def update_pplns_est():
"""
Generates redis cached value for share counts of all users based on PPLNS window
"""
logger.info("Recomputing PPLNS for users")
# grab configured N
mult = int(current_app.config['last_n'])
# grab configured hashes in a n1 share
hashes_per_share = current_app.config.get('hashes_per_share', 65536)
# generate average diff from last 500 blocks
diff = cache.get('difficulty_avg')
if diff is None:
logger.warn("Difficulty average is blank, can't calculate pplns estimate")
return
# Calculate the total shares to that are 'counted'
total_shares = ((float(diff) * (2 ** 32)) / hashes_per_share) * mult
# Loop through all shares, descending order, until we'd distributed the
# shares
user_shares, total_grabbed = get_sharemap(None, total_shares)
user_shares = {'pplns_' + k: v for k, v in user_shares.iteritems()}
cache.set('pplns_total_shares', total_grabbed, timeout=40 * 60)
cache.set('pplns_cache_time', datetime.datetime.utcnow(), timeout=40 * 60)
cache.set_many(user_shares, timeout=40 * 60)
cache.set('pplns_user_shares', user_shares, timeout=40 * 60)
def test_leaderboard_anon(self):
s = m.UserSettings(user="******",
anon=True)
db.session.add(s)
start = datetime.datetime.utcnow()
now = start - datetime.timedelta(minutes=2)
v = m.ShareSlice(time=now,
value=101,
user="******",
worker="",
algo="scrypt",
span=0,
share_type="acc")
db.session.add(v)
v = m.ShareSlice(time=now,
value=100,
user="******",
worker="",
algo="scrypt",
span=0,
share_type="acc")
db.session.add(v)
db.session.commit()
leaderboard()
users = cache.get("leaderboard")
self.assertEquals(users[0][0], "Anonymous")
self.assertEquals(users[0][1]['scrypt'], 110318.93333333333)
self.assertEquals(users[1][0], "DAbhwsnEq5TjtBP5j76TinhUqqLTktDAnD")
self.assertEquals(users[1][1]['scrypt'], 109226.66666666667)
def update_pplns_est():
"""
Generates redis cached value for share counts of all users based on PPLNS window
"""
logger.info("Recomputing PPLNS for users")
# grab configured N
mult = int(current_app.config['last_n'])
# grab configured hashes in a n1 share
hashes_per_share = current_app.config.get('hashes_per_share', 65536)
# generate average diff from last 500 blocks
diff = cache.get('difficulty_avg')
if diff is None:
logger.warn(
"Difficulty average is blank, can't calculate pplns estimate")
return
# Calculate the total shares to that are 'counted'
total_shares = ((float(diff) * (2**32)) / hashes_per_share) * mult
# Loop through all shares, descending order, until we'd distributed the
# shares
user_shares, total_grabbed = get_sharemap(None, total_shares)
user_shares = {'pplns_' + k: v for k, v in user_shares.iteritems()}
cache.set('pplns_total_shares', total_grabbed, timeout=40 * 60)
cache.set('pplns_cache_time', datetime.datetime.utcnow(), timeout=40 * 60)
cache.set_many(user_shares, timeout=40 * 60)
cache.set('pplns_user_shares', user_shares, timeout=40 * 60)
def update_pplns_est(self):
"""
Generates redis cached value for share counts of all users based on PPLNS window
"""
try:
logger.info("Recomputing PPLNS for users")
# grab configured N
mult = int(current_app.config['last_n'])
# generate average diff from last 500 blocks
diff = cache.get('difficulty_avg')
if diff is None:
logger.warn("Difficulty average is blank, can't calculate pplns estimate")
return
# Calculate the total shares to that are 'counted'
total_shares = (float(diff) * (2 ** 16)) * mult
# Loop through all shares, descending order, until we'd distributed the
# shares
user_shares, total_grabbed = get_sharemap(None, total_shares)
user_shares = {'pplns_' + k: v for k, v in user_shares.iteritems()}
