This commit includes functionality to turn on
the object serializer for network communication.
This is done the following way:
- On incoming connections, a process will detect
whether the client supports the object serializer
and will only serialize responses with it, if it does
- On outgoing connections, the command line flag is used
to determine whether the object serializer should be used
to send data.
This way, a cluster can run in mixed mode. To upgrade one
can upgrade one process at a time and set the flag one process
at a time.
This is how this is tested on the simulator:
- The command line flag can take three options: on, off,
and random.
- For off, the object serializer will never we used.
- For on, the object serializer will be always used.
- For random, the simulator will flip a coin for each
process it starts up.
This change allows a user to write a workload in Java.
The way this is implemented is by creating a JVM within the
simulator and calling the corresponding workload class. A
workload can then run in the simulator or on a testing cluster.
If the workload is executed within the simulator, the resulting
test will not be deterministic anymore as it will execute in a
different thread (and even without that it is not clear, whether
we could get determinism as the JVM does a lot of stuff that are
not deterministic).
This is intendet to get better testing of the Java client and
layer authors can use the simulator to test their layers on a single
machine but they can still simulate failing machines etc.
Add a new role for ratekeeper.
Remove StorageServerChanges from data distribution.
Ratekeeper monitors storage servers, which borrows the idea from
DataDistribution.
- NetworkAddress now contains IPAddress object which can be either
IPv4 or IPv6 address. 128bits are used even for IPv4 addresses,
however only 32bits are used when using/serializing IPv4 address.
- ConnectPacket is updated to store IPv6 address. Backward compatible
with old format since the first 32bits of IP address field is used
for serialization of IPv4.
- Mainly updates rest of the code to use IPAddress structure instead
of plain uint32_t.
- IPv6 address/pair ports should be represented as `[ip]:port` as per
convention. This applies to both cluster files and command line
arguments.
Let cluster controller to start a new data distributor role by sending a
message to a chosen worker.
Change MasterInterface usage in DataDistribution to masterId
Add DataDistributor rejoin handling.
This allows the data distributor to tell the new cluster controller of its
existence so that the controller doesn't spawn a new one. I.e., there should
be only ONE data distributor in the cluster.
If DataDistributor (DD) doesn't join in a while, then ClusterController (CC) tries
to recruit one as DD. CC also monitors DD and restarts one if it failed.
The Proxy is also monitoring the DD. If DD failed, the Proxy will ask CC for
the new DD.
Add GetRecoveryInfo RPC to master server, which is called by data distributor
to obtain the recovery Transaction version from the master server.
Sim2Listener can now take the network address to listen on. This is
used to listen to multiple ports in simulator and test the patch
which added multiple network addresses to single endpoint.
- This patch will make FDB listen to multiple addresses given via
command line. Although, we'll still use first address in most places,
this patch starts using vector<NetworkAddress> in Endpoint at some basic
places.
- When sending packets to an endpoint, pick a random network address in
endpoints
- Renames Endpoint::address to Endpoint::addresses since it
now holds a vector of addresses.
Extend `Endpoint` class to take multiple NetworkAddresses instead of
just one. Hence, to talk to an endpoint instead of one IP:PORT, we'll
have multiple IP:PORT pairs.
This patch simply adds the field and makes changes to compile the
codebase. The first element of of `address` field is used everywhere.
Hence the way we talk to remains same with this patch.
NOTE:
Directly accessing the first memeber of Endpoint::address is unsafe
as Endpoint() doesn't enforces non-empty address list. However, since
the correctness test pass for now and are anyway replacing all those
unsafe accesses with ones considering the whole vector, this patch
ignores to access them in safe way.
Remove the use of relative paths. A header at foo/bar.h could be included by
files under foo/ with "bar.h", but would be included everywhere else as
"foo/bar.h". Adjust so that every include references such a header with the
latter form.
Signed-off-by: Robert Escriva <rescriva@dropbox.com>
fix: we cannot pop the txs tag from remote logs until they have a full copy of the txnStateStore
fix: we have to modify all of history, we cannot stop after finding a local remote
canKillProcess logic was wrong.
We still need to configure usable_regions because if datacenterVersionDifference is too large we cannot complete data movement.
removed unused simulation variables
run the simulation with only 1 coordinator most of the time, since we protect the coordinator from being killed, and protecting too many things is bad for simulation
fix: the master did not monitor for the failure of remote logs
stop merge attempts when a data center is failed
fixed a variety of other problems with data distribution when a data center is failed
Jingyu Zhou