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炬識科技股份有限公司
HOW TO PLAN A HADOOP
CLUSTER FOR TESTING AND
PRODUCTION ?
Present by Resource Planning2016/9/10
2016 Taiwan HadoopCon
Sep. 9~10th
www.athemaster.com2

前
言
非Best practice, 僅是分
享我們的經驗
名詞定義可能有所不同
我們的案例以CDH為主
Hard Drive Architecture
此測試案例下,JBOD比RAID約快1倍
RAID 0 與 JBOD查詢效能比較3
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測試環境
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4
¨  實體主機*5
¨  硬體規格
¤  AVAGO MegaRAID Controller *1
¤  Disk: 500GB *6
¤  CPU: 6Code *2
¤  RAM: 16G*8
¨  系統版本
¤  CentOS 6.6
¤  CDH 5.4.5
Test Plan
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¨  寫一個自動產生資料的程式
¨  使用名為“ADP”的 ETL工具進入HDFS中
¨  這裡的ADP為自行開發
¨  再用一支程式定時對Impala做scan
¨  也就是select count(*),來測試當資料量與查詢
時間的關係
Data Size
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¨  此次測試中每5分鐘生成一個table
¨  每一個table的資料數約介於630~670萬筆之間
JBOD:查詢效能測試結果
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RAID 0:查詢效能測試結果
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- 檔案讀取的效能
- 硬碟空間的使用效率
- 記憶體的使用需求 (每個namespace object
on NN約150 bytes)
HDFS Block Size and count9
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Factors (簡化版)
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¨  Input
¤  平均檔案大小
¤  檔案數量
¨  Output
¤  Block size (64MB/128MB/256MB)
¤  Master Node (NameNode service)記憶體需求
(128GB/256GB/516GB)
更多資訊
https://www.cloudera.com/documentation/enterprise/latest/topics/
admin_nn_memory_config.html
https://martin.atlassian.net/wiki/pages/viewpage.action?pageId=26148906
內文提到一篇” HDFS Scalability whitepaper”,有非常詳細計算方式。
當資料要翻山越嶺才會到達Hadoop
Cluster的時候…A story
網路環境11
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Testing and Production
測試環境與正式環境12
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測試環境特性
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13
¨  快速部署
¨  通常要在硬體規格與數量不足的狀況下進行
¨  通常不要求高可用(有HA測試項目者例外)
¨  通常不要求效能
¨  注重與其他系統間的整合測試
正式環境特性
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¨  重視系統耐久度(短時間內不再投資)
¨  重視高可用性
¨  雖然Hadoop不會用在交易系統,但是通常仍
有一定的效能要求
¨  可能有備援要求
Poodle
測試環境案例一15
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測試重點
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¨  結構化資料ETL進入HDFS的可用性
¨  不同種類的資料相容性
¨  與SQL Server的效能比較
硬體規格
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¨  節點角色數量
¤  Master Node*2
¤  Worker Node*3
¨  伺服器硬體規格
¤  Dell R430 1U Rack Server*5
n  Intel Xeon E5-2620 v3 2.4GHz,15M Cache,8.00GT/s
n  QPI,Turbo,HT,6C/12T *2
n  128GB(16 *8 GB) RDIMM,2133 MT/s,Dual Rank,
n  4TB SAS HDD 35 7200 rpm *4
n  PERC H730 Integrated RAID Controller Size:1024 MB
n  Hard Drive Architecture: 除了保留部分空間給 /boot和
swap外,其餘空間全部給 /,不使用LVM
來源資料
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資料格式
 單一檔案大小
 最大檔案數
 總檔案大小
DB dump file
 7.5GB
 6
 45GB
DB dump file
 12.5GB
 6
 75GB
evtx
 30~50MB
 4
 1GB
Txt
 1.5KB
 2
 3KB
Hadoop vs. SQL Server查詢效能
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19
	
System 	
1 	 5 	 10 	 20 	
Cloudera 	 19(m)19(s)	 21(m)	 24(m)	 43(m)	
MS-SQL 	 3(m)42(s)	 4(m)	 6(m)	
N/A	
(Loading
)
Dahlia 
測試環境案例二20
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測試重點
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¨  資料輸入 – SQL Server, Oracle, Teradata, AWS
(Sqoop)
¨  資料輸出 – SQL Server, Oracle, Teradata, AWS
(Impala, Hive)
¨  資高可用性 – NameNode HA, Cluster HA
¨  安全性 – 授權、加密、資料遮罩
¨  容量與性能 – Data compression, performance
monitoring
¨  硬體數量不足,BI工具需要專屬主機
¨  如何用兩台主機架設Hadoop, 且可驗證HA?
硬體規格(細節)
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內    容 數量
System x3650 M5 ODD Cable Kit 3
Ultraslim 9.5mm SATA DVD-ROM 3
POWER CODE 6
Intel Xeon Processor E5-2630 v3 8C 2.4GHz 20MB Cache 1866MHz 85W 3
System x3650 M5 Plus 8x 2.5 HS HDD Assembly Kit with Expander 3
System x 550W High Efficiency Platinum AC Power Supply for x3650 M5 3
System x3650 M5 PCIe Riser 1 (2 x8 FH/FL + 1 x8 ML2 Slots) 3
600GB 10K 12Gbps SAS 2.5in G3HS 512e HDD 36
32GB TruDDR4 Memory (4Rx4, 1.2V) PC417000 CL15 2133MHz LP LRDIMM 48
X3650M5 1*E5-2630 v3 8C (85W) 2.4GHZ 20MB CACHE 1866 Mhz,
1 X 16GB ECC RDIMM (1.2V), 8*2.5 HS SAS/SATA/Max 18,
M5210 1Gb Flash,4*1GB ETHERNET, 1*550W RPS,3Y
3
節點角色配置
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主機編號 硬體規格 節點角色
PM-01
(VM01~06)
CPU: 8 Core*2
MEM: 512GB
HDD: SAS 600GB*12
Master Node 01
Master Node 02
Master Node 03
Worker Node 01
Worker Node 02
Worker Node 03
PM-02
(VM07~08)
CPU: 8 Core*2
MEM: 512GB
HDD: SAS 600GB*12