cache.set('pplns_total_shares', total_grabbed, timeout=40 * 60)
cache.set('pplns_cache_time', datetime.datetime.utcnow(), timeout=40 * 60)
cache.set_many(user_shares, timeout=40 * 60)
cache.set('pplns_user_shares', user_shares, timeout=40 * 60)
except Exception as exc:
logger.error("Unhandled exception in estimating pplns", exc_info=True)
raise self.retry(exc=exc)
def set_data(gbt, curr=None):
prefix = ""
if curr:
prefix = curr + "_"
prev_height = cache.get(prefix + 'blockheight') or 0
if gbt['height'] == prev_height:
logger.debug(
"Not updating {} net info, height {} already recorded.".format(
curr or 'main', prev_height))
return
logger.info("Updating {} net info for height {}.".format(
curr or 'main', gbt['height']))
# set general information for this network
difficulty = bits_to_difficulty(gbt['bits'])
cache.set(prefix + 'blockheight', gbt['height'], timeout=1200)
cache.set(prefix + 'difficulty', difficulty, timeout=1200)
cache.set(prefix + 'reward', gbt['coinbasevalue'], timeout=1200)
# keep a configured number of blocks in the cache for getting average difficulty
cache.cache._client.lpush(prefix + 'block_cache', gbt['bits'])
cache.cache._client.ltrim(prefix + 'block_cache', 0,
current_app.config['difficulty_avg_period'])
diff_list = cache.cache._client.lrange(
prefix + 'block_cache', 0,
current_app.config['difficulty_avg_period'])
total_diffs = sum([bits_to_difficulty(diff) for diff in diff_list])
cache.set(prefix + 'difficulty_avg',
total_diffs / len(diff_list),
timeout=120 * 60)
# add the difficulty as a one minute share, unless we're staging
if not current_app.config.get('stage', False):
now = datetime.datetime.utcnow()
try:
m = OneMinuteType(typ=prefix + 'netdiff',
value=difficulty * 1000,
time=now)
db.session.add(m)
db.session.commit()
except sqlalchemy.exc.IntegrityError:
db.session.rollback()
slc = OneMinuteType.query.with_lockmode('update').filter_by(
time=now, typ=prefix + 'netdiff').one()
# just average the diff of two blocks that occured in the same second..
slc.value = ((difficulty * 1000) + slc.value) / 2
db.session.commit()
def update_network():
"""
Queries the RPC servers confirmed to update network stats information.
"""
for currency in currencies.itervalues():
if not currency.mineable:
continue
try:
gbt = currency.coinserv.getblocktemplate({})
except (urllib3.exceptions.HTTPError, CoinRPCException) as e:
current_app.logger.error("Unable to communicate with {} RPC server: {}"
.format(currency, e))
continue
key = "{}_data".format(currency.key)
block_cache_key = "{}_block_cache".format(currency.key)
current_data = cache.get(key)
if current_data and current_data['height'] == gbt['height']:
# Already have information for this block
current_app.logger.debug(
"Not updating {} net info, height {} already recorded."
.format(currency, current_data['height']))
else:
current_app.logger.info(
"Updating {} net info for height {}.".format(currency, gbt['height']))
# Six hours worth of blocks. how many we'll keep in the cache
keep_count = 21600 / currency.block_time
difficulty = bits_to_difficulty(gbt['bits'])
cache.cache._client.lpush(block_cache_key, difficulty)
cache.cache._client.ltrim(block_cache_key, 0, keep_count)
diff_list = cache.cache._client.lrange(block_cache_key, 0, -1)
difficulty_avg = sum(map(float, diff_list)) / len(diff_list)
cache.set(key,
dict(height=gbt['height'],
difficulty=difficulty,
reward=gbt['coinbasevalue'] * current_app.SATOSHI,
difficulty_avg=difficulty_avg,
difficulty_avg_stale=len(diff_list) < keep_count),
timeout=1200)
def update_network():
"""
Queries the RPC servers confirmed to update network stats information.
