centos zookeeper data backup and recovery
Apr 14, 2025 pm 03:48 PMGuide to backup and restore of ZooKeeper data under CentOS system
This article explains how to safely and reliably backup and restore ZooKeeper data in CentOS system, mainly relying on ZooKeeper's own data backup mechanism and tools.
ZooKeeper data backup mechanism
ZooKeeper uses the following mechanisms to ensure data security:
- Snapshot: ZooKeeper periodically copies the data state in memory to the snapshot file on disk. This is a full backup of the data.
- Transaction Log: Records all transaction operations for data recovery and state reconstruction.
Backup Tool
Common backup tools include:
- zkCli.sh: ZooKeeper's command line client, which can be used for data backup and migration.
- Java client API: Provides programming interface to achieve more flexible data backup and migration operations.
Backup and Recovery Process
- Configure snapshots and transaction logs: Make sure ZooKeeper has correctly configured snapshots and transaction log features.
- Regular backup: Perform data backup periodically using
zkCli.sh
or Java API. - Recovery process testing: Regular data recovery tests are conducted to verify the effectiveness and integrity of the recovery process.
- Monitoring and alarm: Establish a monitoring mechanism to detect abnormalities in a timely manner and trigger alarms.
Code Example
Back up data using zkCli.sh
:
# Connect to ZooKeeper cluster zkCli.sh -server host1:port1 # Save snapshot data to the specified path save /path/to/snapshot
Back up data using Java API:
import org.apache.zookeeper.*; import org.apache.zookeeper.data.Stat; import java.io.*; public class ZookeeperDataBackup { private static final String QUORUM_SERVERS = "host1:port1"; private static final int SESSION_TIMEOUT = 3000; public static void main(String[] args) throws Exception { ZooKeeper zk = new ZooKeeper(QUORUM_SERVERS, SESSION_TIMEOUT, event -> {}); File snapshotFile = new File("/path/to/snapshot"); try (OutputStream outputStream = new FileOutputStream(snapshotFile)) { byte[] data = zk.getData("/", false, new Stat()); outputStream.write(data); } zk.close(); } }
Use Java API to recover data (example, need to be adjusted according to actual conditions):
import org.apache.zookeeper.*; import java.io.*; public class ZookeeperDataRecovery { // ... (The code is similar to the backup example, and needs to be supplemented with recovery logic, such as creating nodes, etc.) ... }
(Note: The Java code examples for recovering data are relatively complex and need to be adjusted according to the actual ZooKeeper data structure and target environment. This example is for reference only and does not guarantee its integrity and correctness.)
Through the above steps and code examples, you can effectively back up and restore ZooKeeper data on CentOS system, thereby ensuring data security and system stability. Please adjust the code and configuration parameters according to the actual situation. It is recommended to fully test the recovery process in the test environment.
The above is the detailed content of centos zookeeper data backup and recovery. For more information, please follow other related articles on the PHP Chinese website!

Hot AI Tools

Undress AI Tool
Undress images for free

Undresser.AI Undress
AI-powered app for creating realistic nude photos

AI Clothes Remover
Online AI tool for removing clothes from photos.

Clothoff.io
AI clothes remover

Video Face Swap
Swap faces in any video effortlessly with our completely free AI face swap tool!

Hot Article

Hot Tools

Notepad++7.3.1
Easy-to-use and free code editor

SublimeText3 Chinese version
Chinese version, very easy to use

Zend Studio 13.0.1
Powerful PHP integrated development environment

Dreamweaver CS6
Visual web development tools

SublimeText3 Mac version
God-level code editing software (SublimeText3)

Hot Topics

In the digital currency market, real-time mastering of Bitcoin prices and transaction in-depth information is a must-have skill for every investor. Viewing accurate K-line charts and depth charts can help judge the power of buying and selling, capture market changes, and improve the scientific nature of investment decisions.

