Commit graph

8 commits

Author SHA1 Message Date
Evgenii Stratonikov
4437cd7113 [#1442] pilorama: Generate timestamp based on node position in the container
Signed-off-by: Evgenii Stratonikov <evgeniy@nspcc.ru>
2022-07-21 15:08:24 +03:00
Evgenii Stratonikov
3312924b82 [#1431] pilorama: Use Batch for write transactions
Helps a lot in case of concurrent request flow.

```
name                      old time/op    new time/op    delta
ApplySequential/bbolt-8     78.0µs ± 9%    59.8µs ± 4%  -23.39%  (p=0.000 n=10+9)
ApplyReorderLast/bbolt-8     143µs ± 5%     113µs ±15%  -21.06%  (p=0.000 n=10+10)

name                      old alloc/op   new alloc/op   delta
ApplySequential/bbolt-8     56.9kB ± 8%    28.9kB ± 3%  -49.22%  (p=0.000 n=10+10)
ApplyReorderLast/bbolt-8    87.3kB ± 3%    40.9kB ±10%  -53.16%  (p=0.000 n=10+10)

name                      old allocs/op  new allocs/op  delta
ApplySequential/bbolt-8        224 ±11%       262 ± 5%  +16.93%  (p=0.000 n=9+10)
ApplyReorderLast/bbolt-8       518 ± 4%       674 ±11%  +30.09%  (p=0.000 n=10+10)
```

Signed-off-by: Evgenii Stratonikov <evgeniy@nspcc.ru>
2022-07-21 15:08:24 +03:00
Evgenii Stratonikov
f0a67f948d [#1431] pilorama: Cache attributes in the index
Currently to find a node by path we iterate over all the children on
each level. This is far from optimal and scales badly with the number of
nodes on a single level. Thus we introduce "indexed attributes" for
which an additional information is stored and which can be use in
`*ByPath` operations. Currently this set only includes `FileName`
attribute but this may change in future.

Signed-off-by: Evgenii Stratonikov <evgeniy@nspcc.ru>
2022-07-21 15:08:24 +03:00
Evgenii Stratonikov
536857ea5a [#1329] services/tree: Implement GetOpLog RPC
Signed-off-by: Evgenii Stratonikov <evgeniy@nspcc.ru>
2022-07-21 15:08:24 +03:00
Evgenii Stratonikov
7703dd5d7f [#1419] pilorama: Create new nodes in path if needed
Consider a node `{FileName: "dir", Attribute: "xxx"}`. In case we add
a new node by path `["dir", "file.txt"]`, create a new intermediate node
with a single attribute.

`GetByPath` now also considers only nodes with a single attribute while building a path.

Signed-off-by: Evgenii Stratonikov <evgeniy@nspcc.ru>
2022-07-21 15:08:24 +03:00
Evgenii Stratonikov
ad48918a97 [#1406] pilorama: Return parent from TreeGetMeta
Signed-off-by: Evgenii Stratonikov <evgeniy@nspcc.ru>
2022-07-21 15:08:24 +03:00
Evgenii Stratonikov
aea855e8f3 [#1326] services/tree: Implement GetSubTree RPC
Signed-off-by: Evgenii Stratonikov <evgeniy@nspcc.ru>
2022-07-21 15:08:24 +03:00
Evgenii Stratonikov
8cf71b7f1c [#1324] local_object_storage: Implement tree service backend
In this commit we implement algorithm for CRDT trees from
https://martin.klepmann.com/papers/move-op.pdf

Each tree is identified by the ID of a container it belongs to
and the tree name itself. Essentially, it is a sequence of operations
which should be applied in chronological order to get a usual tree
representation.

There are 2 backends for now: bbolt database and in-memory.
In-memory backend is here for debugging and will eventually act
as a memory-cache for the on-disk database.

Signed-off-by: Evgenii Stratonikov <evgeniy@nspcc.ru>
2022-07-21 15:08:24 +03:00