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128 Commits

Author SHA1 Message Date
Matej Ferencevic
e4edb2be99 Finalize storage v2 index API 
Reviewers: teon.banek

Reviewed By: teon.banek

Subscribers: pullbot

Differential Revision: https://phabricator.memgraph.io/D2543
 2019-11-12 12:11:38 +01:00
Matej Ferencevic
a850644f5d Fix atomic memory ordering in durability 
Summary:
The atomic memory order should be `acquire` for `load` operations, `release`
for `store` operations and `acq_rel` for any RMW (read-modify-write) operations
(like `fetch_add`).

Reviewers: teon.banek

Reviewed By: teon.banek

Subscribers: pullbot

Differential Revision: https://phabricator.memgraph.io/D2540
 2019-11-11 12:57:04 +01:00
Matej Ferencevic
9eb1f1d5cd Implement ClearProperties for storage v2 
Reviewers: teon.banek

Reviewed By: teon.banek

Subscribers: pullbot

Differential Revision: https://phabricator.memgraph.io/D2537
 2019-11-07 13:07:26 +01:00
Matej Ferencevic
73134ab6b7 Integrate all storage v2 flags into main binary 
Reviewers: teon.banek

Reviewed By: teon.banek

Subscribers: pullbot

Differential Revision: https://phabricator.memgraph.io/D2528
 2019-11-04 17:01:56 +01:00
Matej Ferencevic
4248b140d4 Backup existing durability files 
Reviewers: teon.banek

Reviewed By: teon.banek

Subscribers: pullbot

Differential Revision: https://phabricator.memgraph.io/D2526
 2019-11-04 10:38:13 +01:00
Matej Ferencevic
875a4a8629 Implement WAL loading for storage v2 
Reviewers: teon.banek

Reviewed By: teon.banek

Subscribers: pullbot

Differential Revision: https://phabricator.memgraph.io/D2521
 2019-10-31 17:12:37 +01:00
Matej Ferencevic
13ba9cc23e Implement WAL writing for storage v2 
Reviewers: teon.banek

Reviewed By: teon.banek

Subscribers: pullbot

Differential Revision: https://phabricator.memgraph.io/D2515
 2019-10-29 16:18:12 +01:00
Matej Ferencevic
2e0586e182 Implement single function for WAL loading 
Reviewers: teon.banek

Reviewed By: teon.banek

Subscribers: pullbot

Differential Revision: https://phabricator.memgraph.io/D2513
 2019-10-28 15:42:49 +01:00
Matej Ferencevic
98855889d5 Implement WalFile for storage v2 
Reviewers: teon.banek

Reviewed By: teon.banek

Subscribers: pullbot

Differential Revision: https://phabricator.memgraph.io/D2510
 2019-10-25 16:08:17 +02:00
Matej Ferencevic
3bed1cc3ea Correctly pass config into AllVerticesIterable 
Reviewers: teon.banek

Reviewed By: teon.banek

Subscribers: pullbot

Differential Revision: https://phabricator.memgraph.io/D2500
 2019-10-21 14:15:32 +02:00
Matej Ferencevic
842f0f3bf6 Add missing check to snapshot recovery 
Reviewers: teon.banek

Reviewed By: teon.banek

Subscribers: pullbot

Differential Revision: https://phabricator.memgraph.io/D2490
 2019-10-16 13:18:52 +02:00
Matej Ferencevic
3adedc0679 Implement snapshots for storage v2 
Reviewers: teon.banek

Reviewed By: teon.banek

Subscribers: pullbot

Differential Revision: https://phabricator.memgraph.io/D2400
 2019-10-01 13:42:37 +02:00
Matej Ferencevic
3756534490 Don't crash the database when using utils::InputFile 
Reviewers: teon.banek

Reviewed By: teon.banek

Subscribers: pullbot

Differential Revision: https://phabricator.memgraph.io/D2460
 2019-10-01 10:15:42 +02:00
Matej Ferencevic
8c7c593680 Clean-up of storage v2 delta 
Reviewers: teon.banek

Reviewed By: teon.banek

Subscribers: pullbot

Differential Revision: https://phabricator.memgraph.io/D2451
 2019-09-27 10:47:28 +02:00
Matej Ferencevic
9ad49698e9 Add support for disabling properties on edges 
Reviewers: teon.banek

