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- Committer: John Arbash Meinel
- Date: 2009-03-11 06:26:22 UTC
- mfrom: (0.17.46 groupcompress)
- mto: (3735.2.143 brisbane-core)
- mto: This revision was merged to the branch mainline in revision 4280.
- Revision ID: john@arbash-meinel.com-20090311062622-ft46p7njj9mrh1vs
Bring the groupcompress plugin into the brisbane-core branch.
- files added:
- bzrlib/_groupcompress_pyx.pyx
- files modified:
- .bzrignore
added
removed
bzrlib/repofmt/gc_repo.py
1
# groupcompress, a bzr plugin providing improved disk utilisation
2
# Copyright (C) 2008 Canonical Limited.
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#
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# This program is free software; you can redistribute it and/or modify
5
# it under the terms of the GNU General Public License version 2 as published
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# by the Free Software Foundation.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program; if not, write to the Free Software
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# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
16
#
17
18
"""Repostory formats using B+Tree indices and groupcompress compression."""
19
20
import md5
21
import time
22
23
from bzrlib import (
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debug,
25
errors,
26
knit,
27
inventory,
28
pack,
29
repository,
30
trace,
31
ui,
32
)
33
from bzrlib.btree_index import (
34
BTreeBuilder,
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BTreeGraphIndex,
36
)
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from bzrlib.index import GraphIndex, GraphIndexBuilder
38
from bzrlib.repository import InterPackRepo
39
from bzrlib.groupcompress import (
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_GCGraphIndex,
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GroupCompressVersionedFiles,
42
)
43
from bzrlib.osutils import rand_chars
44
from bzrlib.repofmt.pack_repo import (
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Pack,
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NewPack,
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KnitPackRepository,
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RepositoryPackCollection,
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RepositoryFormatKnitPack6,
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RepositoryFormatKnitPack6RichRoot,
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Packer,
52
ReconcilePacker,
53
OptimisingPacker,
54
)
55
try:
56
from bzrlib.repofmt.pack_repo import (
57
CHKInventoryRepository,
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RepositoryFormatPackDevelopment5,
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RepositoryFormatPackDevelopment5Hash16,
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## RepositoryFormatPackDevelopment5Hash16b,
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## RepositoryFormatPackDevelopment5Hash63,
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## RepositoryFormatPackDevelopment5Hash127a,
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## RepositoryFormatPackDevelopment5Hash127b,
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RepositoryFormatPackDevelopment5Hash255,
65
)
66
from bzrlib import chk_map
67
chk_support = True
68
except ImportError:
69
chk_support = False
70
71
72
def open_pack(self):
73
return self._pack_collection.pack_factory(self._pack_collection,
74
upload_suffix=self.suffix,
75
file_mode=self._pack_collection.repo.bzrdir._get_file_mode())
76
77
78
Packer.open_pack = open_pack
79
80
81
class GCPack(NewPack):
82
83
def __init__(self, pack_collection, upload_suffix='', file_mode=None):
84
"""Create a NewPack instance.
85
86
:param pack_collection: A PackCollection into which this is being
87
inserted.
88
:param upload_suffix: An optional suffix to be given to any temporary
89
files created during the pack creation. e.g '.autopack'
90
:param file_mode: An optional file mode to create the new files with.
91
"""
92
# replaced from bzr.dev to:
93
# - change inventory reference list length to 1
94
# - change texts reference lists to 1
95
# TODO: patch this to be parameterised upstream
96
97
# The relative locations of the packs are constrained, but all are
98
# passed in because the caller has them, so as to avoid object churn.
99
index_builder_class = pack_collection._index_builder_class
100
if chk_support:
101
# from brisbane-core
102
if pack_collection.chk_index is not None:
103
chk_index = index_builder_class(reference_lists=0)
104
else:
105
chk_index = None
106
Pack.__init__(self,
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# Revisions: parents list, no text compression.
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index_builder_class(reference_lists=1),
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# Inventory: We want to map compression only, but currently the
110
# knit code hasn't been updated enough to understand that, so we
111
# have a regular 2-list index giving parents and compression
112
# source.
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index_builder_class(reference_lists=1),
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# Texts: compression and per file graph, for all fileids - so two
115
# reference lists and two elements in the key tuple.
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index_builder_class(reference_lists=1, key_elements=2),
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# Signatures: Just blobs to store, no compression, no parents
118
# listing.
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index_builder_class(reference_lists=0),
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# CHK based storage - just blobs, no compression or parents.
