mirror of
https://github.com/pingcap/tla-plus.git
synced 2024-12-26 20:40:15 +08:00
DistributedTransaction: rewrite monotonicity formulas to check SnapshotIsolation (#33)
* DistributedTransaction: rewrite monotonicity formulas Signed-off-by: ekexium <ekexium@gmail.com> * DistributedTransaction: check SnapshotIsolation Signed-off-by: ekexium <ekexium@gmail.com> * delete proof Signed-off-by: ekexium <ekexium@gmail.com>
This commit is contained in:
ekexium
GitHub
parent
b9806173e6
commit
6307a61097
@ -547,16 +547,12 @@ UniqueWrite ==
|
||||
\* Snapshot Isolation
|
||||
|
||||
\* Asserts that next_ts is monotonically increasing.
|
||||
NextTsMonotonicity ==
|
||||
\A ts \in Ts :
|
||||
(ts <= next_ts) => [](ts <= next_ts)
|
||||
NextTsMonotonicity == [][next_ts' >= next_ts]_vars
|
||||
|
||||
\* Asserts that no msg would be deleted once sent.
|
||||
MsgMonotonicity ==
|
||||
/\ \A req \in ReqMessages :
|
||||
req \in req_msgs => [](req \in req_msgs)
|
||||
/\ \A resp \in RespMessages :
|
||||
resp \in resp_msgs => [](resp \in resp_msgs)
|
||||
/\ [][\A req \in req_msgs : req \in req_msgs']_vars
|
||||
/\ [][\A resp \in resp_msgs : resp \in resp_msgs']_vars
|
||||
|
||||
\* Asserts that all messages sent should have ts less than next_ts.
|
||||
MsgTsConsistency ==
|
||||
|
||||
@ -1,12 +1,22 @@
|
||||
<?xml version="1.0" encoding="UTF-8" standalone="no"?>
|
||||
<launchConfiguration type="org.lamport.tla.toolbox.tool.tlc.modelCheck">
|
||||
<stringAttribute key="TLCCmdLineParameters" value=""/>
|
||||
<intAttribute key="collectCoverage" value="1"/>
|
||||
<stringAttribute key="configurationName" value="Test1"/>
|
||||
<booleanAttribute key="deferLiveness" value="false"/>
|
||||
<intAttribute key="dfidDepth" value="100"/>
|
||||
<booleanAttribute key="dfidMode" value="false"/>
|
||||
<intAttribute key="distributedFPSetCount" value="0"/>
|
||||
<stringAttribute key="distributedNetworkInterface" value="10.0.75.1"/>
|
||||
<stringAttribute key="distributedNetworkInterface" value="192.168.224.64"/>
|
||||
<intAttribute key="distributedNodesCount" value="1"/>
|
||||
<stringAttribute key="distributedTLC" value="off"/>
|
||||
<intAttribute key="fpIndex" value="8"/>
|
||||
<intAttribute key="maxHeapSize" value="25"/>
|
||||
<stringAttribute key="distributedTLCVMArgs" value=""/>
|
||||
<intAttribute key="fpBits" value="1"/>
|
||||
<intAttribute key="fpIndex" value="41"/>
|
||||
<booleanAttribute key="fpIndexRandom" value="true"/>
|
||||
<intAttribute key="maxHeapSize" value="40"/>
|
||||
<intAttribute key="maxSetSize" value="1000000"/>
|
||||
<booleanAttribute key="mcMode" value="true"/>
|
||||
<stringAttribute key="modelBehaviorInit" value=""/>
|
||||
<stringAttribute key="modelBehaviorNext" value=""/>
|
||||
<stringAttribute key="modelBehaviorSpec" value="Spec"/>
|
||||
@ -24,8 +34,11 @@
|
||||
<listEntry value="1UniqueWrite"/>
|
||||
<listEntry value="1MsgTsConsistency"/>
|
||||
</listAttribute>
|
||||
<listAttribute key="modelCorrectnessProperties"/>
|
||||
<intAttribute key="modelEditorOpenTabs" value="8"/>
|
||||
<listAttribute key="modelCorrectnessProperties">
|
||||
<listEntry value="1SnapshotIsolation"/>
|
||||
</listAttribute>
|
||||
<intAttribute key="modelEditorOpenTabs" value="12"/>
|
||||
<stringAttribute key="modelExpressionEval" value=""/>
|
||||
<listAttribute key="modelParameterConstants">
|
||||
<listEntry value="KEY;;{k1, k2};1;0"/>
|
||||
<listEntry value="CLIENT_KEY;;c1 :> {k1, k2} @@ c2 :> {k1} @@ c3 :> {k1, k2};0;0"/>
|
||||
@ -35,7 +48,13 @@
|
||||
</listAttribute>
|
||||
<intAttribute key="modelVersion" value="20191005"/>
|
||||
<intAttribute key="numberOfWorkers" value="6"/>
|
||||
<booleanAttribute key="recover" value="false"/>
|
||||
<stringAttribute key="result.mail.address" value=""/>
|
||||
<intAttribute key="simuAril" value="-1"/>
|
||||
<intAttribute key="simuDepth" value="100"/>
|
||||
<intAttribute key="simuSeed" value="-1"/>