Reviewed By: teon.banek

Subscribers: pullbot

Differential Revision: https://phabricator.memgraph.io/D2447
 2019-09-25 10:17:19 +02:00
Matej Ferencevic
8b6ae08682 Create/drop label indices explicitly in storage v2 
Reviewers: teon.banek

Reviewed By: teon.banek

Subscribers: pullbot

Differential Revision: https://phabricator.memgraph.io/D2432
 2019-09-24 13:12:50 +02:00
Matej Ferencevic
3079522f47 Make storage v2 config hierarchical 
Reviewers: teon.banek

Reviewed By: teon.banek

Subscribers: pullbot

Differential Revision: https://phabricator.memgraph.io/D2434
 2019-09-23 16:03:53 +02:00
Matej Ferencevic
9d39ecab7b Implement encoder/decoder for durability v2 
Reviewers: teon.banek

Reviewed By: teon.banek

Subscribers: pullbot

Differential Revision: https://phabricator.memgraph.io/D2393
 2019-09-18 16:32:32 +02:00
Matej Ferencevic
55d8b98aeb Prepare storage v2 config for more options 
Reviewers: teon.banek

Reviewed By: teon.banek

Subscribers: pullbot

Differential Revision: https://phabricator.memgraph.io/D2382
 2019-09-13 12:42:23 +02:00
Matej Ferencevic
b74141aafe Fix accessor locking in storage v2 
Reviewers: teon.banek

Reviewed By: teon.banek

Subscribers: pullbot

Differential Revision: https://phabricator.memgraph.io/D2376
 2019-09-12 13:11:12 +02:00
Teon Banek
7bd45f8714 Make query execution work with storage_v2 
Reviewers: mferencevic, ipaljak

Reviewed By: mferencevic

Subscribers: pullbot

Differential Revision: https://phabricator.memgraph.io/D2203
 2019-09-12 10:22:00 +02:00
Matej Ferencevic
73379bc57e Add functions for listing indices and constraints 
Reviewers: teon.banek

Reviewed By: teon.banek

Subscribers: pullbot

Differential Revision: https://phabricator.memgraph.io/D2371
 2019-09-11 15:45:14 +02:00
Teon Banek
1000a5e544 Use BasicResult instead of optional for v2 Commit 
Summary: Depends on D2365

Reviewers: mferencevic, ipaljak

Reviewed By: mferencevic

Subscribers: pullbot

Differential Revision: https://phabricator.memgraph.io/D2366
 2019-09-10 13:32:54 +02:00
Teon Banek
f02617f2bd Replace query::GraphView with storage::View 
Reviewers: mferencevic, ipaljak

Reviewed By: mferencevic

Subscribers: pullbot

Differential Revision: https://phabricator.memgraph.io/D2356
 2019-09-06 14:58:27 +02:00
Teon Banek
9a94205a07 Document exceptions and other details in storage v2 API 
Summary:
Most instances of `@throw std::bad_alloc` are left unexplained as these
functions perform general heap allocations are it's obvious from the
function name that it will do so. Basically anything with `Create`, `Make` or
`Build` implies allocations. Additionally, which parts exactly perform
allocations are an implementation detail. Functions which do unexpected
heap allocations have the reason stated in the documentation, these
functions typically have exactly one spot which could raise such an
exception.

Some functions are marked as `noexcept`, these are usually "special
functions" such as constructors and operators. This could potentially
improve performance because STL may use API overloads that work faster
with `noexcept` stuff. Remaining non-throwing functions aren't marked as
`noexcept` as that wasn't our practice nor is common in our codebase. On
the other hand, if we continue enforcing the documentation of thrown
exceptions, perhaps we should start using `noexcept`.

Reviewers: mferencevic, ipaljak

Reviewed By: mferencevic

Subscribers: pullbot

Differential Revision: https://phabricator.memgraph.io/D2350
 2019-09-05 10:04:40 +02:00
Teon Banek
02722a1ed5 Add default constructor and std::hash to v2/id_types 
Reviewers: mferencevic, ipaljak

Reviewed By: mferencevic

Subscribers: pullbot

Differential Revision: https://phabricator.memgraph.io/D2349
 2019-09-03 16:13:52 +02:00
Matej Ferencevic
a4a74934f4 Improve memory allocations in execution and storage 
Reviewers: teon.banek

Reviewed By: teon.banek

Subscribers: pullbot

Differential Revision: https://phabricator.memgraph.io/D2340
 2019-09-02 17:03:58 +02:00
Teon Banek
c8340ad120 Merge old and new PropertyValue implementations 
Summary:
This effectively replaces the old PropertyValue implementation from the
one in storage/v2