"""
for currency in currencies.itervalues():
if not currency.mineable:
continue
try:
gbt = currency.coinserv.getblocktemplate({})
except (urllib3.exceptions.HTTPError, CoinRPCException) as e:
current_app.logger.error("Unable to communicate with {} RPC server: {}"
.format(currency, e))
continue
key = "{}_data".format(currency.key)
block_cache_key = "{}_block_cache".format(currency.key)
current_data = cache.get(key)
if current_data and current_data['height'] == gbt['height']:
# Already have information for this block
current_app.logger.debug(
"Not updating {} net info, height {} already recorded."
.format(currency, current_data['height']))
else:
current_app.logger.info(
"Updating {} net info for height {}.".format(currency, gbt['height']))
# Six hours worth of blocks. how many we'll keep in the cache
keep_count = 21600 / currency.block_time
difficulty = bits_to_difficulty(gbt['bits'])
cache.cache._client.lpush(block_cache_key, difficulty)
cache.cache._client.ltrim(block_cache_key, 0, keep_count)
diff_list = cache.cache._client.lrange(block_cache_key, 0, -1)
difficulty_avg = sum(map(float, diff_list)) / len(diff_list)
cache.set(key,
dict(height=gbt['height'],
difficulty=difficulty,
reward=gbt['coinbasevalue'] * current_app.SATOSHI,
difficulty_avg=difficulty_avg,
difficulty_avg_stale=len(diff_list) < keep_count),
timeout=1200)
def test_leaderboard_anon(self):
s = m.UserSettings(user="******", anon=True)
db.session.add(s)
start = datetime.datetime.utcnow()
now = start - datetime.timedelta(minutes=2)
v = m.ShareSlice(time=now, value=101,
user="******", worker="",
algo="scrypt", span=0, share_type="acc")
db.session.add(v)
v = m.ShareSlice(time=now, value=100,
user="******", worker="",
algo="scrypt", span=0, share_type="acc")
db.session.add(v)
db.session.commit()
leaderboard()
users = cache.get("leaderboard")
self.assertEquals(users[0][0], "Anonymous")
self.assertEquals(users[0][1]['scrypt'], 110318.93333333333)
self.assertEquals(users[1][0], "DAbhwsnEq5TjtBP5j76TinhUqqLTktDAnD")
self.assertEquals(users[1][1]['scrypt'], 109226.66666666667)
def update_pplns_est(self):
"""
Generates redis cached value for share counts of all users based on PPLNS window
"""
try:
logger.info("Recomputing PPLNS for users")
# grab configured N
mult = int(current_app.config['last_n'])
# generate average diff from last 500 blocks
diff = cache.get('difficulty_avg')
if diff is None:
logger.warn("Difficulty average is blank, can't calculate pplns estimate")
return
# Calculate the total shares to that are 'counted'
total_shares = ((float(diff) * (2 ** 16)) * mult)
# Loop through all shares, descending order, until we'd distributed the
# shares
remain = total_shares
user_shares = {}
for shares, user in (db.engine.execution_options(stream_results=True).
execute(select([Share.shares, Share.user]).
order_by(Share.id.desc()))):
user_shares.setdefault('pplns_' + user, 0)
if remain > shares:
user_shares['pplns_' + user] += shares
remain -= shares
else:
user_shares['pplns_' + user] += remain
remain = 0
break
cache.set('pplns_total_shares', (total_shares - remain), timeout=40 * 60)
cache.set('pplns_cache_time', datetime.datetime.utcnow(), timeout=40 * 60)
cache.set_many(user_shares, timeout=40 * 60)
cache.set('pplns_user_shares', user_shares, timeout=40 * 60)
except Exception as exc:
logger.error("Unhandled exception in estimating pplns", exc_info=True)
raise self.retry(exc=exc)
def set_data(gbt, curr=None):
prefix = ""
if curr:
prefix = curr + "_"
prev_height = cache.get(prefix + 'blockheight') or 0
if gbt['height'] == prev_height:
logger.debug("Not updating {} net info, height {} already recorded."
