OceanBase supports both equally vertical and horizontal parallelism, which increases throughput and cuts down latency.
(3) Alternate Compaction: When one particular ObServer is going to compact one partition, queries within the merged partition is going to be despatched to ObServers in other Zones storing replicas of the identical partition.
OceanBase adopts constant non-blocking checkpoint system. Their staff is at this time engaged on the development of fuzzy non-blocking checkpoint mechanism applied in LSM tree construction. They plan to release that in following Edition.
OceanBase adopts reliable non-blocking checkpoint system. Their workforce is now engaged on the development of fuzzy non-blocking checkpoint system carried out in LSM tree composition. They plan to launch that in upcoming Variation.
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(3) Alternate Compaction: When one particular ObServer is about to compact 1 partition, queries about the merged partition might be sent to ObServers in other Zones storing replicas of precisely the same partition.
For each database occasion, it sets one server node as Energetic root server to supply root company like checking the wellbeing of every one of the participant nodes. The foundation support is accountable for load harmony, facts consistency, error Restoration, etcetera. If this active root server shuts down, OceanBase mechanically encourages one standby root server to a brand new Energetic Oracle转PostgreSQL root server.
The modify buffer just isn't utilised, mainly because there are no random-access inserts in the secondary indexes.
When an operation on the main key takes advantage of ALGORITHM=INPLACE, Despite the fact that the info is still copied, it is more effective than making use of ALGORITHM=Duplicate since:
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OceanBase implements block cache for Micro Block to speed up significant scan query. In addition, it implements a row cache for rows in Oracle迁移PostgreSQL block cache to speed up smaller get question.
For every database instance, it sets a person server node as Lively root server to provide root services like checking the overall health of the many participant nodes. The basis support is liable for load harmony, info regularity, error recovery, etc. If Oracle迁移MySQL this Energetic root server shuts down, OceanBase automatically promotes a person standby root server to a new Energetic root server.
OceanBase adopts shared-practically nothing program architecture. It stores reproduction of each and every partition on a minimum of a few server nodes in several server clusters. Every server node has its possess SQL execution engine and storage engine. The storage motor only accesses the regional information on that node. The SQL engine accesses the worldwide schema and generates the distributed query plan. Query executors take a look at the storage motor of every node to distribute and Acquire details amid them to execute the question.
OceanBase also supports secondary index. It combines index keys and desk Major vital for secondary index.