- 28 Oct, 2021 9 commits
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Kirill Smelkov authored
Lacking generics we have set.go.in and instantiation for Set[int64], set[string], Set[Oid] and Set[Tid] - that will be used in follow-up patches. The set.go.in itself is mostly a generalized copy from git-backup: https://lab.nexedi.com/kirr/git-backup/blob/c9db60e8/set.go
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Kirill Smelkov authored
treegen.go and treegen.py together provide a way - to commit a particular BTree topology into ZODB, and - to generate set of random tree topologies that all correspond to particular {k->v} dict. this will be used in upcoming ΔBtail and ΔFtail tests. See treegen.py documentation for details. Some preliminary history: 9eca74ec X Teach AllStructs to emit topologies with values 1b962f03 X Restructure: found bug that it was not marking objects as modified 2139af2c X treegen: Verify that tree actually saved to storage is what was requested b5e39d4a X wcfs/treegen: allstructs: Do not keep all tree structures in memory e9c4b619 X rebuild: tests: Random testing c32055fc X wcfs/xbtree: ΔBtail tests += ø -> Tree; Tree -> ø 4300d88a X wcfs/xbtreetest/treegen.py: Fix it on ZODB4
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Kirill Smelkov authored
This will be the place to keep BTree-related utilities. For now it provides only type aliases since Go lacks generics.
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Kirill Smelkov authored
To handle invalidations, WCFS will need to detect changes to both ZBlk objects and to ZBigFile.blktab BTree that is mapping file blocks to ZBlk objects. And with BTree detecting changes is much more complex, because when a BTree changes, it might be rebalanced, or keys migrated from one tree/bucket node to another tree/bucket node. In other words a BTree change might be not only a change to a {}key->value dictionary, but also a change to BTree topology. Because there are many BTree topologies that correspond to the same {}key->value state, a change from kv₁ to kv₂, even if kv₁ and kv₂ are close to each other, might be accompanied by a dramatic change to topology of the tree. This creates a need for thoroughly testing the BTree difference algorithm because many of BTree topologies changes are tricky, and if a simple algorithm works on relatively stable topology updates, it does not necessarily mean that that same algorithm will continue to work correctly in the general case. So, as a preparatory step, here comes xbtree.py package, that can be used to inspect tree topologies, to create trees with specified topology and to manipulate topology of an existing tree. This package will be used in tests for upcoming ΔBtail. For debugging, and also since those tests will involve both Go and Python parts, it creates the need to be able to specify and exchange topology of a tree via compact string. This package also defines so called "topology encoding" to do so. Some preliminar history: fb56193f X fix metric to keep Z <- N order stable over key^ 809304d1 X "B:" indicates ø bucket with k&b, "B" - ø bucket with only keys 9eca74ec X Teach AllStructs to emit topologies with values 1b962f03 X Restructure: found bug that it was not marking objects as modified 9181c5d9 X Restructure; verify that it marks as changed only modifed nodes e9902c4a X improve `xbtree topoview` For the reference xbtree.py package documentation is quoted below. ---- 8< ---- Package xbtree provides utilities for inspecting/manipulating internal structure of integer-keyed BTrees. It will be primarily used to help verify ΔBTail in WCFS. - `Tree` represents a tree node. - `Bucket` represents a bucket node. - `StructureOf` returns internal structure of ZODB BTree represented as Tree and Bucket nodes. - `Restructure` reorganizes ZODB BTree instance according to specified topology structure. - `AllStructs` generates all possible BTree topology structures with given keys. Topology encoding ----------------- Topology encoding provides way to represent structure of a Tree as path-like string. TopoEncode converts Tree into its topology-encoded representation, while TopoDecode decodes topology-encoded string back into Tree. The following example illustrates topology encoding represented by string "T3/T-T/B1-T5/B-B7,8,9": [ 3 ] T3/ represents Tree([3]) / \ [ ] [ ] T-T/ represents