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When compared to plain couch document get, the use of the simplest view
functions takes around double the time, while the use of the simplest
list function can take more than 8 times:
get 100 docs:
total: 0.440337 secs
mean: 0.004403
query 100 views:
total: 0.911425 secs
mean: 0.009114
query 100 lists:
total: 3.711537 secs
mean: 0.037115
Besides that, the current implementation of sync metadata storage over
couch is dependent of timestamps of document puts, what can lead to
metadata corruption if the clock of the system is changed for any
reason.
Because of these reasons, we seek to change the implementation of
database metadata. This commit implements the storage of transaction log
data on couch documents with special ids, in the form "gen-xxxxxxxxxx",
where the x's are replaced by the generation index.
Each generation document holds a dictionary containing the generation,
doc_id and transaction_id for the changed document. For each modified
document, a generation document is inserted holding the transaction
metadata.
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- move tests to root directory
- split tests in different subdirectories
- setup a small package with common test dependencies in /testing/test_soledad
- add tox.ini that will:
- install the test_soledad package and other test dependencies
- install soledad common, client, server from the repository
- run tests contianed in /testing/tests directory using pytest
This commit also removes all oauth code from tests, as we have removed the
u1db dependency (by importing it into the repo and naming it l2db) and don't
neet oauth at all right now.
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From this moment on, we embed a fork of u1db called l2db.
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This moves the reactor time to the loopingcall period.
This is necessary as the decryption is now deferred to a thread.
The test will exit before the task is executed otherwise.
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It was breaking E126 and E202 before
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EncryptedSyncTestCase.test_sync_very_large_files is still getting an
excessive amount of memory on very slow machines (specially on old
spinning magnetic disks). This commit checks each doc at a time instead
of getting them all. More refinement is necessary for this test to pass
on any machine.
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Pep8 was warning about assignment of lambdas. These lambdas should
be partials
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For the case where the user already has data synced, this commit will
migrate the docs_received table to have the column sync_id.
That is required by the refactoring in the previous commits.
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This commit adds tests for doc ordering and encdecpool control
(start/stop). Also optimizes by deleting in batch and checking for a
sequence in memory before asking the local staging for documents.
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The constructor method of Soledad was receiving two arguments for user
id. One of them was optional with None as default. It could cause an
inconsistent state with uuid set but userid unset.
This change remove the optional user_id argument from initialization
method and return the uuid if anyone call Soledad.userid method.
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Shared db locking was used to avoid the case in which two different devices
try to store/modify remotelly stored secrets at the same time. We want to
avoid remote locks because of the problems they create, and prefer to crash
locally.
For the record, we are currently using the user's password to encrypt the
secrets stored in the server, and while we continue to do this we will have to
re-encrypt the secrets and update the remote storage whenever the user changes
her password.
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- Use dbsyncer (SQLCipherU1DBSync) instead of SQLCipherDatabase
as only the first one supports multiple threads while syncing
and is actually used by Soledad.sync
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database_security parameter was either undocumented or incomplete. This
commit adds a few more doc to make it consistent with latest changes.
Closes #7689
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All batching code has no effect by default with this commit. Since we
know that this is a dangerous new feature we will enable them only on
our test servers and check them manually before setting it as default
or adding more configuration features.
Use SyncTarget and server conf file to enable it for testing.
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Generation cache was removed for simple processing and it should not got
back, but during a batch the server wont change its generation. So a
little trick to hold that temporary information until batch finishes is
needed.
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Batch support is optional. This commit adds a 'batching' configuration
option to disable it.
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This commit adds checking for consistency on batch. When a doc is needed
during a batched sync and it doesnt exists on database, current code
will make a partial batch to avoid processing like it doesnt exist.
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Using _bulk_docs api from CouchDB we can put all docs at a single
request. Also, prefetching all ids removes the need to HEAD
requests during the batch.
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Created two methods on the backend to start and finish a batch. A dict of
callbacks is available to defer actions for the last document, allowing
temporary (changing often) metadata to be recorded only once.
Using those methods we will also be able to put all docs in one go on
the CouchDatabase implementation, but that is another step.
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On real usage the docs will arrive shuffled and pool will be reused
after many decrypts. This test asserts that everything ended up clear
between execution and no inconsistency is left over for the next run.
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This new test case will run the single insert test 5 times to ensure
that using the same pool again is fine. This is needed due failures
to shutdown the pool or inconsistency between syncs.
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This info can be changed by another syncing replica and would not
reflect real database generation. That would be ok inside of the same
sync, but can cause trouble on concurrent syncs.
The other calls are ok, since they hold info that doesnt change during
concurrent syncs or are only read/write by the replica syncing. A global
cache could fit better this removed case, but for now let's stay on the
safe side.
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The new BackendNotReadyError didn't have a status or a wire
description, because of that, when you tried to use the
leap.soledad.server package it would break trying to import
this exception (because the annotation tries to use this
variable). This was preventing soledad server from starting
at all, after this change it works again
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Current code was tested on couch 1.6 and a monkeypatch got removed
during refactor. This commit re-adds it, but in a separate module that
is intended to hold temporary code for compatibility that can be removed
on version upgrades.
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since the exception doesn't have the code and description, it breaks.
we don't need those since the couch child exception describes them.
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by subclassing the MissingDesignDocError, we don't have to import the
soledad.common.couch submodule into the soledad.client.sync
- Resolves: #7626
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Creating a database was using a unnecessary complex try/except logic.
Simplifying it should make the purpose more clear.
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When retrieving other replica info the cache wasnt being used, but when
saving it was. This commit applies caching on get as well.
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Creating a resource from a path to use get_json causes a lot of dirty
code and unexplained things like response[2]. This commit extracts that
logic into a helper to let it more clear about what is happening.
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Added tests for this token verification as it wasn't covered. Then moved
it to the new couch module that implements a couch storage.
The ServerState was chosen to hold the verify_token method.
CouchServerState holds the current implementation, which is called on
authentication middleware as the new test shows.
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errors.py was holding a few specific CouchDB errors, now moved into
couch.errors module. Also, some of CouchDatabase methods were declared
as private, but external classes needs them.
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As SoledadBackend is intended to be database agnostic, a new generic
document is now used instead of the old one made for CouchDB. The only
attribute that really relates to couch was couch_rev, removed on this
commit as it can be set on CouchDatabase implementation when needed.
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First step of splitting classes across files on common.
backend.py holds SoledadBackend (generic backend logic)
couch/ is now a directory with old code inside __init__.py and
CouchServerState on state.py
Also removed mock IndexedSoledadBackend, since Soledad does not support
indexing due to encryption on server side.
Also fixed DesignDocUnknownError to show up what is the message of the
original exception. It was being lost.
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CouchDatabase was renamed to SoledadBackend and a new class
CouchDatabase was created to hold all couchdb code. This should make
SoledadBackend less tied to database implementation. A few more
separations are needed to split into modules.
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This monkey patch was added to separate headers from content and use
them to PUT on couchdb. The original implementation makes it possible by
using two parameters in the constructor.
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CouchDocument is a subclass from SoledadDocument which holds conflicts,
making the server side aware of them. There is a module called document
on soledad.common that holds SoledadDocument. This commit moves
CouchDocument to its proper place.
Error raising logic and exceptions declarations are also moved into error
module inside common.
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