Reduce number of result names reported to our metric store by trimming some prefixes

[Badb0yBadb0y]

Hello,

I'm collecting metrics about objectstore bucket usages, however I have too many buckets and it hits the limit of our metric collector instance.
However most of the buckets is coming from 2-3 users so somehow I'd like to aggregate the same bucketnames and send it as a summarized metric to our collector.
Is it possible somehow let's say my metric collector has maximum 50000 datapoint in results and I have 100k buckets, however only 1 user has 64k buckets so the buckets which starts with stg- should be aggregated as one and send a summarized result to our collector?

This is my current config

receivers:
  filelog/internal:
    # log file to be consumed, can use wildcard for multiple files with same format
    include: [/var/log/w-*.log]
    operators:
      - type: regex_parser
        # parsing log line to attributes (tags)
        regex: '^(?P<msg>.*beast.* - - )\[(?P<time>\d{4}-\d{2}-\d{2}T\d{2}:\d{2}:\d{2}\.\d{6}\+\d{4})\] \"(?P<request_method>(GET|POST|PUT|DELETE|HEAD)) (\/swift\/v1)?\/(?P<bucketname>[^\/]*)\/.* HTTP\/1.1\" (?P<httpresponsecode>\d{3}).*'
        timestamp:
          parse_from: attributes.time
          layout_type: gotime
          layout: 2006-01-02T15:04:05.999999+0700
      # tags extracted from log line
      - type: move
        from: attributes.request_method
        to: resource.request_method
      - type: move
        from: attributes.bucketname
        to: resource.bucketname
      - type: move
        from: attributes.httpresponsecode
        to: resource.httpresponsecode
      # mandatory tags required 
      - type: add
        field: resource["service.name"]
        value: "ceph"
      - type: add
        field: resource["host.name"]
        value: "${HOSTNAME}"

exporters:
  otlphttp:
    endpoint: 'https://otlp'
    tls:
      insecure: false
      insecure_skip_verify: true

processors:
  batch:
    send_batch_size: 1 # Minimum batch size to trigger the sending process.
    send_batch_max_size: 10 # The upper limit of the batch size, the larger batches than limit will be split into smaller units.
    timeout: 200ms # Time duration after which a batch will be sent regardless of size.
  transform/count_metric:
    metric_statements:
      - context: resource
        statements:
          # configure list of tags that will be copied from log to metric
          - keep_keys(attributes, ["service.name", "host.name", "request_method", "bucketname", "httpresponsecode"])

connectors:
  count:
    logs:
      # specify metric name
      ceph.rgw.log:

service:
  pipelines:
    logs:
      receivers: [filelog/internal]
      processors: [batch]
      exporters: [count]
    metrics/count:
      receivers: [count]
      processors: [batch, transform/count_metric]
      exporters: [otlphttp]
  extensions: []