mirror of https://github.com/mongodb/mongo
60 lines
2.6 KiB
JavaScript
60 lines
2.6 KiB
JavaScript
/**
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* Perform basic tests for the mergeChunks command against mongos.
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*/
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import {ShardingTest} from "jstests/libs/shardingtest.js";
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import {findChunksUtil} from "jstests/sharding/libs/find_chunks_util.js";
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let st = new ShardingTest({mongos: 2, shards: 2, other: {chunkSize: 1}});
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let mongos = st.s0;
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let kDbName = "db";
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let shard0 = st.shard0.shardName;
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let shard1 = st.shard1.shardName;
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let ns = kDbName + ".foo";
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assert.commandWorked(mongos.adminCommand({enableSharding: kDbName, primaryShard: shard0}));
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// Fail if invalid namespace.
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assert.commandFailed(mongos.adminCommand({mergeChunks: "", bounds: [{a: -1}, {a: 1}]}));
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// Fail if database does not exist.
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assert.commandFailed(mongos.adminCommand({mergeChunks: "a.b", bounds: [{a: -1}, {a: 1}]}));
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// Fail if collection is unsharded.
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assert.commandFailed(mongos.adminCommand({mergeChunks: kDbName + ".xxx", bounds: [{a: -1}, {a: 1}]}));
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// Errors if either bounds is not a valid shard key.
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assert.eq(0, mongos.getDB("config").chunks.count({ns: ns}));
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assert.commandWorked(mongos.adminCommand({shardCollection: ns, key: {a: 1}}));
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assert.eq(1, findChunksUtil.countChunksForNs(mongos.getDB("config"), ns));
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assert.commandWorked(mongos.adminCommand({split: ns, middle: {a: 0}}));
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assert.commandWorked(mongos.adminCommand({split: ns, middle: {a: -1}}));
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assert.commandWorked(mongos.adminCommand({split: ns, middle: {a: 1}}));
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// Fail if a wrong key
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assert.commandFailed(mongos.adminCommand({mergeChunks: ns, bounds: [{x: -1}, {a: 1}]}));
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assert.commandFailed(mongos.adminCommand({mergeChunks: ns, bounds: [{a: -1}, {x: 1}]}));
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// Fail if chunks do not contain a bound
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assert.commandFailed(mongos.adminCommand({mergeChunks: ns, bounds: [{a: -1}, {a: 10}]}));
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// Fail if chunks to be merged are not contiguous on the shard
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assert.commandWorked(st.s0.adminCommand({moveChunk: ns, bounds: [{a: -1}, {a: 0}], to: shard1, _waitForDelete: true}));
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assert.commandFailed(st.s0.adminCommand({mergeChunks: ns, bounds: [{a: MinKey()}, {a: MaxKey()}]}));
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assert.commandWorked(st.s0.adminCommand({moveChunk: ns, bounds: [{a: -1}, {a: 0}], to: shard0, _waitForDelete: true}));
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// Validate metadata
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// There are four chunks [{$minKey, -1}, {-1, 0}, {0, 1}, {1, $maxKey}]
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assert.eq(4, findChunksUtil.countChunksForNs(st.s0.getDB("config"), ns));
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// Use the second (stale) mongos to invoke the mergeChunks command so we can exercise the stale
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// shard version refresh logic
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assert.commandWorked(st.s1.adminCommand({mergeChunks: ns, bounds: [{a: -1}, {a: 1}]}));
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assert.eq(3, findChunksUtil.countChunksForNs(mongos.getDB("config"), ns));
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assert.eq(1, findChunksUtil.countChunksForNs(mongos.getDB("config"), ns, {min: {a: -1}, max: {a: 1}}));
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st.stop();
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