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/**
* Tests readConcern level snapshot outside of transactions.
*
* @tags: [
* requires_majority_read_concern,
* requires_persistence,
* ]
*/
(function() {
"use strict";
load("jstests/libs/global_snapshot_reads_util.js");
load("jstests/sharding/libs/sharded_transactions_helpers.js");
load("jstests/sharding/libs/find_chunks_util.js");
const nodeOptions = {
// Set a large snapshot window of 10 minutes for the test.
setParameter: {minSnapshotHistoryWindowInSeconds: 600}
};
const dbName = "test";
const shardedCollName = "shardedColl";
const unshardedCollName = "unshardedColl";
function setUpAllScenarios(st) {
assert.commandWorked(st.s.adminCommand({enableSharding: dbName}));
assert.commandWorked(st.s.adminCommand(
{shardCollection: st.s.getDB(dbName)[shardedCollName] + "", key: {_id: 1}}));
}
let shardingScenarios = {
singleShard: {
compatibleCollections: [shardedCollName, unshardedCollName],
setUp: function() {
const st = new ShardingTest({
mongos: 1,
config: 1,
shards: {rs0: {nodes: 2}},
other: {configOptions: nodeOptions, rsOptions: nodeOptions}
});
setUpAllScenarios(st);
return st;
}
},
multiShardAllShardReads: {
compatibleCollections: [shardedCollName],
setUp: function() {
let st = new ShardingTest({
shards: {
rs0: {nodes: 2},
rs1: {nodes: 2},
rs2: {nodes: 2},
},
mongos: 1,
config: 1,
other: {configOptions: nodeOptions, rsOptions: nodeOptions}
});
setUpAllScenarios(st);
const mongos = st.s0;
const ns = dbName + '.' + shardedCollName;
// snapshotReadsTest() inserts ids 0-9 and tries snapshot reads on the collection.
assert.commandWorked(st.splitAt(ns, {_id: 4}));
assert.commandWorked(st.splitAt(ns, {_id: 7}));
assert.commandWorked(
mongos.adminCommand({moveChunk: ns, find: {_id: 0}, to: st.shard0.shardName}));
assert.commandWorked(
mongos.adminCommand({moveChunk: ns, find: {_id: 4}, to: st.shard1.shardName}));
assert.commandWorked(
mongos.adminCommand({moveChunk: ns, find: {_id: 7}, to: st.shard2.shardName}));
assert.eq(1,
findChunksUtil.countChunksForNs(
mongos.getDB('config'), ns, {shard: st.shard0.shardName}));
assert.eq(1,
findChunksUtil.countChunksForNs(
mongos.getDB('config'), ns, {shard: st.shard1.shardName}));
assert.eq(1,
findChunksUtil.countChunksForNs(
mongos.getDB('config'), ns, {shard: st.shard2.shardName}));
flushRoutersAndRefreshShardMetadata(st, {ns});
return st;
}
},
// Only two out of three shards have documents.
multiShardSomeShardReads: {
compatibleCollections: [shardedCollName],
setUp: function() {
let st = new ShardingTest({
shards: {
rs0: {nodes: 2},
rs1: {nodes: 2},
rs2: {nodes: 2},
},
mongos: 1,
config: 1,
other: {configOptions: nodeOptions, rsOptions: nodeOptions}
});
setUpAllScenarios(st);
const mongos = st.s0;
const ns = dbName + '.' + shardedCollName;
// snapshotReadsTest() inserts ids 0-9 and tries snapshot reads on the collection.
assert.commandWorked(st.splitAt(ns, {_id: 5}));
assert.commandWorked(
mongos.adminCommand({moveChunk: ns, find: {_id: 0}, to: st.shard1.shardName}));
assert.commandWorked(
mongos.adminCommand({moveChunk: ns, find: {_id: 7}, to: st.shard2.shardName}));
assert.eq(0,
findChunksUtil.countChunksForNs(
mongos.getDB('config'), ns, {shard: st.shard0.shardName}));
assert.eq(1,
findChunksUtil.countChunksForNs(
mongos.getDB('config'), ns, {shard: st.shard1.shardName}));
assert.eq(1,
findChunksUtil.countChunksForNs(
mongos.getDB('config'), ns, {shard: st.shard2.shardName}));
flushRoutersAndRefreshShardMetadata(st, {ns});
return st;
}
}
};
for (let [scenarioName, scenario] of Object.entries(shardingScenarios)) {
scenario.compatibleCollections.forEach(function(collName) {
jsTestLog(`Run scenario ${scenarioName} with collection ${collName}`);
let st = scenario.setUp();
let primaryAdmin = st.rs0.getPrimary().getDB("admin");
assert.eq(assert
.commandWorked(primaryAdmin.runCommand(
{getParameter: 1, minSnapshotHistoryWindowInSeconds: 1}))
.minSnapshotHistoryWindowInSeconds,
600);
function awaitCommittedFn() {
for (let i = 0; st['rs' + i] !== undefined; i++) {
st['rs' + i].awaitLastOpCommitted();
}
}
// Pass the same DB handle as "primaryDB" and "secondaryDB" params; the test functions will
// send readPreference to mongos to target primary/secondary shard servers.
let db = st.s.getDB(dbName);
let snapshotReadsTest = new SnapshotReadsTest(
{primaryDB: db, secondaryDB: db, awaitCommittedFn: awaitCommittedFn});
snapshotReadsTest.cursorTest({testScenarioName: scenarioName, collName: collName});
if (collName === shardedCollName) {
// "distinct" prohibited on sharded collections.
assert.commandFailedWithCode(
db.runCommand({distinct: collName, key: "_id", readConcern: {level: "snapshot"}}),
ErrorCodes.InvalidOptions);
} else {
snapshotReadsTest.distinctTest({testScenarioName: scenarioName, collName: collName});
}
st.stop();
});
}
})();
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