.format(curr or 'main', prev_height))
return
logger.info("Updating {} net info for height {}.".format(curr or 'main', gbt['height']))
# set general information for this network
difficulty = bits_to_difficulty(gbt['bits'])
cache.set(prefix + 'blockheight', gbt['height'], timeout=1200)
cache.set(prefix + 'difficulty', difficulty, timeout=1200)
cache.set(prefix + 'reward', gbt['coinbasevalue'], timeout=1200)
# keep a configured number of blocks in the cache for getting average difficulty
cache.cache._client.lpush(prefix + 'block_cache', gbt['bits'])
cache.cache._client.ltrim(prefix + 'block_cache', 0, current_app.config['difficulty_avg_period'])
diff_list = cache.cache._client.lrange(prefix + 'block_cache', 0, current_app.config['difficulty_avg_period'])
total_diffs = sum([bits_to_difficulty(diff) for diff in diff_list])
cache.set(prefix + 'difficulty_avg', total_diffs / len(diff_list), timeout=120 * 60)
# add the difficulty as a one minute share, unless we're staging
if not current_app.config.get('stage', False):
now = datetime.datetime.utcnow()
try:
m = OneMinuteType(typ=prefix + 'netdiff', value=difficulty * 1000, time=now)
db.session.add(m)
db.session.commit()
except sqlalchemy.exc.IntegrityError:
db.session.rollback()
slc = OneMinuteType.query.with_lockmode('update').filter_by(
time=now, typ=prefix + 'netdiff').one()
# just average the diff of two blocks that occured in the same second..
slc.value = ((difficulty * 1000) + slc.value) / 2
db.session.commit()
def new_block(self, blockheight, bits=None, reward=None):
"""
Notification that a new block height has been reached in the network.
Sets some things into the cache for display on the website, adds graphing
for the network difficulty graph.
"""
# prevent lots of duplicate rerunning...
last_blockheight = cache.get('blockheight') or 0
if blockheight == last_blockheight:
logger.warn("Recieving duplicate new_block notif, ignoring...")
return
logger.info("Recieved notice of new block height {}".format(blockheight))
difficulty = bits_to_difficulty(bits)
cache.set('blockheight', blockheight, timeout=1200)
cache.set('difficulty', difficulty, timeout=1200)
cache.set('reward', reward, timeout=1200)
# keep the last 500 blocks in the cache for getting average difficulty
cache.cache._client.lpush('block_cache', bits)
cache.cache._client.ltrim('block_cache', 0, 500)
diff_list = cache.cache._client.lrange('block_cache', 0, 500)
total_diffs = sum([bits_to_difficulty(diff) for diff in diff_list])
cache.set('difficulty_avg', total_diffs / len(diff_list), timeout=120 * 60)
# add the difficulty as a one minute share
now = datetime.datetime.utcnow()
try:
m = OneMinuteType(typ='netdiff', value=difficulty * 1000, time=now)
db.session.add(m)
db.session.commit()
except sqlalchemy.exc.IntegrityError:
db.session.rollback()
slc = OneMinuteType.query.with_lockmode('update').filter_by(
time=now, typ='netdiff').one()
# just average the diff of two blocks that occured in the same second..
slc.value = ((difficulty * 1000) + slc.value) / 2
db.session.commit()
def cleanup(self, simulate=False):
"""
Finds all the shares that will no longer be used and removes them from
the database.
"""
import time
t = time.time()
try:
diff = cache.get('difficulty_avg')
diff = 1100.0
if diff is None:
current_app.logger.warn(
"Difficulty average is blank, can't safely cleanup")
return
# count all unprocessed blocks
unproc_blocks = len(Block.query.filter_by(processed=False).all())
# make sure we leave the right number of shares for them
unproc_n = unproc_blocks * current_app.config['last_n']
# plus our requested cleanup n for a safe margin
cleanup_n = current_app.config.get('cleanup_n', 4) + current_app.config['last_n']
# calculate how many n1 shares that is
total_shares = int(round(((float(diff) * (2 ** 16)) * (cleanup_n + unproc_n))))
stale_id = 0
counted_shares = 0
rows = 0
logger.info("Unprocessed blocks: {}; {} N kept"
.format(unproc_blocks, unproc_n))
logger.info("Safety margin N from config: {}".format(cleanup_n))
logger.info("Total shares being saved: {}".format(total_shares))
# iterate through shares in newest to oldest order to find the share
# id that is oldest needed id
for shares, id in (db.engine.execution_options(stream_results=True).