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chk_index=chk_index
122
)
123
else:
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# from bzr.dev
125
Pack.__init__(self,
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# Revisions: parents list, no text compression.
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index_builder_class(reference_lists=1),
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# Inventory: compressed, with graph for compatibility with other
129
# existing bzrlib code.
130
index_builder_class(reference_lists=1),
131
# Texts: per file graph:
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index_builder_class(reference_lists=1, key_elements=2),
133
# Signatures: Just blobs to store, no compression, no parents
134
# listing.
135
index_builder_class(reference_lists=0),
136
)
137
self._pack_collection = pack_collection
138
# When we make readonly indices, we need this.
139
self.index_class = pack_collection._index_class
140
# where should the new pack be opened
141
self.upload_transport = pack_collection._upload_transport
142
# where are indices written out to
143
self.index_transport = pack_collection._index_transport
144
# where is the pack renamed to when it is finished?
145
self.pack_transport = pack_collection._pack_transport
146
# What file mode to upload the pack and indices with.
147
self._file_mode = file_mode
148
# tracks the content written to the .pack file.
149
self._hash = md5.new()
150
# a four-tuple with the length in bytes of the indices, once the pack
151
# is finalised. (rev, inv, text, sigs)
152
self.index_sizes = None
153
# How much data to cache when writing packs. Note that this is not
154
# synchronised with reads, because it's not in the transport layer, so
155
# is not safe unless the client knows it won't be reading from the pack
156
# under creation.
157
self._cache_limit = 0
158
# the temporary pack file name.
159
self.random_name = rand_chars(20) + upload_suffix
160
# when was this pack started ?
161
self.start_time = time.time()
162
# open an output stream for the data added to the pack.
163
self.write_stream = self.upload_transport.open_write_stream(
164
self.random_name, mode=self._file_mode)
165
if 'pack' in debug.debug_flags:
166
trace.mutter('%s: create_pack: pack stream open: %s%s t+%6.3fs',
167
time.ctime(), self.upload_transport.base, self.random_name,
168
time.time() - self.start_time)
169
# A list of byte sequences to be written to the new pack, and the
170
# aggregate size of them. Stored as a list rather than separate
171
# variables so that the _write_data closure below can update them.
172
self._buffer = [[], 0]
173
# create a callable for adding data
174
#
175
# robertc says- this is a closure rather than a method on the object
176
# so that the variables are locals, and faster than accessing object
177
# members.
178
def _write_data(bytes, flush=False, _buffer=self._buffer,
179
_write=self.write_stream.write, _update=self._hash.update):
180
_buffer[0].append(bytes)
181
_buffer[1] += len(bytes)
182
# buffer cap
183
if _buffer[1] > self._cache_limit or flush:
184
bytes = ''.join(_buffer[0])
185
_write(bytes)
186
_update(bytes)
187
_buffer[:] = [[], 0]
188
# expose this on self, for the occasion when clients want to add data.
189
self._write_data = _write_data
190
# a pack writer object to serialise pack records.
191
self._writer = pack.ContainerWriter(self._write_data)
192
self._writer.begin()
193
# what state is the pack in? (open, finished, aborted)
194
self._state = 'open'
195
196
197
RepositoryPackCollection.pack_factory = NewPack
198
199
class GCRepositoryPackCollection(RepositoryPackCollection):
200
201
pack_factory = GCPack
202
203
def _make_index(self, name, suffix):
204
"""Overridden to use BTreeGraphIndex objects."""
