HMaster
E705295
HMaster is the master server process in Apache HBase responsible for managing region servers, coordinating load balancing, and handling administrative operations for the HBase cluster.
All labels observed (1)
| Label | Occurrences |
|---|---|
| HMaster canonical | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T7985714 — resolving that mention is where its identity was fixed. The disambiguator weighed these candidate entities and picked the highlighted one (or “None”, minting a new entity). This is how homonymy is resolved: the same surface form can point to different entities.
NED1
Entity disambiguation (via context triple)
gpt-5-mini-2025-08-07
Target entity: HMaster Context triple: [Apache HBase, usesComponent, HMaster]
-
A.
Mesos master
Mesos master is the central coordination service in an Apache Mesos cluster that manages resource allocation and scheduling across slave/agent nodes.
-
B.
Apache HBase
Apache HBase is a distributed, scalable, NoSQL database designed for real-time read/write access to large datasets, typically running on top of the Hadoop ecosystem.
-
C.
Apache ZooKeeper
Apache ZooKeeper is a centralized service for maintaining configuration information, naming, and distributed synchronization in large-scale distributed systems.
-
D.
HDFS
HDFS (Hadoop Distributed File System) is a fault-tolerant, distributed file system designed to store and manage large volumes of data across clusters of commodity hardware.
-
E.
HSM
A Hardware Security Module (HSM) is a dedicated, tamper-resistant device used to securely generate, store, and manage cryptographic keys and perform sensitive cryptographic operations.
- F. None of above. chosen
- G. Unsure - the case is ambiguous/there is not enough information to decide.
NED2
Entity disambiguation (via description)
gpt-5-mini-2025-08-07
Target entity: HMaster Target entity description: HMaster is the master server process in Apache HBase responsible for managing region servers, coordinating load balancing, and handling administrative operations for the HBase cluster.
-
A.
Mesos master
Mesos master is the central coordination service in an Apache Mesos cluster that manages resource allocation and scheduling across slave/agent nodes.
-
B.
ApplicationMaster
ApplicationMaster is the per-application coordinator in Hadoop YARN responsible for managing an application's lifecycle, resource requests, and task execution.
-
C.
Apache HBase
Apache HBase is a distributed, scalable, NoSQL database designed for real-time read/write access to large datasets, typically running on top of the Hadoop ecosystem.
-
D.
Apache ZooKeeper
Apache ZooKeeper is a centralized service for maintaining configuration information, naming, and distributed synchronization in large-scale distributed systems.
-
E.
HDFS
HDFS (Hadoop Distributed File System) is a fault-tolerant, distributed file system designed to store and manage large volumes of data across clusters of commodity hardware.
- F. None of above. chosen
Statements (47)
| Predicate | Object |
|---|---|
| instanceOf |
Apache HBase component
ⓘ
master server process ⓘ |
| belongsToProject | Apache Hadoop ecosystem NERFINISHED ⓘ |
| canBe | highly available with multiple backup masters ⓘ |
| category |
NoSQL database infrastructure component
ⓘ
distributed system master node ⓘ |
| communicatesWith | HRegionServer NERFINISHED ⓘ |
| configurationFile | hbase-site.xml ⓘ |
| coordinates |
automatic region rebalancing
ⓘ
manual region movement ⓘ |
| developedFor | HBase cluster management ⓘ |
| electsActiveMasterUsing | ZooKeeper NERFINISHED ⓘ |
| exposes |
JMX metrics
ⓘ
administrative APIs ⓘ |
| hasRole | central coordination point for HBase cluster ⓘ |
| implementedIn | Java NERFINISHED ⓘ |
| introducedIn | Apache HBase NERFINISHED ⓘ |
| license | Apache License 2.0 ⓘ |
| monitors |
region distribution
ⓘ
region server load ⓘ |
| partOf | Apache HBase NERFINISHED ⓘ |
| responsibleFor |
assigning regions to region servers
ⓘ
balancing regions across region servers ⓘ coordinating cluster shutdown ⓘ coordinating cluster startup ⓘ coordinating load balancing ⓘ coordinating region merges ⓘ coordinating region splits ⓘ handling administrative operations ⓘ initiating recovery of failed region servers ⓘ maintaining assignment state of regions ⓘ maintaining cluster metadata ⓘ managing region servers ⓘ managing table creation ⓘ managing table deletion ⓘ managing table schema changes ⓘ monitoring region server health ⓘ reassigning regions on region server failure ⓘ tracking region server registrations in ZooKeeper ⓘ |
| runsOn | HBase master node ⓘ |
| startedBy | HBase master daemon script ⓘ |
| storesMetadataIn | hbase:meta table ⓘ |
| supportsOperation |
disable table
ⓘ
enable table ⓘ namespace management ⓘ snapshot management ⓘ |
| uses | Apache ZooKeeper NERFINISHED ⓘ |
How these facts were elicited
The pipeline generated the facts above by prompting gpt-5.1 with this entity's name + description and the instruction below.
Instruction
You are a knowledge base construction expert. Given a subject entity and a description of it, return factual statements that you know for the subject as a JSON list of dictionaries(triples), where keys must be "subject", "predicate" and "object". The number of facts may be very high, between 25 to 50 or more, for very popular subjects. For less popular subjects, the number of facts can be very low, like 5 or 10. # Requirements - If you don't know the subject at all, return an empty list. - If the subject is not a named entity, return an empty list. - Include at least one triple where predicate is "instanceOf". - Do not get too wordy. - Separate several objects into multiple triples with one object.
Input
Subject: HMaster Description of subject: HMaster is the master server process in Apache HBase responsible for managing region servers, coordinating load balancing, and handling administrative operations for the HBase cluster.
Referenced by (1)
Full triples — surface form annotated when it differs from this entity's canonical label.