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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 fnmatch, os, shutil, sys
from suite_subprocess import suite_subprocess
import wiredtiger, wttest
from wtscenario import make_scenarios
# test_schema08.py
# Test schema operations on recovery.
# Test all schema operations alter, create, drop, rename.
# After doing the operation, create a backup copy of the directory,
# walk the log recording each LSN, truncate the backup copy of the
# log walking backward from the LSNs and then run recovery.
class test_schema08(wttest.WiredTigerTestCase, suite_subprocess):
# We want to copy, truncate and run recovery so keep the log
# file small and don't pre-allocate any. We expect a small log.
conn_config = 'log=(enabled,archive=false,file_max=100k,prealloc=false)'
types = [
('file', dict(uri='file:', use_cg=False, use_index=False)),
('lsm', dict(uri='lsm:', use_cg=False, use_index=False)),
('table-cg', dict(uri='table:', use_cg=True, use_index=False)),
('table-index', dict(uri='table:', use_cg=False, use_index=True)),
('table-simple', dict(uri='table:', use_cg=False, use_index=False)),
]
ops = [
('none', dict(schema_ops='none')),
('alter', dict(schema_ops='alter')),
('drop', dict(schema_ops='drop')),
('rename', dict(schema_ops='rename')),
]
ckpt = [
('no_ckpt', dict(ckpt=False)),
('with_ckpt', dict(ckpt=True)),
]
scenarios = make_scenarios(types, ops, ckpt)
count = 0
lsns = []
backup_pfx = "BACKUP."
def do_alter(self, uri, suburi):
alter_param = 'cache_resident=true'
self.session.alter(uri, alter_param)
if suburi != None:
self.session.alter(suburi, alter_param)
def do_ops(self, uri, suburi):
if (self.schema_ops == 'none'):
return
if (self.schema_ops == 'alter'):
self.do_alter(uri, suburi)
elif (self.schema_ops == 'drop'):
self.session.drop(uri, None)
elif (self.schema_ops == 'rename'):
newuri = self.uri + "new-table"
self.session.rename(uri, newuri, None)
# Count actual log records in the log. Log cursors walk the individual
# operations of a transaction as well as the entire record. Skip counting
# any individual commit operations and only count entire records.
def find_logrecs(self):
self.count = 0
self.session.log_flush('sync=on')
c = self.session.open_cursor('log:', None, None)
self.lsns.append(0)
while c.next() == 0:
# lsn.file, lsn.offset, opcount
keys = c.get_key()
# We don't expect to need more than one log file. We only store
# the offsets in a list so assert lsn.file is 1.
self.assertTrue(keys[0] == 1)
# Only count whole records, which is when opcount is zero.
# If opcount is not zero it is an operation of a commit.
# Skip LSN 128, that is a system record and its existence
# is assumed within the system.
if keys[2] == 0 and keys[1] != 128:
self.count += 1
self.lsns.append(keys[1])
c.close()
self.pr("Find " + str(self.count) + " logrecs LSNS: ")
self.pr(str(self.lsns))
def make_backups(self):
# With the connection still open, copy files to the new directory.
# Make an initial copy as well as a copy for each LSN we save.
# Truncate the log to the appropriate offset as we make each copy.
olddir = "."
log1 = 'WiredTigerLog.0000000001'
for lsn in self.lsns:
newdir = self.backup_pfx + str(lsn)
shutil.rmtree(newdir, ignore_errors=True)
os.mkdir(newdir)
for fname in os.listdir(olddir):
fullname = os.path.join(olddir, fname)
# Skip lock file on Windows since it is locked
if os.path.isfile(fullname) and \
"WiredTiger.lock" not in fullname and \
"Tmplog" not in fullname and \
"Preplog" not in fullname:
shutil.copy(fullname, newdir)
# Truncate the file to the LSN offset.
# NOTE: This removes the record at that offset
# resulting in recovery running to just before
# that record.
if lsn != 0:
logf = os.path.join(newdir + '/' + log1)
f = open(logf, "r+")
f.truncate(lsn)
f.close()
# print "New size " + logf + ": " + str(os.path.getsize(logf))
def run_recovery(self, uri, suburi):
# With the connection still open, copy files to the new directory.
# Make an initial copy as well as a copy for each LSN we save.
# Truncate the log to the appropriate offset as we make each copy.
olddir = "."
for lsn in self.lsns:
newdir = self.backup_pfx + str(lsn)
outfile = newdir + '.txt'
self.runWt(['-R', '-h', newdir, 'list', '-v'], outfilename=outfile)
# Test that creating and dropping tables does not write individual
# log records.
def test_schema08_create(self):
self.count = 0
self.lsns = []
uri = self.uri + 'table0'
create_params = 'key_format=i,value_format=S,'
cgparam = ''
suburi = None
if self.use_cg or self.use_index:
cgparam = 'columns=(k,v),'
if self.use_cg:
cgparam += 'colgroups=(g0),'
# Create main table.
self.session.create(uri, create_params + cgparam)
# Checkpoint after the main table creation if wanted.
if self.ckpt:
self.session.checkpoint()
# Add in column group or index tables.
if self.use_cg:
# Create.
cgparam = 'columns=(v),'
suburi = 'colgroup:table0:g0'
self.session.create(suburi, cgparam)
if self.use_index:
# Create.
suburi = 'index:table0:i0'
self.session.create(suburi, cgparam)
self.do_ops(uri, suburi)
self.find_logrecs()
# print "Found " + str(self.count) + " log records"
self.make_backups()
self.run_recovery(uri, suburi)
if __name__ == '__main__':
wttest.run()
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