def loadSplitPointsFromMeta(metaUri):
if not metaUri.startswith('meta+'):
raise ValueError('not a meta table: %r' % metaUri)
metaUri = metaUri[5:]
import urllib,cgi
p,q = urllib.splitquery(metaUri)
q = cgi.parse_qs(q or '')
tableName = q.get('name',[''])[0]
if not tableName:
raise ValueError('meta uri needs table name')
from util.zero import zeroEncode,zeroDecode
pred = '%r <= row < %r and column = "location"' % \
(zeroEncode(tableName, '\x01', ''),
zeroEncode(tableName, '\x02', ''))
rows = []
import pykdi
for r,c,t,v in pykdi.Table(metaUri).scan(pred):
n,x,r = zeroDecode(r)
rows.append(r)
f = 1.0 / (len(rows) + 1)
return [((i+1)*f, r) for i,r in enumerate(rows)]
def loadSplitPointsFromMeta(metaUri):
if not metaUri.startswith('meta+'):
raise ValueError('not a meta table: %r' % metaUri)
metaUri = metaUri[5:]
import urllib, cgi
p, q = urllib.splitquery(metaUri)
q = cgi.parse_qs(q or '')
tableName = q.get('name', [''])[0]
if not tableName:
raise ValueError('meta uri needs table name')
from util.zero import zeroEncode, zeroDecode
pred = '%r <= row < %r and column = "location"' % \
(zeroEncode(tableName, '\x01', ''),
zeroEncode(tableName, '\x02', ''))
rows = []
import pykdi
for r, c, t, v in pykdi.Table(metaUri).scan(pred):
n, x, r = zeroDecode(r)
rows.append(r)
f = 1.0 / (len(rows) + 1)
return [((i + 1) * f, r) for i, r in enumerate(rows)]
def main():
import optparse
op = optparse.OptionParser()
op.add_option('-m', '--meta', help='Location of META table')
op.add_option('-n',
'--dryrun',
action='store_true',
help="Print but don't do")
opt, args = op.parse_args()
if not opt.meta:
op.error('need --meta')
meta = pykdi.Table(opt.meta)
scan = meta.scan('column = "config"')
if opt.dryrun:
meta.set = makeEcho('meta.set')
meta.erase = makeEcho('meta.erase')
meta.sync = makeEcho('meta.sync')
lastMatch = None
joinMin = None
sameKeys = []
for r, c, t, v in scan:
if opt.dryrun:
print 'scan:', (r, c, t, v)
table = zeroDecode(r)[0]
server, minRow, frags = parseConfig(v)
match = table, server, frags
if match != lastMatch:
if len(sameKeys) > 1:
joinTablets(meta, sameKeys, lastMatch[1], joinMin,
lastMatch[2])
joinMin = minRow
sameKeys = []
sameKeys.append((r, c, t))
lastMatch = match
if len(sameKeys) > 1:
joinTablets(meta, sameKeys, lastMatch[1], joinMin, lastMatch[2])
meta.sync()
def main():
import optparse
op = optparse.OptionParser()
op.add_option('-m','--meta',help='Location of META table')
op.add_option('-n','--dryrun',action='store_true',
help="Print but don't do")
opt,args = op.parse_args()
if not opt.meta:
op.error('need --meta')
meta = pykdi.Table(opt.meta)
scan = meta.scan('column = "config"')
if opt.dryrun:
meta.set = makeEcho('meta.set')
meta.erase = makeEcho('meta.erase')
meta.sync = makeEcho('meta.sync')
lastMatch = None
joinMin = None
sameKeys = []
for r,c,t,v in scan:
if opt.dryrun:
print 'scan:', (r,c,t,v)
table = zeroDecode(r)[0]
server,minRow,frags = parseConfig(v)
match = table,server,frags
if match != lastMatch:
if len(sameKeys) > 1:
joinTablets(meta, sameKeys, lastMatch[1], joinMin,
lastMatch[2])
joinMin = minRow
sameKeys = []
sameKeys.append((r,c,t))
lastMatch = match
if len(sameKeys) > 1:
joinTablets(meta, sameKeys, lastMatch[1], joinMin, lastMatch[2])
meta.sync()
def updateLocations(meta, port):
import pykdi
from util.props import Properties
from cStringIO import StringIO
from util.zero import zeroDecode
# Open META table
metaTable = pykdi.Table(meta)
# Go through 'config' cells, extract 'server' variable, and write
# 'location' cells
for row,col,time,val in metaTable.scan('column = "config"'):
table,dummy,last = zeroDecode(row)
cfg = Properties(StringIO(val))
loc = 'kdi://%s:%s/%s' % (cfg.get('server'), port, table)
metaTable.set(row, 'location', time, loc)
# Sync changes
metaTable.sync()