205
size_offset = self._suffix_offsets[suffix]
206
index_name = name + suffix
207
index_size = self._names[name][size_offset]
208
return BTreeGraphIndex(
209
self._index_transport, index_name, index_size)
210
211
def _start_write_group(self):
212
# Overridden to add 'self.pack_factory()'
213
# Do not permit preparation for writing if we're not in a 'write lock'.
214
if not self.repo.is_write_locked():
215
raise errors.NotWriteLocked(self)
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self._new_pack = self.pack_factory(self, upload_suffix='.pack',
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file_mode=self.repo.bzrdir._get_file_mode())
218
# allow writing: queue writes to a new index
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self.revision_index.add_writable_index(self._new_pack.revision_index,
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self._new_pack)
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self.inventory_index.add_writable_index(self._new_pack.inventory_index,
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self._new_pack)
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self.text_index.add_writable_index(self._new_pack.text_index,
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self._new_pack)
225
self.signature_index.add_writable_index(self._new_pack.signature_index,
226
self._new_pack)
227
if chk_support and self.chk_index is not None:
228
self.chk_index.add_writable_index(self._new_pack.chk_index,
229
self._new_pack)
230
self.repo.chk_bytes._index._add_callback = self.chk_index.add_callback
231
232
self.repo.inventories._index._add_callback = self.inventory_index.add_callback
233
self.repo.revisions._index._add_callback = self.revision_index.add_callback
234
self.repo.signatures._index._add_callback = self.signature_index.add_callback
235
self.repo.texts._index._add_callback = self.text_index.add_callback
236
237
def _get_filtered_inv_stream(self, source_vf, keys, pb=None):
238
"""Filter the texts of inventories, to find the chk pages."""
239
id_roots = []
240
p_id_roots = []
241
id_roots_set = set()
242
p_id_roots_set = set()
243
total_keys = len(keys)
244
def _filter_inv_stream(stream):
245
for idx, record in enumerate(stream):
246
### child_pb.update('fetch inv', idx, len(inv_keys_to_fetch))
247
bytes = record.get_bytes_as('fulltext')
248
chk_inv = inventory.CHKInventory.deserialise(None, bytes, record.key)
249
if pb is not None:
250
pb.update('inv', idx, total_keys)
251
key = chk_inv.id_to_entry.key()
252
if key not in id_roots_set:
253
id_roots.append(key)
254
id_roots_set.add(key)
255
p_id_map = chk_inv.parent_id_basename_to_file_id
256
if p_id_map is not None:
257
key = p_id_map.key()
258
if key not in p_id_roots_set:
259
p_id_roots_set.add(key)
260
p_id_roots.append(key)
261
yield record
262
stream = source_vf.get_record_stream(keys, 'gc-optimal', True)
263
return _filter_inv_stream(stream), id_roots, p_id_roots
264
265
def _get_chk_stream(self, source_vf, keys, id_roots, p_id_roots, pb=None):
266
# We want to stream the keys from 'id_roots', and things they
267
# reference, and then stream things from p_id_roots and things they
268
# reference, and then any remaining keys that we didn't get to.
269
270
# We also group referenced texts together, so if one root references a
271
# text with prefix 'a', and another root references a node with prefix
272
# 'a', we want to yield those nodes before we yield the nodes for 'b'
273
# This keeps 'similar' nodes together.
274
275
# Note: We probably actually want multiple streams here, to help the
276
# client understand that the different levels won't compress well
277
# against each other.
278
# Test the difference between using one Group per level, and
279
# using 1 Group per prefix. (so '' (root) would get a group, then
280
# all the references to search-key 'a' would get a group, etc.)
281
total_keys = len(keys)
282
remaining_keys = set(keys)
283
counter = [0]
284
def _get_referenced_stream(root_keys):
285
cur_keys = root_keys
286
while cur_keys:
287
keys_by_search_prefix = {}
288
remaining_keys.difference_update(cur_keys)
289
next_keys = set()
290
stream = source_vf.get_record_stream(cur_keys, 'as-requested',
291
True)
292
def next_stream():
293
for record in stream:
294
bytes = record.get_bytes_as('fulltext')
