* volume: forward fsync=true to replicas in ReplicatedWrite
When a write request carries fsync=true, only the primary volume server
flushed to disk: the replica fan-out URL in ReplicatedWrite only carried
type/ttl/ts/cm, so replicas always wrote without fsync even when the
client explicitly requested a durable write.
Forward the fsync request parameter to the replica volume servers so a
durable write means every replica has flushed to disk, not just the
primary. Replicas without fsync are untouched (zero behavior change).
* storage: flush a durable write inline while stopping
The fsync flag on the write path really selects the async batch worker,
and it was switched off once the store is stopping. So a fsync=true write
landing during the pre-stop drain got acked without ever being flushed -
and now that ReplicatedWrite forwards fsync, that covers replicas too.
Flush it inline instead of queueing it. The drain keeps accepting writes,
which is the whole point of preStopSeconds, and the ack still means the
.dat is on disk. If the fsync fails, the append comes back off the .dat
and the needle map goes back to what it pointed at before, so nothing
resolves to an offset past the truncated end.
* storage: make the store's stopping flag atomic
SetStopping runs on the signal handler goroutine while the write and
vacuum paths read the flag, so every read of it was racy. Nothing about
the shutdown ordering changes; only the flag itself is now safe to read.
* topology: check the errors the replication test was dropping
The mock replica ignored its response write and the mock master ignored
whatever Serve returned, so a broken mock would have shown up as a
confusing timeout rather than a failure. Also drops the explicit listener
close: grpc.Server.Stop already closes the listener it was given.
---------
Co-authored-by: hzsunchao <hzsunchao@corp.netease.com>
Co-authored-by: Chris Lu <chris.lu@gmail.com>
* operation: bound upload retries and honor context cancellation
retriedUploadData hardcoded 3 attempts and an uninterruptible backoff
sleep. A synchronous replica write to a dead host therefore paid the
full dial timeout three times over before failing.
Add UploadOption.MaxAttempts (<=0 keeps the default of 3) so callers can
cap attempts, and make the loop return as soon as the context is
cancelled so an abandoned upload unwinds instead of retrying.
* topology: fail replica writes fast when a replica is unreachable
DistributedOperation already returns on the first error, but a single
dead replica is itself the slow result: its goroutine retries the upload
three times through the dial timeout (~30s) before any error surfaces,
stalling the originating client write the whole time.
Make the replica write a single attempt (MaxAttempts=1) so a dead
replica fails after one dial timeout instead of three, and thread a
context into DistributedOperation that is cancelled once the outcome is
decided, so a healthy replica is no longer held hostage by one stalled
in a dial. The originating client write is what retries.
* topology: keep replica deletes off the client request context
ReplicatedDelete runs after the local needle is already deleted. Driving
the replica deletes off r.Context() means a client disconnect cancels
them and orphans needles on the replicas, so use a background context.
* operation, topology: trim comments on the replica fail-fast path
