Comments (7)
That's helpful, thanks, but doesn't quite clarify if a single client object can be used by all those "multiple goroutines". It sounds like the answer is yes. This example suggests the same. Is that right?
However, a stream can't be shared.
That all sounds right to me.
@trevorgray, these kinds of concurrency topics are apparently still not documented, per #682.
Documentation is a well-known deficiency that I hope to address sometime this quarter.
from grpc-go.
Trying to summarize for myself...
@rubenv asks:
Can I use a client from different threads in parallel?
@iamqizhao replies:
On client, if you want to perform multiple rpc in parallel, you should spawn multiple goroutines to do that since the rpc is synchronous/blocking
That's helpful, thanks, but doesn't quite clarify if a single client object can be used by all those "multiple goroutines". It sounds like the answer is yes. This example suggests the same. Is that right?
However, a stream can't be shared.
@trevorgray, these kinds of concurrency topics are apparently still not documented, per #682.
from grpc-go.
On Fri, Feb 27, 2015 at 9:40 AM, Ruben Vermeersch [email protected]
wrote:
How does grpc handle concurrency? Can I use a client from different
threads in parallel?On client, if you want to perform multiple rpc in parallel, you should
spawn multiple goroutines to do that since the rpc is synchronous/blocking.—
Reply to this email directly or view it on GitHub
#85.
from grpc-go.
since the rpc is synchronous/blocking
That's what I got from looking at the route_guide
example: the server's end points access a slice without locks. Is this considered quasi similar to an actor model? Is there documentation about this fact (I might have missed it)?
from grpc-go.
On Fri, Feb 27, 2015 at 11:27 AM, Jacques Fuentes [email protected]
wrote:
since the rpc is synchronous/blocking
That's what I got from looking at the route_guide example: the server's
end points access a slice without locks. Is this considered quasi similar
to an actor model? Is there documentation about this fact (I might have
missed it)?To be clear, I was talking about client side. On the server side, each rpc
still has its own goroutine but the concurrency is model is different --
the goroutine is spawned by grpc internals instead of applications.
Were you talking about "savedFeatures" slice? There is no lock for that
because it is read-only once it is initialized (in grpc.NewServer).
—
Reply to this email directly or view it on GitHub
#85 (comment).
from grpc-go.
There is no lock for that because it is read-only once it is initialized
Got it, thanks.
from grpc-go.
I also wasn't able to find this documented anywhere but this issue. Would you be able to add this to the godoc documentation to make it more clear that it's safe to call a client from multiple go routines concurrently?
from grpc-go.
Related Issues (20)
- GitHub Action: branch protection checks are skipped, and also not blocking merges HOT 3
- grpc.NewClient with namedpipe on Windows throws resolverError HOT 2
- User agent becomes grpc-go/1.64. on server side of grpc gateway HOT 3
- xds: move functionality from `xds/internal` to `internal/xds`
- stubserver: add support to optionally pass in a `grpc.Server` or `xds.GRPCServer` HOT 2
- Github Action: Codecov action is broken and is failing silently HOT 1
- Upgrade to using math/rand/v2 to get perf enhancements HOT 2
- xds: tests shouldn't rely on the presence of an entry in the `authorities` field of the bootstrap configuration with an empty key
- Experimental API related to metadata HOT 4
- Linter rule for using context.Background() without a timeout in tests HOT 4
- gRPC is incompatible with tls.Listener HOT 2
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- Feature Request: expose handleRawConn or add ServeConn HOT 26
- Flaky test: TimerAndWatchStateOnErrorCallback HOT 4
- xds: bootstrap config is not emitted to logs in a human readable way
- Strongly-type request inside a Stream Server Interceptor HOT 2
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- Why does grpc.NewClient silently ignore DialOptions? HOT 2
- Make transport.SetConnection public? HOT 4
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