Depends on D2333

Reviewers: mferencevic, ipaljak

Reviewed By: mferencevic

Subscribers: pullbot

Differential Revision: https://phabricator.memgraph.io/D2335
 2019-09-02 16:43:50 +02:00
Marin Tomic
7e741b8d25 Implement vertex count estimation 
Reviewers: teon.banek, mferencevic

Reviewed By: teon.banek

Subscribers: pullbot

Differential Revision: https://phabricator.memgraph.io/D2306
 2019-08-22 17:34:00 +02:00
Matej Ferencevic
a9d2f4842f Reduce GC CPU usage in storage v2 
Reviewers: mtomic, teon.banek

Reviewed By: mtomic

Subscribers: pullbot

Differential Revision: https://phabricator.memgraph.io/D2313
 2019-08-22 14:09:56 +02:00
Marin Tomic
21d461e77d Skip deleted vertices when building index 
Summary:
There's a possible race condition where we add a deleted vertex into
index and garbage collection removes it from main storage before indices are
cleaned-up.

Reviewers: mferencevic, teon.banek

Reviewed By: mferencevic

Subscribers: pullbot

Differential Revision: https://phabricator.memgraph.io/D2314
 2019-08-22 10:25:44 +02:00
Teon Banek
4f93632fb8 storage/v2: Add (In|Out)Degree to VertexAccessor 
Reviewers: mtomic, mferencevic

Reviewed By: mferencevic

Subscribers: pullbot

Differential Revision: https://phabricator.memgraph.io/D2309
 2019-08-21 12:58:00 +02:00
Marin Tomic
1ab0b8e0ff Implement existence constraints 
Reviewers: teon.banek, mferencevic

Reviewed By: teon.banek, mferencevic

Subscribers: pullbot

Differential Revision: https://phabricator.memgraph.io/D2307
 2019-08-20 16:27:36 +02:00
Teon Banek
b8e964a82d Remove is_transaction_starter_ from Storage::Accessor 
Reviewers: mferencevic, mtomic

Reviewed By: mferencevic

Subscribers: pullbot

Differential Revision: https://phabricator.memgraph.io/D2308
 2019-08-20 12:43:05 +02:00
Matej Ferencevic
d263d0887f Fix bug in storage v2 GC 
Reviewers: mtomic, teon.banek

Reviewed By: mtomic

Subscribers: pullbot

Differential Revision: https://phabricator.memgraph.io/D2304
 2019-08-19 13:21:35 +02:00
Teon Banek
ce9e2614fa Invert the result of SetProperty and add documentation 
Reviewers: mtomic, mferencevic

Reviewed By: mferencevic

Subscribers: pullbot

Differential Revision: https://phabricator.memgraph.io/D2297
 2019-08-13 16:21:33 +02:00
Teon Banek
34f80722c2 Return Error::DELETED_OBJECT from CreateEdge instead of aborting 
Reviewers: mtomic, mferencevic

Reviewed By: mferencevic

Subscribers: pullbot

Differential Revision: https://phabricator.memgraph.io/D2295
 2019-08-09 12:38:20 +02:00
Teon Banek
e18cb7b4c7 Make Result constructors implicit 
Reviewers: mferencevic, mtomic, msantl

Reviewed By: mferencevic

Subscribers: pullbot

Differential Revision: https://phabricator.memgraph.io/D2293
 2019-08-08 15:47:35 +02:00
Teon Banek
5bae9c6457 Move storage::Result to utils 
Summary:
Utils now contain a BasicResult implementation which supports different
types of error. This will make it useful for other parts of the code as
well as during the transition from old to new storage.

Reviewers: mtomic, msantl, mferencevic

Reviewed By: mferencevic

Subscribers: pullbot

Differential Revision: https://phabricator.memgraph.io/D2291
 2019-08-08 14:37:06 +02:00
Teon Banek
134525851b Expose Id mappings from accessor-less Storage 
Reviewers: mtomic, mferencevic

Reviewed By: mferencevic

Subscribers: pullbot

Differential Revision: https://phabricator.memgraph.io/D2285
 2019-08-06 14:30:21 +02:00
Teon Banek
ed9f82bcf4 Add a common VerticesIterable wrapper 
Summary:
This ought to simplify the code which needs to work with any kind of
vertex iteration, be it through an index store or regular.