295
# We don't care about search_key_func for this code,
296
# because we only care about external references.
297
node = chk_map._deserialise(bytes, record.key,
298
search_key_func=None)
299
common_base = node._search_prefix
300
if isinstance(node, chk_map.InternalNode):
301
for prefix, value in node._items.iteritems():
302
if not isinstance(value, tuple):
303
raise AssertionError("value is %s when"
304
" tuple expected" % (value.__class__))
305
if value not in next_keys:
306
keys_by_search_prefix.setdefault(prefix,
307
[]).append(value)
308
next_keys.add(value)
309
counter[0] += 1
310
if pb is not None:
311
pb.update('chk node', counter[0], total_keys)
312
yield record
313
yield next_stream()
314
# Double check that we won't be emitting any keys twice
315
next_keys = next_keys.intersection(remaining_keys)
316
cur_keys = []
317
for prefix in sorted(keys_by_search_prefix):
318
cur_keys.extend(keys_by_search_prefix[prefix])
319
for stream in _get_referenced_stream(id_roots):
320
yield stream
321
for stream in _get_referenced_stream(p_id_roots):
322
yield stream
323
if remaining_keys:
324
trace.note('There were %d keys in the chk index, which were not'
325
' referenced from inventories', len(remaining_keys))
326
stream = source_vf.get_record_stream(remaining_keys, 'unordered',
327
True)
328
yield stream
329
330
def _execute_pack_operations(self, pack_operations, _packer_class=Packer,
331
reload_func=None):
332
"""Execute a series of pack operations.
333
334
:param pack_operations: A list of [revision_count, packs_to_combine].
335
:param _packer_class: The class of packer to use (default: Packer).
336
:return: None.
337
"""
338
for revision_count, packs in pack_operations:
339
# we may have no-ops from the setup logic
340
if len(packs) == 0:
341
continue
342
# Create a new temp VersionedFile instance based on these packs,
343
# and then just fetch everything into the target
344
345
to_copy = [('revision_index', 'revisions'),
346
('inventory_index', 'inventories'),
347
('text_index', 'texts'),
348
('signature_index', 'signatures'),
349
]
350
# TODO: This is a very non-optimal ordering for chk_bytes. The
351
# issue is that pages that are similar are not transmitted
352
# together. Perhaps get_record_stream('gc-optimal') should be
353
# taught about how to group chk pages?
354
has_chk = False
355
if getattr(self, 'chk_index', None) is not None:
356
has_chk = True
357
to_copy.insert(2, ('chk_index', 'chk_bytes'))
358
359
# Shouldn't we start_write_group around this?
360
if self._new_pack is not None:
361
raise errors.BzrError('call to %s.pack() while another pack is'
362
' being written.'
363
% (self.__class__.__name__,))
364
new_pack = self.pack_factory(self, '.autopack',
365
file_mode=self.repo.bzrdir._get_file_mode())
366
new_pack.set_write_cache_size(1024*1024)
367
# TODO: A better alternative is to probably use Packer.open_pack(), and
368
# then create a GroupCompressVersionedFiles() around the
369
# target pack to insert into.
370
pb = ui.ui_factory.nested_progress_bar()
371
try:
372
for idx, (index_name, vf_name) in enumerate(to_copy):
373
pb.update('repacking %s' % (vf_name,), idx + 1, len(to_copy))
374
keys = set()
375
new_index = getattr(new_pack, index_name)
376
new_index.set_optimize(for_size=True)
377
for pack in packs:
378
source_index = getattr(pack, index_name)
379
keys.update(e[1] for e in source_index.iter_all_entries())
380
trace.mutter('repacking %s with %d keys',
381
vf_name, len(keys))
382
source_vf = getattr(self.repo, vf_name)
383
target_access = knit._DirectPackAccess({})
384
target_access.set_writer(new_pack._writer, new_index,
385
new_pack.access_tuple())
386
target_vf = GroupCompressVersionedFiles(
387
_GCGraphIndex(new_index,
388
add_callback=new_index.add_nodes,
389
parents=source_vf._index._parents,
390
is_locked=self.repo.is_locked),
391
access=target_access,
392
delta=source_vf._delta)
393
stream = None
394
child_pb = ui.ui_factory.nested_progress_bar()
395
try:
396
if has_chk:
397
if vf_name == 'inventories':
398
stream, id_roots, p_id_roots = self._get_filtered_inv_stream(
399
source_vf, keys, pb=child_pb)
400
elif vf_name == 'chk_bytes':
401
for stream in self._get_chk_stream(source_vf, keys,
402
id_roots, p_id_roots,
403
pb=child_pb):
404
target_vf.insert_record_stream(stream)
405
# No more to copy
406
stream = []
407
if stream is None:
408
def pb_stream():
409
substream = source_vf.get_record_stream(keys, 'gc-optimal', True)
410
for idx, record in enumerate(substream):
411
child_pb.update(vf_name, idx + 1, len(keys))
412
yield record
413
stream = pb_stream()
414
target_vf.insert_record_stream(stream)
415
finally:
416
child_pb.finished()
417
new_pack._check_references() # shouldn't be needed
418
except:
419
pb.finished()
420
new_pack.abort()
421
raise
422
else:
423
pb.finished()
424
if not new_pack.data_inserted():
425
raise AssertionError('We copied from pack files,'
426
' but had no data copied')
427
# we need to abort somehow, because we don't want to remove
428
# the other packs
429
new_pack.finish()
430
self.allocate(new_pack)
431
for pack in packs:
432
self._remove_pack_from_memory(pack)
433
# record the newly available packs and stop advertising the old
434
# packs
435
self._save_pack_names(clear_obsolete_packs=True)
