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AssessmentTelecommunications

Index design decides search speed and retention cost before anyone writes a query

Telecommunications Operator

Assessment of an index and sourcetype design that had grown organically, driving poor search performance and unmanageable retention rules.

Overview

A telecom operator had accumulated hundreds of indexes and far more sourcetypes, many of them near-duplicates. Searches were slow, retention was inconsistent, and access control was impossible to reason about. AceMQ assessed the architecture and produced a consolidation design.

Challenge

Every new data source had been given its own index by default, so retention, access control, and storage tiering had to be configured hundreds of times over, and often were not. Sourcetypes had been auto-assigned, producing many variants of the same log format with different field extractions, so a search across a logical data type required listing every variant by hand. Analysts frequently missed data because they did not know a variant existed.

Environment

On-premises Splunk indexer cluster with hundreds of indexes across network, security, and application data.

Approach

The assessment groups indexes and sourcetypes by their real access-control and retention requirements rather than by their source system, which is what should drive index boundaries in the first place. We measure search patterns to confirm the grouping matches how people actually query, then design a consolidated layout with a migration path that does not break existing saved searches.

Solution

  1. Full index and sourcetype inventory with volume, retention setting, and access-control configuration per entry
  2. Sourcetype variants clustered by actual log format to identify the duplicates that should collapse into one
  3. Search patterns analyzed to confirm proposed index boundaries match how analysts genuinely query the data
  4. Consolidated index design driven by retention and access-control requirements, not by source system identity
  5. Field extraction standardized per consolidated sourcetype so a single search covers what previously needed many
  6. Migration plan preserving existing saved searches through macros and aliases so no dashboard breaks at cutover

Outcome

Index count fell to a manageable set with retention and access control defined once per tier rather than per source. Searches that previously required enumerating sourcetype variants now run against a single consolidated type, and analysts stopped missing data they did not know existed.

Technologies

SplunkLinuxSyslog
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  • Remediation

    Greenplum Degraded Cluster and Mirror Recovery

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