Ethereum is a decentralized application platform based on smart contracts, and its native token ETH can be obtained in a variety of ways. 1. Register an account through centralized platforms such as Binance and Ouyiok, complete KYC certification and purchase ETH with stablecoins; 2. Connect to digital storage through decentralized platforms, and directly exchange ETH with stablecoins or other tokens; 3. Participate in network pledge, and you can choose independent pledge (requires 32 ETH), liquid pledge services or one-click pledge on the centralized platform to obtain rewards; 4. Earn ETH by providing services to Web3 projects, completing tasks or obtaining airdrops. It is recommended that beginners start from mainstream centralized platforms, gradually transition to decentralized methods, and always attach importance to asset security and independent research, to

Identifying the trend of the main capital can significantly improve the quality of investment decisions. Its core value lies in trend prediction, support/pressure position verification and sector rotation precursor; 1. Track the net inflow direction, trading ratio imbalance and market price order cluster through large-scale transaction data; 2. Use the on-chain giant whale address to analyze position changes, exchange inflows and position costs; 3. Capture derivative market signals such as futures open contracts, long-short position ratios and liquidated risk zones; in actual combat, trends are confirmed according to the four-step method: technical resonance, exchange flow, derivative indicators and market sentiment extreme value; the main force often adopts a three-step harvesting strategy: sweeping and manufacturing FOMO, KOL collaboratively shouting orders, and short-selling backhand shorting; novices should take risk aversion actions: when the main force's net outflow exceeds $15 million, reduce positions by 50%, and large-scale selling orders

1. Download and install the application through the official recommended channel to ensure safety; 2. Access the designated download address to complete the file acquisition; 3. Ignore the device safety reminder and complete the installation as prompts; 4. You can refer to the data of mainstream platforms such as Huobi HTX and Ouyi OK for market comparison; the APP provides real-time market tracking, professional charting tools, price warning and market information aggregation functions; when analyzing trends, long-term trend judgment, technical indicator application, trading volume changes and fundamental information; when choosing software, you should pay attention to data authority, interface friendliness and comprehensive functions to improve analysis efficiency and decision-making accuracy.

First, select well-known platforms such as Binance Binance or Ouyi OKX, and prepare your email and mobile phone number; 1. Visit the official website of the platform and click to register, enter your email or mobile phone number and set a high-strength password; 2. Submit information after agreeing to the terms of service, and complete account activation through the email or mobile phone verification code; 3. After logging in, complete identity authentication (KYC), enable secondary verification (2FA), and regularly check security settings to ensure account security. After completing the above steps, you can successfully create a BTC digital currency account.

1. First, ensure that the device network is stable and has sufficient storage space; 2. Download it through the official download address [adid]fbd7939d674997cdb4692d34de8633c4[/adid]; 3. Complete the installation according to the device prompts, and the official channel is safe and reliable; 4. After the installation is completed, you can experience professional trading services comparable to HTX and Ouyi platforms; the new version 5.0.5 feature highlights include: 1. Optimize the user interface, and the operation is more intuitive and convenient; 2. Improve transaction performance and reduce delays and slippages; 3. Enhance security protection and adopt advanced encryption technology; 4. Add a variety of new technical analysis chart tools; pay attention to: 1. Properly keep the account password to avoid logging in on public devices; 2.

During the process of investing in the currency circle, paying attention to the market popularity and activity of the currency will help capture potential coins and popular trends. The popularity list reflects the transaction volume, social discussion and market attention of the currency, and is an effective tool for novices to quickly understand market trends.

Binance provides bank transfers, credit cards, P2P and other methods to purchase USDT, USDC and other stablecoins, with fiat currency entrance and high security; 2. Ouyi OKX supports credit cards, bank cards and third-party payment to purchase stablecoins, and provides OTC and P2P transaction services; 3. Sesame Open Gate.io can purchase stablecoins through fiat currency channels and P2P transactions, supporting multiple fiat currency recharges and convenient operation; 4. Huobi provides fiat currency trading area and P2P market to purchase stablecoins, with strict risk control and high-quality customer service; 5. KuCoin supports credit cards and bank transfers to purchase stablecoins, with diverse P2P transactions and friendly interfaces; 6. Kraken supports ACH, SEPA and other bank transfer methods to purchase stablecoins, with high security