436
# Move the old packs out of the way now they are no longer referenced.
437
for revision_count, packs in pack_operations:
438
self._obsolete_packs(packs)
439
440
441
442
class GCPackRepository(KnitPackRepository):
443
"""GC customisation of KnitPackRepository."""
444
445
# Note: I think the CHK support can be dropped from this class as it's
446
# implemented via the GCCHKPackRepository class defined next. IGC 20090301
447
448
def __init__(self, _format, a_bzrdir, control_files, _commit_builder_class,
449
_serializer):
450
"""Overridden to change pack collection class."""
451
KnitPackRepository.__init__(self, _format, a_bzrdir, control_files,
452
_commit_builder_class, _serializer)
453
# and now replace everything it did :)
454
index_transport = self._transport.clone('indices')
455
if chk_support:
456
self._pack_collection = GCRepositoryPackCollection(self,
457
self._transport, index_transport,
458
self._transport.clone('upload'),
459
self._transport.clone('packs'),
460
_format.index_builder_class,
461
_format.index_class,
462
use_chk_index=self._format.supports_chks,
463
)
464
else:
465
self._pack_collection = GCRepositoryPackCollection(self,
466
self._transport, index_transport,
467
self._transport.clone('upload'),
468
self._transport.clone('packs'),
469
_format.index_builder_class,
470
_format.index_class)
471
self.inventories = GroupCompressVersionedFiles(
472
_GCGraphIndex(self._pack_collection.inventory_index.combined_index,
473
add_callback=self._pack_collection.inventory_index.add_callback,
474
parents=True, is_locked=self.is_locked),
475
access=self._pack_collection.inventory_index.data_access)
476
self.revisions = GroupCompressVersionedFiles(
477
_GCGraphIndex(self._pack_collection.revision_index.combined_index,
478
add_callback=self._pack_collection.revision_index.add_callback,
479
parents=True, is_locked=self.is_locked),
480
access=self._pack_collection.revision_index.data_access,
481
delta=False)
482
self.signatures = GroupCompressVersionedFiles(
483
_GCGraphIndex(self._pack_collection.signature_index.combined_index,
484
add_callback=self._pack_collection.signature_index.add_callback,
485
parents=False, is_locked=self.is_locked),
486
access=self._pack_collection.signature_index.data_access,
487
delta=False)
488
self.texts = GroupCompressVersionedFiles(
489
_GCGraphIndex(self._pack_collection.text_index.combined_index,
490
add_callback=self._pack_collection.text_index.add_callback,
491
parents=True, is_locked=self.is_locked),
492
access=self._pack_collection.text_index.data_access)
493
if chk_support and _format.supports_chks:
494
# No graph, no compression:- references from chks are between
495
# different objects not temporal versions of the same; and without
496
# some sort of temporal structure knit compression will just fail.
497
self.chk_bytes = GroupCompressVersionedFiles(
498
_GCGraphIndex(self._pack_collection.chk_index.combined_index,
499
add_callback=self._pack_collection.chk_index.add_callback,
500
parents=False, is_locked=self.is_locked),
501
access=self._pack_collection.chk_index.data_access)
502
else:
503
self.chk_bytes = None
504
# True when the repository object is 'write locked' (as opposed to the
505
# physical lock only taken out around changes to the pack-names list.)
506
# Another way to represent this would be a decorator around the control
507
# files object that presents logical locks as physical ones - if this
508
# gets ugly consider that alternative design. RBC 20071011
509
self._write_lock_count = 0
510
self._transaction = None
511
# for tests
512
self._reconcile_does_inventory_gc = True
513
self._reconcile_fixes_text_parents = True
514
self._reconcile_backsup_inventory = False
515
516
517
if chk_support:
518
class GCCHKPackRepository(CHKInventoryRepository):
519
"""GC customisation of CHKInventoryRepository."""