two empty Tree([]) ↓ ↓ |1|[ 5 ] B1-T5/ represent Bucket([1]) and Tree([5]) / \ || |7|8|9| B-B7,8,9 represents empty Bucket([]) and Bucket([7,8,9]) Topology encoding specification: A Tree is encoded by level-order traversal, delimiting layers with "/". Inside a layer Tree and Bucket nodes are signalled as "T<keys>" ; Tree "B<keys>" ; Bucket with only keys "B<keys+values>" ; Bucket with keys and values Keys are represented as ","-delimited list of integers. For example Tree or Bucket with [1,3,5] keys are represented as "T1,3,5" ; Tree([1,3,5]) "B1,3,5" ; Bucket([1,3,5]) Keys+values are represented as ","-delimited list of "<key>:<value>" pairs. For example Bucket corresponding to {1:1, 2:4, 3:9} is represented as "B1:1,2:4,3:9" ; Bucket([1,2,3], [1,4,9]) Empty keys+values are represented as ":" - an empty Bucket for key->value mapping is represented as "B:" ; Bucket([], []) Nodes inside one layer are delimited with "-". For example a layer consisting of an empty Tree, a Tree with [1,3] keys, and Bucket with [4,5] keys is represented as "T-T1,3-B4,5" ; layer with Tree([]), Tree([1,3]) and Bucket([4,5]) A layer consists of nodes that are followed by node-node links from upper layer in left-to-right order. Visualization ------------- The following visualization utilities are provided to help understand BTrees better: - `topoview` displays BTree structure given its topology-encoded representation. - `Tree.graphviz` returns Tree graph representation in dot language.
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Kirill Smelkov authored
For WCFS to be efficient it will have to carefully preserve OS cache on file invalidations. As preparatory step establish infrastructure for verifying state of OS file cache and start asserting on OS cache state in a couple of places. See comments added to tFile constructor that describe how OS cache state verification is setup. Some preliminary history: kirr/wendelin.core@8293025b X Thoughts on how to avoid readahead touching pages of neighbour block kirr/wendelin.core@3054e4a3 X not touching neighbour block works via setting MADV_RANDOM in last 1/4 of every block kirr/wendelin.core@18362227 X #5 access still triggers read to #4 ? kirr/wendelin.core@17dbf94e X Provide mlock2 fallback for Ubuntu kirr/wendelin.core@d134c0b9 X wcfs: test: try to live with only hard memlock limit adjusted kirr/wendelin.core@c2423296 X Fix mlock2 build on Debian 8
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Kirill Smelkov authored
Provide filesystem view of in-ZODB ZBigFiles, but do not implement support for invalidations nor isolation protocol yet. In particular, because ZODB invalidations are not yet handled, the filesystem does not update its data in accordance with ZODB updates, and instead provides stale data view that corresponds to the state of ZODB at the time when wcfs was mounted. The main parts of this patch are: - wcfs/wcfs.go is filesystem implementation itself together with overview. - wcfs/__init__.py is python wrapper to spawn and interoperate with that filesystem. - wcfs/wcfs_test.py is tests. Some preliminary history: kirr/wendelin.core@fe7efb94 X start of wcfs kirr/wendelin.core@878b2787 X draft loading kirr/wendelin.core@d58c71e8 X don't overalign end by 1 blksize if end is already aligned kirr/wendelin.core@29c9f13d X readBlk: Fix thinko in already case kirr/wendelin.core@59552328 X wcfs: Care to disable OS polling on us kirr/wendelin.core@c00d94c7 X workaround lack of exception chaining on Python2 with xdefer kirr/wendelin.core@0398e23d X bytearray turned out to be copying data kirr/wendelin.core@7a837040 X print wcfs.py py-level traceback on SIGBUS (e.g. wcfs.go aborting due to bug/panic) kirr/wendelin.core@661b871f X make sure tests don't get stuck even if wcfs gets killed -9 ... kirr/wendelin.core@2c043d29 X More effort to unmount failed wcfs.go kirr/wendelin.core@1ccc4478 X Use `with gil` + regular py code instead of PyGILState_Ensure/PyGILState_Release/PyRun_SimpleString kirr/wendelin.core@5dc9c791 X wcfs: Kill xdefer kirr/wendelin.core@91e9eba8 X wcfs: test: Register tFile to tDB early kirr/wendelin.core@a7138fef X wcfs: mkdir /tmp/wcfs with sticky bit kirr/wendelin.core@1eec76d0 X wcfs: try to set sticky for /tmp/wcfs even if the directory already exists kirr/wendelin.core@c2c35851 X wcfs: tests: Factor-out waiting for a general condition to become true