Package jline.lang.nodeparam

Class CacheNodeParam

java.lang.Object
jline.lang.NodeParam
jline.lang.nodeparam.CacheNodeParam
All Implemented Interfaces:
Serializable
public class CacheNodeParam extends NodeParam
Parameter container for cache nodes in queueing networks.

This class encapsulates all the parameters needed to configure a cache node, including cache capacity, item costs, hit/miss class mappings, replacement strategies, and access probabilities. Cache nodes model caching systems where items can be stored temporarily to reduce access latencies.

Key cache characteristics managed by this class:

  • Item capacity constraints and access costs
  • Hit and miss class routing for cache hits/misses
  • Replacement strategies (LRU, FIFO, etc.) when cache is full
  • Read access probabilities for different items
  • Actual hit/miss probabilities for performance analysis

Since:
1.0
See Also:

  • Field Details

    • accost

      public Matrix[][] accost
      Access cost matrix for cache items by class [items x classes x servers]

    • hitclass

      public Matrix hitclass
      Job class routing matrix for cache hits [items x classes]

    • itemcap

      public Matrix itemcap
      Capacity matrix specifying maximum number of each item type [items x 1]

    • missclass

      public Matrix missclass
      Job class routing matrix for cache misses [items x classes]

    • itemsize

      public Matrix itemsize
      Per-item storage cost (size) [1 x items]; null when unset

    • costcap

      public Matrix costcap
      Per-list cap on the total storage cost of the resident items [1 x lists]; null when unset

    • costcapglobal

      public boolean costcapglobal
      True when costcap was declared as a single cache-wide cap

    • retrievalClasses

      public Matrix retrievalClasses
      Matrix containing the retrieval class for each item [items x classes]

    • retrievalClassIndices

      public Set<Integer> retrievalClassIndices
      Set of indices for retrieval classes

    • nitems

      public int nitems
      Total number of distinct item types in the cache

    • totalCacheCapacity

      public int totalCacheCapacity
      Total cache capacity

    • retrievalSystemCapacity

      public int retrievalSystemCapacity
      Maximum number of items that can be retrieved simultaneously, 0 if no retrieval system, nItems - cache capacity if a retrieval system exists

    • retrievalSystemQueueIndices

      public Map<Integer,List<Integer>> retrievalSystemQueueIndices
      Retrieval System queue indices for each job class [jobClass -> node indices]

    • pread

      public Map<Integer,List<Double>> pread
      Read access probabilities for each item by server [server -> list of probabilities by item]

    • classitem

      public Map<Integer,Integer> classitem
      Item read by each per-item class of a cache network (Cache.setItemReadClasses), 1-based, 0 where the class is not one. Stored rather than inferred from a one-hot pread, which a genuine single-item popularity also has.

    • replacestrat

      public ReplacementStrategy replacestrat
      Replacement strategy used when cache is full (LRU, FIFO, etc.)

    • qlru

      public double qlru
      q-LRU admission probability on a miss (1.0 = always admit). Only used for QLRU.

    • actualhitprob

      public Matrix actualhitprob
      Actual hit probabilities computed during analysis [items x classes]

    • actualmissprob

      public Matrix actualmissprob
      Actual miss probabilities computed during analysis [items x classes]

    • actualdelayedhitprob

      public Matrix actualdelayedhitprob
      Actual delayed-hit fractions computed during analysis (retrieval system) [1 x classes]

    • actualhitproblist

      public Matrix actualhitproblist
      Actual per-list (per-level) hit fractions computed during analysis [classes x lists]

    • actualresidt

      public Matrix actualresidt
      Actual expected latency computed during analysis [items x classes]

    • actuallistcost

      public Matrix actuallistcost
      Mean storage cost held by each list computed during analysis [1 x lists]

  • Constructor Details

    • CacheNodeParam

      public CacheNodeParam()

  • Method Details

    • isEmpty

      public boolean isEmpty()
      Checks if this cache parameter container is empty (no parameters are set).
      Overrides:
      isEmpty in class NodeParam
      Returns:
      true if all cache parameters are null or default values, false otherwise