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Advanced MongoDB #1
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Takahiro Inoue
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MongoDBのTipsや運用における注意点など、一歩進んだ内容を紹介します。書ききれないので#1です。
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Advanced MongoDB #1
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Collection “product”:
Collection “order”: { { "_id" : productId1, "_id" : orderId, "name" : name1, "user" : userInfo, "price" : price1, "items" : [ "desc" : description1 productId1, }, productId2, { productId3 "_id" : productId2, ] … }
10.
Collection “product”:
Collection “order”: { { "_id" : productId1, "_id" : orderId, "name" : name1, "user" : userInfo, "price" : price1, "items" : [ "desc" : description1 productId1, } productId2, { productId3 > db.product.findOne(“_id”:productId1) "_id" : productId2, ] > db.product.findOne(“_id”:productId2) … } > db.product.findOne(“_id”:productId3)
11.
Collection “order”: {
"_id" : orderId, "user" : userInfo, "items" : [ { "_id" : productId1, "name" : name1, "price" : price1 }, { "_id" : productId1, "name" : name1, "price" : price2 },... ] }
12.
Collection “order”: {
order "_id" : orderId, "user" : userInfo, "items" : [ collection name { price order "_id" : productId1, "name" : name1, > db.order.find({ items :{ "price" : price1 $elemMatch: { name: name1 } }, { } } ) "_id" : productId1, "name" : name1, > db.order.find({ items :{ "price" : price2 $elemMatch: { price:{ $gt: 3000 } } },... } } ) ] }
13.
Collection “order”:
Collection “performance_rating”: { { "_id" : orderId, "_id" : "employeeId", "user" : userInfo, "name" : "name", "items" : [ "post" : "section chief", { "abilities" : { "_id" : productId1, "skillA" : 20, "name" : name1, "skillC" : 12, "price" : price1 "skillE" : 18, }, { "skillF" : 24, "_id" : productId1, "skillG" : 23 "name" : name1, } "price" : price2 } },... ] }
14.
Collection “order”:
Collection “performance_rating”: { { "_id" : orderId, "_id" : "employeeId", $elemMatch "user" : userInfo, "name" : "name", "items" : [ "post" : "section chief", { "abilities" : { "_id" : productId1, "skillA" : 20, "name" : name1, "skillC" : 12, "price" : price1 "skillE" : 18, }, { "skillF" : 24, "_id" : productId1, "skillG" : 23 "name" : name1, } 1 "price" : price2 } },... ”abilities.skillA” ] }
15.
16.
17.
18.
Collection “blog”: {
comment "_id" : blogId, "user" : userInfo, "tags" : [tag1, tag2, tag3] 16MB/document "comment": [{ In-Place "_id" : commentId1, "user" : userInfo1, "contents" : contents1 }, { "_id" : commentId2, "user" : userInfo2, "contents" : contents2 },... ] }
19.
Collection “comment”: Collection “blog”:
{ { "_id" : commentId, "_id" : blogId, "user" : userInfo, "user" : userInfo, > "contents" : contents1, db.comment.insert({ "tags" : [tag1, tag2, tag3] “_id”:commentId5, "lastUpdate" : datetime, "comment" : [ “user”:... ... commentId1, }) },... commentId3, { commentId5 "_id" : commentId5, ],... "user" : userInfo, }, "contents" : contents1, > db.blog.update({“_id”:blogId}, { "lastUpdate" : datetime, {$push: { “comment”: commentId5 }} ... }) }
20.
21.
> db.coll.stats() {
... #1 "paddingFactor" : 1.4099999999940787, ... }
22.
23.
Collection “access_history”: {
"_id" : pageId, “start” 6 "start" : time, visitor "visits" : { "minutes" : [ “minites” [] [num0, num1, ..., num59], ( ) [num0, num1, ..., num59], [num0, num1, ..., num59], “minites” ”hours” [num0, num1, ..., num59], 0 [num0, num1, ..., num59], [num0, num1, ..., num59] ], "hours" : [num0, ..., num5] } }
24.
