Class: OsCtl::Lib::Zfs::ZpoolTransactionGroups

Inherits:
Object
  • Object
show all
Defined in:
lib/libosctl/zfs/zpool_transaction_groups.rb

Overview

Read interface to /proc/spl/kstat/zfs/<pool>/txgs

Defined Under Namespace

Classes: TransactionGroup, TransactionGroupList

Constant Summary collapse

PROC_PATH = 
'/proc/spl/kstat/zfs'.freeze
STATES = 
{
  'B' => :birth,
  'O' => :open,
  'Q' => :quiesced,
  'W' => :wait_for_sync,
  'S' => :synced,
  'C' => :committed,
  '?' => :unknown
}.freeze

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(pools: []) ⇒ ZpoolTransactionGroups

Returns a new instance of ZpoolTransactionGroups.

Parameters:

  • pools (Array<String>) (defaults to: []) 


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# File 'lib/libosctl/zfs/zpool_transaction_groups.rb', line 142

def initialize(pools: [])
  read_pools = pools.empty? ? list_pools : pools
  paths = read_pools.to_h { |pool| [pool, txgs_path(pool)] }

  @pools = read_paths(paths)
end

Instance Attribute Details

#pools ⇒ Hash<String, TransactionGroupList> (readonly)

Returns:



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# File 'lib/libosctl/zfs/zpool_transaction_groups.rb', line 139

def pools
  @pools
end

Instance Method Details

#each {|pool, transaction| ... } ⇒ Object

Yield Parameters:



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# File 'lib/libosctl/zfs/zpool_transaction_groups.rb', line 151

def each(&)
  @pools.each(&)
end

#list_pools ⇒ Object (protected) 



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# File 'lib/libosctl/zfs/zpool_transaction_groups.rb', line 202

def list_pools
  ret = []

  Dir.entries(PROC_PATH).each do |f|
    next if %w[. ..].include?(f)
    next unless Dir.exist?(File.join(PROC_PATH, f))

    ret << f
  end

  ret
end

#read_file(pool, txgs_path, uptime) ⇒ Object (protected) 



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# File 'lib/libosctl/zfs/zpool_transaction_groups.rb', line 168

def read_file(pool, txgs_path, uptime)
  ret = TransactionGroupList.new

  File.open(txgs_path) do |f|
    item = f.each_line
    item.next # skip the header
    item.each do |line|
      values = line.strip.split

      birth_ns = values[1].to_i
      birth_time = uptime.booted_at + (birth_ns / 1_000_000_000.to_f)

      ret << TransactionGroup.new(
        pool:,
        txg: values[0].to_i,
        birth_time:,
        birth_ns:,
        state: STATES[values[2]],
        ndirty: values[3].to_i,
        nread: values[4].to_i,
        nwritten: values[5].to_i,
        reads: values[6].to_i,
        writes: values[7].to_i,
        otime_ns: values[8].to_i,
        qtime_ns: values[9].to_i,
        wtime_ns: values[10].to_i,
        stime_ns: values[11].to_i
      )
    end
  end

  ret
end

#read_paths(txgs_paths) ⇒ Object (protected) 



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# File 'lib/libosctl/zfs/zpool_transaction_groups.rb', line 157

def read_paths(txgs_paths)
  ret = {}
  uptime = Uptime.new

  txgs_paths.each do |pool, txgs_path|
    ret[pool] = read_file(pool, txgs_path, uptime)
  end

  ret
end

#txgs_path(pool) ⇒ Object (protected) 



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# File 'lib/libosctl/zfs/zpool_transaction_groups.rb', line 215

def txgs_path(pool)
  File.join(PROC_PATH, pool, 'txgs')
end