520
521
def __init__(self, _format, a_bzrdir, control_files, _commit_builder_class,
522
_serializer):
523
"""Overridden to change pack collection class."""
524
KnitPackRepository.__init__(self, _format, a_bzrdir, control_files,
525
_commit_builder_class, _serializer)
526
# and now replace everything it did :)
527
index_transport = self._transport.clone('indices')
528
self._pack_collection = GCRepositoryPackCollection(self,
529
self._transport, index_transport,
530
self._transport.clone('upload'),
531
self._transport.clone('packs'),
532
_format.index_builder_class,
533
_format.index_class,
534
use_chk_index=self._format.supports_chks,
535
)
536
self.inventories = GroupCompressVersionedFiles(
537
_GCGraphIndex(self._pack_collection.inventory_index.combined_index,
538
add_callback=self._pack_collection.inventory_index.add_callback,
539
parents=True, is_locked=self.is_locked),
540
access=self._pack_collection.inventory_index.data_access)
541
self.revisions = GroupCompressVersionedFiles(
542
_GCGraphIndex(self._pack_collection.revision_index.combined_index,
543
add_callback=self._pack_collection.revision_index.add_callback,
544
parents=True, is_locked=self.is_locked),
545
access=self._pack_collection.revision_index.data_access,
546
delta=False)
547
self.signatures = GroupCompressVersionedFiles(
548
_GCGraphIndex(self._pack_collection.signature_index.combined_index,
549
add_callback=self._pack_collection.signature_index.add_callback,
550
parents=False, is_locked=self.is_locked),
551
access=self._pack_collection.signature_index.data_access,
552
delta=False)
553
self.texts = GroupCompressVersionedFiles(
554
_GCGraphIndex(self._pack_collection.text_index.combined_index,
555
add_callback=self._pack_collection.text_index.add_callback,
556
parents=True, is_locked=self.is_locked),
557
access=self._pack_collection.text_index.data_access)
558
assert _format.supports_chks
559
# No parents, individual CHK pages don't have specific ancestry
560
self.chk_bytes = GroupCompressVersionedFiles(
561
_GCGraphIndex(self._pack_collection.chk_index.combined_index,
562
add_callback=self._pack_collection.chk_index.add_callback,
563
parents=False, is_locked=self.is_locked),
564
access=self._pack_collection.chk_index.data_access)
565
# True when the repository object is 'write locked' (as opposed to the
566
# physical lock only taken out around changes to the pack-names list.)
567
# Another way to represent this would be a decorator around the control
568
# files object that presents logical locks as physical ones - if this
569
# gets ugly consider that alternative design. RBC 20071011
570
self._write_lock_count = 0
571
self._transaction = None
572
# for tests
573
self._reconcile_does_inventory_gc = True
574
self._reconcile_fixes_text_parents = True
575
self._reconcile_backsup_inventory = False
576
577
578
class RepositoryFormatPackGCPlain(RepositoryFormatKnitPack6):
579
"""A B+Tree index using pack repository."""
580
581
repository_class = GCPackRepository
582
rich_root_data = False
583
# Note: We cannot unpack a delta that references a text we haven't
584
# seen yet. There are 2 options, work in fulltexts, or require
585
# topological sorting. Using fulltexts is more optimal for local
586
# operations, because the source can be smart about extracting
587
# multiple in-a-row (and sharing strings). Topological is better
588
# for remote, because we access less data.
589
_fetch_order = 'unordered'
590
_fetch_gc_optimal = True
591
_fetch_uses_deltas = False
592
593
def get_format_string(self):
594
"""See RepositoryFormat.get_format_string()."""
