https://gitlab.com/tezos/tezos
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Tip revision: 50ad02fa2a56f1d3541a6d8b3c8a6a93160d4f54 authored by Albin Coquereau on 05 April 2024, 09:32:54 UTC
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Tip revision: 50ad02f
constants.ml
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(* FIXME: https://gitlab.com/tezos/tezos/-/issues/4458

   Better handling of this limitation. *)
let shards_store_lru_size =
  (* The size of the LRU is determined by the number of slots we remember in the
     cache. Each entry in the cache maintains two open file descriptors (one via
     regular file opening and one via mmap on the bitset region). Note that setting
     a too high value causes a "Too many open files" error. *)
  let irmin_internals_entries_per_toplevel_entry = 3 in
  let number_of_slots = 256 in
  let number_of_remembered_levels = 1 in
  irmin_internals_entries_per_toplevel_entry * number_of_slots
  * number_of_remembered_levels

(* Fewer cache sizes should be enough in practice,
   but we cache 50 since each cache entry has quite a small memory footprint. *)
let committee_cache_size = 50

(* The size of the cache of 1024 entries (one per slot) is chosen such
   that: if a DAL node stores the shard proofs of 128 slots per level,
   the cache will be able to store the proofs for 8 levels, which
   should be quite sufficient with the current attestation lag.

   A shard proof takes 52 bytes with the current encoding (could be improved
   to 48), so the maximum memory footprint of the cache is dominated by (keys
   size is negligible):

   1024 (cache size) * 2048 (shards per slot) * 52 bytes = 109 mb *)
let shards_proofs_cache_size = 1024

let shards_verification_sampling_frequency = 100

let amplification_random_delay_min = 1.

let amplification_random_delay_max = 2.
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