Reviewers: mtomic, mferencevic

Reviewed By: mferencevic

Subscribers: pullbot

Differential Revision: https://phabricator.memgraph.io/D2258
 2019-08-06 13:30:31 +02:00
Matej Ferencevic
bad1f8b525 Remove copy constructor/assignment from SkipList accessors 
Reviewers: teon.banek

Reviewed By: teon.banek

Subscribers: pullbot

Differential Revision: https://phabricator.memgraph.io/D2230
 2019-08-06 11:18:31 +02:00
Teon Banek
fc493e36ff Add lvalue and rvalue getters to storage::Result 
Reviewers: mtomic, mferencevic

Reviewed By: mtomic

Subscribers: pullbot

Differential Revision: https://phabricator.memgraph.io/D2242
 2019-07-26 15:47:14 +02:00
Marin Tomic
35587cddbd [StorageV2] Implement label and label-property indices 
Reviewers: mferencevic, teon.banek

Reviewed By: teon.banek

Subscribers: pullbot

Differential Revision: https://phabricator.memgraph.io/D2225
 2019-07-26 12:23:18 +02:00
Teon Banek
adc4ebacff Make (Edge|Vertex)Accessor methods const as appropriate 
Reviewers: mtomic, mferencevic

Reviewed By: mtomic

Subscribers: pullbot

Differential Revision: https://phabricator.memgraph.io/D2232
 2019-07-24 09:46:24 +02:00
Teon Banek
867f30d9b3 Add VerticesIterable to storage/v2 
Reviewers: mtomic, mferencevic

Reviewed By: mtomic

Subscribers: pullbot

Differential Revision: https://phabricator.memgraph.io/D2229
 2019-07-23 13:04:16 +02:00
Marin Tomic
ffa76e59c9 Implement deferred vertex/edge deletion 
Summary: this will make GC for indices easier

Reviewers: teon.banek, mferencevic

Reviewed By: teon.banek, mferencevic

Subscribers: pullbot

Differential Revision: https://phabricator.memgraph.io/D2223
 2019-07-23 09:52:54 +02:00
Marin Tomic
08bf993a47 Add a global storage lock in storage v2 
Reviewers: mferencevic, teon.banek

Reviewed By: mferencevic, teon.banek

Subscribers: pullbot

Differential Revision: https://phabricator.memgraph.io/D2202
 2019-07-22 15:05:44 +02:00
Matej Ferencevic
d7d0963434 Implement explicit types in storage v2 
Reviewers: teon.banek, mtomic

Reviewed By: teon.banek

Subscribers: pullbot

Differential Revision: https://phabricator.memgraph.io/D2224
 2019-07-22 14:16:02 +02:00
Matej Ferencevic
e9a7623288 Implement name to id mapper in storage v2 
Reviewers: teon.banek, mtomic

Reviewed By: mtomic

Subscribers: pullbot

Differential Revision: https://phabricator.memgraph.io/D2217
 2019-07-19 11:24:27 +02:00
Matej Ferencevic
10136f43dc Replace unordered_map with map in storage v2 
Summary:
`std::unordered_map` is 56 bytes in size, `std::map` is 48 bytes in size.
Also, `std::map` doesn't require the key type to be hashable.

Reviewers: mtomic, teon.banek

Reviewed By: teon.banek

Subscribers: pullbot

Differential Revision: https://phabricator.memgraph.io/D2218
 2019-07-18 13:43:12 +02:00
Teon Banek
59b3f84eb9 Set [[nodiscard]] attribute on storage::Result 
Reviewers: mtomic, mferencevic

Reviewed By: mferencevic

Subscribers: pullbot

Differential Revision: https://phabricator.memgraph.io/D2214
 2019-07-17 15:11:29 +02:00
Teon Banek
e7b1d1aa0c Add std::hash for V2 (Edge|Vertex)Accessor 
Reviewers: mferencevic, mtomic

Reviewed By: mferencevic

Subscribers: pullbot

Differential Revision: https://phabricator.memgraph.io/D2212
 2019-07-17 13:37:26 +02:00
Matej Ferencevic
4e1c7c9e34 Rename Return to Value in storage v2 Result 
Reviewers: mtomic, teon.banek

Reviewed By: teon.banek

Subscribers: pullbot

Differential Revision: https://phabricator.memgraph.io/D2199
 2019-07-17 12:33:39 +02:00
Teon Banek
bf4f69f2e5 storage/v2: Reduce the (In|Out)Edges tuple to only EdgeAccessor 
Summary:
The first 2 tuple elements are redundant as they are available through
EdgeAccessor and they needlessly complicate the usage of the API.

