TURKCELL s EXADATA Journey Part1 & Part 2
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1 TURKCELL s EXADATA Journey Part1 & Part 2 TURKCELL DBA Ferhat ŞENGÖNÜL May 2011
2 Who am I? 11 years in IT in finance sector. Works with (nearly) all db s from hierarchical to relation Found peace in Exadata Likes APEX (as an amateur) 1 year in Turkcell
3 Headlines Turkcell in numbers BI domain in numbers First project Migration to V2 (8 nodes) ( Total uncompressed size 250 TB) Second project Migration to 2 x2-2 s (16 nodes) Consolidation of 4 databases ( Total uncompressed size 600 TB) Geographical (continental) change of data center Future plans
4 Turkcell in Numbers Leading Telco in Turkey 34 million subscribers in Turkey as of Feb 28, 2011 Third biggest GSM operator in Europe in terms of subscribers Turkcell started its operations in February 1994 Turkcell co-operates in 8 other countries and has over 60 million subscribers total First and only Turkish company listed on NYSE Over 500 Oracle Databases, 150+ Production DB Machine hosts our biggest Database from DWH Domain
5 Turkcell s BI Environment Exadata Source DBs ETL AB Initio Oracle ODI Reporting MSTR Amount Of Data 3 Billion CDR per Day Other DWH DBs GB raw data extracted from 20+ source databases 5 TB Data on file system processed 2-3 TB loaded into databases, all into Exadata Approximately 600 TB Customer data stored in multiple Databases 600 TB (60 TB compressed) on Exadata
6 Turkcell s BI Environment Application Footprint ETL Environment AB Initio runs on 8 Node Linux Cluster Data loaded daily between 19:00-08:00 (SLA) Sql*Loader used to load tables with 16 parallel threads Works to implement external tables continue Reporting Environment MSTR (Microstrategy) is used mostly. 4 nodes before migration. 3 nodes after migration Users 3000 distinct reports with 50k run per month Runs between 08:00 20:00 (SLA)
7 First Project ( completed in July 2010) Turkcell s largest 100 TB (~250 TB uncompressed) DB was migrated to DBM v2, now only 25 TB with the help of HCC on Full SAS Rack Over 50K reports run every month on this DB, Performance improvement up-to 400x, average 10x 1 RACK instead of 11 RACKS
8 Business Drivers - Why Exadata? EMC DMX-4 70 TB HITACHI USP-V 50 TB Sun M9000 Sparc Threads ORACLE Exadata V2 OLD SYSTEM NEW SYSTEM Server Model Sun M9000 Oracle Exadata V2 Cpu Type Sun Sparc GHz Xeon E5540 Processors 2.53 GHz Number Of Cpu Threads Total Main Memory 512 GB 576 GB Total Storage Capacity 120 TB 30 TB Storage Connection Technology Fiber Channel (32 x 4 Gtbit/s) Infiniband ( 8 x 40 Gbit Storage Maximum IO Throughput Capacity 5 GB/s 21 GB/s Server + Storage units Total Power 57 KVA 20 KVA Server + Storage units Total Form Factor 11 Rack 1 Rack Approximate Data Backup Duration 44 Hours 14 Hours Number of Backup Tape Cartridges Per Backup
9 Business Drivers - Why Exadata? Simplified Architecture Full Rack replaces Sun M9000 & ten(10) Storage Cabinets Single Vendor Strategy It took Turkcell a few years to perfect current environment Exadata up & running in 5 days We need to address/deal with one party if a problem occurs Effortless Scalability: one to Multi-Rack Data volume explodes data size doubles every year (45TB to 100TB) Old storage environment was maxed out no chance to scale out Old env 600+ (EMC DMX4 & Hitatchi USP-V) disks with max I/O throughput of 5 GB/sec. vs 168 SAS disks with a max I/O throughput of 21 GB/sec.