execute(select([Share.shares, Share.id]).
order_by(Share.id.desc()))):
rows += 1
counted_shares += shares
if counted_shares >= total_shares:
stale_id = id
break
if not stale_id:
logger.info("Stale ID is 0, deleting nothing.")
return
logger.info("Time to identify proper id {}".format(time.time() - t))
if simulate:
logger.info("Stale ID computed: {}".format(stale_id))
logger.info("Rows iterated to find stale id: {}".format(rows))
return
logger.info("Cleaning all shares older than id {}".format(stale_id))
# To prevent integrity errors, all blocks linking to a share that's
# going to be deleted needs to be updated to remove reference
Block.query.filter(Block.last_share_id <= stale_id).update({Block.last_share_id: None})
db.session.flush()
# delete all shares that are sufficiently old
Share.query.filter(Share.id < stale_id).delete(synchronize_session=False)
db.session.commit()
logger.info("Time to completion {}".format(time.time() - t))
except Exception as exc:
logger.error("Unhandled exception in cleanup", exc_info=True)
db.session.rollback()
raise self.retry(exc=exc)
def cleanup(simulate=False, chunk_size=None, sleep_interval=None):
"""
Finds all the shares that will no longer be used and removes them from
the database.
"""
t = time.time()
# allow overridable configuration defaults
chunk_size = chunk_size or current_app.config.get('cleanup_chunk_size', 10000)
sleep_interval = sleep_interval or current_app.config.get('cleanup_sleep_interval', 1.0)
diff = cache.get('difficulty_avg')
if diff is None:
logger.warn("Difficulty average is blank, can't safely cleanup")
return
# count all unprocessed blocks
unproc_blocks = len(Block.query.filter_by(processed=False, merged_type=None).all())
# make sure we leave the right number of shares for unprocessed block
# to be distributed
unproc_n = unproc_blocks * current_app.config['last_n']
# plus our requested cleanup n for a safe margin
cleanup_n = current_app.config.get('cleanup_n', 4) + current_app.config['last_n']
# calculate how many n1 shares that is
total_shares = int(round(((float(diff) * (2 ** 16)) * (cleanup_n + unproc_n))))
logger.info("Chunk size {:,}; Sleep time {}".format(chunk_size, sleep_interval))
logger.info("Unprocessed blocks: {}; {} Extra N kept".format(unproc_blocks, unproc_n))
logger.info("Safety margin N from config: {}".format(cleanup_n))
logger.info("Total shares being saved: {:,}".format(total_shares))
# upper and lower iteration bounds
start_id = Share.query.order_by(Share.id.desc()).first().id + 1
stop_id = Share.query.order_by(Share.id).first().id
logger.info("Diff between first share {:,} and last {:,}: {:,}"
.format(stop_id, start_id, start_id - stop_id))
rows = 0
counted_shares = 0
stale_id = 0
# iterate through shares in newest to oldest order to find the share
# id that is oldest required to be kept
while counted_shares < total_shares and start_id > stop_id:
res = (db.engine.execute(select([Share.shares, Share.id]).
order_by(Share.id.desc()).
where(Share.id >= start_id - chunk_size).
where(Share.id < start_id)))
chunk = res.fetchall()
for shares, id in chunk:
rows += 1
counted_shares += shares
if counted_shares >= total_shares:
stale_id = id
break
logger.info("Fetched rows {:,} to {:,}. Found {:,} shares so far. Avg share/row {:,.2f}"
.format(start_id - chunk_size, start_id, counted_shares, counted_shares / rows))
start_id -= chunk_size
if not stale_id:
logger.info("Stale ID is 0, deleting nothing.")
return
logger.info("Time to identify proper id {}"
.format(datetime.timedelta(seconds=time.time() - t)))
logger.info("Rows iterated to find stale id: {:,}".format(rows))
logger.info("Cleaning all shares older than id {:,}, up to {:,} rows. Saving {:,} rows."