Reviewers: mtomic, mferencevic

Reviewed By: mtomic

Subscribers: pullbot

Differential Revision: https://phabricator.memgraph.io/D2200
 2019-07-12 15:30:24 +02:00
Matej Ferencevic
15c959dfb5 Fix transaction abort object deletion in storage v2 
Reviewers: mtomic, teon.banek

Reviewed By: mtomic

Subscribers: pullbot

Differential Revision: https://phabricator.memgraph.io/D2198
 2019-07-11 15:59:48 +02:00
Matej Ferencevic
d9a6775656 Move transaction to stack in storage v2 
Reviewers: mtomic, teon.banek

Reviewed By: mtomic

Subscribers: pullbot

Differential Revision: https://phabricator.memgraph.io/D2196
 2019-07-11 15:04:10 +02:00
Marin Tomic
8414479abe [StorageV2] Implement GC 
Summary:
Here are some numbers from the benchmark:

```
(TOOLCHAIN) mtomic@poso:~/memgraph/build_release$ tests/benchmark/storage_v2_gc --num-threads 8
Config: NoGc, Time: 25.9836
Config: OnFinishGc, Time: 49.012
Config: 100msPeriodicGc, Time: 45.9856
Config: 1000msPeriodicGc, Time: 40.3094
```

```
(TOOLCHAIN) mtomic@poso:~/memgraph/build_release$ tests/benchmark/storage_v2_gc --num-threads 7
Config: NoGc, Time: 20.4256
Config: OnFinishGc, Time: 39.6669
Config: 100msPeriodicGc, Time: 30.7956
Config: 1000msPeriodicGc, Time: 35.128
```

It is not that bad if there is a core dedicated to doing garbage collection.

Reviewers: mferencevic, teon.banek

Reviewed By: mferencevic, teon.banek

Subscribers: pullbot

Differential Revision: https://phabricator.memgraph.io/D2168
 2019-07-10 16:12:08 +02:00
Marin Tomic
a4da2f123c [StorageV2] Fix object deletion in Abort function 
Summary:
`lock_guard` is holding vertex lock while we're deleting the vertex,
and then it might try to unlock it in its destructor and access freed memory.

Reviewers: teon.banek, mferencevic

Reviewed By: mferencevic

Subscribers: pullbot

Differential Revision: https://phabricator.memgraph.io/D2192
 2019-07-10 10:20:58 +02:00
Matej Ferencevic
18e2f9eeda Make previous pointer atomic in storage v2 
Reviewers: mtomic, teon.banek

Reviewed By: mtomic

Subscribers: pullbot

Differential Revision: https://phabricator.memgraph.io/D2191
 2019-07-09 16:26:10 +02:00
Matej Ferencevic
4d94aa740a Implement multiple previous pointer in storage v2 
Reviewers: mtomic, teon.banek

Reviewed By: mtomic

Subscribers: pullbot

Differential Revision: https://phabricator.memgraph.io/D2190
 2019-07-09 14:24:28 +02:00
Matej Ferencevic
b1f7bbf051 Implement properties for edges in storage v2 
Reviewers: mtomic, teon.banek

Reviewed By: mtomic

Subscribers: pullbot

Differential Revision: https://phabricator.memgraph.io/D2187
 2019-07-08 16:55:47 +02:00
Matej Ferencevic
5b8e7ff432 Implement edges in storage v2 
Summary:
This change implements full edges support in storage v2. Edges can be created
and deleted. Support for detach-deleting vertices is added and regular vertex
deletion verifies existance of edges.

Reviewers: mtomic, teon.banek

Reviewed By: mtomic

Subscribers: pullbot

Differential Revision: https://phabricator.memgraph.io/D2180
 2019-07-08 16:06:57 +02:00
Matej Ferencevic
069000a92a Fix CommitLog namespace in storage v2 
Reviewers: mtomic

Reviewed By: mtomic

Subscribers: pullbot

Differential Revision: https://phabricator.memgraph.io/D2179
 2019-07-05 13:53:32 +02:00
Matej Ferencevic
26f14443c2 Move vertex deletion to storage accessor 
Reviewers: mtomic, teon.banek