Collection “access_history”: {
"_id" : pageId, "start" : time, "visits" : { "minutes" : [ [0,0, ..., 0], [0,0, ..., 0], [0,0, ..., 0], [0,0, ..., 0], [0,0, ..., 0], [0,0, ..., 0] ], "hours" : [0, ..., 0] } }
25.
Collection “access_history”: {
"_id" : pageId, $inc "start" : time, "visits" : { "minutes" : [ [0,0, ..., 0], [3,0, ..., 0], > db.pages.update({ [0,0, ..., 0], "_id" : pageId, [0,0, ..., 0], "start" : thisHour },{ [0,0, ..., 0], "$inc": {"visits.minutes.1.0": 3} [0,0, ..., 0] }) ], "hours" : [0, ..., 0] } }
26.
> collection.insert(
{ "_id" : 123, /* other fields */, "garbage" : someLongString}) > collection.update( insert gabage { "_id": 123 }, { $unset: { "garbage" : 1} })
27.
28.
29.
30.
#
:( ) { "_id" : BinData(5,"iiOI5R6P+dbut19O1mS1lA=="), "reduce_id" : 0, _id = user_id "user_id" : 00000, + date "date" : 20110727, + timeMilliSec + action_type "action_type" : "a{Make}", "key_depth" : 1, _id "action_detail" : { Binary "kakejiku" : 2, # Python "kaizokunojyuu" : 1, bson.Binary( "matoryo-sika" : 1, hashlib.md5( str(unique_id) "syokudai" : 1 ).digest(), } bson.binary.MD5_SUBTYPE ) }
31.
32.
33.
{
"_id" : id, "name" : username, "email" : email, "phone" : phone, "twitter" : username, ”fax” "facebook" : username, "linkedin" : username, "google+" : number, "street" : street "city" : city, "state" : state, "zip" : zip, > db.profile.find({ "fax" : number “fax”: number }) }
34.
35.
{
"_id" : id, "name" : username, “online”: { "email" : email, "twitter" : username, ... }, ”address”: { ”telephone” "street" : street "city" : city, ... }, “telephone”: { "phone" : phone, > db.profile.find({ "fax" : number “telephone.fax”: number }) }
36.
37.
38.
# A
B C > db.coll.find({“A”: a, “B”: b, “C”: c}) # C B A > db.coll.find({“C”: c, “B”: b, “A”: a}) # A B C > db.coll.find($or: [“A”: a, “B”: b, “C”: c]) # C B A > db.coll.find($or: [“C”: c, “B”: b, “A”: a])
39.
C A
A A B B C C C A B B
40.
C
C C A B B C A A A B B
41.
42.
> db.coll.ensureIndex({ A:
1 }) > db.coll.ensureIndex({ B: 1 }) > db.coll.ensureIndex({ C: 1 }) # find 2 “Select A,B,C” > db.coll.find({ A: a, B: b, C: c }, { _id: -1, A: 1, B: 1, C: 1 }) (_id ) Covered Index
43.
44.
45.
46.
47.
journaling
:buildIndexes=false ReplicaSet 3 AWS Single Instance
48.
Slave Delay
1 journaling
49.
Micro Instance Small
Instance 32bit Large Instance Arbiter Small
50.
51.
$ ls /dbpath/rollback dbname.collname.2011-08-14T18-27-14.0.bson $
bsondump dbname.collname.2011-08-14T18-27-14.0.bson { "_id" : ... } { "_id" : ... } { "_id" : ... } Wed Aug 15 13:33:32 3 objects found
52.
53.
54.
55.
56.
57.
DC1
P DC1 S P DC2 Master DC2
58.
59.
> db.collname.insert({_id:...}) # > db.getLastError() #
or > db.runCommand("getlasterror")
60.
> db.runCommand({ getlasterror:
1, fsync: true }) { "err" : null, "n" : 0, "fsyncFiles" : 2, "ok" : 1 } > db.runCommand({ getlasterror: 1, j: true })
61.
> db.getLastError(2, 5000)
// w=2, timeout 5000ms > db.getLastError("majority")
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