.format(stale_id, stale_id - stop_id, stale_id - start_id))
if simulate:
logger.info("Simulate mode, exiting")
return
# To prevent integrity errors, all blocks linking to a share that's
# going to be deleted needs to be updated to remove reference
Block.query.filter(Block.last_share_id <= stale_id).update({Block.last_share_id: None})
db.session.commit()
total_sleep = 0
total = stale_id - stop_id
remain = total
# delete all shares that are sufficiently old
while remain > 0:
bottom = stale_id - chunk_size
res = (Share.query.filter(Share.id < stale_id).
filter(Share.id >= bottom).delete(synchronize_session=False))
db.session.commit()
remain -= chunk_size
logger.info("Deleted {:,} rows from {:,} to {:,}\t{:,.4f}\t{:,}"
.format(res, stale_id, bottom, remain * 100.0 / total, remain))
stale_id -= chunk_size
if res: # only sleep if we actually deleted something
sleep(sleep_interval)
total_sleep += sleep_interval
logger.info("Time to completion {}".format(datetime.timedelta(time.time() - t)))
logger.info("Time spent sleeping {}".format(datetime.timedelta(seconds=total_sleep)))
def cleanup(simulate=False, chunk_size=None, sleep_interval=None):
"""
Finds all the shares that will no longer be used and removes them from
the database.
"""
t = time.time()
# allow overridable configuration defaults
chunk_size = chunk_size or current_app.config.get('cleanup_chunk_size',
10000)
sleep_interval = sleep_interval or current_app.config.get(
'cleanup_sleep_interval', 1.0)
diff = cache.get('difficulty_avg')
if diff is None:
logger.warn("Difficulty average is blank, can't safely cleanup")
return
# count all unprocessed blocks
unproc_blocks = len(
Block.query.filter_by(processed=False, merged_type=None).all())
# make sure we leave the right number of shares for unprocessed block
# to be distributed
unproc_n = unproc_blocks * current_app.config['last_n']
# plus our requested cleanup n for a safe margin
cleanup_n = current_app.config.get('cleanup_n',
4) + current_app.config['last_n']
# calculate how many n1 shares that is
total_shares = int(
round(((float(diff) * (2**16)) * (cleanup_n + unproc_n))))
logger.info("Chunk size {:,}; Sleep time {}".format(
chunk_size, sleep_interval))
logger.info("Unprocessed blocks: {}; {} Extra N kept".format(
unproc_blocks, unproc_n))
logger.info("Safety margin N from config: {}".format(cleanup_n))
logger.info("Total shares being saved: {:,}".format(total_shares))
# upper and lower iteration bounds
start_id = Share.query.order_by(Share.id.desc()).first().id + 1
stop_id = Share.query.order_by(Share.id).first().id
logger.info("Diff between first share {:,} and last {:,}: {:,}".format(
stop_id, start_id, start_id - stop_id))
rows = 0
counted_shares = 0
stale_id = 0
# iterate through shares in newest to oldest order to find the share
# id that is oldest required to be kept
while counted_shares < total_shares and start_id > stop_id:
res = (db.engine.execute(
select([Share.shares, Share.id]).order_by(Share.id.desc()).where(
Share.id >= start_id - chunk_size).where(Share.id < start_id)))
chunk = res.fetchall()
for shares, id in chunk:
rows += 1
counted_shares += shares
if counted_shares >= total_shares:
stale_id = id
break
logger.info(
"Fetched rows {:,} to {:,}. Found {:,} shares so far. Avg share/row {:,.2f}"
.format(start_id - chunk_size, start_id, counted_shares,
counted_shares / rows))
start_id -= chunk_size
if not stale_id:
logger.info("Stale ID is 0, deleting nothing.")
return
logger.info("Time to identify proper id {}".format(
datetime.timedelta(seconds=time.time() - t)))
logger.info("Rows iterated to find stale id: {:,}".format(rows))
logger.info(
"Cleaning all shares older than id {:,}, up to {:,} rows. Saving {:,} rows."