into waitfor kirr/wendelin.core@78f36993 X wcfs: test: Fix thinko in getting /sys/fs/fuse/connection/<X> for wcfs kirr/wendelin.core@bc9eb16f X wcfs: tests: Don't use testmntpt everywhere kirr/wendelin.core@6dec74e7 X wcfs: tests: Split tDB into -> tDB + tWCFS kirr/wendelin.core@3a6bd764 X wcfs: tests: Run `fusermount -u` the second time if we had to kill wcfs kirr/wendelin.core@112720f3 X wcfs: tests: Print which files are still opened on wcfs if `fusermount -u` fails kirr/wendelin.core@bb40185b X wcfs: Take $WENDELIN_CORE_WCFS_OPTIONS into account not only from under join kirr/wendelin.core@03a9ef33 X wcfs: Remove credentials from zurl when computing wcfs mountpoint kirr/wendelin.core@68ee5bdc X wcfs: lsof tweaks kirr/wendelin.core@21671879 X wcfs: Teach entrypoint frontend to handle subcommands: serve, status, stop kirr/wendelin.core@b0642b80 X wcfs: Switch mountpoints from /tmp/wcfs/* to /dev/shm/* kirr/wendelin.core@b0ca031f X wcfs: Teach join/serve to start successfully even after unclean wcfs shutdown kirr/wendelin.core@5bfa8cf8 X wcfs: Add start to spawn a Server that can be later stopped (draft) kirr/wendelin.core@5fcec261 X wcfs: Run fusermount and friends with /bin:/usr/bin always on path kirr/wendelin.core@669d7a20 fixup! X wcfs: Run fusermount and friends with /bin:/usr/bin always on path kirr/wendelin.core@6b22f8c4 X wcfs: Teach start to start successfully even after unclean wcfs shutdown kirr/wendelin.core@15389db0 X wcfs: Tune _fuse_unmount to include `fusermount -u` error message into raised exception kirr/wendelin.core@153c002a X wcfs: _fuse_unmount: Try first `kill -TERM` before `kill -QUIT` wcfs kirr/wendelin.core@3244f3a6 X wcfs: lsof +D misbehaves - don't use it kirr/wendelin.core@a126e709 X wcfs: Put client log into its own logger kirr/wendelin.core@ac303d1e X wcfs: tests: -v -> show only wcfs.py logs verbosely kirr/wendelin.core@d671a9e9 X wcfs: Give more time to stop wcfs server
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Kirill Smelkov authored
Add functionality to load objects from ZODB as saved by py wendelin.core. Mostly straightforward code. The main part is in zblk.go . Contrary to python implementation, go can load ZBlk1's subobjects in parallel, which, given scalable ZODB storage, can be significantly faster compared to serially loading all ZData subobjects as py code does. TODO test wrt data saved by Python3. Some preliminary history: kirr/wendelin.core@878b2787 X draft loading kirr/wendelin.core@bf9a7405 X No longer rely on ZODB cache invariant for invalidations kirr/wendelin.core@0d62b05e X Adjust to btree.VGet & friends signature change to include keycov in visit callback kirr/wendelin.core@b74dda09 X Start switching Track from Track(key) to Track(keycov)
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Kirill Smelkov authored
Add initial stub for WCFS program and tests. WCFS functionality will be added step-by-step in follow-up commits. Some preliminary history: kirr/wendelin.core@0ae88a32 X .nxdtest: Verify Go bits with GOMAXPROCS=1,2,`nproc` kirr/wendelin.core@23528eb4 X wcfs: make it to use go modules for dependencies
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Kirill Smelkov authored
In 6637d216 (lib/zodb: Add zstor_2zurl - way to convert a ZODB storage into URL to access it) we added zstor_2zurl function to convert a ZODB storage client object into an URL to access the storage. At that time the function knew how to understand FileStorage only. Let's add support for other storages that WCFS will need to support now. NEO URI scheme matches the one currently used on ZODB/go side. It semantically needs nexedi/neoppod!18 to be also applied to NEO/py side, but we do not care for now that that patch is not merged (yet, or forever) because extracted ZURL is used only with WCFS which uses NEO/go. NEO support also depends on custom patch to remember SSL credentials on NEO Client: neo@a2f192cb Some preliminary history: 5cb39463 fixup! X wcfs/zeo started to work locally 1cf3b228 X zstor_2zurl += NEO 7f8fa32a X lib/zodb: zstor_2zurl += NEO/SSL support e26524df X wcfs, lib/zodb: DemoStorage support
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- 25 Oct, 2021 8 commits
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Kirill Smelkov authored
Upcoming libwcfs (C++ part of WCFS client) will need to use virtmem code and link to libvirtmem.
