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/**
* Test migrating a big chunk while deletions are happening within that chunk. Test is slightly
* non-deterministic, since removes could happen before migrate starts. Protect against that by
* making chunk very large.
*
* This test is labeled resource intensive because its total io_write is 88MB compared to a median
* of 5MB across all sharding tests in wiredTiger.
* @tags: [resource_intensive]
*/
(function() {
'use strict';
var st = new ShardingTest({shards: 2, mongos: 1});
var dbname = "test";
var coll = "foo";
var ns = dbname + "." + coll;
assert.commandWorked(st.s0.adminCommand({enablesharding: dbname}));
st.ensurePrimaryShard(dbname, st.shard1.shardName);
var t = st.s0.getDB(dbname).getCollection(coll);
var bulk = t.initializeUnorderedBulkOp();
for (var i = 0; i < 200000; i++) {
bulk.insert({a: i});
}
assert.commandWorked(bulk.execute());
// enable sharding of the collection. Only 1 chunk.
t.createIndex({a: 1});
assert.commandWorked(st.s0.adminCommand({shardcollection: ns, key: {a: 1}}));
// start a parallel shell that deletes things
var join = startParallelShell("db." + coll + ".remove({});", st.s0.port);
// migrate while deletions are happening
assert.commandWorked(st.s0.adminCommand(
{moveChunk: ns, find: {a: 1}, to: st.getOther(st.getPrimaryShard(dbname)).name}));
join();
st.stop();
})();
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