Utility Node 01 (CM Server, CM)
Edge Node 01 (Oracle)
PM-03 CPU: 8 Core*2
MEM: 512GB
HDD: SAS 600GB*12

Edge Node 02 (BI Tool)
PM-01 叢集服務配置
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完成以下高可用性測試
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¨  運算過程中Shutdown一台DataNode
¨  運算過程中Shutdown Primary NameNode
¨  運算過程中增加一個Node
¨  運算過程中Shutdown Primary CM DB
Taroko
正式環境案例一26
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需求重點
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27
¨  Hadoop與EDA軟體整合
¨  ETL系統需要搭載一個RDM
¨  需要儲存到兩年的資料
硬體規格與節點角色
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叢集服務配置
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Andes
正式環境案例二30
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需求重點
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31
¨  高可用性
¨  查詢效能
¨  系統管理員與開發人員權限管理
硬體規格
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32
Role	 Master	Node(01~03)	 Worker	Node(01~10)	
Server	Qty	 3	 10	
Model	 HP	DL360	Gen9	 HP	DL360	Gen9	
CPU	
E5-2600v3	 E5-2600v3	
16	core	2.6GHz	 12	core	2.4GHz	
(Dual	8	core)	 (Dual	6	core)	
RAM	 256	GB	(32GB*8)	 256	GB	(32GB*8)	
DISK	
6	*	600	GB	 12	*	4TB	(3.5	SAS	7.2K	rpm)	
2.5	SAS	15K	rpm	 2	*	600GB	(3.5	SAS	15K	rpm)	
  (Support	12	Gbps	RAID)	
RAID	
RAID-1	(OS)	 RAID-1	(OS)	
RAID-10	(DATA)	 JBOD	(DATA)	
NIC	 10GbE	*	2(LACP)	 10GbE	*	2(LACP)	
另外還有兩
台Edge
Node, 程
式人員只能
從該節點連
線叢集。
叢集服務配置
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33
Others and Edge
Node 01
Master Node 01
Master Node 02
Master Node 03
Edge Node 02
Worker Node 02
13? 22? 
為什麼會看到這麼多節點?
因為這些節點上安裝 cloudera-scm-agent,並且向CM 註冊過。
*Edge Node與軟體授權*
YARN Pending Containers 
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34
進階 CM DB HA
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35
¨  Postgresql server HA 
¤  Failover - 當active的pgsql故障後,
pgpool會自動把standby的pgsql轉換成
active以繼續運作。
¤  Recovery - 把active的pgsql資料複製到
standby的pgsql,使資料一致。
¤  Failback - 故障排除的pgsql(原active)重
新連結pgpool並回到active角色。
¨  Pgpool HA 
¤  Failover : 當active的pgpool故障後,
watchdog會提醒並自動把standby的
pgpool轉換成active以繼續運作。
¤  Failback : 故障排除後的pgpool(原active)
會自動重新與active pgpool建立連結。
Amazon
正式環境案例三36
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需求重點
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37
¨  瞬間資料量大 (8000EPS)
¨  每日累積資料量大 (超過1TB)
¨  希望盡可能拉長資料儲存區間
¨  新舊設備混用
硬體規格與節點角色配置
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38
Role 資料擷取分流 硬體規格
Master Node 01 N/A CPU: 12 Core
MEM: 16GB*14
HDD: 2.5” 300GB*2(RAID 1)
3.5” 4TB*12 (JBOD)
Master Node 02 N/A
(舊)Worker Node 01 Adaptor 01 CPU: 12 Core
MEM: 16GB*12
HDD: 2.5” 300GB*2(RAID 1)
3.5” 4TB*12 (JBOD)
(舊)Worker Node 02 Adaptor 02
(舊)Worker Node 03 Adaptor 03
Worker Node 04 Adaptor 04 CPU: 12 Core
MEM: 16GB*12
HDD: 2.5” 300GB*2(RAID 1)
3.5” 4TB*12 (JBOD)
Worker Node 05 Adaptor 05
Worker Node 06 Adaptor 06
Worker Node 07 N/A
Worker Node 08 N/A CPU: 12 Core
MEM: 16GB*12
HDD: 3.5” 4TB*12 (JBOD)
叢集服務配置
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39
Cloudera Manager
官方說法
What is new?40
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Cloudera 5.8 官方建議
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41
2016 Technical Summit
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42
CDH Next Focus
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43
¨  improving Impala
¨  SQL Knowledge worker Experience (Hue)
¨  Data Science Knowledge worker
Experience (kudu)
¨  Cloud - integration with major public/
private Cloud service provider through API
Kudu: Columnar Store
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44
info@athemaster.com
Thank you45
www.athemaster.com

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