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Kirill Smelkov authored
Manaully, because there is no automatic dependency tracking in setuptools... Dependency tracking is needed to avoid miscompilation after incremental update under SlapOS/buildout/testnode/... when e.g. only .h was changed.
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Kirill Smelkov authored
This is similar to e870781d (Top-level in-tree import redirector) but for upcoming pyx modules.
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Kirill Smelkov authored
Soon we are going to split virtmem code into its own DSO to which bigfile extension will link. As plain setuptools does not support such dynamic linking, we are going to use setuptools_dso instead. But more: some of our upcoming extensions and DSOs will need to use Cython and C++ parts of Pygolang. Prepare that and use Extensions and DSO from golang.pyx.build to support that right from the start.
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Kirill Smelkov authored
Currently we have only one extension wendelin.bigfile._bigfile, but we are going to add more both python extensions and non-python DSOs. Start preparing to that by factoring-out common code.
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Kirill Smelkov authored
lib/tests/testprog/zloadrace.py:90:1 'ZODB.FileStorage.FileStorage' imported but unused This amends commit c37a989d.
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Kirill Smelkov authored
Do what we can do without gdb and then tail to regular segmentation fault. With core file gdb can still be used, but it is handy if we already can get traceback of the crash into the log automatically. TODO better use https://github.com/ianlancetaylor/libbacktrace because backtrace_symbols often does not provide symbolic information. We do not do this now because libbacktrace is not always automatically installed.
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Kirill Smelkov authored
This makes sure that those programs are always built afresh instead being stuck at outdated build. This is needed because corresponding test .c file includes many other .c files and we don't implement dependency tracking.
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- 01 Apr, 2021 3 commits
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Kirill Smelkov authored
Else, e.g. after a failing test, that closed its storage and DB, but not all Connections, another test, just by starting new transaction, would invoke synchronization on that unclosed connection, which will try to access closed storage and likely fail. Fixes e.g. https://nexedijs.erp5.net/#/test_result_module/20210401-31B27B3D/5 Crash scenariou is the same as described in 5a5ed2c7 (tests: Force-close ZODB connections in teardown, that testing code forgot to explicitly close). Only now we try to isolate tests from each other not only for different modules, but also for tests inside the same module.