.format(stale_id, stale_id - stop_id, stale_id - start_id))
if simulate:
logger.info("Simulate mode, exiting")
return
# To prevent integrity errors, all blocks linking to a share that's
# going to be deleted needs to be updated to remove reference
Block.query.filter(Block.last_share_id <= stale_id).update(
{Block.last_share_id: None})
db.session.commit()
total_sleep = 0
total = stale_id - stop_id
remain = total
# delete all shares that are sufficiently old
while remain > 0:
bottom = stale_id - chunk_size
res = (Share.query.filter(Share.id < stale_id).filter(
Share.id >= bottom).delete(synchronize_session=False))
db.session.commit()
remain -= chunk_size
logger.info(
"Deleted {:,} rows from {:,} to {:,}\t{:,.4f}\t{:,}".format(
res, stale_id, bottom, remain * 100.0 / total, remain))
stale_id -= chunk_size
if res: # only sleep if we actually deleted something
sleep(sleep_interval)
total_sleep += sleep_interval
logger.info("Time to completion {}".format(
datetime.timedelta(time.time() - t)))
logger.info("Time spent sleeping {}".format(
datetime.timedelta(seconds=total_sleep)))
def chain_cleanup(chain, dont_simulate):
""" Handles removing all redis share slices that we are fairly certain won't
be needed to credit a block if one were to be solved in the future. """
if not chain.currencies:
current_app.logger.warn(
"Unable to run share slice cleanup on chain {} since currencies "
"aren't specified!".format(chain.id))
return
# Get the current sharechain index from redis
current_index = int(redis_conn.get("chain_{}_slice_index".format(chain.id)) or 0)
if not current_index:
current_app.logger.warn(
"Index couldn't be determined for chain {}".format(chain.id))
return
# Find the maximum average difficulty of all currencies on this sharechain
max_diff = 0
max_diff_currency = None
for currency in chain.currencies:
currency_data = cache.get("{}_data".format(currency.key))
if not currency_data or currency_data['difficulty_avg_stale']:
current_app.logger.warn(
"Cache doesn't accurate enough average diff for {} to cleanup chain {}"
.format(currency, chain.id))
return
if currency_data['difficulty_avg'] > max_diff:
max_diff = currency_data['difficulty_avg']
max_diff_currency = currency
assert max_diff != 0
hashes_to_solve = max_diff * (2 ** 32)
shares_to_solve = hashes_to_solve / chain.algo.hashes_per_share
shares_to_keep = shares_to_solve * chain.safety_margin
if chain.type == "pplns":
shares_to_keep *= chain.last_n
current_app.logger.info(
"Keeping {:,} shares based on max diff {} for {} on chain {}"
.format(shares_to_keep, max_diff, max_diff_currency, chain.id))
# Delete any shares past shares_to_keep
found_shares = 0
empty_slices = 0
iterations = 0
for index in xrange(current_index, -1, -1):
iterations += 1
slc_key = "chain_{}_slice_{}".format(chain.id, index)
key_type = redis_conn.type(slc_key)
# Fetch slice information
if key_type == "list":
empty_slices = 0
# For speed sake, ignore uncompressed slices
continue
elif key_type == "hash":
empty_slices = 0
found_shares += float(redis_conn.hget(slc_key, "total_shares"))
elif key_type == "none":
empty_slices += 1
else:
raise Exception("Unexpected slice key type {}".format(key_type))
if found_shares >= shares_to_keep or empty_slices >= 20:
break
if found_shares < shares_to_keep:
current_app.logger.info(
"Not enough shares {:,}/{:,} for cleanup on chain {}"
.format(found_shares, shares_to_keep, chain.id))
return
current_app.logger.info("Found {:,} shares after {:,} iterations"
.format(found_shares, iterations))
# Delete all share slices older than the last index found
oldest_kept = index - 1