595
return ("Bazaar development format - btree+gc "
596
"(needs bzr.dev from 1.13)\n")
597
598
def get_format_description(self):
599
"""See RepositoryFormat.get_format_description()."""
600
return ("Development repository format - btree+groupcompress "
601
", interoperates with pack-0.92\n")
602
603
604
if chk_support:
605
from bzrlib import chk_serializer
606
class RepositoryFormatPackGCCHK16(RepositoryFormatPackDevelopment5Hash16):
607
"""A hashed CHK+group compress pack repository."""
608
609
repository_class = GCCHKPackRepository
610
rich_root_data = True
611
# Note: We cannot unpack a delta that references a text we haven't
612
# seen yet. There are 2 options, work in fulltexts, or require
613
# topological sorting. Using fulltexts is more optimal for local
614
# operations, because the source can be smart about extracting
615
# multiple in-a-row (and sharing strings). Topological is better
616
# for remote, because we access less data.
617
_fetch_order = 'unordered'
618
_fetch_gc_optimal = True
619
_fetch_uses_deltas = False
620
621
def get_format_string(self):
622
"""See RepositoryFormat.get_format_string()."""
623
return ('Bazaar development format - hash16chk+gc rich-root'
624
' (needs bzr.dev from 1.13)\n')
625
626
def get_format_description(self):
627
"""See RepositoryFormat.get_format_description()."""
628
return ("Development repository format - hash16chk+groupcompress")
629
630
631
class RepositoryFormatPackGCCHK255(RepositoryFormatPackDevelopment5Hash255):
632
"""A hashed CHK+group compress pack repository."""
633
634
repository_class = GCCHKPackRepository
635
# Setting this to True causes us to use InterModel1And2, so for now set
636
# it to False which uses InterDifferingSerializer. When IM1&2 is
637
# removed (as it is in bzr.dev) we can set this back to True.
638
rich_root_data = True
639
640
def get_format_string(self):
641
"""See RepositoryFormat.get_format_string()."""
642
return ('Bazaar development format - hash255chk+gc rich-root'
643
' (needs bzr.dev from 1.13)\n')
644
645
def get_format_description(self):
646
"""See RepositoryFormat.get_format_description()."""
647
return ("Development repository format - hash255chk+groupcompress")
648
649
650
chk_serializer_255_bigpage = chk_serializer.CHKSerializer(65536, 'hash-255-way')
651
class RepositoryFormatPackGCCHK255Big(RepositoryFormatPackGCCHK255):
652
"""A hashed CHK+group compress pack repository."""
653
654
repository_class = GCCHKPackRepository
655
# For right now, setting this to True gives us InterModel1And2 rather
656
# than InterDifferingSerializer
657
rich_root_data = True
658
_serializer = chk_serializer_255_bigpage
659
# Note: We cannot unpack a delta that references a text we haven't
660
# seen yet. There are 2 options, work in fulltexts, or require
661
# topological sorting. Using fulltexts is more optimal for local
662
# operations, because the source can be smart about extracting
663
# multiple in-a-row (and sharing strings). Topological is better
664
# for remote, because we access less data.
665
_fetch_order = 'unordered'
666
_fetch_gc_optimal = True
667
_fetch_uses_deltas = False
668
669
def get_format_string(self):
670
"""See RepositoryFormat.get_format_string()."""
671
return ('Bazaar development format - hash255chk+gc rich-root bigpage'
672
' (needs bzr.dev from 1.13)\n')
673
674
def get_format_description(self):
675
"""See RepositoryFormat.get_format_description()."""
676
return ("Development repository format - hash255chk+groupcompress + bigpage")
677
678
679
def pack_incompatible(source, target, orig_method=InterPackRepo.is_compatible):
680
"""Be incompatible with the regular fetch code."""
681
formats = (RepositoryFormatPackGCPlain,)
682
if chk_support:
683
formats = formats + (RepositoryFormatPackGCCHK16,
684
RepositoryFormatPackGCCHK255,
685
RepositoryFormatPackGCCHK255Big)
686
if isinstance(source._format, formats) or isinstance(target._format, formats):
687
return False
688
else:
689
return orig_method(source, target)
690
691
692
InterPackRepo.is_compatible = staticmethod(pack_incompatible)
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