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- Service Overview
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User Guide
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HBase User Guide
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HBase Cluster Management
- Overview
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- Self-Healing from HBase Hotspotting
- Global Secondary Indexes
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HBase Cluster Management
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ClickHouse User Guide
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ClickHouse Cluster Management
- Overview
- Managing ClickHouse Clusters
- Using ClickHouse
- Migrating ClickHouse Data
- ClickHouse User Management
- ClickHouse Role Management
- ClickHouse Slow Query Management
- Configuring Secure Channel Encryption for ClickHouse Clusters
- Application of ClickHouse Cold and Hot Data Separation
- ClickHouse Monitoring Clusters
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ClickHouse Cluster Management
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HBase User Guide
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Developer Guide
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FAQs
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General
- What Services Does a CloudTable Cluster Provide?
- Why Do I Choose CloudTable Service?
- How Do I Prepare for Creating a CloudTable HBase Cluster?
- What Should I Pay Attention to When Using CloudTable Service?
- What Compression Algorithms Are Supported by CloudTable HBase Clusters?
- Can I Stop CloudTable Service?
- Which Programming Languages Are Supported by HBase External APIs in CloudTable?
- How Do I Determine the Number of Faulty RegionServers?
- What Special Characters Does CloudTable HBase Support?
- What Can I Do If the Index Table Does Not Match the Data Table After CloudTable Data Is Deleted?
- What Should I Do If Concurrent Tasks Run Slowly When Python Accesses CloudTable Through Thrift?
- How do I view the TTL attribute of HBase shell?
- Why Are My Server Resources Released?
- How Do I Delete a Cluster?
- How Do I Stop Services and Release Resources?
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Connection and Access
- How Do I Access a CloudTable Cluster?
- Can I Use SSH to Access Computing Nodes of CloudTable?
- Why Can't I Access HBase After the ZK Address Is Configured?
- Why Is the Error "Will not attempt to authenticate using SASL (unknown error)" Reported When Connecting to HBase?
- How Do I View the IP Address Corresponding to a Domain Name in a CloudTable Link?
- How Do I Access CloudTable from Other Cloud Services?
- Can I Configure the hbase-site.xml File?
- How Do I Query the Creation Time of a Table in CloudTable HBase?
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Data Read/Write
- Is Raw Data Stored in CloudTable HBase?
- Why Can't I Write Data to HBase?
- What Is the Maximum Size of Data Written to the HBase Cluster?
- How Do I Check the Daily Incremental Data in HBase Tables?
- What Should I Do If an Error Is Reported When I Access the CloudTable HBase Cluster?
- How Do I Delete the Backup Table of the ZooKeeper Node in the ClickHouse Cluster?
- What Should I Do If a Database Missing Error Occurs When a Table Is Created in the ClickHouse Cluster?
- Billing FAQs
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General
- General Reference
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Introduction
Scenario
HBase secondary indexes can accelerate conditional queries with filters. There are local secondary indexes (LSIs, also called HIndexes) and global secondary indexes (GSIs). Compared with LSIs, GSIs have better query performance and are suitable for scenarios that require low read latency.
HBase GSIs use independent index tables to store index data. When a given query condition hits an index, a full table query is converted into an exact range query on an index table. This way, query speed is greatly improved. You do not need to modify your application code to enable HBase GSIs.
Key features of HBase GSIs are as follows:
- Composite index
Multiple columns of different column families can be specified as index columns.
- Covering index
Multiple columns or column families can be stored in the index table in redundancy to cover all data needed for a query. With covering indexes, you can quickly query non-index columns in index query.
- Index TTL
Index table TTL takes effect if data table TTL is enabled. To ensure consistency with the data table, the index table TTL is automatically inherited from the index column and the column to overwrite an index of the data table and cannot be specified.
- Online index change
Indexes can be created, deleted, and their status can be modified online without affecting data table read and write.
- Online index repair
If the index data hit by a query is invalid, index data rebuilding is triggered to ensure that the final query result is correct.
- Index tool
The index tool helps you to check consistency, repair, create, and delete indexes, modify index status, and rebuild index data.
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