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Kirill Smelkov authored
The tests verify that there is no concurrency bugs around load, Connection.open and invalidations. See e.g. https://github.com/zopefoundation/ZODB/issues/290 https://github.com/zopefoundation/ZEO/issues/155 By including the tests into wendelin.core, we will have CI coverage for all supported storages (FileStorage, ZEO, NEO), and for all supported ZODB (currently ZODB4, ZODB4-wc2 and ZODB5). ZEO5 is know to currently fail zloadrace. However, even though ZODB#290 was fixed, ZEO5 turned out to also fail on zopenrace: def test_zodb_zopenrace(): # exercises ZODB.Connection + particular storage implementation > zopenrace.main() lib/tests/test_zodb.py:382: _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ <decorator-gen-1>:2: in main ??? ../../tools/go/pygolang/golang/__init__.py:103: in _ return f(*argv, **kw) lib/tests/testprog/zopenrace.py:115: in main test(zstor) <decorator-gen-2>:2: in test ??? ../../tools/go/pygolang/golang/__init__.py:103: in _ return f(*argv, **kw) lib/tests/testprog/zopenrace.py:201: in test wg.wait() golang/_sync.pyx:246: in golang._sync.PyWorkGroup.wait ??? golang/_sync.pyx:226: in golang._sync.PyWorkGroup.go.pyrunf ??? lib/tests/testprog/zopenrace.py:165: in T1 t1() _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ def t1(): transaction.begin() zconn = db.open() root = zconn.root() obj1 = root['obj1'] obj2 = root['obj2'] # obj1 - reload it from zstor # obj2 - get it from zconn cache obj1._p_invalidate() # both objects must have the same values i1 = obj1.i i2 = obj2.i if i1 != i2: > raise AssertionError("T1: obj1.i (%d) != obj2.i (%d)" % (i1, i2)) E AssertionError: T1: obj1.i (3) != obj2.i (2) lib/tests/testprog/zopenrace.py:156: AssertionError
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Kirill Smelkov authored
Previously if an assert or something failed in spawned thread, the main thread was usually spinning indefinitely = tests hang. -> Switch all threading places to use sync.WorkGroup and this way if a thread fails, all other threads are canceled and the exception is reported back to wg.wait in main thread. Since we start to go this route, NotifyChannel is reworked to fully use channels instead of busy-waiting.
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- 26 Mar, 2021 1 commit
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Kirill Smelkov authored
setuptools_dso 2 started to emit those autogenerated files. See https://github.com/mdavidsaver/setuptools_dso/pull/15 for details.
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- 08 Mar, 2021 3 commits
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Kirill Smelkov authored
NEO 1.9 was released in 2018 and is outdated by now. NEO 1.12 is currently the latest NEO release.
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Kirill Smelkov authored
After switching to ZODB >= 4 in the previous commit, we can safely require zodbtools, because there is now no conflict in between ZODB3/ZODB eggs.
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Kirill Smelkov authored
It's been a while since last ZODB3 3.10.7 release in 2016 and the last commit in upstream ZODB3 repository (3.10 branch) is from 2017. The world switched since then to ZODB4 and to ZODB5 after that. We were still requiring ZODB3, because ZODB3 3.11 egg was just a dependency on newer ZODB, ZEO, BTrees and persistent; and this way we could be supporting all ZODB3.10.x and ZODB4 and ZODB5 via ZODB3.11. However upcoming Wendelin.core 2, for its proper working, needs MVCC semantic as implemented in ZODB5. This forces us, even for ZODB4, to backport non-trivial bits from ZODB5 (see [1]). Maintaining ZODB3 support at this point becomes non-practical, because, to our knowledge, there is no wendelin.core user that plans to continue using ZODB3 without switching to at least ZODB4 in the near future. So goodbye ZODB3. Even though ZODB still stays with us, it gives a feeling similar to [2], because in 2014, when I was myself learning ZODB, it was through ZODB3 - still at the time when all ZODB bits were living together in one place. [1] nexedi/ZODB!1 [2] https://lists.osuosl.org/pipermail/darcs-users/2008-September/014095.html
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- 11 Dec, 2020 1 commit
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Kirill Smelkov authored
DB.close() does `del self.storage`. https://github.com/zopefoundation/ZODB/blob/5.6.0-14-g0eae10cd0/src/ZODB/DB.py#L646 This way if DB was closed, but some conn(s) were not, it will crash in teardown as e.g. below: _____________ ERROR at teardown of test_bigfile_zblk1_zdata_reuse ______________ def teardown_module(): > testdb.teardown() bigfile/tests/test_filezodb.py:58: _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ self = <wendelin.lib.testing.TestDB_ZEO object at 0x7fb9c0216350> def teardown(self): # close connections that test code forgot to close for connref, tb in self.connv: conn = connref() if conn is None: continue if not conn.opened: continue # still alive, but closed print("W: testdb: teardown: %s left not closed by test code" "; opened by:\n%s" % (conn, tb), file=sys.stderr) db = conn.db() > stor = db.storage E AttributeError: 'DB' object has no attribute 'storage' lib/testing.py:217: AttributeError The fix is simple - don't use db.storage at all, because it is not actually used in that code.