10 0-5 dk 5-10 dk dk dk dk saat saat saat saat saat saat 4 saat 0-5 dk 5-10 dk dk dk dk saat saat saat saat saat saat 4 saat 0-5 dk 5-10 dk dk dk dk saat saat saat saat saat saat 4 saat 0-5 dk 5-10 dk dk dk dk saat saat saat saat saat saat 4 saat 0-5 dk 5-10 dk dk dk dk saat saat saat saat saat 0-5 dk 5-10 dk dk dk dk saat saat saat saat saat Business Drivers - Why Exadata? Avg Time Weekly Report Count & Run-time Exadata Migration min min 27 min 7 min 3 min 3 min Temmuz (05-11) Temmuz (12-18) Temmuz (19-25) Temmuz (26-01) Agustos(02-08) Agustos(09-15) Performance Needs Over 50K reports run every month on this DB Average report run time is reduced from 27 minutes to 3 minutes!!! Reports completed less than 5 mins rose from %45 to %90 Reports running more than 4 hours down from 87 to 1
11 The Project Overview Planned as simple migration No Application version or interface changes Migrate to new Exadata V2 machine Upgrade to new Oracle Version (from to ) Move from Single Instance to RAC 4 Months (Apr-July) testing of all the components Crash Tests (working closely with support) Network Transfer Speed Tests (10G vs IB) Backup/Restore Tests Performance Tests (RAT, Report run times, data load times)
12 Project Challenges Will we fit into 30 TB? (~100 TB 10g compressed) How to move that much data in 2 days? 100TB 10g compressed, how much of it can be moved before/after How much data needs to be moved during mig window What kind of Network infrastructure is needed to support such xfr rate 8-node RAC? (earlier attempts to use RAC did not go through) Training needs for RAC and exadata storage architecture Rollback plan: Parallel run (load data to both DB) Environment
13 Migration Facts Insert/append over DB Links Platform and version change forced us to use insert over db-link None of the other methods like TTS, ASM Rebalance was applicable Used in-house pl/sql utility to perform migration Metadata (Tablespaces were re-organized) Insert/Append with 128 parallel sessions partition-wise 40TB data was transferred during the migration window Transfer rate 300mB/sec, around 1 TB per hour approximately Completed in 36 hours. High CPU load on comp nodes because of HCC (expected) SQL*Net compressing the data 2-3x (this was a nice finding) 20 TB readonly data was transferred before, ~30TB after Network Infrastructure 10Gb-to-IB (Voltaire 4036E) gateway used to connect old system
14 Migration Facts After the test migration we ended-up staying on Exadata End users were so happy, they did not let us go back 3 Weeks before the go-live date we were live Parallel runs continued for few weeks till we completely feel comfortable on Exadata Stability of the system under real load was proved for various load patterns Backup/Restore tests were completed
15 Compression in Action Old System 10gR2 Compression ~2-3 times ~250TB raw data to 100TB Exadata V2 with EHCC Raw Data 250TB to 25TB (Data)+ 5TB (Temp) = 30TB EHCC - Compress ratio ~7-10x Archive compression is efficient but high CPU consumption SORT COMPRESS SIZE (GB) RATIO NOSORT NOCOMP 137,59 1 NOSORT Q_HIGH 21,21 6,48 SORT_A Q_HIGH 12,18 11,29 SORT_B Q_HIGH 15,37 8,95 SORT_A_B Q_HIGH 11,64 11,80
16 Performance Gains Report Name Old System Exadata by X CRC Control Report 0:15: :05:06.07 X2 prepaid bireysel toplam harcanan kontor tl 8:02: :51:33.20 X4.3 eom_equipment_utilization report 0:38: :00:23.34 X163 Eom equipment arpu report 0:09: :02:08.00 X4.5 Son 10 gun icinde yapilan gonderimler 0:17: :00:37.61 X45.7 Rapor 01. Satış Kanalı Kırılımında Blackberry 0:03: :00:00.66 X487 İnternet Paketleri Postpaid paketiçi ve paket 0:05: :01:00.34 X4.3 Connectcard Fatura tutarları 0:31: :00:46.51 X66.3 Connectcard Aktivasyon 0:25: :00:54.88 X44.9 Over 50K reports run every month Performance improvement is up-to 400x for some reports and on average it is 10x
17 User Feedbacks We heard before that infrastructure changes would give us performance gains but this time we were surprised with it, it was well over our expectations. Now we can take faster actions in this competitive environment. Director of Marketing Department XDDS is fantastic in a single word, none of the reports take more than 10 minutes, It was taking 3-4 hours before now it completes in 3 minutes. It sounds like un-real but it is real. Power end-user from Finance Department It was a never ending race to match the business' performance and capacity needs. With the Database Machine V2, we have outperformed our user's expectations and we are prepared for the future growth. Veteran System Admin You started to scare me MSTR updated her status on facebook. End-user from Marketing Department
18 I had a great holiday
19 Second Project Monthly 1 TB increase in size. Need a second RACK. Management was satisfied and bought 2 RACKS in stead of one. Migration of Data Center from Europe to Asia Consolidation on Exadata.
