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/**
* Fills WiredTiger cache during recovery oplog application.
* @tags: [requires_persistence, requires_replication, requires_wiredtiger,
* requires_majority_read_concern]
*/
(function() {
'use strict';
load('jstests/libs/check_log.js');
const rst = new ReplSetTest({
nodes: [
{
slowms: 30000, // Don't log slow operations on primary.
},
{
// Disallow elections on secondary.
rsConfig: {
priority: 0,
votes: 0,
},
// Do not specify storage engine in this node's options because this will
// prevent us from overriding it on restart.
},
]
});
const nodes = rst.startSet({
// Start with a larger storage engine cache size to allow the secondary to write
// the oplog entries to disk. This setting will be adjusted downwards upon restart to
// test recovery behavior as the cache fills up.
// This overrides the --storageEngineCacheSideGB setting passed to resmoke.py but does not
// affect the default cache size on restart.
wiredTigerCacheSizeGB: 10,
});
rst.initiate();
const primary = rst.getPrimary();
const mydb = primary.getDB('test');
const coll = mydb.getCollection('t');
const numDocs = 2;
const minDocSizeMB = 10;
for (let i = 0; i < numDocs; ++i) {
assert.commandWorked(
coll.save({_id: i, i: 0, x: 'x'.repeat(minDocSizeMB * 1024 * 1024)},
{writeConcern: {w: nodes.length, wtimeout: ReplSetTest.kDefaultTimeoutMS}}));
}
assert.eq(numDocs, coll.find().itcount());
let secondary = rst.getSecondary();
const batchOpsLimit =
assert.commandWorked(secondary.adminCommand({getParameter: 1, replBatchLimitOperations: 1}))
.replBatchLimitOperations;
jsTestLog('Oplog application on secondary ' + secondary.host + ' is limited to ' + batchOpsLimit +
' operations per batch.');
// Disable snapshotting on secondary so that further operations do not enter the majority
// snapshot.
assert.commandWorked(
secondary.adminCommand({configureFailPoint: 'disableSnapshotting', mode: 'alwaysOn'}));
const numUpdates = 500;
jsTestLog('Writing ' + numUpdates + ' updates to ' + numDocs +
' documents on secondary after disabling snapshots.');
for (let i = 0; i < numDocs; ++i) {
for (let j = 0; j < numUpdates; ++j) {
assert.commandWorked(coll.update({_id: i}, {$inc: {i: 1}}));
}
}
jsTestLog('Waiting for updates on secondary ' + secondary.host + ' to be written to the oplog.');
rst.awaitReplication();
secondary = rst.restart(1, {
setParameter: {
logComponentVerbosity: tojsononeline({storage: {recovery: 2}}),
},
// Constrain the storage engine cache size to make it easier to fill it up with unflushed
// modification.
wiredTigerCacheSizeGB: 1,
});
// Verify storage engine cache size in effect during recovery.
const actualCacheSizeGB = assert.commandWorked(secondary.adminCommand({getCmdLineOpts: 1}))
.parsed.storage.wiredTiger.engineConfig.cacheSizeGB;
jsTestLog('Secondary was restarted with a storage cache size of ' + actualCacheSizeGB + ' GB.');
assert.eq(1, actualCacheSizeGB);
checkLog.contains(secondary, 'Starting recovery oplog application');
jsTestLog('Applying updates on secondary ' + secondary.host + ' during recovery.');
// This ensures that the node is able to complete recovery and transition to SECONDARY.
rst.awaitReplication();
rst.stopSet();
})();
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