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- 17 Nov, 2020 2 commits
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Kirill Smelkov authored
Since ZBigFile keeps references to fileh objects that are created through it it forms a file <=> fileh cycle that is not collected without cyclic GC: https://lab.nexedi.com/nexedi/wendelin.core/blob/v0.13-52-ga702d41/bigfile/file_zodb.py#L497 https://lab.nexedi.com/nexedi/wendelin.core/blob/v0.13-52-ga702d41/bigfile/file_zodb.py#L566-571 We did not noticed this leak until now because it is small, but with upcoming wendelin.core 2 it is important to release a fileh, because there is WCFS connection associated with fileh, and if fileh is not released, that connection also stays alive, keeping on-WCFS resources still being used, and preventing WCFS from being unmounted cleanly. -> Add cyclic GC support to PyBigFile / PyBigFileH NOTE: we still don't allow PyVMA <=> PyBigFileH cycles to be collected, because fileh_close called from fileh.__del__ asserts that there are no live mappings left. See added comments for details. There is no known practical need to use such cycles, so this should be ok. See also other patches on cyclic GC topic: - 450ad804 (bigarray: ArrayRef support for BigArray) // adds cyclic GC support for PyVMA - d97641d2 (bigfile/py: Properly untrack PyVMA from GC before dealloc) /proposed-for-review-on !12
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Kirill Smelkov authored
The logic in pyvma_traverse and pyvma_clear needs to be synchronized with PyVMA deallocation. In the next patche we'll be amending this logic, and it will help a reader to keep all those functions together. For the reference: PyVMA support for cyclic GC was introduced in 450ad804 (bigarray: ArrayRef support for BigArray). See also d97641d2 (bigfile/py: Properly untrack PyVMA from GC before dealloc). /proposed-for-review-on nexedi/wendelin.core!12
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- 03 Nov, 2020 2 commits
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Kirill Smelkov authored
Otherwise when /bin/sh is dash it fails with t/tfault-run: 35: test: on_pagefault: unexpected operator
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Kirill Smelkov authored
Otherwise, if previous test.fault failed, tfault-run fails to start, e.g. >>> test.fault $ make test.fault # MAKEFLAGS=-j1 x86_64-linux-gnu-gcc -pthread -g -Wall -D_GNU_SOURCE -std=gnu99 -fplan9-extensions -Wno-declaration-after-statement -Wno-error=declaration-after-statement -Iinclude -I3rdparty/ccan -I3rdparty/include bigfile/tests/tfault.c lib/bug.c lib/utils.c 3rdparty/ccan/ccan/tap/tap.c -o bigfile/tests/tfault.t t/tfault-run bigfile/tests/tfault.t faultr on_pagefault mkdir: cannot create directory ‘t/tfault-run.faultr’: File exists Makefile:186: recipe for target 'faultr.tfault' failed make: *** [faultr.tfault] Error 1 rm bigfile/tests/tfault.t error test.fault 0.433s # 1t 1e 0f 0s
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- 02 Nov, 2020 1 commit
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Kirill Smelkov authored
Nxdtest[1] is tox-like tool to run tests under Nexedi testing infrastructure. See [2] for details. [1] https://lab.nexedi.com/nexedi/nxdtest [2] nexedi/slapos!839
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- 11 Sep, 2020 1 commit
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Kirill Smelkov authored
We need the following patch of mine: http://git.ozlabs.org/?p=ccan;a=commitdiff;h=b97c7f0841f5173a07a2571f2c99f944d8405a90
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- 17 May, 2020 2 commits
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Kirill Smelkov authored
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Kirill Smelkov authored
It is hard for people to understand current wording, so let's expand zconn_at description to additionally explain what it is providing with second set of words, which, hopefully, lowers potential ambiguity a bit. /reported-by @jwolf083
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- 17 Apr, 2020 1 commit
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Kirill Smelkov authored
Pygolang egg provides "golang" python package, not "pygolang". Bug introduced in 5c8340d2 (*: Use defer for dbclose & friends).
