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#!/usr/bin/env python
#
# Public Domain 2014-2020 MongoDB, Inc.
# Public Domain 2008-2014 WiredTiger, Inc.
#
# This is free and unencumbered software released into the public domain.
#
# Anyone is free to copy, modify, publish, use, compile, sell, or
# distribute this software, either in source code form or as a compiled
# binary, for any purpose, commercial or non-commercial, and by any
# means.
#
# In jurisdictions that recognize copyright laws, the author or authors
# of this software dedicate any and all copyright interest in the
# software to the public domain. We make this dedication for the benefit
# of the public at large and to the detriment of our heirs and
# successors. We intend this dedication to be an overt act of
# relinquishment in perpetuity of all present and future rights to this
# software under copyright law.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
# EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
# MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
# IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY CLAIM, DAMAGES OR
# OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
# ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
# OTHER DEALINGS IN THE SOFTWARE.
import wiredtiger
import os, shutil
from wtbackup import backup_base
from wtdataset import simple_key
from wtscenario import make_scenarios
import glob
# test_backup15.py
# Test cursor backup with a block-based incremental cursor.
class test_backup15(backup_base):
bkp_home = "WT_BLOCK"
counter=0
conn_config='cache_size=1G,log=(enabled,file_max=100K)'
logmax="100K"
max_iteration=5
mult=0
nops=100000
savefirst=0
savekey='NOTSET'
uri="table:main"
dir='backup.dir' # Backup directory name
home_full = "WT_BLOCK_LOG_FULL"
home_incr = "WT_BLOCK_LOG_INCR"
logpath = "logpath"
new_table=False
initial_backup=False
pfx = 'test_backup'
# Set the key and value big enough that we modify a few blocks.
bigkey = 'Key' * 100
bigval = 'Value' * 100
def range_copy(self, filename, offset, size):
read_from = filename
old_to = self.home_incr + '.' + str(self.counter - 1) + '/' + filename
write_to = self.home_incr + '.' + str(self.counter) + '/' + filename
rfp = open(read_from, "r+b")
self.pr('RANGE CHECK file ' + old_to + ' offset ' + str(offset) + ' len ' + str(size))
rfp2 = open(old_to, "r+b")
rfp.seek(offset, 0)
rfp2.seek(offset, 0)
buf = rfp.read(size)
buf2 = rfp2.read(size)
# This assertion tests that the offset range we're given actually changed
# from the previous backup.
self.assertNotEqual(buf, buf2)
wfp = open(write_to, "w+b")
wfp.seek(offset, 0)
wfp.write(buf)
rfp.close()
rfp2.close()
wfp.close()
def take_full_backup(self):
if self.counter != 0:
hdir = self.home_full + '.' + str(self.counter)
else:
hdir = self.home_incr
#
# First time through we take a full backup into the incremental directories. Otherwise only
# into the appropriate full directory.
#
buf = None
if self.initial_backup == True:
buf = 'incremental=(granularity=1M,enabled=true,this_id=ID0)'
bkup_c = self.session.open_cursor('backup:', None, buf)
# We cannot use 'for newfile in bkup_c:' usage because backup cursors don't have
# values and adding in get_values returns ENOTSUP and causes the usage to fail.
# If that changes then this, and the use of the duplicate below can change.
while True:
ret = bkup_c.next()
if ret != 0:
break
newfile = bkup_c.get_key()
if self.counter == 0:
# Take a full backup into each incremental directory
for i in range(0, self.max_iteration):
copy_from = newfile
# If it is a log file, prepend the path.
if ("WiredTigerLog" in newfile):
copy_to = self.home_incr + '.' + str(i) + '/' + self.logpath
else:
copy_to = self.home_incr + '.' + str(i)
shutil.copy(copy_from, copy_to)
else:
copy_from = newfile
# If it is log file, prepend the path.
if ("WiredTigerLog" in newfile):
copy_to = hdir + '/' + self.logpath
else:
copy_to = hdir
shutil.copy(copy_from, copy_to)
self.assertEqual(ret, wiredtiger.WT_NOTFOUND)
bkup_c.close()
def take_incr_backup(self):
self.assertTrue(self.counter > 0)
# Open the backup data source for incremental backup.
buf = 'incremental=(src_id="ID' + str(self.counter - 1) + '",this_id="ID' + str(self.counter) + '")'
self.pr(buf)
bkup_c = self.session.open_cursor('backup:', None, buf)
