior of the backup restore. SQL Server has only three recovery models in all current releases: The Simple Recovery Model (hereafter referred to as simple mode), the bulk-logged recovery model (hereafter referred to as the large capac

approach gives it the power of wireless access, while 7 mobile Bluetooth users can connect to the Internet through a network node. 3 Cellular IP and mobile IP There are two main technologies for using TCP/IP protocol for mobile users: Cellular IP Mobile and mobile IP. In this paper, we will discuss the working principle of Bluetooth technology separately. 3.1 The concept of

recovery model. To put it simply, it is necessary to minimize logging of bulk operations and save space for log files (such as importing data, batch updating, SELECT into, and so on). For example, when you insert hundreds of thousands of records in a database, in the full recovery model, the action of each inserted record is recorded in the log, making the log file very large, and in the bulk-logged recovery model, recording only the necessary actions and not logging all, which can greatly impr

recovery model, recording only the necessary actions and not logging all, which can greatly improve the performance of the database, However, because the log is incomplete, the data may not be recoverable once a problem occurs. Therefore, the recovery model is typically changed to the bulk-logged recovery model only when a large number of data operations are required, and the recovery model is changed back to the full recovery model immediately after the data has been processed. Simple recover

folder, then innobackupex the committed transaction, rolls back the uncommitted transaction, and then writes the data to the Backed-up data file (InnoDB file) and rebuilds the log file. This step implicitly calls 2 times xtrabackup–prepare. With more about Xtrabackup can look after the chapters. Other options: --user-memory: Specifies the memory to be used during the preliminary phase, which is faster in memory, and defaults to 10MB $ Innobackupex--apply-log--use-memory=4g/path/to/backup-dir

log backupsIn summary, if your database uses the full/bulk-logged recovery model, you must periodically perform transaction log backups, or the transaction log will continue to grow. 2.1.Backup types (back-up type)Complete: Backs up the entire database, which is the basis for other backups. A full backup backs up all data in the data file + partial transaction log records. Transaction logging is used to re

Tutorial on MSSQL Server database backup Restore method Full backup: Backs up all selected folders and does not rely on the archive properties of files to determine which files to back up. (During the backup process, any existing tags are cleared, each file is marked as backed up, in other words, the archive attribute is cleared.) A full backup is also called a full backup. Differential backup: A differential backup is for full backups: All files th

'. sql.gz# ' |bashBack up all databases in databases except Information_schemaperformance_schemaSecond, Xtrabackup full backup and restore 1 full backup on original host Xtrabackup --backup--target-dir=/backups/Backup source host to/backups scp-r/backups/192.168.134.192:/2 on the target hostSystemctl Stop mariadb //Stop Recovery host MARIADB service

Google released the 2nd season of Android performance optimization course, a total of 20 short videos, including roughly: Battery optimization, network optimization, how to optimize on wear, using object pooling to improve efficiency, LRU cache,bitmap scaling, caching, reuse, PNG compression, Customize view performance, improve the rendering performance of view after setting alpha, and use tips for tools such as Lint,stictmode and more. Here is a summary of these courses, cognitive limited, unde

-APP purchase function. This feature allows you to sell content or services in your application. This function is implemented using the store KIT framework. It can provide basic support for the handling of financial transactions using iTunes accounts. applications only need to process user experience and display of content or services for sale. For more information about how IOS supports in-APP purchase, seeProgramming Guide for In-APP purchase. For more information about the store KIT framewo

Grand Central Dispatch (GCD) reference. In App Purchase) IOS 3.0 introduces the in-APP purchase function. This feature allows you to sell content or services in your application. This function is implemented using the Store Kit framework. It can provide basic support for the handling of financial transactions using iTunes accounts. applications only need to process user experience and display of content or services for sale. For more information about how iOS supports in-APP purchase, see the i

Location service has become a popular technology and will become a standard for all mobile devices (such as smartphones and handheld computers) in the future. With the rapid growth of users' demand for Location-Based services, wireless Location technology is becoming more and more important. The positioning of GSM cellular base stations is characterized by the advantages of fast positioning speed, low cost (no additional hardware needs to be added to

forward reasonable suggestions for studying the deep coverage strategy of large school parks, we strive to solve the bottleneck of difficult campus coverage and meet campus network requirements based on reasonable planning to ensure network quality. Analysis of wireless signal coverage strategies in dormitory areas of Colleges and Universities The dormitory area of colleges and universities has the following features: users are intensive, communication time is relatively concentrated, and time