|
||||
<stringAttribute key="specName" value="DistributedTransaction"/>
|
||||
<stringAttribute key="tlcResourcesProfile" value="local custom"/>
|
||||
<stringAttribute key="tlcResourcesProfile" value="local nomal"/>
|
||||
<stringAttribute key="view" value=""/>
|
||||
<booleanAttribute key="visualizeStateGraph" value="false"/>
|
||||
</launchConfiguration>
|
||||
|
||||
@ -1,47 +0,0 @@
|
||||
--------------------- MODULE DistributedTransactionProofs -------------------
|
||||
EXTENDS DistributedTransaction, TLAPS
|
||||
|
||||
THEOREM SpecTypeOK == Spec => TypeOK
|
||||
PROOF OMITTED
|
||||
|
||||
LEMMA NextInv ==
|
||||
Next =>
|
||||
/\ next_ts' = next_ts + 1 \/ UNCHANGED next_ts
|
||||
/\ \E reqs : SendReqs(reqs) \/ UNCHANGED req_msgs
|
||||
/\ \E resp : SendResp(resp) \/ UNCHANGED resp_msgs
|
||||
BY DEF Next, vars, msg_vars,
|
||||
ClientPrewriteOptimisistic, ClientPrewrited, ClientCommit, ClientLockKey,
|
||||
ClientLockedKey, ClientRetryLockKey, ClientPrewritePessimistic,
|
||||
ClientPrewrited, ClientCommit, ServerLockKey, ServerPrewritePessimistic,
|
||||
ServerPrewriteOptimistic, ServerCommit, ServerCleanupStaleLock,
|
||||
ServerCleanup, ServerResolveCommitted, ServerResolveRollbacked
|
||||
|
||||
LEMMA SpecNextTsMonotonicity == Spec => NextTsMonotonicity
|
||||
<1> SUFFICES ASSUME NEW ts \in Ts, TypeOK
|
||||
PROVE (ts <= next_ts) /\ [][Next]_vars => [](ts <= next_ts)
|
||||
BY SpecTypeOK DEF NextTsMonotonicity, Spec
|
||||
<1>2. (ts <= next_ts) /\ [Next]_vars => (ts <= next_ts)'
|
||||
BY NextInv DEF TypeOK, Ts, vars
|
||||
<1>3. QED
|
||||
BY <1>2, PTL
|
||||
|
||||
LEMMA SpecMsgMonotonicity == Spec => MsgMonotonicity
|
||||
<1>1. ASSUME NEW req \in ReqMessages
|
||||
PROVE req \in req_msgs /\ [][Next]_vars => [](req \in req_msgs)
|
||||
<2>1. req \in req_msgs /\ (\E reqs : SendReqs(reqs)) => (req \in req_msgs)'
|
||||
BY DEF SendReqs
|
||||
<2>2. req \in req_msgs /\ [Next]_vars => (req \in req_msgs)'
|
||||
BY <2>1, NextInv DEF vars, msg_vars
|
||||
<2>3. QED
|
||||
BY <2>2, PTL
|
||||
<1>2. ASSUME NEW resp \in RespMessages
|
||||
PROVE resp \in resp_msgs /\ [][Next]_vars => [](resp \in resp_msgs)
|
||||
<3>1. resp \in resp_msgs /\ (\E resp2 : SendResp(resp2)) => (resp \in resp_msgs)'
|
||||
BY DEF SendResp
|
||||
<3>2. resp \in resp_msgs /\ [Next]_vars => (resp \in resp_msgs)'
|
||||
BY <3>1, NextInv DEF vars, msg_vars
|
||||
<3>3. QED
|
||||
BY <3>2, PTL
|
||||
<1>3. QED
|
||||
BY <1>1, <1>2, SpecTypeOK DEF MsgMonotonicity, Spec
|
||||
=============================================================================
|
||||
@ -1,9 +1,3 @@
|
||||
# TLA+ for Distributed Transaction
|
||||
|
||||
The module contains a abstract specification of the transaction system implemented in TiKV. The implementation can be found in [TiKV Transaction Module](https://github.com/tikv/tikv/blob/master/src/storage/mvcc/txn.rs).
|
||||
|
||||
The module contains two TLA+ files: `DistributedTransaction.tla` and `DistributedTransactionProofs.tla`.
|
||||
|
||||
In most cases you will likely have an interest in only `DistributedTransaction.tla`, where the specification and safety invariants are defined. Besides that, in `DistributedTransactionProofs.tla`, there are some formal proofs, which are supposed to be build up gradually (so it's not completed yet), to the safety invariants.
|
||||
|
||||
To run the formal proofs in `DistributedTransactionProofs.tla`, you'd like to install the [TLAPS](https://tla.msr-inria.inria.fr/tlaps/content/Download/Binaries.html) (TLA+ Proof System) first. It's not distributed altogether with the TLA toolbox.
|
||||
The module contains a abstract specification of the transaction system implemented in TiKV. The server-side implementation can be found in [TiKV Transaction Module](https://github.com/tikv/tikv/tree/master/src/storage/txn).
|
||||
|
||||
Loading…
Reference in New Issue
Block a user