LRU `Peek`/`Contains` take LRU mutex _inside_ of a `View` transaction.
`View` transaction itself takes `mmapLock` [1], which is lifted after tx
finishes (in `tx.Commit()` -> `tx.close()` -> `tx.db.removeTx`)
When we evict items from LRU cache mutex order is different:
first we take LRU mutex and then execute `Batch` which _does_ take
`mmapLock` in case we need to remap. Thus the deadlock.
[1] 8f4a7e1f92/db.go (L708)
Signed-off-by: Evgenii Stratonikov <e.stratonikov@yadro.com>
To achieve high performance we must choose proper values for both
batch size and delay. For user operations we want to set low delay.
However it would prevent tree synchronization operations to form big
enough batches. For these operations, batching gives the most benefit
not only in terms of on-CPU execution cost, but also by speeding up
transaction persist (`fsync`).
In this commit we try merging batches that are already
_triggered_, but not yet _started to execute_. This way we can still
query batches for execution after the provided delay while also allowing
multiple formed batches to execute faster.
Signed-off-by: Evgenii Stratonikov <e.stratonikov@yadro.com>
If we had lots of domains in one zone, `dump-hashes` for all others
can miss some domains, because we need to restrict ourselves with _some_
number.
In this commit we use neo-go sessions by default, with a proper
failback to in-script iterator unwrapping.
Signed-off-by: Evgenii Stratonikov <e.stratonikov@yadro.com>
"Object is expired" means that object is presented in `meta` but it is not
`ObjectNotFound` error. Previous implementation made `shard` search for an
object without `meta` which was an error.
Signed-off-by: Pavel Karpy <p.karpy@yadro.com>
```
name old time/op new time/op delta
_addressFromString-8 1.25µs ±30% 1.02µs ± 6% -18.49% (p=0.000 n=9+9)
name old alloc/op new alloc/op delta
_addressFromString-8 352B ± 0% 256B ± 0% -27.27% (p=0.000 n=9+10)
name old allocs/op new allocs/op delta
_addressFromString-8 6.00 ± 0% 4.00 ± 0% -33.33% (p=0.000
n=10+10)
```
Also, assure compiler that `s` doesn't escape:
Before this commit:
```
./fstree.go:74:24: leaking param: s
./fstree.go:90:6: moved to heap: addr
```
After this commit:
```
./fstree.go:74:24: s does not escape
```
Signed-off-by: Evgenii Stratonikov <e.stratonikov@yadro.com>
- Update sample configs to match unit tests
- Remove Docker container for N3 testnet
Will return with updates when FrostFS enters N3
Signed-off-by: Stanislav Bogatyrev <s.bogatyrev@yadro.com>
Currently we track based on `PayloadSize`, because it is already stored
in the metabase and it is easier to calculate without slowing down the
whole system.
Signed-off-by: Evgenii Stratonikov <e.stratonikov@yadro.com>
Signed-off-by: Pavel Karpy <p.karpy@yadro.com>
We rarely need to list all containers: as one example
we need it for tree service synchronization once per epoch.
Given that cache TTL has the order of block time it makes no sense
to cache the list of all containers.
Signed-off-by: Evgenii Stratonikov <e.stratonikov@yadro.com>
Currently the only way to tell whether `evacuate/set-mode` is finished
is to set a very big timeout and _hope_ that the operation will finish.
In this commit we add INFO logs for such operations which should
simplify the life of an administrator.
Signed-off-by: Evgenii Stratonikov <e.stratonikov@yadro.com>
Currently, under high load clients are blocked on channel send
and the number of goroutines can increase indefinitely.
In this commit we drop replication messages if send/recv queue is full
and rely on a background synchronization.
Signed-off-by: Evgenii Stratonikov <e.stratonikov@yadro.com>