empty_found = 0
deleted_count = 0
for index in xrange(oldest_kept, -1, -1):
if empty_found >= 20:
current_app.logger.debug("20 empty in a row, exiting")
break
key = "chain_{}_slice_{}".format(chain, index)
if redis_conn.type(key) == "none":
empty_found += 1
else:
empty_found = 0
if dont_simulate:
if redis_conn.delete(key):
deleted_count += 1
else:
current_app.logger.info("Would delete {}".format(key))
if dont_simulate:
current_app.logger.info(
"Deleted {} total share slices from #{:,}->{:,}"
.format(deleted_count, oldest_kept, index))
def chain_cleanup(chain, dont_simulate):
""" Handles removing all redis share slices that we are fairly certain won't
be needed to credit a block if one were to be solved in the future. """
if not chain.currencies:
current_app.logger.warn(
"Unable to run share slice cleanup on chain {} since currencies "
"aren't specified!".format(chain.id))
return
# Get the current sharechain index from redis
current_index = int(redis_conn.get("chain_{}_slice_index".format(chain.id)) or 0)
if not current_index:
current_app.logger.warn(
"Index couldn't be determined for chain {}".format(chain.id))
return
# Find the maximum average difficulty of all currencies on this sharechain
max_diff = 0
max_diff_currency = None
for currency in chain.currencies:
currency_data = cache.get("{}_data".format(currency.key))
if not currency_data or currency_data['difficulty_avg_stale']:
current_app.logger.warn(
"Cache doesn't accurate enough average diff for {} to cleanup chain {}"
.format(currency, chain.id))
return
if currency_data['difficulty_avg'] > max_diff:
max_diff = currency_data['difficulty_avg']
max_diff_currency = currency
assert max_diff != 0
hashes_to_solve = max_diff * (2 ** 32)
shares_to_solve = hashes_to_solve / chain.algo.hashes_per_share
shares_to_keep = shares_to_solve * chain.safety_margin
if chain.type == "pplns":
shares_to_keep *= chain.last_n
current_app.logger.info(
"Keeping {:,} shares based on max diff {} for {} on chain {}"
.format(shares_to_keep, max_diff, max_diff_currency, chain.id))
# Delete any shares past shares_to_keep
found_shares = 0
empty_slices = 0
iterations = 0
for index in xrange(current_index, -1, -1):
iterations += 1
slc_key = "chain_{}_slice_{}".format(chain.id, index)
key_type = redis_conn.type(slc_key)
# Fetch slice information
if key_type == "list":
empty_slices = 0
# For speed sake, ignore uncompressed slices
continue
elif key_type == "hash":
empty_slices = 0
found_shares += float(redis_conn.hget(slc_key, "total_shares"))
elif key_type == "none":
empty_slices += 1
else:
raise Exception("Unexpected slice key type {}".format(key_type))
if found_shares >= shares_to_keep or empty_slices >= 20:
break
if found_shares < shares_to_keep:
current_app.logger.info(
"Not enough shares {:,}/{:,} for cleanup on chain {}"
.format(found_shares, shares_to_keep, chain.id))
return
current_app.logger.info("Found {:,} shares after {:,} iterations"
.format(found_shares, iterations))
# Delete all share slices older than the last index found
oldest_kept = index - 1
empty_found = 0
deleted_count = 0
for index in xrange(oldest_kept, -1, -1):
if empty_found >= 20:
current_app.logger.debug("20 empty in a row, exiting")
break
key = "chain_{}_slice_{}".format(chain, index)
if redis_conn.type(key) == "none":
empty_found += 1
else:
empty_found = 0
if dont_simulate:
if redis_conn.delete(key):
deleted_count += 1
else:
current_app.logger.info("Would delete {}".format(key))
if dont_simulate:
current_app.logger.info(
"Deleted {} total share slices from #{:,}->{:,}"
.format(deleted_count, oldest_kept, index))