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- 15 Apr, 2020 6 commits
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Kirill Smelkov authored
In PEP517 mode setup.py is sourced - not executed - and the build fails with ImportError like this: Preparing wheel metadata ... error ERROR: Command errored out with exit status 1: command: /home/kirr/src/wendelin/venv/z-dev/bin/python2 /home/kirr/src/wendelin/venv/z-dev/local/lib/python2.7/site-packages/pip/_vendor/pep517/_in_process.py prepare_metadata_for_build_wheel /tmp/tmp2F3aEs cwd: /home/kirr/src/wendelin/wendelin.core Complete output (53 lines): running dist_info creating /tmp/pip-modern-metadata-sPiqUt/wendelin.core.egg-info writing requirements to /tmp/pip-modern-metadata-sPiqUt/wendelin.core.egg-info/requires.txt writing /tmp/pip-modern-metadata-sPiqUt/wendelin.core.egg-info/PKG-INFO writing top-level names to /tmp/pip-modern-metadata-sPiqUt/wendelin.core.egg-info/top_level.txt writing dependency_links to /tmp/pip-modern-metadata-sPiqUt/wendelin.core.egg-info/dependency_links.txt writing entry points to /tmp/pip-modern-metadata-sPiqUt/wendelin.core.egg-info/entry_points.txt writing manifest file '/tmp/pip-modern-metadata-sPiqUt/wendelin.core.egg-info/SOURCES.txt' package init file '__init__.py' not found (or not a regular file) Traceback (most recent call last): File "/home/kirr/src/wendelin/venv/z-dev/local/lib/python2.7/site-packages/pip/_vendor/pep517/_in_process.py", line 257, in <module> main() File "/home/kirr/src/wendelin/venv/z-dev/local/lib/python2.7/site-packages/pip/_vendor/pep517/_in_process.py", line 240, in main json_out['return_val'] = hook(**hook_input['kwargs']) File "/home/kirr/src/wendelin/venv/z-dev/local/lib/python2.7/site-packages/pip/_vendor/pep517/_in_process.py", line 110, in prepare_metadata_for_build_wheel return hook(metadata_directory, config_settings) File "/home/kirr/src/wendelin/venv/z-dev/local/lib/python2.7/site-packages/setuptools/build_meta.py", line 155, in prepare_metadata_for_build_wheel self.run_setup() File "/home/kirr/src/wendelin/venv/z-dev/local/lib/python2.7/site-packages/setuptools/build_meta.py", line 234, in run_setup self).run_setup(setup_script=setup_script) File "/home/kirr/src/wendelin/venv/z-dev/local/lib/python2.7/site-packages/setuptools/build_meta.py", line 141, in run_setup exec(compile(code, __file__, 'exec'), locals()) File "setup.py", line 374, in <module> """.splitlines()] File "/home/kirr/src/tools/go/pygolang/golang/pyx/build.py", line 118, in setup setuptools_dso.setup(**kw) File "/home/kirr/src/tools/py/pypa/setuptools_dso/src/setuptools_dso/__init__.py", line 37, in setup _setup(**kws) File "/home/kirr/src/wendelin/venv/z-dev/local/lib/python2.7/site-packages/setuptools/__init__.py", line 145, in setup return distutils.core.setup(**attrs) File "/usr/lib/python2.7/distutils/core.py", line 151, in setup dist.run_commands() File "/usr/lib/python2.7/distutils/dist.py", line 953, in run_commands self.run_command(cmd) File "/usr/lib/python2.7/distutils/dist.py", line 972, in run_command cmd_obj.run() File "/home/kirr/src/wendelin/venv/z-dev/local/lib/python2.7/site-packages/setuptools/command/dist_info.py", line 31, in run egg_info.run() File "/home/kirr/src/wendelin/venv/z-dev/local/lib/python2.7/site-packages/setuptools/command/egg_info.py", line 296, in run self.find_sources() File "/home/kirr/src/wendelin/venv/z-dev/local/lib/python2.7/site-packages/setuptools/command/egg_info.py", line 303, in find_sources mm.run() File "/home/kirr/src/wendelin/venv/z-dev/local/lib/python2.7/site-packages/setuptools/command/egg_info.py", line 534, in run self.add_defaults() File "/home/kirr/src/wendelin/venv/z-dev/local/lib/python2.7/site-packages/setuptools/command/egg_info.py", line 574, in add_defaults rcfiles = list(walk_revctrl()) File "/home/kirr/src/wendelin/venv/z-dev/local/lib/python2.7/site-packages/setuptools/command/sdist.py", line 20, in walk_revctrl for item in ep.load()(dirname): File "/home/kirr/src/wendelin/venv/z-dev/local/lib/python2.7/site-packages/pkg_resources/__init__.py", line 2434, in load return self.resolve() File "/home/kirr/src/wendelin/venv/z-dev/local/lib/python2.7/site-packages/pkg_resources/__init__.py", line 2444, in resolve raise ImportError(str(exc)) ImportError: 'module' object has no attribute 'git_lsfiles' See comments added to register_as_entrypoint for explanation of what happens. Wendelin.core will soon switch to PEP517 mode (by adding pyproject.toml) to build-require Cython, Pygolang and friends.
