Lucien
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Articles
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How to trigger re-replication for unreplicated records within a strongly consistent Aerospike namespace?
ContextWhen an Aerospike namespace is running in Strong Consistency mode, it ensures that all writes are acknowledged as successful to the client are replicated between all copies of a record. Some...
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How to rewind XDR for a namespace?
ContextStarting with version 5.0 of the Aerospike EE server, the Cross Datacenter Replication (XDR) subsystem supports the ability to rewind and re-ship records to an XDR destination when dynamical...
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Why do I get unexpected evictions on a node with no HWM breaches?
DetailIn some cases a node may evict records even though it has not crossed the configured high-water-mark (HWM) for eviction.AnswerStarting in Aerospike 4.5.1, eviction behavior was enhanced so th...
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How do I identify Shared memory segments?
ContextAerospike uses System V shared memory segments for several internal data structures, depending on namespace and storage configuration. In some cases, it is useful to identify which shared me...
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How to disable Automatic NUMA Balancing on RHEL 9?
ContextOverview: Automatic NUMA Balancing is a kernel feature that periodically moves tasks closer to the memory they are accessing and migrates memory pages to nodes local to the tasks. While bene...
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How to replace expiring CA certs in Aerospike Server?
ContextCA certificates usually have a far-off expiration date (10 to 20 years) compared to signed server or clients certificates expiration. This article will focus on the CA certificate expiration...
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Why is my client_write_error metrics incrementing?
Problem DescriptionOne of the metrics that may be useful to monitor (depending on the use case) is the one tracking errors received during client writes (client_write_error). There are different re...
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How to get the XDR retry queue state?
ContextThe following info call run against an XDR source cluster will capture the state of the retry queue: asinfo -l -v 'xdr-dc-state:dc=<DCNAME>;namespace=<NAMESPACE>'MethodThe output will displa...
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How to get LUT (last update time) of a record ?
ContextThe LUT (last update time) of a record is part of a record's meta data but is currently not returned to the clients through any direct API. The feature to add such capability is internally t...
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Can a basic SI or PI query job change the state of an unreplicated record?
DetailIn Strong Consistency mode, it is possible for records to be in the Unreplicated state.a Re-replication can be triggered when the record is accessed by a client. Would a basic SI or PI query ...