20 Operational Sources SMARTCUBE - MicroStrategy EXADATA x2-2 ODS CDRDM DDS Extract.... Feed RDS S BIS INFRASTRUCTURE ROADMAP
21 Moving the data! DDS 35 TB + 18 Ay SINGLE DWH ENVIRONMENT SINGLE WITHOUT DATABASE DUPLICATION RDS 5 TB OF DATA ODS 5 TB ZDDS 5TB CDRDM 15TB DEV DOMAIN 5 TB TEST DOMAIN 5 TB HIGH AVAILABILTY SOLUTION FOR DWH 50TB OTHER DBS 25TB SAS 60TB HOT SAS 20TB COLD 100TB COLD
22 Project Status (Feb 2011) RDS was migrated and became XRDS Size : 15 TB decreased to 3 TB A single tables compression rate 70x (Full of numbers) Performance increase 3x even the ETL Server and the DB are on different continents And runs in only one database node. (server pool which has only one node.)
23 Project Status (March 2011) CDRDM was migrated and became XCDRDM Size : 45 TB decreased to 15 TB Our aim is to use this space for ETL server migration.
24 Project Status (April 2011) Existing XDDS has migrated in April. ETL servers and reporting servers have migrated simultaneously.
25 Project Status (End of May 2011) ODS will be migrated in May The existing v2 system will turn into a high capacity disk system and will be the home of XCDRDM/dev/test and high availability system.
26 Migration method From Sun Solaris to Exadata Insert/append over dblink method. We still love our inhouse code. From Exadata v2 to Exadata x2 Incr0 backup in Europe / restore in Asia Incr1 backup in Europe / restore in Asia R/O the source, last incr1 backup and final restore at the target. Upgrade and open in Asia.
27 GAINS and PROJECTION DBNAME BEFORE AFTER END of 2011 END of 2012 XDDS 35TB 35TB 40TB 50TB XCDRDM 60TB 13TB 15TB 20TB XRDS 15TB 3TB 5TB 7TB ZDDS 15TB 3TB 5TB 7TB NODS 6TB 2TB 5TB 10TB ARA TOPLAM 96TB 21TB 30TB 44TB TOTAL 131TB 56TB 70TB 94TB 120 TB (net space) of disk is given back with the first project. 100 TB (net space) of disk is given back with the second project.
28 GAINS on reporting Avg Time 6,42 min 7,1 min 3,28 min Even though we re using only 8 nodes on X2-2 cluster, we had performance increase.
29 A little talk about server pools. Quality of Service 1 sec limit, unaware of parallel DML Server Pools Still can be used for dividing the nodes between servers. We do not want to run 2 different instances on the same node. But want to increase or decrease the number of nodes between systems. Still want to have the change to get all 16 nodes for 1 database.
30 What is waiting for the future Combining DDS,RDS and ODS together in a single database. (There will be only one database) At this moment everybody wants their DBs in exadata. All the test and development environments will be consolidated in high capacity SAS system.
31 Thank YOU Questions Ferhat ŞENGÖNÜL
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