Reviewed By: mtomic

Subscribers: pullbot

Differential Revision: https://phabricator.memgraph.io/D2174
 2019-07-04 14:47:14 +02:00
Matej Ferencevic
6e6dff81e0 Split storage and vertex accessor into cpp in storage v2 
Reviewers: mtomic, teon.banek

Reviewed By: mtomic

Subscribers: pullbot

Differential Revision: https://phabricator.memgraph.io/D2172
 2019-07-04 12:56:06 +02:00
Matej Ferencevic
0833a74fd8 Refactor storage delta in storage v2 
Reviewers: mtomic, teon.banek

Reviewed By: mtomic

Subscribers: pullbot

Differential Revision: https://phabricator.memgraph.io/D2171
 2019-07-03 15:22:38 +02:00
Matej Ferencevic
db72ef05f8 Add support for vertex properties to storage v2 
Reviewers: mtomic, teon.banek

Reviewed By: mtomic

Subscribers: pullbot

Differential Revision: https://phabricator.memgraph.io/D2163
 2019-07-03 11:07:57 +02:00
Matej Ferencevic
83a99aaf7d Implement vertex deletion in storage v2 
Reviewers: mtomic, teon.banek

Reviewed By: mtomic

Subscribers: pullbot

Differential Revision: https://phabricator.memgraph.io/D2157
 2019-07-01 16:54:34 +02:00
Matej Ferencevic
9e649794fc Rework delta creation in storage v2 
Reviewers: mtomic, teon.banek

Reviewed By: mtomic

Subscribers: pullbot

Differential Revision: https://phabricator.memgraph.io/D2159
 2019-07-01 15:47:43 +02:00
Marin Tomic
c7a8be31cb [StorageV2] Fix move constructor for delta 
Reviewers: mferencevic, teon.banek

Reviewed By: mferencevic

Differential Revision: https://phabricator.memgraph.io/D2158
 2019-07-01 14:43:15 +02:00
Marin Tomic
71c76cfb73 [StorageV2] Make delta list double linked 
Summary: this is necessary for garbage collection

Reviewers: teon.banek, mferencevic

Reviewed By: mferencevic

Subscribers: pullbot

Differential Revision: https://phabricator.memgraph.io/D2156
 2019-07-01 14:16:20 +02:00
Marin Tomic
a7fabe6109 Fix PrepareForWrite function in storage V2 
Summary:
We forgot to update `modified_vertices` in the case when the vertex
has an empty version chain. It didn't manifest before because it was impossible
for a vertex to have an empty version chain without garbage collection.

Reviewers: mferencevic, teon.banek

Reviewed By: mferencevic

Subscribers: pullbot

Differential Revision: https://phabricator.memgraph.io/D2154
 2019-07-01 13:02:51 +02:00
Matej Ferencevic
f2b23828ab Implement PropertyValue for storage v2 
Reviewers: teon.banek, mtomic

Reviewed By: mtomic

Subscribers: pullbot

Differential Revision: https://phabricator.memgraph.io/D2149
 2019-07-01 10:56:33 +02:00
Marin Tomic
fabfa77bd9 Fix CreateVertex function in storage v2 
Summary:
We forgot to add the newly created vertex into `modified_vertices`
list.

Reviewers: teon.banek, mferencevic

Reviewed By: mferencevic

Differential Revision: https://phabricator.memgraph.io/D2153
 2019-06-28 15:43:57 +02:00
Matej Ferencevic
8169513f57 Remove unnecessary constructors from storage v2 
Reviewers: teon.banek

Reviewed By: teon.banek

Subscribers: pullbot

Differential Revision: https://phabricator.memgraph.io/D2152
 2019-06-28 14:43:35 +02:00
Marin Tomic
6ce8fae54a Implement commit log for storage v2 
Reviewers: teon.banek, mferencevic

Reviewed By: teon.banek, mferencevic

Subscribers: pullbot

Differential Revision: https://phabricator.memgraph.io/D2148
 2019-06-27 13:52:51 +02:00
Matej Ferencevic
54e1e4e1ff Initial version of storage v2 
Summary:
Initial implementation of new storage engine.  It implements snapshot isolation
for transactions.  All changes in the database are stored as deltas instead of
making full copies.  Currently, the storage supports full transaction
functionality (commit, abort, command advancement).  Also, support has been
implemented only for vertices that have only labels.

Reviewers: teon.banek, mtomic

Reviewed By: teon.banek

Subscribers: pullbot

Differential Revision: https://phabricator.memgraph.io/D2138
 2019-06-27 10:52:38 +02:00