Meta tags are being developed for Metrictank, a scalable Graphite solution, to efficiently manage large volumes of metrics without the overhead of storing redundant tags individually. Sponsored by Bloomberg, this feature allows users to add additional metadata, such as data center or operating system, to metrics for better filtering and grouping in Grafana/Metrictank while minimizing resource usage. Meta tags are treated as extrinsic attributes, similar to Prometheus's series joining, but offer a more seamless and transparent user experience. The implementation involves linking meta tags to "metarecords" and incorporates an enrichment step to make the tags appear as regular ones when querying data. Users can manage these tags via an API, and the system will operate on a relaxed, eventually-consistent model, gradually updating tag associations across the cluster. This development aims to provide a cost-effective and seamless way to handle extensive metric tagging needs, enhancing Metrictank's capability to support large-scale users efficiently.