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Kirill Smelkov authored
Wendelin.core 2 will need to spawn WCFS filesystem server that accesses the same ZODB database as the program that spawns it. The database argument passed to WCFS is passed in the form of URL[1,2]. Even though zodburi provides way to convert an URL into ZODB storage instance, there is currently no way for reverse operation - to convert ZODB storage instance into URL to access it(*). So we have to build it by our own. Provide zstor_2zurl stub that currently works for FileStorage only. ZEO and NEO support is TODO. In the future we might want to move this functionality into zodbtools/py. [1] https://lab.nexedi.com/nexedi/zodbtools/blob/a2e4dd23/zodbtools/help.py#L27-53 [2] https://lab.nexedi.com/kirr/neo/blob/3d909114/go/zodb/zodbtools/help.go#L25-51 (*) contrary to ZODB/go where this functionality is provided out of the box: https://godoc.org/lab.nexedi.com/kirr/neo/go/zodb#IStorage
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Kirill Smelkov authored
Wendelin.core 2 will need to hook into when client ZODB.Connection changes its database view and readjust WCFS-level client connection accordingly. ZODB.Connection can change its view on either connection reopen, or even without reopen on start of new transaction. This patch implements ZODB.Connection.onResyncCallback for ZODB5 only. ZODB4 and ZODB3 support is TODO.
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Kirill Smelkov authored
For wendelin.core v2 we need a way to know at which particular database state application-level ZODB connection is viewing the database. Knowing that state, WCFS client library will interact with WCFS filesystem server and, in simple terms, request the server to provide data as of that particular database state. Contrary to ZODB/go[1] ZODB/py does not provide the functionality to obtain DB state of connection view, so we have to build it ourselves. Let us call the function that for a client ZODB connection returns database state corresponding to its database view as zconn_at. It is relatively easy to implement zconn_at for ZODB5, since ZODB5 adopted MVCC uniformly and this patch does just that. However even with ZODB5 currently all released ZODB5 versions have race in Connection.open() vs invalidations[2], and so the first ZODB5 release with which zconn_at implemented here will work reliable should be upcoming ZODB 5.5.2 It is TODO to implement zconn_at for ZODB4 and ZODB3, which organize things differently. Please note what would happen if zconn_at gives, even a bit, incorrect answer: wcfs client will ask wcfs server to provide array data as of different database state compared to current on-client ZODB connection. This will result in that data accessed via ZBigArray will _not_ correspond to all other data accessed via regular ZODB mechanism. It is, in other words, would be a data corruptions. [1] https://godoc.org/lab.nexedi.com/kirr/neo/go/zodb#Connection [2] https://github.com/zopefoundation/ZODB/issues/290
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Kirill Smelkov authored
This will be needed in the following patches to know how to inject zconn_at or zconn resync functionality into particular ZODB version.
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Kirill Smelkov authored
- mention in comments that _ZBigFileH not only proxies changes from virtmem -> ZODB, but also the other way: virtmem <- ZODB. - refresh comments, fix typo.
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