This commit introduces the new go-libp2p-gorpc streaming capabilities for
Cluster. The main aim is to work towards heavily reducing memory usage when
working with very large pinsets.
As a side-effect, it takes the chance to revampt all types for all public
methods so that pointers to static what should be static objects are not used
anymore. This should heavily reduce heap allocations and GC activity.
The main change is that state.List now returns a channel from which to read
the pins, rather than pins being all loaded into a huge slice.
Things reading pins have been all updated to iterate on the channel rather
than on the slice. The full pinset is no longer fully loaded onto memory for
things that run regularly like StateSync().
Additionally, the /allocations endpoint of the rest API no longer returns an
array of pins, but rather streams json-encoded pin objects directly. This
change has extended to the restapi client (which puts pins into a channel as
they arrive) and to ipfs-cluster-ctl.
There are still pending improvements like StatusAll() calls which should also
stream responses, and specially BlockPut calls which should stream blocks
directly into IPFS on a single call.
These are coming up in future commits.
- cluster method, ipfs connector method, rpc and rest apis,
command, etc for repo gc
- Remove extra space from policy generator
- Added special timeout for `/repo/gc` call to IPFS
- Added `RepoGCLocal` cluster rpc method, which will be used to run gc
on local IPFS daemon
- Added peer name to the repo gc struct
- Sorted with peer ids, while formatting(only affects cli
results)
- Special timeout setting where timeout gets checked from last update
- Added `local` argument, which would run gc only on contacted peer
This takes advantange of the latest features in go-cid, peer.ID and
go-multiaddr and makes the Go types serializable by default.
This means we no longer need to copy between Pin <-> PinSerial, or ID <->
IDSerial etc. We can now efficiently binary-encode these types using short
field keys and without parsing/stringifying (in many cases it just a cast).
We still get the same json output as before (with minor modifications for
Cids).
This should greatly improve Cluster performance and memory usage when dealing
with large collections of items.
License: MIT
Signed-off-by: Hector Sanjuan <hector@protocol.ai>
The monitor component should be in charge of deciding how it is
best to send metrics to other peers and what that means.
This adds the PublishMetric() method to the component interface
and moves that functionality from Cluster main component to the
basic monitor.
There is a behaviour change. Before, the metrics where sent only to
the leader, while the leader was the only peer to broadcast them everywhere.
Now, all peers broadcast all metrics everywhere. This is mostly
because we should not rely on the consensus layer providing a Leader(), so
we are taking the chance to remove this dependency.
Note that in any-case, pubsub monitoring should replace the
existing basic monitor. This is just paving the ground.
Additionally, in order to not duplicate the multiRPC code
in the monitor, I have moved that functionality to go-libp2p-gorpc
and added an rpcutil library to cluster which includes useful
methods to perform multiRPC requests (some of them existed in
util.go, others are new and help handling multiple contexts etc).
License: MIT
Signed-off-by: Hector Sanjuan <code@hector.link>