# We cannot use 'for newfile in bkup_c:' usage because backup cursors don't have
# values and adding in get_values returns ENOTSUP and causes the usage to fail.
# If that changes then this, and the use of the duplicate below can change.
while True:
ret = bkup_c.next()
if ret != 0:
break
newfile = bkup_c.get_key()
h = self.home_incr + '.0'
copy_from = newfile
# If it is log file, prepend the path.
if ("WiredTigerLog" in newfile):
copy_to = h + '/' + self.logpath
else:
copy_to = h
shutil.copy(copy_from, copy_to)
first = True
config = 'incremental=(file=' + newfile + ')'
dup_cnt = 0
# For each file listed, open a duplicate backup cursor and copy the blocks.
incr_c = self.session.open_cursor(None, bkup_c, config)
# We cannot use 'for newfile in incr_c:' usage because backup cursors don't have
# values and adding in get_values returns ENOTSUP and causes the usage to fail.
# If that changes then this, and the use of the duplicate below can change.
while True:
ret = incr_c.next()
if ret != 0:
break
incrlist = incr_c.get_keys()
offset = incrlist[0]
size = incrlist[1]
curtype = incrlist[2]
self.assertTrue(curtype == wiredtiger.WT_BACKUP_FILE or curtype == wiredtiger.WT_BACKUP_RANGE)
if curtype == wiredtiger.WT_BACKUP_FILE:
# Copy the whole file.
if first == True:
h = self.home_incr + '.' + str(self.counter)
first = False
copy_from = newfile
if ("WiredTigerLog" in newfile):
copy_to = h + '/' + self.logpath
else:
copy_to = h
shutil.copy(copy_from, copy_to)
else:
# Copy the block range.
self.pr('Range copy file ' + newfile + ' offset ' + str(offset) + ' len ' + str(size))
self.range_copy(newfile, offset, size)
dup_cnt += 1
self.assertEqual(ret, wiredtiger.WT_NOTFOUND)
incr_c.close()
# For each file, we want to copy it into each of the later incremental directories.
for i in range(self.counter, self.max_iteration):
h = self.home_incr + '.' + str(i)
copy_from = newfile
if ("WiredTigerLog" in newfile):
copy_to = h + '/' + self.logpath
else:
copy_to = h
shutil.copy(copy_from, copy_to)
self.assertEqual(ret, wiredtiger.WT_NOTFOUND)
bkup_c.close()
#
# Add data to the given uri.
#
def add_complex_data(self, uri):
c = self.session.open_cursor(uri, None, None)
# The first time we want to add in a lot of data. Then after that we want to
# rapidly change a single key to create a hotspot in one block.
if self.savefirst < 2:
nops = self.nops
else:
nops = self.nops // 10
for i in range(0, nops):
num = i + (self.mult * nops)
if self.savefirst >= 2:
key = self.savekey
else:
key = str(num) + self.bigkey + str(num)
val = str(num) + self.bigval + str(num)
c[key] = val
if self.savefirst == 0:
self.savekey = key
self.savefirst += 1
c.close()
# Increase the multiplier so that later calls insert unique items.
self.mult += 1
# Increase the counter so that later backups have unique ids.
if self.initial_backup == False:
self.counter += 1
def test_backup15(self):
os.mkdir(self.bkp_home)
self.home = self.bkp_home
self.session.create(self.uri, "key_format=S,value_format=S")
self.setup_directories(self.max_iteration, self.home_incr, self.home_full, self.logpath)
self.pr('*** Add data, checkpoint, take backups and validate ***')
self.pr('Adding initial data')
self.initial_backup = True
self.add_complex_data(self.uri)
self.take_full_backup()
self.initial_backup = False
self.session.checkpoint()
# Each call now to take a full backup will make a copy into a full directory. Then
# each incremental will take an incremental backup and we can compare them.
for i in range(1, self.max_iteration):
self.add_complex_data(self.uri)
self.session.checkpoint()
# Swap the order of the full and incremental backups. It should not matter. They
# should not interfere with each other.
if i % 2 == 0:
self.take_full_backup()
self.take_incr_backup()
else:
self.take_incr_backup()
self.take_full_backup()
self.compare_backups(self.uri, self.home_full, self.home_incr, str(self.counter))
if __name__ == '__main__':
wttest.run()
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